Document
19-2330; Rev 0; 1/02
Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs
General Description
The MAX5234/MAX5235 precision, dual-output, 12-bit digital-to-analog converters (DACs) consume only 360µA from a single 5V (MAX5235) or 325µA from a single 3V (MAX5234) supply. These devices feature output buffers that swing Rail-to-Rail®. The internal gain amplifiers maximize the dynamic range of the DAC output. The MAX5234/MAX5235 feature a 13.5MHz 3-wire serial interface compatible with SPI™, QSPI™, and MICROWIRE™. Each DAC input is organized as an input register followed by a DAC register. A 16-bit shift register loads data into the input registers. Input registers update the DAC registers independently or simultaneously. In addition, programmable control bits allow power-down with 1kΩ or 200kΩ internal loads. The MAX5234/MAX5235 are fully specified over the extended industrial temperature range (-40°C to +85°C) and are available in space-saving 10-pin µMAX packages. o Guaranteed 1/2LSB INL (max) o Low Supply Current 325µA (Normal Operation) 0.4µA (Full Power-Down Mode) o Single-Supply Operation 3V (MAX5234) 5V (MAX5235) o Space-Saving 10-Pin µMAX Package o Output Buffers Swing Rail-to-Rail o Power-On Reset Clears Registers and DACs to Zero o Programmable Shutdown Modes with 1kΩ or 200kΩ Internal Loads o Resets to Zero o 13.5MHz SPI/QSPI/MICROWIRE-Compatible, 3-Wire Serial Interface o Buffered Output Drives 5kΩ || 100pF
Features
MAX5234/MAX5235
Applications
Industrial Process Controls Automatic Test Equipment Digital Offset and Gain Adjustment Motion Control µP-Controlled Systems
Ordering Information
PART MAX5234AEUB MAX5234BEUB MAX5235AEUB MAX5235BEUB TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 10 µMAX 10 µMAX 10 µMAX 10 µMAX INL (LSB) ±0.5 ±1 ±0.5 ±1
Pin Configuration
TOP VIEW
OUTA 1 REFA GND LDAC 2 3 4 5 10 OUTB 9 REFB VDD DIN SCLK
MAX5234 MAX5235
8 7 6
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
CS
µMAX
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs MAX5234/MAX5235
ABSOLUTE MAXIMUM RATINGS
VDD to GND .............................................................-0.3V to +6V Digital Inputs to GND ..............................................-0.3V to +6V REF_, OUT_ to GND ................................-0.3V to (VDD + 0.3V) Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 10-Pin µMAX (derate 5.60mW/°C above +70°C) .........444mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°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.
ELECTRICAL CHARACTERISTICS—MAX5235
(VDD = +4.5V to +5.5V, GND = 0, VREFA = VREFB = +2.5V, RL= 5kΩ, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER STATIC PERFORMANCE Resolution Integral Nonlinearity Differential Nonlinearity Offset Error Gain Error Full-Scale Voltage Full-Scale Temperature Coefficient Offset Temperature Coefficient Power-Supply Rejection DC Crosstalk REFERENCE INPUT Reference Input Range Reference Input Resistance Reference Current in Shutdown Reference -3dB Bandwidth, Slew-Rate Limited Reference Feedthrough Signal-to-Noise plus Distortion Ratio SINAD VREF RREF IREF Input code = FFF hex, VREF_ = 0.5VP-P + 1.5VDC Input code = 000 hex, VREF_ = 3.6VP-P + 1.8VDC, f = 1kHz Input code = FFF hex, VREF_ = 2VP-P + 1.5VDC, f = 10kHz (Note 5) Minimum with code 555 hex and AAA hex 0.25 28 37 ±1 2.60 V kΩ µA VFS TCVFS TCVOS PSR 4.5V ≤ VDD ≤ 5.5V (Note 4) Code = FFF hex, TA = +25°C (Note 3) Normalized to 4.095V 4.087 4.095 2 ±8 15 200 100 N INL DNL VOS (Note 2) MAX5235A (Note 1) MAX5235B (Note 1) 12 ±0.5 ±1 ±1 ±5 ±3 4.103 Bits LSB LSB mV LSB V ppm/°C µV/°C µV µV SYMBOL CONDITIONS MIN TYP MAX UNITS
MULTIPLYING MODE PERFORMANCE 350 -80 79 kHz dB dB
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Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs
ELECTRICAL CHARACTERISTICS—MAX5235 (continued)
(VDD = +4.5V to +5.5V, GND = 0, VREFA = VREFB = +2.5V, RL= 5kΩ, CL = 100pF, T.