ADS7883_14 Datasheet, PDF (1/20 Pages) Texas Instruments – 12-BIT, 3-MSPS, MICROPOWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTER

ADS7883
www.ti.com ....................................................................................................................................................................................................... SLAS594 – JULY 2008
12-BIT, 3-MSPS, MICROPOWER, MINIATURE
SAR ANALOG-TO-DIGITAL CONVERTER
FEATURES
1
• 3-MHz Sample Rate Serial Device
• 12-Bit Resolution
• Zero Latency
• 48-MHz Serial Interface
• Supply Range: 2.7 V to 5.5 V
• Low Power Dissipation:
– 6.45 mW at 3-V V_DD, 2 MSPS
– 13.5 mw at 5-V V_DD, 3 MSPS
• ±0.6 LSB INL, ±0.5 LSB DNL
• 72 dB SINAD, –84 dB THD
• Unipolar Input Range: 0 V to V_DD
• Power-Down Current: 1 µA
• 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 ADS7883 is a 12-bit, 3-MSPS analog-to-digital converter (ADC). The device includes a capacitor based SAR
A/D converter with inherent sample and hold. The serial interface in the 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 device operates from a wide supply range from 2.7 V to 5.5 V. The low power consumption of the device
makes it suitable for battery-powered applications. The device also includes a power saving power-down feature
for when the device is operated at lower conversion speeds.
The high level of the digital input to the device is not limited to device V_DD. Therefore the digital input can go as
high as 5.5 V when the device supply is 2.7 V. This feature is useful when digital signals are received from
another circuit with different supply levels. This also reduces restrictions on power-up sequencing.
The ADS7883 is available in a 6-pin SOT23 package and is specified for operation from –40°C to 125°C.
BIT
12-Bit
10-Bit
8-Bit
MicroPower Miniature SAR Converter Family
< 300 KSPS
ADS7866 (1.2 V_DD to 3.6 V_DD)
ADS7867 (1.2 V_DD to 3.6 V_DD)
ADS7868 (1.2 V_DD to 3.6 V_DD)
300 KSPS – 1.25 MSPS
ADS7886 (2.35 V_DD to 5.25 V_DD)
ADS7887 (2.35 V_DD to 5.25 V_DD)
ADS7888 (2.35 V_DD to 5.25 V_DD)
3 MSPS
ADS7883 ^{3 MSPS for 4.5 VDD to 5.5 VDD}
2 MSPS for 2.7 V_DD to 4.5 V_DD
ADS7884 (2.7 V_DD to 5.5 V_DD)
ADS7885 (2.7 V_DD to 5.5 V_DD)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
Copyright © 2008, Texas Instruments Incorporated