ADS7250 Converters Datasheet

ADS7250 Datasheet, PDF, Equivalent


Part Number

ADS7250

Description

Analog-to-Digital Converters

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download ADS7250 Datasheet


ADS7250
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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.

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


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity ADS8350, ADS7850, ADS7250 SBAS5 80D – MAY 2013 – REVISED MARCH 2018 ADSxx50 Dual, 750-kSPS, 16-, 14-, and 12-Bit, Simultaneous-Sampling, Analog-t o-Digital Converters 1 Features •1 1 6-, 14-, and 12-Bit Pin-Compatible Fami ly • Simultaneously Samples Two Chann els • Pseudo-Differential Analog Inpu ts • Fast Throughput: 750 kSPS • Ex cellent 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 N MC 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 Indust rial Temperature Range: –40°C to 125 °C • Small Footprint: WQFN-16 (3 mm × 3 mm) 2 Applications • Motor Contr ol: Position Measurement Using SinCos Encoders • Optical Networking: EDFA Gain Control Loop • Protection Relays • P.
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