ADS7955-Q1 Datasheet, PDF (1/32 Pages) Texas Instruments – 10-Bit, 1 MSPS, 8-Channel, Single-Ended, MicroPower, Serial Interface ADC

ADS7955-Q1
www.ti.com
SLAS814 – DECEMBER 2011
10-Bit, 1 MSPS, 8-Channel, Single-Ended, MicroPower, Serial Interface ADC
Check for Samples: ADS7955-Q1
FEATURES
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• Qualified for Automotive Applications
• 1-MHz Sample Rate Serial Devices
• 10-Bit Resolution
• Zero Latency
• 20-MHz Serial Interface
• Analog Supply Range: 2.7 to 5.25 V
• I/O Supply Range: 1.7 to 5.25 V
• Two SW Selectable Unipolar, Input Ranges: 0
to 2.5V and 0 to 5V
• Auto and Manual Modes for Channel Selection
• 8-Channel Device can Share 16 Channel
Device Footprint
• Two Programmable Alarm Levels per Channel
• Four Individually Configurable GPIOs for
TSSOP Package Devices
• Typical Power Dissipation: 14.5 mW (+VA = 5
V, +VBD = 3 V) at 1 MSPS
• Power-Down Current (1 μA)
• Input Bandwidth (47 MHz at 3 dB)
• 30-Pin TSSOP Package
APPLICATIONS
• PLC / IPC
• Battery Powered Systems
• Medical Instrumentation
• Digital Power Supplies
• Touch Screen Controllers
• High-Speed Data Acquisition Systems
• High-Speed Closed-Loop Systems
DESCRIPTION
The ADS7955-Q1 is a
analog-to-digital converter.
10-bit
multichannel
The device includes a capacitor based SAR A/D
converter with inherent sample and hold.
The device accepts a wide analog supply range from
2.7V to 5.25V. Very low power consumption makes
this device suitable for battery-powered and isolated
power supply applications.
A wide 1.7V to 5.25V I/O supply range facilitates a
glue-less interface with the most commonly used
CMOS digital hosts.
The serial interface is controlled by CS and SCLK for
easy connection with microprocessors and DSP.
The input signal is sampled with the falling edge of
CS. It uses SCLK for conversion, serial data output,
and reading serial data in. The device allows auto
sequencing of preselected channels or manual
selection of a channel for the next conversion cycle.
There are two software selectable input ranges (0V -
2.5V and 0V - 5V), four individually configurable
GPIOs, and two programmable alarm thresholds per
channel. These features make the device suitable for
most data acquisition applications.
The device offers an attractive power-down feature.
This is extremely useful for power saving when the
device is operated at lower conversion speeds.
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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