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MAX5701：Ultra-Small, Dual-Channel, 8-/10-/12-Bit Buffered Output DACs with Internal Reference and SPI Interface

Feature-Rich, 2-Channel DAC Family with Internal Voltage Reference and SPI Interface

The MAX5700/MAX5701/MAX5702 2-channel, low-power, 8-/10-/12-bit, voltage-output digital-to-analog converters (DACs) include output buffers and an internal reference that is selectable to be 2.048V, 2.500V, or 4.096V. The MAX5700/MAX5701/MAX5702 accept a wide supply voltage range of 2.7V to 5.5V with extremely low power (1.5mW) consumption to accommodate most low-voltage applications. A precision external reference input allows rail-to-rail operation and presents a 100kΩ (typ) load to an external reference. The MAX5700/MAX5701/MAX5702 have an a 50MHz 3-wire SPI/QSPI™/MICROWIRE®/DSP-compatible serial interface. The DAC output is buffered and has a low supply current of less than 250µA (max) per channel and a low offset error of ±0.5mV (typ). On power-up, the MAX5700/MAX5701/MAX5702 reset the DAC outputs to zero, providing additional safety for applications that drive valves or other transducers which need to be off on power-up. The internal reference is initially powered down to allow use of an external reference. The MAX5700/MAX5701/MAX5702 allow simultaneous output updates using software LOAD commands. A clear logic input (active-low CLR) allows the contents of the CODE and the DAC registers to be cleared asynchronously and sets the DAC outputs to zero. The MAX5700/MAX5701/MAX5702 are available in a 10-pin µMAX® and an ultra-small, 10-pin TDFN package and are specified over the -40°C to +125°C temperature range.

Key Features Two High-Accuracy DAC Channels 12-Bit Accuracy Without Adjustment ±1 LSB INL Buffered Voltage Output Monotonic Over All Operating Conditions Independent Mode Settings for Each DAC Three Precision Selectable Internal References 2.048V, 2.500V, or 4.096V Internal Output Buffer Rail-to-Rail Operation with External Reference 4.5µs Settling Time Outputs Directly Drive 2kΩ Loads Small 5mm x 3mm 10-Pin µMAX or Ultra-Small 3mm x 3mm 10-Pin TDFN Package Wide 2.7V to 5.5V Supply Range Separate 1.8V to 5.5V VDDIO Power-Supply Input 50MHz 3-Wire SPI/QSPI/MICROWIRE/DSP-Compatible Serial Interface Power-On-Reset to Zero-Scale DAC Output Active-Low CLR For Asynchronous Control Three Software-Selectable Power-Down Output Impedances 1kΩ, 100kΩ, or High Impedance Low 330µA Supply Current at 3V VDD

MAX5700, MAX5701, MAX5702: Typical Operating Circuits Applications/Uses Automatic Tuning and Optical Control Data Acquisition Gain and Offset Adjustment Portable Instrumentation Power Amplifier Control and Biasing Process Control and Servo Loops Programmable Voltage and Current Sources

DataSheet

Parametrics

Design kits & evaluation modules

• MAX5X02EVKIT

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