ADS7885| Datasheet

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Burr Brown Products from Texas Instruments

ADS7884 ADS7885
SLAS567 MARCH 2008

10-/8-BIT, 3-MSPS, MICRO-POWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTERS
1

FEATURES
3-MHz Sample Rate Serial Device 10-Bit Resolution ADS7884 8-Bit Resolution ADS7885 Zero Latency 48-MHz Serial Interface Supply Range: 2.7 V to 5.5 V Low Power Dissipation: 6.8 mW at 3-V VDD, 2.5 MSPS 15 mw at 5-V VDD, 3 MSPS 0.3 LSB INL, 0.3 LSB DNL ADS7884 0.15 LSB INL, 0.1 LSB DNL ADS7885 61.7 dB SINAD, 81 dB THD ADS7884 49.8 dB SINAD, 68 dB THD ADS7885 Unipolar Input Range: 0 V to VDD Powerdown Current: 1 uA Wide Input Bandwidth: 30 MHz at 3 dB 6-Pin SOT23 Package

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

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 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 2.7 V to 5.5 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 5.5 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 powe
r up sequencing. The ADS7884 and ADS7885 are available in a 6-pin SOT23 package and are specified for operation from 40 C to 125 C. Micro-Power Miniature SAR Converter Family
BIT 12-Bit 10-Bit 8-Bit < 300 KSPS ADS7866 (1.2 VDD to 3.6 VDD) ADS7867 (1.2 VDD to 3.6 VDD) ADS7868 (1.2 VDD to 3.6 VDD) 300 KSPS 1.25 MSPS ADS7886 (2.35 VDD to 5.25 VDD) ADS7887 (2.35 VDD to 5.25 VDD) ADS7888 (2.35 VDD to 5.25 VDD) -- ADS7884 (2.7 VDD to 5.5 VDD) ADS7885 (2.7 VDD to 5.5 VDD) 3 MSPS

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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.