ADS7950 Datasheet, PDF (1/43 Pages) Texas Instruments – 12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs

ADS7950, ADS7951, ADS7952, ADS7953
ADS7954, ADS7955, ADS7956, ADS7957
ADS7958, ADS7959, ADS7960, ADS7961
www.ti.com ...................................................................................................................................................................................................... SLAS605 – JUNE 2008
12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs
FEATURES
1
• 1-MHz Sample Rate Serial Devices
• Product Family of 12/10/8-Bit Resolution
• Zero Latency
• 20-MHz Serial Interface
• Analog Supply Range: 2.7 to 5.25V
• I/O Supply Range: 1.7 to 5.25V
• Two SW Selectable Unipolar, Input Ranges: 0
to 2.5V and 0 to 5V
• Auto and Manual Modes for Channel Selection
• 12,8,4-Channel Devices can Share 16 Channel
Device Footprint
• Two Programmable Alarm Levels per Channel
• Four Individually Configurable GPIOs
• Typical Power Dissipation: 14.5 mW (+VA = 5V,
+VBD = 3V) at 1 MSPS
• Power-Down Current (1 µA)
• Input Bandwidth (47 at 3dB)
• 30-Pin and 38-Pin TSSOP Packages
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 ADS79XX is a 12/10/8-bit multichannel
analog-to-digital converter family. The following table
shows all twelve devices from this product family.
The devices include a capacitor based SAR A/D
converter with inherent sample and hold.
The devices accept a wide analog supply range from
2.7V to 5.25V. Very low power consumption makes
these devices 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 devices allow 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 devices suitable
for most data acquisition applications.
The devices offer an attractive power-down feature.
This is extremely useful for power saving when the
device is operated at lower conversion speeds.
The 16/12-channel devices from this family are
available in a 38-pin TSSOP package and the
4/8-channel devices are available in a 30-pin TSSOP
package.
MICROPOWER MULTI-CHANNEL ADS79XX FAMILY
NUMBER OF
CHANNELS
16
12
8
4
12 BIT
ADS7953
ADS7952
ADS7951
ADS7950
RESOLUTION
10 BIT
ADS7957
ADS7956
ADS7955
ADS7954
8 BIT
ADS7961
ADS7960
ADS7959
ADS7958
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