12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23 MAX57
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12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23
MAX5712 small footprint, low-power, 12-bit digital-to-analog converter (DAC) that operates from single +2.7V +5.5V supply. MAX5712 on-chip precision output amplifier provides Rail-to-Rail® output swing. Drawing only 85µA supply current +3V, MAX5712 ideally suited portable battery-operated equipment. MAX5712 utilizes 3-wire serial-interface that compatible with SPITM/QSPITM/MICROWIREand DSP-interface standards. logic inputs CMOS-logic compatible buffered with Schmitt triggers allow direct interfacing optocouplers. MAX5712 incorporates power-on reset (POR) circuit that ensures begins zero-volt-state upon power-up. power-down mode that reduces current consumption 0.3µA initiated through software command. MAX5712 available small 6-pin SOT23 package. dual quad 12-bit versions, MAX5722 MAX5742 data sheets. single, dual, quad 10-bit versions, MAX5711, MAX5721 MAX5741 data sheets. MAX5712 specified over automotive temperature range -40°C +125°C.
Features
Wide -40°C +125°C Operating Temperature Range 85µA Supply Current Ultra 0.3µA Power-Down Supply Current Single +2.7V +5.5V Supply Voltage Fast 20MHz 3-Wire SPI/QSPI/MICROWIRE DSP-Compatible Serial Interface Schmitt-Triggered Inputs Direct Interfacing Optocouplers Rail-to-Rail Output Buffer Tiny 6-Pin SOT23 Package Power-On Reset Three Software-Selectable Power-Down Output Impedances (100k, Hi-Z)
MAX5712
Ordering Information
PART MAX5712EUT MAX5712AUT TEMP RANGE -40°C +85°C -40°C +125°C PINPACKAGE SOT23 SOT23 MARK ABCQ AAUD
Applications
Automatic Tuning Gain Offset Adjustment Power Amplifier Control Process Control Boards Battery-Powered Equipment Control
Configuration appears data sheet. Rail-to-Rail registered trademark Nippon Motorola, Ltd. QSPI trademarks Motorola, Inc. MICROWIRE trademark National Semiconductor, Corp.
Functional Diagram
REF+ REFDAC REGISTER 12-BIT OUTPUT BUFFER 100k INPUT CONTROL LOGIC POWER-DOWN CONTROL LOGIC
MAX5712
POWER-ON RESET SCLK
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23 MAX5712
ABSOLUTE MAXIMUM RATINGS
.-0.3V OUT, SCLK, DIN, .-0.3V (VDD+ 0.3V) Maximum Current into .±50mA Continuous Power Dissipation +70°C) 6-Pin SOT23 (derate 9.1mW/°C above +70°C).727mW Operating Temperature Range .-40°C +125°C Maximum Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD +2.7V +5.5V, 200pF, TMIN TMAX, unless otherwise noted. Typical values +5V. +25°C)
PARAMETER STATIC ACCURACY (NOTE Resolution Differential Nonlinearity Error Integral Nonlinearity Error Zero-Code Error Zero-Code Error Tempco Gain Error Gain-Error Tempco OUTPUT Output Voltage Range Output Impedance Short Circuit Current Wake-Up Time Output Leakage Current DIGITAL INPUTS (SCLK, DIN, Input High Voltage Input Voltage Input Leakage Current Input Capacitance DYNAMIC PERFORMANCE Voltage-Output Slew Rate Voltage-Output Settling Time Digital Feedthrough Digital-Analog Glitch Impulse (Note digital inputs from Major carry transition (code code hex) V/µs nV-s nV-s +3V, +3V, Digital Inputs ±0.1 No-load (Note Code Power-down mode output high-impedance Code Integral 0.26 Guaranteed monotonic (Note (Note Code Bits ppm/°C ppm/°C SYMBOL CONDITIONS UNITS
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23
ELECTRICAL CHARACTERISTICS (continued)
(VDD +2.7V +5.5V, 200pF, TMIN TMAX, unless otherwise noted. Typical values +5V. +25°C)
PARAMETER POWER REQUIREMENTS Supply Voltage Range Supply Current with No-Load Power-Down Supply Current SCLK Clock Frequency SCLK Pulse Width High SCLK Pulse Width Fall-to-SLCK Rise Setup Setup Time Hold Time SCLK Falling Edge-to-CS Rising Edge Pulse Width High IDDPD fSCLK tCSS tCSH tCSW digital inputs VDD, +3.6V digital inputs VDD, +5.5V digital inputs VDD, +5.5V 0.29 SYMBOL CONDITIONS UNITS
MAX5712
TIMING CHARACTERISTICS (FIGURE (TIMING TESTED WITH NO-LOAD)
Note Note Note Note
Specifications tested without output loads. Linearity guaranteed from code code 3981. Offset gain error limit FSR. Guaranteed design.
Typical Operating Characteristics
+25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY CODE, +25°C
MAX5712 toc01
DIFFERENTIAL NONLINEARITY CODE, +25°C
MAX5712 toc02
TOTAL UNADJUSTED ERROR CODE, +25°C
-0.2 -0.4 -0.6 -0.8 -1.0 1024 1536 2048 2560 3072 3584 4096 CODE
MAX5712 toc03
(LSB)
(LSB) -0.2 -0.4 -0.6 -0.8 -1.0
1024 1536 2048 2560 3072 3584 4096 CODE
1024 1536 2048 2560 3072 3584 4096 CODE
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23 MAX5712
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY CODE, -40°C
MAX5712 toc04
DIFFERENTIAL NONLINEARITY CODE, -40°C
MAX5712 toc05
TOTAL UNADJUSTED ERROR CODE, -40°C
-0.2 -0.4 -0.6 -0.8 -1.0 1024 1536 2048 2560 3072 3584 4096 CODE
MAX5712 toc06
(LSB)
(LSB) -0.2 -0.4 -0.6 -0.8 -1.0
1024 1536 2048 2560 3072 3584 4096 CODE
1024 1536 2048 2560 3072 3584 4096 CODE
INTEGRAL NONLINEARITY CODE, +125°C
MAX5712 toc07
DIFFERENTIAL NONLINEARITY CODE, +125°C
MAX5712 toc08
TOTAL UNADJUSTED ERROR CODE, +125°C
-0.2 -0.4 -0.6 -0.8 -1.0 1024 1536 2048 2560 3072 3584 4096 CODE
MAX5712 toc09
(LSB)
(LSB) -0.2 -0.4 -0.6 -0.8 -1.0
1024 1536 2048 2560 3072 3584 4096 CODE
1024 1536 2048 2560 3072 3584 4096 CODE
WORST CASE TEMPERATURE
MAX5712 toc10
SOURCE-AND-SINK CURRENT CAPABILITY (VDD +3V)
MAX5712 toc11
SOURCE-AND-SINK CURRENT CAPABILITY (VDD +5V)
VOUT CODE HEX, SOURCING CURRENT FROM
MAX5712 toc12
INL/DNL (LSB) MAXIMUM MINIMUM TEMPERATURE (°C) MINIMUM MAXIMUM
VOUT CODE HEX, SOURCING CURRENT FROM
CODE HEX, SOURCING CURRENT FROM
CODE HEX, SINKING CURRENT INTO
CODE HEX, SOURCING CURRENT FROM CODE HEX, SINKING CURRENT INTO CODE HEX, SINKING CURRENT INTO
CODE HEX, SINKING CURRENT INTO
ISOURCE/SINK (mA)
ISOURCE/SINK (mA)
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
SUPPLY CURRENT SUPPLY VOLTAGE
MAX5712 toc13
MAX5712
POWER-DOWN SUPPLY CURRENT SUPPLY VOLTAGE
MAX5712 toc14
SUPPLY CURRENT INPUT VOLTAGE
SUPPLY CURRENT (µA)
MAX5712 toc15
CODE SUPPLY CURRENT (µA) CODE SUPPLY VOLTAGE
POWER-DOWN SUPPLY CURRENT (nA)
SUPPLY VOLTAGE INPUT VOLTAGE
FULL-SCALE SETTLING TIME (VDD +5V)
MAX5712 toc16
FULL-SCALE SETTLING TIME (VDD +5V)
VSCLK 5V/div
MAX5712 toc17
HALF-SCALE SETTLING TIME (VDD +3V)
VSCLK 5V/div
MAX5712 toc18
VSCLK 5V/div
VOUT 1V/div VOUT 1V/div CODE 200pF 1µs/div CODE 200pF 1µs/div
VOUT 1V/div
CODE 200pF 2µs/div
HALF-SCALE SETTLING TIME (VDD +3V)
MAX5712 toc19
EXITING POWER-DOWN (VDD +5V)
VSCLK 5V/div
DIGITAL-TO-ANALOG GLITCH IMPULSE (VDD +5V)
MAX5712 toc20
MAX5712 toc21
VSCLK 5V/div
CODE VOUT 1V/div CODE 200pF 1µs/div 5µs/div
VOUT 10mV/div VOUT CODE 200pF 500ns/div
1V/div 200pF
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23 MAX5712
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
DIGITAL-TO-ANALOG GLITCH IMPULSE (VDD +5V)
MAX5712 toc22
CLOCK FEEDTHROUGH (VDD +5V)
MAX5712 toc23
VSCLK 2V/div
VOUT 10mV/div CODE 200pF 500ns/div 500ns/div VOUT 1mV/div 200pF
Description
NAME SCLK Power-Supply Input Ground Serial-Data Input Serial-Clock Input Active Chip-Select Input Output Voltage FUNCTION
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23
Detailed Description
MAX5712 voltage output, 12-bit DAC, offers full 12-bit performance small 6-pin SOT23 package. SOT23 footprint less than 9mm2. MAX5712 less than 1LSB differential nonlinearity error, ensuring monotonic performance. device uses simple 3-wire, SPI/QSPI/MICROWIRE DSP-compatible serial interface that operates 20MHz. MAX5712 incorporates three shutdown modes, making ideal low-power. down upon wake-up, output restored pre-power-down voltage. Power-On Reset MAX5712 circuit DACs output zero when first applied. This ensures that unwanted output voltages will occur immediately following system start-up, such after loss power. Upon initial power-up, internal power-onreset circuit ensures that registers cleared, powered-down, output terminated 100k resistor. recovery time after issuing wake-up command needed before writing registers.
MAX5712
Analog Section
MAX5712 consists resistor string, output buffer, circuit. Monotonic digital analog conversion achieved using resistor string architecture. Since reference MAX5712, accuracy depends accuracy VDD. bias current MAX5712 allows power supplied voltage reference such MAX6030. 12-bit code binary-unipolar with 1LSB VDD/4096. Output Buffer output buffer rail-to-rail output capable driving resistive load parallel with 200pF capacitive load. With capacitive load 200pF, output buffer slews 0.5V/µs. With 1/4FS 3/4FS output transition, amplifier output settles 1/2LSB less than 10µs when loaded with parallel with 200pF. buffer amplifier stable with combination resistive loads greater than capacitive loads less than 200pF. Program input register bits power-down device. registers preserved during power-
Digital Section
3-Wire Serial Interface
MAX5712 digital interface standard 3-wire connection compatible with SPI/QSPI/MICROWIRE/DSP interfaces. chip-select input (CS) frames serial data loading DIN. Immediately following high-tolow transition, data shifted synchronously latched into input register falling edge serial clock input (SCLK). After bits have been loaded into serial input register, transfers contents latch. then either held brought high. must brought high minimum 80ns before next write sequence, since write sequence initiated falling edge keeping during first SCLK cycles discards input data. serial clock (SCLK) idle either high between transitions. Figure shows complete 3-wire serial interface transmission. Table lists serial-interface mapping.
tCSW tCSS tCSH
Figure Timing Diagram
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23 MAX5712
Table Serial Interface Mapping
16-BIT SERIAL WORD 12-Bit Code update Wake-Up Power-Down Power-Down Power-Down VOUT CODE/4096 Current setting (initially Floating 100k MODE OUTPUT
Shutdown Modes
MAX5712 includes three software-controlled shutdown modes that reduce supply current below 1µA. three shutdown modes, connected through resistor. Table lists three shutdown modes operation.
Digital Inputs Interface Logic
3-wire digital interface MAX5712 compatible with SPI, QSPI, MICROWIRE, DSP. three digital inputs (CS, DIN, SCLK) load digital input serially into DAC. digital inputs include Schmitt-trigger buffers accept slow-transition interfaces. This allows optocouplers interface directly MAX5712 without additional external logic. digital inputs compatible with CMOS-logic levels.
Applications Information
Device Powered External Reference
MAX5712 generates output voltage proportional VDD, coupling power supply noise output. circuit Figure rejects this power-supply noise powering device directly with precision voltage reference, improving overall system accuracy. MAX6030 (+3V, 75ppm) MAX6050 (+5V, 75ppm) precision voltage references ideal choices low-power requirements MAX5712. This solution also useful when required full-scale output voltage less than available supply voltages.
Power-Supply Bypassing Layout
Careful board layout important optimal system performance. Keep analog digital signals separate reduce noise injection digital feedthrough. ground plane ensure that ground return from supply ground short impedance. Bypass with 0.1µF capacitor ground close possible device.
Configuration
VIEW
MAX6050 MAX6030 MAX5712
MAX5712
SCLK
SOT23
Chip Information
Figure MAX5712 Powered Reference
TRANSISTOR COUNT: 3856 PROCESS: BiCMOS
12-Bit, Low-Power, Rail-to-Rail Voltage-Output Serial SOT23
Package Information
6LSOT.EPS
MAX5712
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.
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