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Texas Instruments ADS1208 Data Handbook/Manual Specification Sheet User Guide Technical Documentation Hardware Reference Manual Product Brief Product Specifications

Summary

The ADS1208 is a sophisticated 2nd-order Delta-Sigma Modulator and Analog-to-Digital Converter designed for professional precision measurements. Ideal for engineers developing advanced industrial systems, this IC excels in applications like motor control, current sensing, and Hall sensor interfacing due to its low noise and high common-mode rejection (CMRR). The accompanying manual provides comprehensive technical specifications, including absolute maximum ratings, recommended operating conditions, and detailed electrical parameters necessary for reliable system integration.

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Page 1 Text Content

查询ADS1208供应商

ADS1208

SBAS348A–MARCH 2005–REVISED MARCH

2nd-Order Delta-Sigma Modulator

with Excitation for Hall Elements

FEATURES DESCRIPTION

±100m V Specified Input Range

The ADS1208 is 2nd-order ∆Σ (delta-sigma) modu-

±125m V Full-Scale Range lator operating at 10MHz clock rate. The specified•

input range is ±100m V, optimized for current•

95d B typ. CMR, 82d B typ. SNR

measurement with Hall sensor, especially in motor

Adjustable Current Output for Sensor Biasing

control applications. The ADS1208 contains

Digital Output Compatible to ADS1202/03 programmable current source for sensor biasing and

has integrated input buffers for fast settling of the•

Differential Digital Outputs

sample capacitors; it also requires only minimum of

Separate 2.7V to 5.5V Digital Supply Pin

external components. The differential analog input

offers low noise and excellent common-mode rejec-

APPLICATIONS

tion.

Motor Control

Current Measurement

Hall Sensors

Bridge Sensors

Instrumentation

AVDD BVDD

ADS1208

Internal 2.5V

REFOUT Buffer

Reference

REFIN Buffer

VIN+ Buffer

MDATA

2nd−Order MDATA ∆Σ Modulator

MCLK MCLK

Interface

VIN− Buffer

Circuit

RC Oscillator 20MHz M1

BGNDAGND

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.

PRODUCTION DATA information is current as of publication date. Copyright 2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Page Summary Contents For Texas Instruments ADS1208 Data Handbook/Manual Specification Sheet User Guide Technical Documentation Hardware Reference Manual Product Brief Product Specifications

Page 1 查询ADS1208供应商 ADS1208 SBAS348A–MARCH 2005–REVISED MARCH 2nd-Order Delta-Sigma Modulator with Excitation for Hall Elements FEATURES DESCRIPTION ±100m V Specified Input Range The ADS1208 is 2nd-order ∆Σ ...
Page 2 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. F...
Page 3 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH ELECTRICAL CHARACTERISTICS Over recommended operating free-air temperature range at –40°C to +85°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCL...
Page 4 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH ELECTRICAL CHARACTERISTICS (continued) Over recommended operating free-air temperature range at –40°C to +85°C, AVDD BVDD +5V, VREF internal +2.5V,...
Page 5 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH PARAMETER MEASUREMENT INFORMATION MDATA Figure 1. Mode Operation TIMING CHARACTERISTICS: MODE Over recommended operating free-air temperature range...
Page 6 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH Internal MCLK Internal MDATA MDATA Figure 3. Mode Operation TIMING CHARACTERISTICS: MODE Over recommended operating free-air temperature range at –...
Page 7 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH DEVICE INFORMATION 16-LEAD TSSOP PACKAGE (TOP VIEW) IOUT BVDD IADJ BGND AVDD MCLK VIN+ MCLK ADS1208 VIN− MDATA AGND MDATA REFIN M0 REFOUT M1 Table ...
Page 8 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH FUNCTIONAL BLOCK DIAGRAM IOUT BVDD +5V RADJ IADJ BGND R2 AVDD MCLK al l E le nt VIN+ MCLK ADS1208 VIN− MDATA R4 10µF 100n F AGND MDATA REFIN M0 1kΩ...
Page 9 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH ffs et (m IN (L IN (L TYPICAL CHARACTERISTICS At 25°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCLK input 20MHz, differential input voltage 200...
Page 10 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH TYPICAL CHARACTERISTICS (continued) At 25°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCLK input 20MHz, differential input voltage 200m VPP, com...
Page 11 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH TYPICAL CHARACTERISTICS (continued) At 25°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCLK input 20MHz, differential input voltage 200m VPP, com...
Page 12 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH (M z) (d gn itu de (d TYPICAL CHARACTERISTICS (continued) At 25°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCLK input 20MHz, differential input...
Page 13 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH TYPICAL CHARACTERISTICS (continued) At 25°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCLK input 20MHz, differential input voltage 200m VPP, com...
Page 14 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH TYPICAL CHARACTERISTICS (continued) At 25°C, AVDD BVDD +5V, VREF internal +2.5V, Mode 3, MCLK input 20MHz, differential input voltage 200m VPP, com...
Page 15 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH APPLICATION INFORMATION should be used at the output of the delta-sigma GENERAL DESCRIPTION modulator. The primary purpose of the digital filter is...
Page 16 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH modulator. An external reference could vary from also directly proportional to the reference voltage, the 0.5V to 3V. The modulator input range is ...
Page 17 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH Different Modes of Operation In Mode 2, the internal RC oscillator is running. The The typical system clock of the ADS1208 is 20MHz. data is Manche...
Page 18 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH ut ut od ai (d This filter provides the best output performance at the lowest hardware size (for example, count of digital gates). For oversampling...
Page 19 ADS1208 www.ti.com SBAS348A–MARCH 2005–REVISED MARCH CONSIDERATIONS Grounding LAYOUT Analog and digital sections of the system design must Power Supplies be carefully and cleanly partitioned. Each sec...
Page 20 PACKAGE OPTION ADDENDUM www.ti.com 27-May-2005 PACKAGING INFORMATION Orderable Device Status Package Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Type Drawing Qty ADS1208IPW ACTIVE TSS...
Page 21 MECHANICAL DATA MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,15 NOM Gage Plane Seating Plane 1,20 MAX 0,10 PINS ** DIM A MAX 3,10 5,10 ...
Page 22 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and servic...

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Brand Texas Instruments
Pages 22
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Published May 31, 2026
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