AD5326BRUZ

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.

Applications

• Portable battery-powered instruments
• Digital gain and offset adjustment
• Programmable voltage and current sources
• Programmable attenuators
• Industrial process control

Key features

• 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
• A version: ±4 LSB INL; B version: ±2.5 LSB INL
• AD5326: 4 buffered, 12-bit DACs in 16-lead TSSOP
• A version: ±6 LSB INL; B version: ±10 LSB INL
• Low power operation: 400 μA @ 3 V, 500 μA @ 5 V
• 2-wire (I²C-compatible) serial interface
• 2.5 V to 5.5 V power supply
• Guaranteed monotonic by design over all codes
• Power-down to 90 nA @ 3 V, 300 nA @ 5 V (PD pin or bit)
• Double-buffered input logic
• Buffered/unbuffered reference input options
• Output range: 0 V to VREF or 0 V to 2 VREF
• Power-on reset to 0 V
• Simultaneous update of outputs (LDAC pin)
• Software clear facility
• Data readback facility
• On-chip rail-to-rail output buffer amplifiers
• Temperature range -40°C to +105°C