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MAX5384EUT+T

hot MAX5384EUT+T

MAX5384EUT+T

For Reference Only

Part Number MAX5384EUT+T
Manufacturer Maxim Integrated
Description IC DAC 8BIT 3WIRE SER SOT23-6
Datasheet MAX5384EUT+T Datasheet
Package SOT-23-6
In Stock 14156 piece(s)
Unit Price $ 1.0159 *
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MAX5384EUT+T Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - Data Acquisition - Digital to Analog Converters (DAC)
Datasheet MAX5384EUT+T Datasheet
PackageSOT-23-6
Series-
Number of Bits8
Number of D/A Converters1
Settling Time20µs (Typ)
Output TypeVoltage - Buffered
Differential OutputNo
Data InterfaceSPI
Reference TypeInternal
Voltage - Supply, Analog5V
Voltage - Supply, Digital5V
INL/DNL (LSB)±1 (Max), ±1 (Max)
ArchitectureCurrent Steering
Operating Temperature-40°C ~ 85°C
Package / CaseSOT-23-6
Supplier Device PackageSOT-23-6

MAX5384EUT+T Datasheet

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General Description The MAX5383/MAX5384/MAX5385 low-cost, 8-bit digital- to-analog converters (DACs) in miniature 6-pin SOT23 packages have a simple 3-wire, SPI™/QSPI™/ MICROWIRE™-compatible serial interface that operates up to 10MHz. The MAX5383 has an internal +2V refer- ence and operates from a +2.7V to +3.6V supply. The MAX5384 has an internal +4V reference and operates from a +4.5V to +5.5V supply. The MAX5385 operates over the full +2.7V to +5.5V supply range and has an internal reference equal to 0.9 ✕ VDD. The MAX5383/MAX5384/MAX5385 require an extremely low supply current of only 150µA (typ) and provide a buffered voltage output. These devices power up at zero code and remain there until a new code is written to the DAC registers. This provides additional safety for appli- cations that drive valves or other transducers that need to be off on power-up. The MAX5383/MAX5384/ MAX5385 include a 1µA, low-power shutdown mode that features software-selectable output loads of 1kΩ, 100kΩ, or 1MΩ to ground. Applications Automatic Tuning (VCO) Power Amplifier Bias Control Programmable Threshold Levels Automatic Gain Control Automatic Offset Adjustment Features ♦ 8-Bit Resolution in a Miniature 6-Pin SOT23 Package ♦ Wide +2.7V to +5.5V Supply Range (MAX5385) ♦ <1µA Shutdown Mode ♦ Software-Selectable Output Resistance During Shutdown ♦ Buffered Output Drives Resistive Loads ♦ Low-Glitch Power-On Reset to Zero DAC Output ♦ 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface ♦ < ±5% Full-Scale Error (MAX5385) ♦ < ±1LSB max INL/DNL ♦ Low 230µA (max) Supply Current M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 ________________________________________________________________ Maxim Integrated Products 1 GND DINVDD 1 + 6 5 SCLK OUT MAX5383 MAX5384 MAX5385 SOT23 TOP VIEW 2 3 4 CS Pin Configuration GND MC68XXXX PCS0 VDD OUT SCK MOSI SCLK DIN MAX5385 +2.7V TO +5.5V CS Typical Operating Circuit 19-1718; Rev 3; 1/09 Ordering Information SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. PART TEMP RANGE PIN- PACKAGE SOT TOP MARK MAX5383EUT+T -40°C to +85°C 6 SOT23 AADF MAX5383EZT+T -40°C to +85°C 6 SOT23-Thin AAAH MAX5384EUT+T -40°C to +85°C 6 SOT23 AADH MAX5384EZT+T -40°C to +85°C 6 SOT23-Thin AAAI MAX5385EUT+T -40°C to +85°C 6 SOT23 AADJ MAX5385EZT+T -40°C to +85°C 6 SOT23-Thin AAAJ Selector Guide PART INTERNAL REFERENCE MAX5383 2V MAX5384 4V MAX5385 0.9 ✕ VDD For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. +Denotes lead(Pb)-free/RoHS-compliant package. T = Tape and reel.

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VDD = +2.7V to +3.6V (MAX5383), VDD = +4.5V to +5.5V (MAX5384), VDD = +2.7V to +5.5V (MAX5385), RL = 10kΩ, CL = 50pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. VDD to GND..............................................................-0.3V to +6V OUT ............................................................-0.3V to (VDD + 0.3V) CS, SCLK, DIN to GND ............................................-0.3V to +6V Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........696mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Maximum Junction Temperature .....................................+150°C Lead Temperature (soldering, 10s) .................................+300°C PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC ACCURACY Resolution 8 Bits Integral Linearity Error INL (Note 1) ±1 LSB Differential Linearity Error DNL Guaranteed monotonic ±1 LSB Offset Error VOS (Note 2) ±1 ±25 mV Offset Error Supply Rejection MAX5385 (Notes 2, 3) 60 dB MAX5383/MAX5384 3Offset Error Temperature Coefficient MAX5385 1 ppm/°C M AX 5383/M AX 5384 10 Full-Scale Error C ode = 255, no l oad MAX5385 5 % of i d eal FS Full-Scale Error Supply Rejection C od e = 255 ( N ote 4) M AX 5383/M AX 5384 50 dB M AX 5383/M AX 5384 ±40Full-Scale Error Temperature Coefficient Code = 255 MAX5385 ±10 ppm/°C DAC OUTPUT MAX5383 1.8 2 2.2 MAX5384 3.6 4 4.4Internal Reference Voltage (Note 5) REF MAX5385 0.85 × VDD 0.9 × VDD 0.95 × VDD V Code = 255, 0µA to 100µA 0.5 Output Load Regulation Code = 0, 0µA to 100µA 0.5 LSB [D13, D12] = 0, 1 1k [D13, D12] = 1, 0 100k Shutdown Output Resistance to GND VOUT = 0 to VDD [D13, D12] = 1, 1 1M Ω DYNAMIC PERFORMANCE Voltage Output Slew Rate Positive and negative 0.4 V/µs Output Settling Time To 1/2 LSB, 50kΩ and 50pF load (Note 6) 20 µs Digital Feedthrough Code = 0, all digital inputs from 0 to VDD 2 nVs

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VDD = +2.7V to +3.6V (MAX5383), VDD = +4.5V to +5.5V (MAX5384), VDD = +2.7V to +5.5V (MAX5385), RL = 10kΩ, CL = 50pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) TIMING CHARACTERISTICS (Figures 3 and 4, VDD = +2.7V to +3.6V (MAX5383), VDD = +4.5V to +5.5V (MAX5384), VDD = +2.7V to +5.5V (MAX5385), RL = 10kΩ, CL = 50pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) (Note 7) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Digital-Analog Glitch Impulse Code 127 to 128 40 nVs Wake-Up Time From software shutdown 50 µs POWER REQUIREMENTS MAX5383 2.7 3.6 MAX5384 4.5 5.5Supply Voltage VDD MAX5385 2.7 5.5 V No load, all digital inputs at 0 or VDD, code = 255 150 230 Supply Current IDD Shutdown mode 1 µA DIGITAL INPUTS Input Low Voltage VIL 0.3 × VDD V Input High Voltage VIH 0.7 × V DD V Input Hysteresis VH 0.05 × VDD V Input Capacitance CIN (Note 7) 10 pF Input Leakage Current IIN ±1 µA PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SCLK Period tCP 100 ns SCLK Pulse Width High tCH 40 ns SCLK Pulse Width Low tCL 40 ns CS Fall to SCLK Rise Setup Time tCSS 40 ns SCLK Rise to CS Rise Hold Time tCSH 0 ns DIN Setup Time tDS 40 ns DIN Hold Time tDH 0 ns SCLK Rise to CS Fall Delay tCS0 10 ns

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 4 _______________________________________________________________________________________ -0.050 -0.075 -0.100 0 -0.025 0.025 0.050 0.075 INTEGRAL NONLINEARITY vs. CODE M A X 5 3 8 3 /4 /5 -0 1 CODE IN L (L S B ) 0 100 15050 200 250 300 0 -0.10 -0.20 2.5 4.03.0 3.5 4.5 5.0 5.5 INTEGRAL NONLINEARITY vs. SUPPLY VOLTAGE M A X 5 3 8 3 /4 /5 -0 2 SUPPLY VOLTAGE (V) IN L (L S B ) -0.05 -0.15 0 -0.025 -0.050 -40 20-20 0 40 60 80 100 INTEGRAL NONLINEARITY vs. TEMPERATURE M A X 5 3 8 3 /4 /5 -0 3 TEMPERATURE (°C) IN L (L S B ) -0.020 -0.010 -0.015 -0.005 0 0.005 0.010 0 100 200 300 DIFFERENTIAL NONLINEARITY vs. CODE M A X 5 3 8 3 /4 /5 -0 4 CODE D N L (L S B ) 0 -0.015 -0.020 -0.010 -0.005 -0.025 2.5 4.03.0 3.5 4.5 5.0 5.5 DIFFERENTIAL NONLINEARITY vs. SUPPLY VOLTAGE M A X 5 3 8 3 /4 /5 -0 5 SUPPLY VOLTAGE (V) D N L (L S B ) 0 -0.010 -0.015 -0.020 -0.005 -0.025 -40 20-20 0 40 60 80 100 DIFFERENTIAL NONLINEARITY vs. TEMPERATURE M A X 5 3 8 3 /4 /5 -0 6 TEMPERATURE (°C) D N L (L S B ) Typical Operating Characteristics (VDD = +3.0V (MAX5383), VDD = +5.0V (MAX5384/MAX5385), TA = +25°C, unless otherwise noted.) TIMING CHARACTERISTICS (continued) (Figures 3 and 4, VDD = +2.7V to +3.6V (MAX5383), VDD = +4.5V to +5.5V (MAX5384), VDD = +2.7V to +5.5V (MAX5385), RL = 10kΩ, CL = 50pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) (Note 7) Note 1: Guaranteed from code 5 to code 255. Note 2: The offset value extrapolated from the range over which the INL is guaranteed. Note 3: MAX5385 tested at 5V ±10%. Note 4: MAX5383 tested at 3V ±10%; MAX5384 tested at 5V ±10%. Note 5: Actual output voltages at full-scale are 255/256 ✕ VREF. Note 6: Output settling time is measured by stepping from code 5 to code 255, and from code 255 to code 5. Note 7: Guaranteed by design. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CS Rise to SCLK Rise Hold tCS1 40 ns CS Pulse Width High tCSW 100 ns

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 _______________________________________________________________________________________ 5 -0.20 -0.10 -0.15 -0.05 0 0.05 0.10 0.15 0 100 200 300 TOTAL UNADJUSTED ERROR vs. CODE M A X 5 3 8 3 /4 /5 -0 7 CODE TU E (L S B ) 0 -0.25 -0.50 2.5 4.03.0 3.5 4.5 5.0 5.5 OFFSET ERROR vs. SUPPLY VOLTAGE M A X 5 3 8 3 /4 /5 -0 8 SUPPLY VOLTAGE (V) V O S ( m V ) 0 -0.25 -0.50 -40 20-20 0 40 60 80 100 OFFSET ERROR vs. TEMPERATURE M A X 5 3 8 3 /4 /5 -0 9 TEMPERATURE (°C) V O S (m V ) 0.75 0.25 0 -0.25 -0.50 0.50 -0.75 2.5 4.03.0 3.5 4.5 5.0 5.5 FULL-SCALE ERROR vs. SUPPLY VOLTAGE MAX5383/4/5-10 SUPPLY VOLTAGE (V) FU LL -S C A LE E R R O R ( LS B ) 1.2 0.4 0 -0.4 -0.8 0.8 -1.2 FU LL -S C A LE E R R O R ( % ) MAX5384 MAX5383 MAX5385 0.75 0.25 0 -0.25 -0.50 0.50 -0.75 1.2 0.4 0 -0.4 -0.8 0.8 -1.2 -40 20-20 0 40 60 80 100 FULL-SCALE ERROR vs. TEMPERATURE MAX5383/4/5-11 TEMPERATURE (°C) FU LL -S C A LE E R R O R ( LS B ) FU LL -S C A LE E R R O R ( % ) MAX5385 MAX5383 MAX5384 200 140 120 100 60 80 20 40 160 180 0 2.5 4.03.0 3.5 4.5 5.0 5.5 SUPPLY CURRENT vs. SUPPLY VOLTAGE M A X 5 3 8 3 /4 /5 -1 2 SUPPLY VOLTAGE (V) S U P P LY C U R R EN T (µ A ) MAX5383 MAX5384 MAX5385 160 150 145 140 135 155 130 -40 20-20 0 40 60 80 100 SUPPLY CURRENT vs. TEMPERATURE M A X 5 3 8 3 /4 /5 -1 3 TEMPERATURE (°C) S U P P LY C U R R EN T (µ A ) MAX5384 MAX5385 MAX5383 NO LOAD Typical Operating Characteristics (continued) (VDD = +3.0V (MAX5383), VDD = +5.0V (MAX5384/MAX5385), TA = +25°C, unless otherwise noted.)

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (VDD = +3.0V (MAX5383), VDD = +5.0V (MAX5384/MAX5385), TA = +25°C, unless otherwise noted.) 1.0 0.6 0.4 0.2 0.8 0 -40 20-20 0 40 60 80 100 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE M A X 5 3 8 3 /4 /5 -1 6 TEMPERATURE (°C) S U P P LY C U R R EN T (µ A ) VDD = +5V VDD = +3V 2.0 1.5 2.5 3.0 4.0 3.5 4.5 0 0.1 0.2 0 21 43 65 8 97 10 OUTPUT LOAD REGULATION MAX5383/4/5-17 LOAD CURRENT (mA) A: MAX5384/MAX5385, VDD = +4.5V, FULL SCALE OR SOURCING B: MAX5383, FULL SCALE, VDD = +2.7V SINKING, VDD = +5.0V SOURCING C: MAX5383, FULL SCALE, VDD = +2.7V SOURCING D: ZERO CODE, VDD = +2.7V SINKING E: ZERO CODE, VDD = +5.5V SINKING V O U T FU LL S C A LE ( V ) V O U T ZE R O C O D E (V ) A B C D E 4µs/div OUTPUT VOLTAGE ON POWER-UP M A X 5 3 8 3 /4 /5 -1 8 OUT 50mV/div VDD 2V/div 10µs/div MAX5383 OUTPUT VOLTAGE EXITING SHUTDOWN M A X 5 3 8 3 /4 /5 -1 9 OUT 500mV/div CS 3V/div SHDN TO 0 x 80 1µs/div MAX5383 OUTPUT SETTLING FROM 1/4FS TO 3/4FS M A X 5 3 8 3 /4 /5 -2 0 OUT 0.5V/div CS 3V/div 1µs/div MAX5383 OUTPUT SETTLING FROM 3/4FS TO 1/4FS M A X 5 3 8 3 /4 /5 -2 1 OUT 0.5V/div CS 3V/div 160 150 145 140 135 155 130 0 9632 64 128 160 192 224 256 SUPPLY CURRENT vs. CODE M A X 5 3 8 3 /4 /5 -1 4 CODE S U P P LY C U R R EN T (µ A ) MAX5384 VDD = +5V MAX5385 VDD = +5V MAX5383 VDD = +3V MAX5383 VDD = +5V 1.0 0.4 0.2 0.6 0.8 0 2.5 4.03.0 3.5 4.5 5.0 5.5 SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE M A X 5 3 8 3 /4 /5 -1 5 SUPPLY VOLTAGE (V) S U P P LY C U R R EN T (µ A )

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Detailed Description The MAX5383/MAX5384/MAX5385 voltage-output, 8-bit DACs ensure monotonic performance by offering full 8- bit performance with less than 1LSB integral nonlineari- ty error and less than 1LSB differential nonlinearity error. The devices use a simple 3-wire, SPI/QSPI/ MICROWIRE-compatible serial interface that operates up to 10MHz. They include an internal reference, an output buffer, and three low-current shutdown modes, making these devices ideal for low-power, highly inte- grated applications. Figure 1 shows the devices’ func- tional diagram. Analog Section The MAX5383/MAX5384/MAX5385 employ a current- steering DAC topology as shown in Figure 2. At the core of the DAC is a reference voltage-to-current con- verter (V/I) that generates a reference current. This cur- rent is mirrored to 255 equally weighted current sources. DAC switches control the outputs of these cur- rent mirrors so that only the desired fraction of the total current-mirror currents is steered to the DAC output. The current is then converted to a voltage across a resistor, and this voltage is buffered by the output buffer amplifier. Output Voltage Table 1 shows the relationship between the DAC code and the analog output voltage. The 8-bit DAC code is binary unipolar with 1LSB = (VREF/256). The MAX5383/ MAX5384 have a full-scale output voltage of (+2V - 1LSB) and (+4V - 1LSB), set by the internal references. The MAX5385 has a full-scale output voltage of (0.9 ✕ VDD - 1LSB). Output Buffer The DAC voltage output is an internally buffered unity- gain follower that slews up to ±0.4V/µs. The output can swing from 0 to full scale. With a 1/4FS to 3/4FS output transition, the amplifier outputs typically settle to 1/2LSB in less than 5µs when loaded with 10kΩ in par- allel with 50pF. The buffer amplifiers are stable with any M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 _______________________________________________________________________________________ 7 Typical Operating Characteristics (continued) (VDD = +3.0V (MAX5383), VDD = +5.0V (MAX5384/MAX5385), TA = +25°C, unless otherwise noted.) 2µs/div MAX5383 OUTPUT SETTLING 1LSB STEP UP M A X 5 3 8 3 /4 /5 -2 2 OUT 20mV/div AC-COUPLED 0 x 7F TO 0 x 80 CS 3V/div MAX5383 OUTPUT SETTLING 1LSB STEP DOWN M A X 5 3 8 3 /4 /5 -2 3 OUT 20mV/div AC-COUPLED 2µs/div 0 x 80 TO 0 x 7F CS 3V/div Pin Description PIN NAME DESCRIPTION 1 OUT DAC Voltage Output 2 GND Ground 3 VDD Power-Supply Input 4 DIN Serial Data Input 5 SCLK Serial Clock Input 6 CS Chip-Select Input

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combination of resistive loads >10kΩ and capacitive loads <50pF. Power-On Reset The MAX5383/MAX5384/MAX5385 have a power-on reset circuit to set the DAC’s output to 0 when VDD is first applied or when VDD dips below 1.7V (typ). This ensures that unwanted DAC output voltages will not occur immediately following a system startup, such as after a loss of power. The output glitch on startup is typ- ically less than 50mV. Shutdown Mode The MAX5383/MAX5384/MAX5385 include three soft- ware-controlled shutdown modes that reduce the supply current to <1µA. All internal circuitry is disabled, and a known impedance is placed from OUT to GND to ensure 0V while in shutdown. Table 2 details the three shutdown modes of operation. Digital Section 3-Wire Serial Interface The MAX5383/MAX5384/MAX5385s’ digital interface is a standard 3-wire connection compatible with SPI/QSPI/MICROWIRE interfaces. The chip-select input (CS) frames the serial data loading at the data-input pin (DIN). Immediately following CS’s high-to-low transition, the data is shifted synchronously and latched into the input register on the rising edge of the serial clock input (SCLK). After 16 bits have been loaded into the serial M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 8 _______________________________________________________________________________________ REF CONTROL LOGIC DATA LATCH GND OUT VDD CURRENT-STEERING DAC SERIAL INPUT REGISTERSCLK DIN CS 255 8 MAX5383 MAX5384 MAX5385 Figure 1. Functional Diagram SW1 SW2 SW255 OUT VREF Figure 2. Current-Steering DAC Topology OUTPUT VOLTAGE DAC CODE [D11–D4] MAX5383 MAX5384 MAX5385 1111 1111 2V × (255/256) 4V × (255/256) 0.9 × VDD × (255/256) 1000 0000 1V 2V 0.9 × VDD / 2 0000 0001 7.8mV 15.6mV 0.9 × VDD / 256 0000 0000 0 0 0 Table 1. Unipolar Code Output Voltage

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input register, it transfers its contents to the DAC latch on CS’s low-to-high transition (Figure 3). Note that if CS is not kept low during the entire 16 SCLK cycles, data will be corrupted. In this case, reload the DAC latch with a new 16-bit word. The serial clock (SCLK) can idle either high or low between transitions. Figure 4 shows the complete 3-wire serial interface transmis- sion. Table 3 lists serial interface mapping. Applications Information Device Powered by an External Reference Since the MAX5385 generates an output voltage pro- portional to VDD, a noisy power supply will affect the accuracy of the on-board reference, thereby affecting the overall accuracy of the DAC. The circuit in Figure 5 rejects this power-supply noise by powering the device directly with a precision voltage reference, improving overall system accuracy. The MAX6103 (+3V, 75ppm) or the MAX6105 (+5V, 75ppm) precision voltage refer- ences are ideal choices due to the low power require- ments of the MAX5385. This solution is also useful when the required full-scale output voltage is different from the available supply voltages. Digital Inputs and Interface Logic The digital interface for the 8-bit DAC is based on a 3-wire standard that is compatible with SPI, QSPI, and MICROWIRE interfaces. The three digital inputs (CS, DIN, and SCLK) load the digital input serially into the DAC. All the digital inputs include Schmitt-trigger buffers to accept slow-transition interfaces. This means that opto- couplers can interface directly to the MAX5383/ MAX5384/MAX5385 without additional external logic. The digital inputs are compatible with CMOS logic levels and can be driven with voltages up to +5.5V regardless of the supply voltage. Power-Supply Bypassing and Layout Careful PC board layout is important for best system performance. To reduce crosstalk and noise injection, keep analog and digital signals separate. To ensure that the ground return from GND to the supply ground is short and low impedance, a ground plane is recom- mended. Bypass VDD with a 0.1µF capacitor to ground as close as possible to the device. If the supply is excessively noisy, connect a 10Ω resistor in series with the supply and VDD and add additional capacitance. M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 _______________________________________________________________________________________ 9 Table 3. Serial Interface Mapping X = Don’t care 16-BIT SERIAL WORD ANALOG MSB LSB OUTPUT FUNCTION XX00 0000 0000 XXXX 0V Normal operation XX00 1111 1111 XXXX VREF × (255/256) Normal operation XX00 0000 0001 XXXX VREF × (1/256) Normal operation XX00 1000 0000 XXXX VREF × (128/256) Normal operation XX01 XXXX XXXX XXXX 0V Shutdown, 1kΩ to GND XX10 XXXX XXXX XXXX 0V Shutdown, 100kΩ to GND XX11 XXXX XXXX XXXX 0V Shutdown, 1MΩ to GND Table 2. Shutdown Modes DAC CODE [D13 AND D12] MODE OUTPUT RESISTANCE TO GROUND (Ω) MAXIMUM SUPPLY CURRENT (µA) 01 Shutdown 1k 1 10 Shutdown 100k 1 11 Shutdown 1M 1

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Chip Information TRANSISTOR COUNT: 2160 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 10 ______________________________________________________________________________________ tCSO tCHtCSS tCL tDH tDS tCSH tCS1 CS SCLK DIN D15 D14 D0 Figure 3. 3-Wire Serial Interface Timing Diagram CS SCLK DIN D15 D8 D7 D6 D5 D4 D3 D2 D1 D0 DAC UPDATED D14 D13 D12 D11 D10 D9 Figure 4. Complete 3-Wire Serial Interface Transmission GND IN OUT GND VDD OUT SCLK DIN +3.2V TO +12V 0 TO +2.7V +3.00V CS MAX6103 MAX5385 0.1µF Figure 5. Powering the MAX5385 with a Precision Voltage Reference

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 ______________________________________________________________________________________ 11 6 L S O T .E P S PACKAGE OUTLINE, SOT 6L BODY 21-0058 2 1 I Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 6 SOT23 U6-4 21-0058 6 SOT23-Thin Z6-1 21-0114

Page 13

M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 12 ______________________________________________________________________________________ Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE OUTLINE, SOT 6L BODY 21-0058 2 2 I

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M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 ______________________________________________________________________________________ 13 6 L T H IN S O T 2 3 .E P S Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

Page 15

M A X 5 3 8 3 /M A X 5 3 8 4 /M A X 5 3 8 5 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 14 ______________________________________________________________________________________ Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

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