ADS7950 Datasheet, PDF (1/65 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
SLAS605A – JUNE 2008 – REVISED JANUARY 2010
12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs
Check for Samples: ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955, ADS7956, ADS7957, ADS7958, ADS7959,
ADS7960, ADS7961
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 for
TSSOP package devices. One GPIO for QFN
devices
• Typical Power Dissipation: 14.5 mW (+VA = 5V,
+VBD = 3V) at 1 MSPS
• Power-Down Current (1 mA)
• Input Bandwidth (47 MHz at 3dB)
• 38-,30-Pin TSSOP and 32-,24-Pin QFN
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 ( in case of TSSOP package devices), 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 and 32 pin QFN
package and the 4/8-channel devices are available in
a 30-pin TSSOP and 24 pin QFN packages.
MICROPOWER MULTI-CHANNEL ADS79XX FAMILY
NUMBER OF
CHANNELS
12 BIT
RESOLUTION
10 BIT
8 BIT
16
ADS7953
ADS7957
ADS7961
12
ADS7952
ADS7956
ADS7960
8
ADS7951
ADS7955
ADS7959
4
ADS7950
ADS7954
ADS7958
1
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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.
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