Analog-to-Digital Converters. ADS7250 Datasheet

ADS7250 Converters. Datasheet pdf. Equivalent

ADS7250 Datasheet
Recommendation ADS7250 Datasheet
Part ADS7250
Description Analog-to-Digital Converters
Feature ADS7250; Product Folder Order Now Technical Documents Tools & Software Support & Community ADS8350, ADS7.
Manufacture etcTI
Datasheet
Download ADS7250 Datasheet





Texas Instruments ADS7250
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
ADS8350, ADS7850, ADS7250
SBAS580D – MAY 2013 – REVISED MARCH 2018
ADSxx50 Dual, 750-kSPS, 16-, 14-, and 12-Bit, Simultaneous-Sampling,
Analog-to-Digital Converters
1 Features
1 16-, 14-, and 12-Bit Pin-Compatible Family
• Simultaneously Samples Two Channels
• Pseudo-Differential Analog Inputs
• Fast Throughput: 750 kSPS
• Excellent DC Performance:
– Linearity:
– ADS8350:
16-Bit NMC DNL, ±2.5 LSB, Max INL
– ADS7850:
14-Bit NMC DNL, ±1.5 LSB, Max INL
– ADS7250:
12-Bit NMC DNL, ±1 LSB, Max INL
• Excellent AC Performance:
– ADS8350: 85-dB SNR, –96-dB THD
– ADS7850: 81-dB SNR, –90-dB THD
– ADS7250: 73-dB SNR, –88-dB THD
• Simple Serial Interface
• Fully-Specified Over Extended Industrial
Temperature Range: –40°C to 125°C
• Small Footprint: WQFN-16 (3 mm × 3 mm)
2 Applications
• Motor Control:
Position Measurement Using SinCos Encoders
• Optical Networking:
EDFA Gain Control Loop
• Protection Relays
• Power Quality Measurement
• Three-Phase Power Controls
• Programmable Logic Controllers
• Industrial Automation
3 Description
The ADS8350, ADS7850, and ADS7250 devices
belong to a family of pin-compatible, dual, high-
speed, simultaneous-sampling, analog-to-digital
converters (ADCs) that support pseudo-differential
analog inputs. All devices support a simple serial
interface that can operate over a wide power-supply
range, enabling easy communication with a large
variety of host controllers.
All devices are fully specified over the extended
industrial temperature range (–40°C to 125°C) and
are available in a pin-compatible, WQFN-16 (3 mm ×
3 mm) package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS7250
ADS7850
WQFN (16)
3.00 mm × 3.00 mm
ADS8350
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Functional Block Diagram
OPA322
-
++
+V
OPA322
-
++
+V
ADS7250,
ADS7850,
ADS8350
AINP
AINM
VREF
AINM
OPA322
+
-+
+V
OPA322
+
-+
+V
AINP
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.



Texas Instruments ADS7250
ADS8350, ADS7850, ADS7250
SBAS580D – MAY 2013 – REVISED MARCH 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics: All Devices....................... 5
6.6 Electrical Characteristics: ADS7250 ......................... 6
6.7 Electrical Characteristics: ADS7850 ......................... 7
6.8 Electrical Characteristics: ADS8350 ......................... 8
6.9 Timing Requirements ................................................ 9
6.10 Switching Characteristics ........................................ 9
6.11 Typical Characteristics: ADS7250 ........................ 10
6.12 Typical Characteristics: ADS7850 ........................ 13
6.13 Typical Characteristics: ADS8350 ........................ 16
6.14 Typical Characteristics: All Devices ...................... 19
7 Detailed Description ............................................ 20
7.1 Overview ................................................................. 20
7.2 Functional Block Diagram ....................................... 20
7.3 Feature Description................................................. 21
7.4 Device Functional Modes........................................ 24
8 Application and Implementation ........................ 26
8.1 Application Information............................................ 26
8.2 Typical Applications ................................................ 26
9 Power Supply Recommendations...................... 33
10 Layout................................................................... 34
10.1 Layout Guidelines ................................................. 34
10.2 Layout Example .................................................... 34
11 Device and Documentation Support ................. 35
11.1 Documentation Support ........................................ 35
11.2 Related Links ........................................................ 35
11.3 Receiving Notification of Documentation Updates 35
11.4 Community Resources.......................................... 35
11.5 Trademarks ........................................................... 35
11.6 Electrostatic Discharge Caution ............................ 35
11.7 Glossary ................................................................ 35
12 Mechanical, Packaging, and Orderable
Information ........................................................... 36
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (June 2014) to Revision D
Page
• Changed ESD Ratings title, updated to current format, moved Storage temperature parameter to Absolute
Maximum Ratings table .......................................................................................................................................................... 4
• Changed Timing Characteristics table: split table into Timing Requirements and Switching Characteristics ....................... 9
• Deleted tSU_DOCK and tHT_CKDO parameters, replaced with tD_CKDO parameter ........................................................................ 9
• Changed Timing Diagram figure............................................................................................................................................. 9
Changes from Revision B (April 2014) to Revision C
Page
• Changed Device Information table to current standards ....................................................................................................... 1
• Corrected pseudo-differential input and reference connections in the functional block diagram ........................................... 1
• Changed Handling Ratings table to current standards ......................................................................................................... 4
Changes from Revision A (January 2014) to Revision B
Page
• Changed format to meet latest data sheet standards; added Layout section, moved existing sections ............................... 1
• Deleted Ordering Information section .................................................................................................................................... 3
Changes from Original (May 2013) to Revision A
Page
• Released to production........................................................................................................................................................... 1
2 Submit Documentation Feedback
Copyright © 2013–2018, Texas Instruments Incorporated
Product Folder Links: ADS8350 ADS7850 ADS7250



Texas Instruments ADS7250
www.ti.com
5 Pin Configuration and Functions
RTE Package
16-Pin WQFN
Top View
ADS8350, ADS7850, ADS7250
SBAS580D – MAY 2013 – REVISED MARCH 2018
REFIN-A
REFGND-A
REFGND-B
REFIN-B
1
2
3
4
Thermal
Pad
12 SDO-B
11 SDO-A
10 SCLK
9 CS
PIN
NAME
AINM-A
AINM-B
AINP-A
AINP-B
AVDD
CS
DVDD
GND
REFGND-A
REFGND-B
REFIN-A
REFIN-B
SCLK
SDO-A
SDO-B
NO.
16
5
15
6
14
9
7
8, 13
2
3
1
4
10
11
12
Thermal pad
Pin Functions
I/O
Analog input
Analog input
Analog input
Analog input
Supply
Digital input
Supply
Supply
Supply
Supply
Analog input
Analog input
Digital input
Digital output
Digital output
Supply
DESCRIPTION
Negative analog input, ADC_A
Negative analog input, ADC_B
Positive analog input, ADC_A
Positive analog input, ADC_B
ADC supply voltage
Chip-select signal; active low
Digital I/O supply
Device ground
Reference ground potential, ADC_A
Reference ground potential, ADC_B
Reference voltage input, ADC_A
Reference voltage input, ADC_B
Serial communication clock
Data output for serial communication, ADC_A
Data output for serial communication, ADC_B
Exposed thermal pad. TI recommends connecting the thermal pad to the printed
circuit board (PCB) ground.
Copyright © 2013–2018, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: ADS8350 ADS7850 ADS7250
3





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