DAC9881 - 单通道 18 位低噪声电压输出数模转换器

DAC9881是TI德州仪器公司的一款精密DAC(=<10MSPS)产品，DAC9881是单通道 18 位低噪声电压输出数模转换器，本站介绍了DAC9881的封装应用图解、特点和优点、功能等，并给出了与DAC9881相关的TI元器件型号供参考。

DAC9881 - 单通道 18 位低噪声电压输出数模转换器 - 精密DAC(=<10MSPS) - 数模转换器 - 德州仪器

产品描述

The DAC9881 is an 18-bit, single-channel, voltage-output digital-to-analog converter (DAC). It features 18-bit monotonicity, excellent linearity, very low-noise, and fast settling time. The on-chip precision output amplifier allows rail-to-rail output swing to be achieved over the full supply range of 2.7V to 5.5V.

The device supports a standard SPI serial interface capable of operating with input data clock frequencies up to 50MHz. The DAC9881 requires an external reference voltage to set the output range of the DAC channel. A programmable power-on reset circuit is also incorporated into the device to ensure that the DAC output powers up at zero-scale or midscale, and remains there until a valid write command.

Additionally, the DAC9881 has the capability to function in either unipolar straight binary or twos complement mode. The DAC9881 provides low-power operation. To further save energy, power-down mode can be achieved by accessing the PDN pin, thereby reducing the current consumption to 25µA at 5V. Power consumption is 4mW at 5V, reducing to 125µW in power-down mode.

The DAC9881 is available in a 4mm × 4mm QFN-24 package with a specified temperature range of -40°C to +105°C.

产品特性

18-Bit Monotonic Over Temperature Range
Relative Accuracy: ±2LSB Max
Low-Noise: 24nV/Hz
Fast Settling: 5µs
On-Chip Output Buffer Amplifier with Rail-to-Rail Operation
Single Power Supply: +2.7V to +5.5V
DAC Loading Control
Selectable Power-On Reset to Zero-Scale or Midscale
Power-Down Mode
Unipolar Straight Binary or Twos Complement Input Mode
Fast SPI Interface with Schmitt-Triggered Inputs: up to 50MHz, 1.8V/3V/5V Logic
Small Package: QFN-24, 4mm × 4mm
APPLICATIONS
- Automatic Test Equipment
- Precision Instrumentation
- Industrial Control
- Data Acquisition Systems

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