ADS7885中文资料2.7V-5.5V 8 位 3MSPS 串行 ADC数据手册TI规格书

描述 Description

The ADS7884 is a 10-bit, 3-MSPS analog-to-digital converter (ADC), and the ADS7885 is a 8-bit, 3-MSPS ADC. The devices include a capacitor based SAR A/D converter with inherent sample and hold. The serial interface in each device iscontrolled by theCSand 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 devicesoperate from awide supply range from 2.7 V to 5.5 V. The low power consumption of the devices make them suitable for battery-powered applications.The devices also includea 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 5.5 V when device supply is 2.7 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 ADS7884 and ADS7885 are available in a 6-pin SOT23package and are specified for operation from -40°C to 125°C.

特性 Features

• 3-MHz Sample Rate Serial Device
• 8-Bit Resolution — ADS7885
• 48-MHz Serial Interface
• Low Power Dissipation:
• 15 mw at 5-V VDD, 3 MSPS
• ±0.15 LSB INL, ±0.1 LSB DNL — ADS7885
• 49.8 dB SINAD, -68 dB THD — ADS7885
• Powerdown Current: 1 µA
• 6-Pin SOT23Package
• Motor Current/Bus Voltage Sensors in Digital Drives
• Optical Sensors
• Medical Instrumentations
• High-Speed Closed-Loop Systems