DAC7553IRGTRG4

数模转换器- DAC 12-Bit Dual UltrLo Glitch Vltg Output

DESCRIPON

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-kΩ, 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.

FEATURES

• 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