MAX5802BAUB+

The MAX5800/MAX5801/MAX5802 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 MAX5800/MAX5801/MAX5802 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 MAX5800/MAX5801/MAX5802 have an I²C-compatible, 2-wire interface that operates at clock rates up to 400kHz. The DAC output is buffered and has a low supply current of less than 250μA per channel and a low offset error of ±0.5mV (typ). On power-up, the MAX5800/ MAX5801/MAX5802 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 MAX5800/MAX5801/ MAX5802 allow simultaneous output updates using software LOAD commands. A clear logic input (CLR) allows the contents of the CODE and the DAC registers to be cleared asynchronously and sets the DAC outputs to zero. The MAX5800/MAX5801/ MAX5802 are available in a small 10-pin μMAX and an ultra-small, 10-pin TDFN package and are specified over the -40°C to +125°C temperature range.

Applications

• Programmable Voltage and Current Sources
• Gain and Offset Adjustment
• Automatic Tuning and Optical Control
• Power Amplifier Control and Biasing
• Process Control and Servo Loops
• Portable Instrumentation
• Data Acquisition

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
• Fast 400kHz I²C-Compatible, 2-Wire Serial Interface
• Power-On-Reset to Zero-Scale DAC Output
• CLR For Asynchronous Control
• Three Software-Selectable Power-Down Output Impedances
• 1kΩ, 100kΩ, or High Impedance
• Low 350μA Supply Current at 3V VDD