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 5.25V
` 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 A)
` Input Bandwidth (47 at 3dB)
` 30-Pin and 38-Pin TSSOP Packages
Application· PLC / IPC
· Battery Powered Systems
· Medical Instrumentation
· Digital Power Supplies
· Touch Screen Controllers
· High-Speed Data Acquisition Systems
· High-Speed Closed-Loop SystemsPinout
Specifications
| |
VALUE |
UNIT |
| AINP or CHn to AGND |
0.3 to +VA +0.3 |
V |
| +VA to AGND, +VBD to BDGND |
0.3 to +7.0 |
V |
| Digital input voltage to BDGND |
0.3 to (7.0) |
V |
| Digital output to BDGND |
0.3 to (+VA + 0.3) |
V |
| Operating temperature range |
40 to 125 |
|
| Storage temperature range |
65 to 150 |
|
| Junction temperature (TJ Max) |
150 |
|
| TSSOP package |
Power dissipation |
(TJ MaxTA)/JA |
|
| JA Thermal impedance |
100.6 |
/W |
ADS79XX family of devices are rated for MSL2 260 per the JSTD-020
specifications |
|
|
(1) Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.
DescriptionThe 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 ADS79XX includes a capacitor based SAR A/D converter with inherent sample and hold.
The ADS79XX accepts 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 of ADS79XX 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 GPLOs,and two programmable alarm thresholds perchannel.These features make the ADS79XX suitable for most data acquisition applications.
The ADS79XX offers an attractive power-down feature. This is extremely useful for power saving when the device is operated at lower conversion speeds.
The ADS79XX 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.
ADS7950 Data Sheet
