2.5V to +5.5V, 400A, 2-Wire Interface, Quad Voltage Output 12-Bit DAC

The AD5306 / AD5316 / AD5326 are quad 8-/10-/12-bit buffered voltage output DACs in 16-lead TSSOP packages that operate from a single 2.5 V to 5.5 V supply, consuming 500 μA at 3 V. Their on-chip output amplifiers allow rail-to-rail output swing with a slew rate of 0.7 V/μs. A 2-wire serial interface, which operates at clock rates up to 400 kHz, is used. This interface is SMBus-compatible at VDD < 3.6 V. Multiple devices can be placed on the same bus.

Each DAC has a separate reference input that can be configured as buffered or unbuffered. The outputs of all DACs can be updated simultaneously using the asynchronous LDAC input. The parts incorporate a power-on reset circuit that ensures the DAC outputs power up to 0 V and remain there until a valid write to the device takes place. The software clear function clears all DACs to 0 V. The parts contain a power-down feature that reduces the current consumption of the device to 300 nA @ 5 V (90 nA @ 3 V).

All three parts have the same pinout, which allows users to select the amount of resolution appropriate for their application without redesigning their circuit board.

PRODUCT HIGHLIGHTS

* Available in a 16-lead MicroSOIC package

* Low power, single supply operation from 2.5 V to 5.5 V supply

* Consumes 1.2mW at 3 V and 2.5 mW at 5 V

* Rail-to-Rail output with a slew rate of 0.7 V/µs

* Multiple devices can share the same bus

* 2-wire serial interface with clock rates up to 400 kHz

* Pin- and Software-Compatible with the AD5306 (8-Bit) and the AD5316 (10-Bit)

APPLICATIONS

* Portable battery-powered instruments

* Digital gain and offset adjustment

* Programmable voltage and current sources

* Programmable attenuator

* Industrial process control

* AD5306: 4 buffered, 8-bit DACs in 16-lead TSSOP

* A version: ±1 LSB INL; B version: ±0.625 LSB INL

* AD5316: 4 buffered, 10-bit DACs in 16-lead TSSOP

* AD5326: 4 buffered, 12-bit DACs in 16-lead TSSOP