ADS7891是TI公司的一款精密ADC(<=10MSPS)产品，ADS7891是具有 Ref 引脚的 2.7V-5.25V 数字 5V 模拟 14 位 3MSP 并行 ADC，本页介绍了ADS7891的产品说明、应用、特性等，并给出了与ADS7891相关的TI元器件型号供参考。
ADS7891 - 具有 Ref 引脚的 2.7V-5.25V 数字 5V 模拟 14 位 3MSP 并行 ADC - 精密ADC(<=10MSPS) - 模数转换器 - TI公司（Texas Instruments，德州仪器）
The ADS7891 is a 14-bit 3-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit parallel interface with an additional byte mode that provides easy interface with 8-bit processors. The device has a pseudo-differential input stage.
The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. With nap mode enabled, the device operates at lower power when used at lower conversion rates. The device is available in a 48-pin TQFP package.
- 3 MHz Sample Rate, 14-Bit Resolution
- Zero Latency
- Unipolar, Pseudo Differential Input, Range:
- 0 V to 2.5 V
- High Speed Parallel Interface
- 78 dB SNR and 88.5 dB THD at 3 MSPS
- Power Dissipation 85 mW at 3 MSPS
- Nap Mode (10 mW Power Dissipation)
- Power Down (10 µW)
- Internal Reference
- Internal Reference Buffer
- 8-/14-Bit Bus Transfer
- 48-Pin TQFP Package
- APPLICATIONS
- Optical Networking (DWDM, MEMS Based Switching)
- Spectrum Analyzers
- High Speed Data Acquisition Systems
- High Speed Close-Loop Systems
- Telecommunication
- Ultra-Sound Detection
