ADS8681IPWR datasheet(1/74 Pages) TI1

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Oscillator

CONVST/CS

PGA

1 M:

OVP

1 M:

OVP

2

nd-Order

LPF

ADC

Driver

VBIAS

AIN_P

AIN_GND

4.096-V

Reference

REFGND

DGND

AGND

DVDD

AVDD

Digital Logic

and Interface

REFIO

REFCAP

SCLK

SDI

SDO

16-Bit

SAR ADC

ADS868x

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Design

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.

ADS8681, ADS8685, ADS8689

SBAS633B – FEBRUARY 2016 – REVISED DECEMBER 2016

ADS868x 16-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System

with Programmable, Bipolar Input Ranges

1

1 Features

1

•

16-Bit ADC with Integrated Analog Front-End

•

High Speed:

–

ADS8681: 1 MSPS

–

ADS8685: 500 kSPS

–

ADS8689: 100 kSPS

•

Software Programmable Input Ranges:

–

Bipolar Ranges: ±12.288 V, ±10.24 V,

±6.144 V, ±5.12 V, and ±2.56 V

–

Unipolar Ranges: 0 V–12.288 V, 0 V–10.24 V,

0 V–6.144 V, and 0 V–5.12 V

•

5-V Analog Supply: 1.65-V to 5-V I/O Supply

•

Constant Resistive Input Impedance

≥ 1 MΩ

•

Input Overvoltage Protection: Up to ±20 V

•

On-Chip, 4.096-V Reference with Low Drift

•

Excellent Performance:

–

DNL: ±0.4 LSB; INL: ±0.5 LSB

–

SNR: 92 dB; THD: –107 dB

•

ALARM

→ High, Low Thresholds per Channel

•

multiSPI™ Interface with Daisy-Chain

•

Extended Industrial Temperature Range:

–40°C to +125°C

2 Applications

•

Channel-Isolated PLC Analog Input Modules

•

Test and Measurement

•

Battery Pack Monitoring

3 Description

The ADS8681, ADS8685, and ADS8689 devices

belong to a family of integrated data acquisition

system based on a successive approximation (SAR)

analog-to-digital

converter

(ADC).

The

devices

feature a high-speed, high-precision SAR ADC,

integrated analog front-end (AFE) input driver circuit,

overvoltage protection circuit up to ±20 V, and an on-

chip

4.096-V

reference

with

extremely

low

temperature drift.

The devices operate on a single 5-V analog supply,

but support true bipolar input ranges of ±12.288 V,

±6.144 V, ±10.24 V, ±5.12 V, and ±2.56 V, as well as

unipolar input ranges of 0 V to 12.288 V, 0 V to

10.24 V, 0 V to 6.144 V, and 0 V to 5.12 V. The gain

and offset errors are accurately trimmed within the

specified values for each input range to ensure high

dc precision. The input range selection is done by

software programming of the device internal registers.

The devices offer a high resistive input impedance

(

≥ 1 MΩ) irrespective of the selected input range.

The multiSPI digital interface is backward-compatible

to

the

traditional

SPI

protocol.

Additionally,

configurable features simplify interface to a wide

range of host controllers.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

ADS868x

TSSOP (16)

5.00 mm × 4.40 mm

WQFN (16)

4.00 mm × 4.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Block Diagram

Số phần tương tự - ADS8681IPWR

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	ADS8681IPWR	239Kb / 8P	[Old version datasheet] Single-Supply, SAR ADC Data Acquisition System

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nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	ADS8671	1Mb / 72P	[Old version datasheet] 14-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System with Programmable, Bipolar Input Ranges
	ADS8691	1Mb / 73P	[Old version datasheet] 18-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System with Programmable, Bipolar Input Ranges
	ADS8661	1Mb / 71P	[Old version datasheet] 12-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System with Programmable, Bipolar Input Ranges
	ADS8681	239Kb / 8P	[Old version datasheet] Single-Supply, SAR ADC Data Acquisition System
	ADS8688AT	3Mb / 78P	[Old version datasheet] 16-Bit, 500-kSPS, 8-Channel, Single-Supply, SAR ADC With Bipolar Input Ranges
SG Micro Corp	SGM51652H4	1Mb / 43P	16-Bit, 500kSPS, 4- and 8-Channel,Single Supply, SAR ADCs with Bipolar Input Ranges DECEMBER 2022-REV.A
Linear Technology	LTC1609	432Kb / 24P	16-Bit, 200ksps, Serial ADC with Multiple Input Ranges
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