Datasheet > ADS1120_15

ADS1120_15

更新时间： 2024-09-29 02:58:39

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德州仪器 - TI		/
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描述
Low-Power, Low-Noise, 16-Bit ADC for Small-Signal Sensors

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ADS1120_15 数据手册

ADS1120

www.ti.com

SBAS535A –AUGUST 2013–REVISED JANUARY 2014

Low-Power, Low-Noise, 16-Bit, Analog-to-Digital Converter for Small-Signal Sensors

Check for Samples: ADS1120

FEATURES

DESCRIPTION

The ADS1120 is a precision, 16-bit, analog-to-digital

converter (ADC) that offers many integrated features

to reduce system cost and component count in

applications measuring small sensor signals. The

device features two differential or four single-ended

inputs through a flexible input multiplexer (mux), a

low-noise, programmable gain amplifier (PGA), two

programmable excitation current sources, a voltage

reference, an oscillator, a low-side switch, and a

precision temperature sensor.

•

Low Current Consumption:

As Low as 120 μA (typ) in Duty-Cycle Mode

•

Wide Supply Range: 2.3 V to 5.5 V

Programmable Gain: 1 V/V to 128 V/V

Programmable Data Rates: Up to 2 kSPS

16-Bit Noise-Free Resolution at 20 SPS

Simultaneous 50-Hz and 60-Hz Rejection at

20 SPS with Single-Cycle Settling Digital Filter

•

Dual-Matched Programmable Current Sources:

50 μA to 1500 μA

The device can perform conversions at data rates up

to 2000 samples-per-second (SPS) with single-cycle

settling. At 20 SPS, the digital filter offers

simultaneous 50-Hz and 60-Hz rejection for noisy

industrial applications. The internal PGA offers gains

up to 128 V/V. This PGA makes the ADS1120 ideally-

suited for applications measuring small sensor

signals, such as resistance temperature detectors

(RTDs), thermocouples, thermistors, and bridge

sensors. The device supports measurements of

pseudo- or fully-differential signals when using the

PGA. Alternatively, the device can be configured to

bypass the internal PGA while still providing high

input impedance and gains up to 4 V/V, allowing for

single-ended measurements.

•

Internal 2.048-V Reference: 5 ppm/°C (typ) Drift

Internal 2% Accurate Oscillator

Internal Temperature Sensor:

0.5°C (typ) Accuracy

•

Two Differential or Four Single-Ended Inputs

SPI™-Compatible Interface

Package: 3,5-mm × 3,5-mm × 0,9-mm QFN

APPLICATIONS

•

Temperature Sensors:

–

Thermocouples

The power consumption is as low as 120 µA when

operating in duty-cycle mode with the PGA disabled.

Communication to the device is established through a

mode 1 SPI-compatible interface. The ADS1120 is

offered in a leadless QFN-16 or a TSSOP-16

package and is specified over a temperature range of

–40°C to +125°C.

Resistance Temperature Detectors (RTDs)

2-, 3-, or 4-Wire Types

•

Bridge Sensors

Portable Instrumentation

Factory Automation and Process Controls

REFP0

REFN0

AVDD

DVDD

50 ꢀA to

1.5 mA

Internal

Reference

Mux

ADS1120

AIN0/REFP1

AIN1

Digital Filter

and

SCLK

16-bit

ûꢁꢀADC

Mux

PGA

DIN

SPI

DOUT/DRDY

DRDY

Interface

AIN2

Low Drift

Oscillator

Precision

Temp Sensor

AIN3/REFN1

AVSS

CLK

DGND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SPI is a trademark of Motorola, Inc.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...57

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与ADS1120_15相关器件

型号	品牌	获取价格	描述	数据表
ADS1120IPW	TI	获取价格	Low-Power, Low-Noise, 16-Bit, Analog-to-Digital Converter for Small-Signal Sensors
ADS1120IPWR	TI	获取价格	Low-Power, Low-Noise, 16-Bit, Analog-to-Digital Converter for Small-Signal Sensors
ADS1120IRVA	TI	获取价格	暂无描述
ADS1120IRVAR	TI	获取价格	Low-Power, Low-Noise, 16-Bit, Analog-to-Digital Converter for Small-Signal Sensors
ADS1120IRVAT	TI	获取价格	Low-Power, Low-Noise, 16-Bit, Analog-to-Digital Converter for Small-Signal Sensors
ADS1120-Q1	TI	获取价格	适用于小信号传感器且具有 PGA 和基准电压的汽车类、16 位、2kSPS、4 通道、低功
ADS1120QPWRQ1	TI	获取价格	适用于小信号传感器且具有 PGA 和基准电压的汽车类、16 位、2kSPS、4 通道、低功
ADS-112883	DATEL	获取价格	Sampling A/D Converters
ADS-112-C/883	DATEL	获取价格	Sampling A/D Converters
ADS112C04	TI	获取价格	具有 PGA、VREF、2 个 IDAC 和 I2C 接口的 16 位 2kSPS 4 通

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