ADS7887M Datasheet, PDF (1/17 Pages) Texas Instruments – 10-BIT 1.25-MSPS MICRO-POWER MINIATURE SAR ANALOG-TO-DIGITAL CONVERTER

ADS7887M
www.ti.com
SLAS750A – JUNE 2011 – REVISED JUNE 2011
10-BIT 1.25-MSPS MICRO-POWER MINIATURE
SAR ANALOG-TO-DIGITAL CONVERTER
Check for Samples: ADS7887M
FEATURES
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• 1.25-MHz Sample Rate Serial Device
• 10-Bit Resolution
• 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 V_DD
– 8 mW at 5-V V_DD
• ±0.35 LSB INL, DNL
• 61-dB SINAD, –84-dB THD
• Unipolar Input Range: 0 V to V_DD
• Power Down Current: 10 µA Max
• Wide Input Bandwidth: 15 MHz at 3 dB
• 6-Pin SOT23 Package
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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 ADS7887 is a 10-bit 1.25-MSPS analog-to-digital converter (ADC). The device includes a capacitor-based
SAR A/D converter with inherent sample and hold. The serial interface 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 2.35 V to 5.25 V. The low power consumption of the device
makes it suitable for battery-powered applications. The device also includes a power-saving powerdown 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. 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
circuits with different supply levels. Also, this relaxes restriction on power-up sequencing.
The ADS7887 is available in a 6-pin SOT23 package and is specified for operation from –55°C to 125°C.
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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 © 2011, Texas Instruments Incorporated