ADS7888 - 2.35V-5.25V 8 位 1.25MSPS 串行 ADC

ADS7888是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS7888是2.35V-5.25V 8 位 1.25MSPS 串行 ADC，本站介绍了ADS7888的封装应用图解、特点和优点、功能等，并给出了与ADS7888相关的TI元器件型号供参考。

ADS7888 - 2.35V-5.25V 8 位 1.25MSPS 串行 ADC - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADS7887 is a 10-bit, 1.25-MSPS analog-to-digital converter (ADC), and the ADS7888 is a 8-bit, 1.25-MSPS ADC. The devices include a capacitor based SAR A/D converter with inherent sample and hold. The serial interface in each device is controlled by the CS and SCLK signals for glueless connections with microprocessors and DSPs. The input signal is sampled with the falling edge of CS, and SCLK is used for conversion and serial data output.

The devices operate from a wide supply range from 2.35 V to 5.25 V. The low power consumption of the devices make them suitable for battery-powered applications. The devices also include a power saving powerdown feature for when the devices are operated at lower conversion speeds.

The high level of the digital input to the device is not limited to device VDD. This means the digital input can go as high as 5.25 V when device supply is 2.35 V. This feature is useful when digital signals are coming from other circuit with different supply levels. Also this relaxes restriction on power up sequencing.

The ADS7887 and ADS7888 are available in 6-pin SOT23 and SC70 packages and are specified for operation from -40°C to 125°C.

产品特性

1.25-MHz Sample Rate Serial Device
10-Bit Resolution - ADS7887
8-Bit Resolution - ADS7888
Zero Latency
25-MHz Serial Interface
Supply Range: 2.35 V to 5.25 V
Typical Power Dissipation at 1.25 MSPS:
- 3.8 mW at 3-V VDD
- 8 mw at 5-V VDD
±0.35 LSB INL, DNL - ADS7887
±0.15 LSB INL, ±0.1 LSB DNL - ADS7888
61dB SINAD, -84 dB THD - ADSA7887
49.5 dB SINAD, -67.5 dB THD - ADS7888
Unipolar Input Range: 0 V to VDD
Power Down Current: 1 µA
Wide Input Bandwidth: 15 MHz at 3 dB
6-Pin SOT23 and SC70 Packages
APPLICATIONS
- Base Band Converters in Radio Communication
- Motor Current/Bus Voltage Sensors in Digital Drives
- Optical Networking (DWDM, MEMS Based Switching)
- Optical Sensors
- Battery Powered Systems
- Medical Instrumentations
- High-Speed Data Acquisition Systems
- High-Speed Closed-Loop Systems

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