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ADS7953 Datasheet Preview

ADS7953 Datasheet

Serial Interface ADC

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ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955
ADS7956, ADS7957, ADS7958, ADS7959, ADS7960, ADS7961
SLAS605C – JUNE 2008 – REVISED JULY 2018
ADS79xx Pin Compatible, 12-, 10-, 8-Bit, 1-MSPS, 16-, 12-, 8-, 4-Channel, Single-Ended,
Serial Interface ADCs
1 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 5.25 V
• I/O Supply Range: 1.7 to 5.25 V
• Two SW Selectable Unipolar, Input Ranges: 0 to
VREF and 0 to 2 x VREF
• 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
2 Applications
• PLC/IPC
• Optical Line Card Monitoring
• Medical Instrumentation
• Digital Power Supplies
• Multi-Channel, General-Purpose Signal Monitoring
• High-Speed Data Acquisition Systems
• High-Speed Closed-Loop Systems
Detailed Block Diagram
High input
impedance PGA
(or non inverting
buffer such as
THS4031)
Ch0
Ch1
Ch2
MXO
PGA Gain
Control
GPIO1
GPIO2
GPIO3
AINP
GPIO0
high-alarm
low-alarm
ADC
SDO
To
Host
(1)
Chn
REF5025
o/p
REF
10 µF
SDI
SCLK
CS
3 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 VREF and 0 V to 2 × VREF), 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TSSOP (30)
7.80 mm × 4.40 mm
ADS79xx
VQFN (24)
TSSOP (38)
4.00 mm × 4.00 mm
9.70 mm × 4.40 mm
VQFN (32)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

ADS7953 Datasheet Preview

ADS7953 Datasheet

Serial Interface ADC

No Preview Available !

ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955
ADS7956, ADS7957, ADS7958, ADS7959, ADS7960, ADS7961
SLAS605C – JUNE 2008 – REVISED JULY 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 5
6 Pin Configuration and Functions ......................... 5
7 Specifications....................................................... 10
7.1 Absolute Maximum Ratings .................................... 10
7.2 ESD Ratings............................................................ 10
7.3 Recommended Operating Conditions..................... 10
7.4 Thermal Information: TSSOP.................................. 11
7.5 Thermal Information: VQFN.................................... 11
7.6 Electrical Characteristics: ADS7950, ADS7951,
ADS7952, ADS7953 ................................................ 12
7.7 Electrical Characteristics, ADS7954, ADS7955,
ADS7956, ADS7957 ................................................ 14
7.8 Electrical Characteristics, ADS7958, ADS7959,
ADS7960, ADS7961 ................................................ 15
7.9 Timing Requirements .............................................. 17
7.10 Typical Characteristics (All ADS79xx Family
Devices) ................................................................... 20
7.11 Typical Characteristics (12-Bit Devices Only)....... 21
7.12 Typical Characteristics (12-Bit Devices Only)....... 27
8 Detailed Description ............................................ 28
8.1 Overview ................................................................. 28
8.2 Functional Block Diagram ....................................... 29
8.3 Feature Description................................................. 29
8.4 Device Functional Modes........................................ 29
8.5 Programming........................................................... 41
9 Application and Implementation ........................ 46
9.1 Application Information............................................ 46
9.2 Typical Applications ................................................ 48
10 Power Supply Recommendations ..................... 51
11 Layout................................................................... 52
11.1 Layout Guidelines ................................................. 52
11.2 Layout Examples................................................... 52
12 Device and Documentation Support ................. 54
12.1 Documentation Support ........................................ 54
12.2 Related Links ........................................................ 54
12.3 Receiving Notification of Documentation Updates 54
12.4 Community Resources.......................................... 54
12.5 Trademarks ........................................................... 54
12.6 Electrostatic Discharge Caution ............................ 55
12.7 Glossary ................................................................ 55
13 Mechanical, Packaging, and Orderable
Information ........................................................... 55
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (July 2015) to Revision C
Page
• Changed 0 to 2.5 V and 0 to 5 V to 0 to VREF and 0 to 2 x VREF in Input Range Features bullet ......................................... 1
• Changed GPIO Features bullet ............................................................................................................................................. 1
• Changed Optical Line Card Monitoring and Multi-Channel, General-Purpose Signal Monitoring Applications bullets.......... 1
• Changed (0 V to 2.5 V and 0 V to 5 V) to (0 V to VREF and 0 V to 2 × VREF) in Description section ..................................... 1
• Deleted Companion Products table........................................................................................................................................ 5
• Changed RGE to RHB for two 32-pin VQFN pin diagrams ................................................................................................... 5
• Added 30-pin DBT package .................................................................................................................................................. 5
• Changed I/O column of Pin Functions: TSSOP Packages table to show full definition instead of abbreviation ................... 6
• Added active low to definition of CS pin in Pin Functions: TSSOP Packages table .............................................................. 7
• Changed pin name and description of Alarm pin in Pin Functions: TSSOP Packages table ............................................... 7
• Added settings to description of Range pin in Pin Functions: TSSOP Packages table: added (1) to high and (0) to low .... 7
• Added active low to description of CS pin in Pin Functions: VQFN Packages table ............................................................. 8
• Changed pin name and description of Alarm pin in Pin Functions: VQFN Packages table .................................................. 9
• Changed value of Input current to any pin except supply pins row from ±10 mA (max) to –10 mA (min) and 10 mA
(max) in Absolute Maximum Ratings table........................................................................................................................... 10
• Changed VBD = 1.7 V to 5.25 V to VBD = 1.7 V to +VA in condition statement................................................................. 12
• Changed minimum specification from –1 LSB to –0.99 LSB in first row of Differential linearity parameter......................... 12
• Added input to Reference input resistance parameter name ............................................................................................... 13
• Changed maximum specification from FFC Hex to 4092 LSB in Alarm Setting parameters .............................................. 13
• Changed unit from Numbers to Conversion in Invalid conversions after power up or reset parameter ............................. 13
• Changed VBD = 1.7 V to 5.25 V to VBD = 1.7 V to +VA in condition statement ................................................................ 14
2
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Copyright © 2008–2018, Texas Instruments Incorporated
Product Folder Links: ADS7950 ADS7951 ADS7952 ADS7953 ADS7954 ADS7955 ADS7956 ADS7957 ADS7958
ADS7959 ADS7960 ADS7961



Part Number ADS7953
Description Serial Interface ADC
Maker etcTI
Total Page 3 Pages
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ADS7953 Datasheet PDF





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