Texas Instruments ADS7953 Product Info

Parameters

Resolution (Bits)	12
Sample rate (max) (ksps)	1000
Number of input channels	16
Interface type	SPI
Architecture	SAR
Input type	Single-ended
Multichannel configuration	Multiplexed
Rating	Catalog
Reference mode	External
Input voltage range (max) (V)	5.25
Input voltage range (min) (V)	0
Operating temperature range (°C)	-40 to 125
Power consumption (typ) (mW)	11.5
Analog supply voltage (min) (V)	2.7
Analog supply voltage (max) (V)	5.25
SNR (dB)	71.7
Digital supply (min) (V)	1.7
Digital supply (max) (V)	5.25

Package

TSSOP (DBT)-38-62.08 mm² 9.7 x 6.4

Features

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 5.25 V
I/O Supply Range: 1.7 to 5.25 V
Two SW Selectable Unipolar, Input Ranges: 0 to V_REF and 0 to 2 x V_REF
Auto and Manual Modes for Channel Selection
4-, 8-Channel Devices and 12-, 16-Channel Devices Share the Same Footprint
Two Programmable Alarm Levels per Channel
Four Individually Configurable GPIOs in TSSOP Package: One GPIO in VQFN Package
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)
38-, 30-Pin TSSOP and 32-, 24-Pin VQFN Packages

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 5.25 V
I/O Supply Range: 1.7 to 5.25 V
Two SW Selectable Unipolar, Input Ranges: 0 to V_REF and 0 to 2 x V_REF
Auto and Manual Modes for Channel Selection
4-, 8-Channel Devices and 12-, 16-Channel Devices Share the Same Footprint
Two Programmable Alarm Levels per Channel
Four Individually Configurable GPIOs in TSSOP Package: One GPIO in VQFN Package
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)
38-, 30-Pin TSSOP and 32-, 24-Pin VQFN Packages

Description

The ADS79xx is a 12-, 10-, 8-bit pin compatible multichannel analog-to-digital converter family. The device comparison 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 2.7 V to 5.25 V. Very low power consumption makes these devices suitable for battery-powered and isolated power-supply applications.

A wide 1.7-V to 5.25-V I/O supply range facilitates a glueless interface with the most commonly used 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 (0 V to V_REF and 0 V to 2 × V_REF), individually configurable GPIOs (four in case of the TSSOP and one on the VQFN 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 VQFN package and the 4/8-channel devices are available in a 30-pin TSSOP and 24 pin VQFN packages.