# AD7398/AD7399: Quad Voltage Output DACs

## Features

* **Resolution:** AD7398 (12-bit), AD7399 (10-bit)
* **Power:** Programmable power shutdown
* **Supply:** Single (3V - 5V) or dual (±5V) supply operation
* **Interface:** 3-wire, SPI-compatible serial interface
* **Reset:** Internal power-on reset
* **Registers:** Double buffered for simultaneous multichannel DAC updates
* **References:** Four rail-to-rail reference inputs
* **Package:** TSSOP-16 package available
* **Temperature Coefficient:** 1.5 ppm/°C
* **Automotive Qualification:** Qualified for automotive applications

## Applications

* Automotive output voltage span
* Portable communications
* Digitally controlled calibration
* PC peripherals

## Functional Description

* Quad voltage output DACs
* CBCMOS process
* Reference voltage (VREF) determines full-scale output
* Doubled-buffered serial data interface
* Load-DAC (LDAC) input for simultaneous updates
* Asynchronous reset (RS) forces registers to zero code state

## Specifications (AD7398 - 12-bit)

* **Resolution:** 12 bits
* **Relative Accuracy (INL):** ±1.5 LSB max
* **Differential Nonlinearity (DNL):** Monotonic ±1 LSB max
* **Zero-Scale Error:** 7 mV max
* **Full-Scale Voltage Error:** ±2.5 mV max
* **Full-Scale Tempco:** 1.5 ppm/°C
* **Reference Input Range:** VSS to VDD
* **Analog Output Range:** 0 to VREF
* **Maximum Output Current (IOUT):** ±5 mA
* **Maximum Capacitive Load (CL):** 200 pF

## Absolute Maximum Ratings

* **VDD to GND:** -0.3V to +7V
* **VSS to GND:** +0.3V to -7V
* **Reference Input Range:** VSS to VDD
* **Maximum Junction Temperature:** 150°C