Datasheet > ADS1146_14

ADS1146_14

更新时间： 2024-10-02 02:58:31

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16-Bit Analog-to-Digital Converters for Temperature Sensors

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ADS1146_14 数据手册

ADS1146

ADS1147

ADS1148

www.ti.com

SBAS453C –JULY 2009–REVISED APRIL 2010

16-Bit Analog-to-Digital Converters for Temperature Sensors

Check for Samples: ADS1146, ADS1147, ADS1148

FEATURES

DESCRIPTION

•

16 Bits, No Missing Codes

The ADS1146, ADS1147, and ADS1148 are

highly-integrated, precision, 16-bit analog-to-digital

converters (ADCs). The ADS1146/7/8 feature an

onboard, low-noise, programmable gain amplifier

•

Data Output Rates Up to 2kSPS

•

Single-Cycle Settling for All Data Rates

Simultaneous 50/60Hz Rejection at 20SPS

4 Differential/7 Single-Ended Inputs (ADS1148)

2 Differential/3 Single-Ended Inputs (ADS1147)

Matched Current Source DACs

(PGA),

precision delta-sigma ADC with

single-cycle settling digital filter, and an internal

oscillator. The ADS1147 and ADS1148 also provide a

built-in voltage reference with 10mA output capacity,

and

two

matched

programmable

(DACs).

current

The

Internal Voltage Reference

digital-to-analog

converters

ADS1146/7/8 provide a complete front-end solution

for temperature sensor applications including thermal

couples, thermistors, and resistance temperature

detectors (RTDs).

Sensor Burnout Detection

4/8 General-Purpose I/Os (ADS1147/8)

Internal Temperature Sensor

Power Supply and V_REFMonitoring

(ADS1147/8)

An input multiplexer supports four differential inputs

for the ADS1148, two for the ADS1147, and one for

the ADS1146. In addition, the multiplexer has a

•

Self and System Calibration

sensor

thermocouples,

burnout

detect,

system

voltage

monitoring,

bias

for

and

SPI™-Compatible Serial Interface

Analog Supply Operation:

+2.7V to +5.25V Unipolar, ±2.5V Bipolar

general-purpose digital I/Os (ADS1147 and

ADS1148). The onboard, low-noise PGA provides

selectable gains of 1 to 128. The delta-sigma

modulator and adjustable digital filter settle in only

one cycle, for fast channel cycling when using the

input multiplexer, and support data rates up to

2kSPS. For data rates of 20SPS or less, both 50Hz

and 60Hz interference are rejected by the filter.

•

Digital Supply: +2.7V to +5.25V

Operating Temperature –40°C to +125°C

APPLICATIONS

•

Temperature Measurement

–

RTDs, Thermocouples, and Thermistors

The ADS1146 is offered in a small TSSOP-16

package, the ADS1147 is available in a TSSOP-20

package, and the ADS1148 in a TSSOP-28 package.

All three devices operate over the extended specified

temperature range of –40°C to +105°C.

•

Pressure Measurement

Industrial Process Control

ADS1148 Only

REFP0/ REFN0/

AVDD

REFP REFN

DVDD

AVDD

GPIO0 GPIO1 REFP1 REFN1 VREFOUT VREFCOM

DVDD

Burnout

Detect

Burnout

Detect

ADS1147

ADS1148

ADS1146

Voltage

VREF Mux

V_BIAS

Reference

GPIO

SCLK

AIN0/IEXC

AIN1/IEXC

System

Monitor

DIN

Serial

Interface

and

Serial

Interface

and

DRDY

DOUT/DRDY

DRDY

DOUT/DRDY

AIN2/IEXC/GPIO2

AIN3/IEXC/GPIO3

3rd Order

Adjustable

Digital

Filter

3rd Order

Adjustable

Digital

Filter

AIN0

AIN1

Input

Mux

Input

Mux

PGA

Modulator

AIN4/IEXC/GPIO4

AIN5/IEXC/GPIO5

Control

START

RESET

START

RESET

Dual

Current

DACs

AIN6/IEXC/GPIO6

AIN7/IEXC/GPIO7

Internal Oscillator

ADS1148 Only

Burnout

Detect

Burnout

Detect

AVSS

CLK

DGND

AVSS IEXC1 IEXC2

CLK

DGND

ADS1148 Only

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...50

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与ADS1146_14相关器件

型号	品牌	获取价格	描述	数据表
ADS1146EVM	TI	获取价格	Contains all support circuitry needed for the ADS1146/ADS1246
ADS1146EVM-PDK	TI	获取价格	Contains all support circuitry needed for the ADS1146/ADS1246
ADS1146IPW	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1146IPWR	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1147	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1147IPW	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1147IPWR	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1148	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1148EVM	TI	获取价格	Contains all support circuitry needed for the ADS1148/ADS1248
ADS1148IPW	TI	获取价格	16-Bit Analog-to-Digital Converters for Temperature Sensors

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