Name: ADS1211U
SKU: ADS1211U
Price: 10.03000 USD
Availability: OutOfStock

ADS1210

ADS1211

24-Bit ANALOG-TO-DIGITAL CONVERTER

FEATURES

● DELTA-SIGMA A/D CONVERTER

● 23 BITS EFFECTIVE RESOLUTION AT 10Hz

AND 20 BITS AT 1000Hz

● DIFFERENTIAL INPUTS

● PROGRAMMABLE GAIN AMPLIFIER

● FLEXIBLE SPI

™

-COMPATIBLE SSI

INTERFACE WITH 2-WIRE MODE

● PROGRAMMABLE CUT-OFF FREQUENCY

UP TO 15.6kHz

● INTERNAL/EXTERNAL REFERENCE

● ON-CHIP SELF-CALIBRATION

● ADS1211 INCLUDES 4-CHANNEL MUX

DESCRIPTION

The ADS1210 and ADS1211 are precision, wide dynamic

range, delta-sigma Analog-to-Digital (A/D) converters with

24-bit resolution operating from a single +5V supply. The

differential inputs are ideal for direct connection to transduc-

ers or low-level voltage signals. The delta-sigma architec-

ture is used for wide dynamic range and to ensure 22 bits

of no-missing-code performance. An effective resolution of

23 bits is achieved through the use of a very low-noise input

amplifier at conversion rates up to 10Hz. Effective resolu-

tions of 20 bits can be maintained up to a sample rate of

1kHz through the use of the unique Turbo modulator mode

of operation. The dynamic range of the converters is further

increased by providing a low-noise programmable gain

amplifier with a gain range of 1 to 16 in binary steps.

The ADS1210 and ADS1211 are designed for high resolution

measurement applications in smart transmitters, industrial

process control, weigh scales, chromatography, and portable

instrumentation. Both converters include a flexible synchro-

nous serial interface that is SPI-compatible and also offers a

two-wire control mode for low cost isolation.

The ADS1210 is a single-channel converter and is offered in

both 18-pin DIP and 18-lead SOIC packages. The ADS1211

includes a 4-channel input multiplexer and is available in 24-

pin DIP, 24-lead SOIC, and 28-lead SSOP packages.

APPLICATIONS

● INDUSTRIAL PROCESS CONTROL

● INSTRUMENTATION

● BLOOD ANALYSIS

● SMART TRANSMITTERS

● PORTABLE INSTRUMENTS

● WEIGH SCALES

● PRESSURE TRANSDUCERS

ADS1211

PGA

+2.5V

Reference

+3.3V Bias

Generator

Clock Generator

Serial Interface

Second-Order

∆∑

Modulator

Instruction Register

Command Register

Data Output Register

Offset Register

Full-Scale Register

Third-Order

Digital Filter

Micro Controller

Modulator Control

AGND AV

REF

OUT

REF

BIAS

OUT

MODE

DSYNCADS1211 Only ADS1210/11 CS DRDY

SCLK

DGND

SDIO

SDOUT

MUX

SBAS034B – JANUARY 1996 – REVISED SEPTEMBER 2005

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

All trademarks are the property of their respective owners.

ADS1210, ADS1211

SBAS034B

www.ti.com

All specifications T

MIN

to T

MAX

, AV

= DV

= +5V, f

XIN

= 10MHz, programmable gain amplifier setting of 1, Turbo Mode Rate of 1, REF

OUT

disabled,V

BIAS

disabled,

and external 2.5V reference, unless otherwise specified.

SPECIFICATIONS

ADS1210U, P/ADS1211U, P, E

PARAMETER CONDITIONS MIN TYP MAX UNITS

ANALOG INPUT

Input Voltage Range

(1)

0+5V

With V

BIAS

(2)

–10 +10 V

Input Impedance G = Gain, TMR = Turbo Mode Rate 4/(G • TMR)

(3)

MΩ

Programmable Gain Amplifier User Programmable: 1, 2, 4, 8, or 16 1 16

Input Capacitance 8pF

Input Leakage Current At +25°C550pA

At T

MIN

to T

MAX

1nA

SYSTEMS PERFORMANCE

Resolution 24 Bits

No Missing Codes f

DATA

= 60Hz 22 Bits

Integral Linearity f

DATA

= 60Hz ±0.0015 %FSR

DATA

= 1000Hz, TMR of 16 ±0.0015 %FSR

Unipolar Offset Error

(4)

See Note 5

Unipolar Offset Drift

(6)

1 µV/°C

Gain Error

(4)

See Note 5

Gain Error Drift

(6)

1 µV/°C

Common-Mode Rejection

(9)

At DC, +25°C 100 115 dB

At DC, T

MIN

to T

MAX

90 115 dB

50Hz, f

DATA

= 50Hz

(7)

160 dB

60Hz, f

DATA

= 60Hz

(7)

160 dB

Normal-Mode Rejection 50Hz, f

DATA

= 50Hz

(7)

100 dB

60Hz, f

DATA

= 60Hz

(7)

100 dB

Output Noise See Typical Performance Curves

Power Supply Rejection DC, 50Hz, and 60Hz 65 dB

VOLTAGE REFERENCE

Internal Reference (REF

OUT

) 2.4 2.5 2.6 V

Drift 25 ppm/°C

Noise 50 µVp-p

Load Current Source or Sink 1 mA

Output Impedance 2 Ω

External Reference (REF

) 2.0 3.0 V

Load Current 2.5 µA

BIAS

Output Using Internal Reference 3.15 3.3 3.45 V

Drift 50 ppm/°C

Load Current Source or Sink 10mA

DIGITAL INPUT/OUTPUT

Logic Family TTL Compatible CMOS

Logic Level: (all except X

)

= +5µA 2.0 DV

+0.3 V

= +5µA –0.3 0.8 V

= 2 TTL Loads 2.4 V

= 2 TTL Loads 0.4 V

Input Levels: V

3.5 DV

+0.3 V

–0.3 0.8 V

Frequency Range (f

XIN

) 0.5 10 MHz

Output Data Rate (f

DATA

) User Programmable 2.4 15,625 Hz

XIN

= 500kHz 0.12 781 Hz

Data Format User Programmable

Two’s Complement

or Offset Binary

SYSTEM CALIBRATION

Offset and Full-Scale Limits V

= Full-Scale Differential Voltage

(8)

0.7 • (2 • REF

)/G

– | V

= Offset Differential Voltage

(8)

1.3 • (2 • REF

)/G

ADS1210, ADS1211

SBAS034B

www.ti.com

POWER SUPPLY REQUIREMENTS

Power Supply Voltage 4.75 5.25 V

Power Supply Current:

Analog Current 2mA

Digital Current 3.5 mA

Additional Analog Current with

REF

OUT

Enabled 1.6 mA

BIAS

Enabled No Load 1 mA

Power Dissipation 26 40 mW

TMR of 16 37 60 mW

XIN

= 2.5MHz 17 mW

XIN

= 2.5MHz, TMR of 16 27 mW

Sleep Mode 11 mW

TEMPERATURE RANGE

Specified –40 +85 °C

Storage –60 +125 °C

NOTES: (1) In order to achieve the converter’s full-scale range, the input must be fully differential (A

N = 2 • REF

– A

P). If the input is single-ended (A

N or

P is fixed), then the full-scale range is one-half that of the differential range. (2) This range is set with external resistors and V

BIAS

(as described in the text).

Other ranges are possible. (3) Input impedance is higher with lower f

XIN

. (4) Applies after calibration. (5) After system calibration, these errors will be of the order

of the effective resolution of the converter. Refer to the Typical Performance Curves which apply to the desired mode of operation. (6) Recalibration can remove

these errors. (7) The specification also applies at f

DATA

/i, where i is 2, 3, 4, etc. (8) Voltages at the analog inputs must remain within AGND to AV

. (9) The common-

mode rejection test is performed with a 100mV differential input.

SPECIFICATIONS (CONT)

ADS1210U, P/ADS1211U, P, E

PARAMETER CONDITIONS MIN TYP MAX UNITS

PACKAGE/ORDERING INFORMATION

For the most current package and ordering information,

see the Package Option Addendum located at the end of

this data sheet.

Analog Input: Current ................................................ ±100mA, Momentary

±10mA, Continuous

Voltage ................................... AGND –0.3V to AV

+0.3V

to DV

...........................................................................–0.3V to 6V

to AGND .........................................................................–0.3V to 6V

to DGND .........................................................................–0.3V to 6V

AGND to DGND ................................................................................ ±0.3V

REF

Voltage to AGND............................................ –0.3V to AV

+0.3V

Digital Input Voltage to DGND .................................. –0.3V to DV

+0.3V

Digital Output Voltage to DGND ............................... –0.3V to DV

+0.3V

Lead Temperature (soldering, 10s) .............................................. +300°C

Power Dissipation (Any package) .................................................. 500mW

ABSOLUTE MAXIMUM RATINGS

All specifications T

MIN

to T

MAX

, AV

= DV

= +5V, f

XIN

= 10MHz, programmable gain amplifier setting of 1, Turbo Mode Rate of 1, REF

OUT

disabled,V

BIAS

disabled,

and external 2.5V reference, unless otherwise specified.

ELECTROSTATIC

DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Texas

Instruments recommends that all integrated circuits be handled

with appropriate precautions. Failure to observe proper han-

dling and installation procedures can cause damage.

ESD damage can range from subtle performance degrada-

tion to complete device failure. Precision integrated circuits

may be more susceptible to damage because very small

parametric changes could cause the device not to meet its

published specifications.

Part #	ADS1211U
Description
Category	IC
Availability	Out of Stock
Qty	0

ADS1211U

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