描述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3-MHz Sample Rate Serial Device10-Bit Resolution ? ADS78848-Bit Resolution ? ADS7885Zero Latency48-MHz Serial Interface Supply Range: 2.7 V to 5.5 V Low Power Dissipation: 6.8 mW at 3-V VDD, 2.5 MSPS15 mw at 5-V VDD, 3 MSPS ±0.3 LSB INL, ±0.3 LSB DNL ? ADS7884±0.15 LSB INL, ±0.1 LSB DNL ? ADS788561.7 dB SINAD, -81 dB THD ? ADS788449.8 dB SINAD, -68 dB THD ? ADS7885Unipolar Input Range: 0 V to VDDPowerdown Current: 1 μAWide Input Bandwidth:30 MHz at 3 dB6-Pin SOT23Package APPLICATIONS Base Band Converters in Radio CommunicationMotor Current/Bus Voltage Sensors in Digital DrivesOptical Networking (DWDM, MEMS Based Switching)Optical SensorsBattery Powered SystemsMedical InstrumentationsHigh-Speed Data Acquisition SystemsHigh-Speed Closed-Loop Systems