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MAX5805：Ultra-Small, Single-Channel, 8-/10-/12-Bit Buffered Output Voltage DACs with Internal Reference and I2C Interface

Feature-Rich, 1-Channel DAC Family

The MAX5803/MAX5804/MAX5805 single-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 MAX5803/MAX5804/MAX5805 accept a wide supply voltage range of 2.7V to 5.5V with extremely low power (< 1mW) 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 MAX5803/MAX5804/MAX5805 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 155µA (typical at 3V) and a low offset error of ±0.5mV (typical). On power-up, the MAX5803/MAX5804/MAX5805 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 MAX5803/MAX5804/MAX5805 include a user-configurable active-low asynchronous input, active-low AUX for additional flexibility. This input can be programmed to asynchronously clear (active-low CLR) or temporarily gate (active-low GATE) the DAC output to a user-programmable value. A dedicated active-low asynchronous LDAC input is also included. This allows simultaneous output updates of multiple devices. The MAX5803/MAX5804/MAX5805 are available in 10-pin TDFN/µMAX® packages and are specified over the -40°C to +125°C temperature range.

Key Features Single High-Accuracy DAC Channel 12-Bit Accuracy Without Adjustments ±1 LSB INL Buffered Voltage Output Guaranteed Monotonic Over All Operating Conditions Three Precision Selectable Internal References 2.048V, 2.500V, or 4.096V Internal Output Buffer Rail-to-Rail Operation with External Reference 6.3µs Settling Time Output Directly Drives 2kΩ Loads Small, 10-Pin, 2mm x 3mm TDFN and 3mm x 5mm µMAX Packages Wide 2.7V to 5.5V Supply Range Flexible 1.8V to 5.5V VDDIO Fast 400kHz, I2C-Compatible, 2-Wire Serial Interface with Readback Power-On-Reset to Zero-Scale DAC Output User-Configurable Asynchronous I/O Functions: Active-Low CLR, Active-Low LDAC, Active-Low GATE Three Software-Selectable Power-Down Output Impedances: 1kΩ, 100kΩ, or High Impedance Low 155µA DAC Supply Current at 3V

MAX5803, MAX5804, MAX5805: Functional Diagram 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

• MAX5X05EVKIT

Quality and Environmental Data

• MAX5805.pdf

Ordering Information