Datasheet > ADS1246_101

ADS1246_101

更新时间： 2024-11-13 11:50:07

品牌	Logo	应用领域
德州仪器 - TI		转换器传感器温度传感器
页数	文件大小	规格书
65页	1061K
描述
24-Bit Analog-to-Digital Converters for Temperature Sensors

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ADS1246_101 数据手册

ADS1246

ADS1247

ADS1248

www.ti.com

SBAS426D –AUGUST 2008–REVISED MARCH 2010

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

Check for Samples: ADS1246, ADS1247, ADS1248

FEATURES

DESCRIPTION

•

24 Bits, No Missing Codes

The ADS1246, ADS1247, and ADS1248 are

highly-integrated, precision, 24-bit analog-to-digital

converters (ADCs). The ADS1246/7/8 feature an

onboard, low-noise, programmable gain amplifier

(PGA), a precision delta-sigma (ΔΣ) ADC with a

single-cycle settling digital filter, and an internal

oscillator. The ADS1247 and ADS1248 also provide a

built-in, very low drift voltage reference with 10mA

output capacity, and two matched programmable

current digital-to-analog converters (DACs). The

ADS1246/7/8 provide a complete front-end solution

for temperature sensor applications including thermal

couples, thermistors, and RTDs.

•

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 (ADS1248)

2 Differential/3 Single-Ended Inputs (ADS1247)

Low-Noise PGA: 48nV at PGA = 128

Matched Current Source DACs

Very Low Drift Internal Voltage Reference:

10ppm/°C (max)

•

Sensor Burnout Detection

An input multiplexer supports four differential inputs

for the ADS1248, two for the ADS1247, and one for

the ADS1246. In addition, the multiplexer has a

4/8 General-Purpose I/Os (ADS1247/8)

Internal Temperature Sensor

sensor

thermocouples,

burnout

detect,

system

voltage

monitoring,

bias

for

and

Power Supply and V_REFMonitoring

(ADS1247/8)

general-purpose digital I/Os (ADS1247 and

ADS1248). The onboard, low-noise PGA provides

selectable gains of 1 to 128. The ΔΣ 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.

•

Self and System Calibration

SPI™-Compatible Serial Interface

Analog Supply Unipolar (+2.7V to

+5.25V)/Bipolar (±2.5V) Operation

•

Digital Supply: +2.7V to +5.25V

Operating Temperature –40°C to +125°C

The ADS1246 is offered in a small TSSOP-16

package, the ADS1247 is available in a TSSOP-20

package, and the ADS1248 in a TSSOP-28 package.

All three devices are rated over the extended

specified temperature range of –40°C to +105°C.

APPLICATIONS

•

Temperature Measurement

–

RTDs, Thermocouples, and Thermistors

•

Pressure Measurement

Industrial Process Control

ADS1248 Only

REFP0/ REFN0/

AVDD

REFP REFN

DVDD

AVDD

GPIO0 GPIO1 REFP1 REFN1 VREFOUT VREFCOM

DVDD

Burnout

Detect

Burnout

Detect

ADS1247

ADS1248

ADS1246

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

ADS1248 Only

Burnout

Detect

Burnout

Detect

AVSS

CLK

DGND

AVSS IEXC1 IEXC2

CLK

DGND

ADS1248 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...65

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与ADS1246_101相关器件

型号	品牌	获取价格	描述	数据表
ADS1246_102	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1246_13	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1246_14	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1246EVM	TI	获取价格	Contains all support circuitry needed for the ADS1146/ADS1246
ADS1246EVM-PDK	TI	获取价格	Contains all support circuitry needed for the ADS1146/ADS1246
ADS1246IPW	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1246IPW/ADS114	TI	获取价格	Contains all support circuitry needed for the ADS1146/ADS1246
ADS1246IPWR	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1247	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors
ADS1247IPW	TI	获取价格	24-Bit Analog-to-Digital Converters for Temperature Sensors

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