14-/16-Bit, Low-Power, Buffered Rail-to-Rail DACs with I²C Interface

The MAX5215/MAX5217 are pin-compatible 14-bit and 16-bit digital-to-analog converters (DACs). The MAX5215/MAX5217 are single-channel, low-powered, buffered voltage-output DACs. The devices use a precision external reference applied through the high resistance input for rail-to-rail operation and low system power consumption. The MAX5215/MAX5217 accept a wide 2.7V to 5.5V supply voltage range. Power consumption is extremely low to accommodate most low-power and low-voltage applications.

The MAX5215/MAX5217 have an I²C-compatible, 2-wire serial interface that operates at clock rates up to 400kHz. On power-up, the MAX5215/MAX5217 reset the DAC output to zero, providing additional safety for applications that drive valves or other transducers that need to be off on power-up. The DAC output is buffered resulting in a low supply current of 80µA (max) and a low offset error of ±0.25mV. An asynchronous active-low input, AUX, is provided. This input can be programmed to support clear or load DAC operations, independent of the serial interface. The MAX5215/MAX5217 are available in an ultra-small (3mm x 5mm), 8-pin µMAX® package and are specified over the -40°C to +105°C extended industrial temperature range.

Applications

* Automatic Test Equipment * Automatic Tuning * Communication Systems * Data Acquisition * Gain and Offset Adjustment * Portable Instrumentation * Power Amplifier Control * Process Control and Servo Loops * Programmable Voltage and Current Sources * Remote Sensing

* Low-Power Consumption (80µA, max)

* 18µs Settling Time

* 16-/14-Bit Resolution in a 3mm x 5mm, 8-Pin µMAX Package

* Relative Accuracy

* ±0.4 LSB INL (MAX5215, 14 Bit) typ, 1 LSB (max)

* ±1.2 LSB INL (MAX5217, 16 Bit) typ, 4 LSB (max)

* Guaranteed Monotonic Over All Operating Range

* Low Gain and Offset Error

* Wide 2.7V to 5.5V Supply Range

* Rail-to-Rail Buffered Output Operation

* Safe Power-Up-Reset to Zero DAC Output

* I²C-Compatible 400kHz Serial Interface

* User-Programmable Active-Low AUX Input Functions

* Active-Low CLR, Clear to 0, Midscale, or Full Scale

* Active-Low LDAC, Asynchronous Load DAC

* 256kΩ Reference Input Resistance for Low Power Operation

* Buffered Voltage Output Directly Drives 10kΩ Loads

* Output Power-Down Terminated with 1kΩ or 100kΩ to Ground or Left High-Impedance