DAC 2-CH Resistor-String 12-bit 16-Pin VQFN EP T/R

The DAC7553 is a 12-bit, dual-channel, voltage-output DAC with exceptional linearity and monotonicity. Its proprietary architecture minimizes undesired transients such as code-to-code glitch and channel-to-channel crosstalk. The low-power DAC7553 operates from a single 2.7-V to 5.5-V supply. The DAC7553 output amplifiers can drive a 2-kO, 200-pF load rail-to-rail with 5-µs settling time; the output range is set using an external voltage reference. The 3-wire serial interface operates at clock rates up to 50 MHz and is compatible with SPI, QSPI, Microwire, and DSP interface standards. The outputs of all DACs may be updated simultaneously or sequentially. The parts incorporate a power-on-reset circuit to ensure that the DAC outputs power up at midscale and remain there until a valid write cycle to the device takes place. The parts contain a power-down feature that reduces the current consumption of the device to under 2 µA. The small size and low-power operation makes the DAC7553 ideally suited for battery-operated portable applications. The power consumption is typically 1.5 mW at 5 V, 0.75 mW at 3 V, and reduces to 1 µW in power-down mode. The DAC7553 is available in a 16-lead QFN package and is specified over -40°C to 105°C.

2.7-V to 5.5-V Single Supply

12-Bit Linearity and Monotonicity

Rail-to-Rail Voltage Output

Settling Time: 5 µs (Max)

Ultralow Glitch Energy: 0.1 nVs

Ultralow Crosstalk: -100 dB

Low Power: 440 µA (Max)

Per-Channel Power Down: 2 µA (Max)

Power-On Reset to Midscale

2s Complement Input Data Format

SPI-Compatible Serial Interface: Up to 50 MHz

Daisy-Chain Capability

Asynchronous Hardware Clear

Simultaneous or Sequential Update

Specified Temperature Range: -40°C to 105°C

Small 3-mm × 3-mm, 16-Lead QFN Package

APPLICATIONS

• Portable Battery-Powered Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Programmable Attenuators
• Industrial Process Control