ADS7142-Q1 ADC Datasheet

ADS7142-Q1 Datasheet, PDF, Equivalent


Part Number

ADS7142-Q1

Description

Automotive 2-Channel 12-Bit ADC

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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ADS7142-Q1
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ADS7142-Q1
SBAS891A – NOVEMBER 2018 – REVISED OCTOBER 2019
ADS7142-Q1 Automotive, 2-Channel, 12-Bit, 140-kSPS, I2C-Compatible ADC With
Programmable Threshold and Host Wake-Up Features
1 Features
1 AEC-Q100 qualified for automotive applications:
– Device temperature grade 1:
–40°C to 125°C, TA
• Small package size: 3 mm × 2 mm
• 12-bit noise-free resolution
• Up to 140-kSPS sampling rate
• Efficient host sleep and wake-up:
– Autonomous monitoring at 900 nW
– Windowed comparator for event-triggered host
wake-up
• Independent configuration and calibration:
– Dual-channel, pseudo-differential, or ground-
sense input configuration
– Programmable thresholds for calibration
– Internal calibration improves offset and drift
• False trigger prevention:
– Programmable thresholds per channel
– Programmable hysteresis for noise immunity
– Event counter for transient rejection
• I2C interface:
– Compatible from 1.65 V to 3.6 V
– 8 configurable addresses
– Up to 3.4 MHz (high speed)
• Analog supply: 1.65 V to 3.6 V
2 Applications
General-purpose voltage, current and temperature
monitoring in:
• Automotive camera modules
• Driver monitoring and assistance systems
• Infotainment systems and clusters
• Electric and ICE powertrain systems
3 Description
The ADS7142-Q1 is 12-bit, 140-kSPS successive-
approximation register (SAR) analog-to-digital
converter (ADC) that can autonomously monitor
signals while maximizing system power, reliability,
and performance. The device implements event-
triggered interrupts per channel using a digital
window comparator with programmable high and low
thresholds, hysteresis, and event counter. The device
includes a dual-channel analog multiplexer in front of
a SAR ADC followed by an internal data buffer for
converting and capturing data from sensors.
The ADS7142-Q1 is available in a 10-pin WSON
package and can achieve low power consumption of
only 900 nW. The small form-factor and low-power
consumption make this device suitable for space-
constrained applications.
PART NAME
ADS7142-Q1
Device Information(1)
PACKAGE
BODY SIZE (NOM)
WSON (10)
3.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Block Diagram
AVDD
DVDD
AINP/AIN0
Analog Input and
Multiplexer
AINM/AIN1
SAR-ADC
High/Low Threshold
± Hysteresis
Conversion Result
Offset
Calibration
Oscillator and
Timing Control
Accumulator
GND
Data Buffer
Conversion Result [0]
«««.
«««.
«««.
Conversion Result [15]
Digital
Window
Comparator
I2C Interface
I2C Address
Selector
ADDR
ALERT
SCL
SDA
BUSY/RDY
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.

ADS7142-Q1
ADS7142-Q1
SBAS891A – NOVEMBER 2018 – REVISED OCTOBER 2019
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 Modes......................... 5
6.6 Electrical Characteristics: Manual Mode................... 6
6.7 Electrical Characteristics: Autonomous Modes......... 7
6.8 Electrical Characteristics: High Precision Mode ....... 8
6.9 Timing Requirements ................................................ 8
6.10 Switching Characteristics ...................................... 10
6.11 Typical Characteristics: All Modes ........................ 12
6.12 Typical Characteristics: Manual Mode .................. 13
6.13 Typical Characteristics: Autonomous Modes........ 17
6.14 Typical Characteristics: High-Precision Mode ...... 18
7 Detailed Description ............................................ 19
7.1 Overview ................................................................. 19
7.2 Functional Block Diagram ....................................... 19
7.3 Feature Description................................................. 20
7.4 Device Functional Modes........................................ 28
7.5 Programming........................................................... 39
7.6 Register Map........................................................... 42
8 Application and Implementation ........................ 59
8.1 Application Information............................................ 59
8.2 Typical Applications ................................................ 59
9 Power Supply Recommendations...................... 65
9.1 AVDD and DVDD Supply Recommendations......... 65
10 Layout................................................................... 66
10.1 Layout Guidelines ................................................. 66
10.2 Layout Example .................................................... 67
11 Device and Documentation Support ................. 68
11.1 Receiving Notification of Documentation Updates 68
11.2 Community Resources.......................................... 68
11.3 Trademarks ........................................................... 68
11.4 Electrostatic Discharge Caution ............................ 68
11.5 Glossary ................................................................ 68
12 Mechanical, Packaging, and Orderable
Information ........................................................... 68
4 Revision History
Changes from Original (November 2018) to Revision A
Page
• Changed document status from advance information to production data.............................................................................. 1
2 Submit Documentation Feedback
Copyright © 2018–2019, Texas Instruments Incorporated
Product Folder Links: ADS7142-Q1


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity ADS7142-Q1 SBAS891A – NOVEMBE R 2018 – REVISED OCTOBER 2019 ADS7142 -Q1 Automotive, 2-Channel, 12-Bit, 140- kSPS, I2C-Compatible ADC With Programma ble Threshold and Host Wake-Up Features 1 Features •1 AEC-Q100 qualified fo r automotive applications: – Device t emperature grade 1: –40°C to 125°C, TA • Small package size: 3 mm × 2 m m • 12-bit noise-free resolution • Up to 140-kSPS sampling rate • Effici ent host sleep and wake-up: – Autonom ous monitoring at 900 nW – Windowed c omparator for event-triggered host wake -up • Independent configuration and c alibration: – Dual-channel, pseudo-di fferential, or groundsense input config uration – Programmable thresholds for calibration – Internal calibration i mproves offset and drift • False trig ger prevention: – Programmable thresh olds per channel – Programmable hyste resis for noise immunity – Event counter for transient rejection • I2C interface: – Compatible from 1..
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