TEXAS INSTRUMENTS XTR112, XTR1144 Technical data

0 (0)

®

XTR114

XTR112

XTR112

XTR114

4-20mA CURRENT TRANSMITTERS with Sensor Excitation and Linearization

FEATURES

LOW UNADJUSTED ERROR

PRECISION CURRENT SOURCES XTR112: Two 250μA

XTR114: Two 100μA

RTD OR BRIDGE EXCITATION

LINEARIZATION

TWO OR THREE-WIRE RTD OPERATION

LOW OFFSET DRIFT: 0.4μV/°C

LOW OUTPUT CURRENT NOISE: 30nAp-p

HIGH PSR: 110dB min

HIGH CMR: 86dB min

WIDE SUPPLY RANGE: 7.5V TO 36V

SO-14 SOIC PACKAGE

DESCRIPTION

The XTR112 and XTR114 are monolithic 4-20mA, two-wire current transmitters. They provide complete current excitation for high impedance platinum RTD temperature sensors and bridges, instrumentation amplifier, and current output circuitry on a single inte-

grated circuit. The XTR112 has two 250μA current sources while the XTR114 has two 100μA sources for

RTD excitation.

Versatile linearization circuitry provides a 2nd-order correction to the RTD, typically achieving a 40:1 improvement in linearity.

Instrumentation amplifier gain can be configured for a wide range of temperature or pressure measurements. Total unadjusted error of the complete current transmitter is low enough to permit use without adjustment in many applications. This includes zero output current drift, span drift and nonlinearity. The XTR112 and XTR114 operate on loop power supply voltages down to 7.5V.

Both are available in an SO-14 surface-mount package and are specified for the –40°C to +85°C indus-

trial temperature range.

APPLICATIONS

INDUSTRIAL PROCESS CONTROL

FACTORY AUTOMATION

SCADA REMOTE DATA ACQUISITION

REMOTE TEMPERATURE AND PRESSURE TRANSDUCERS

Pt1000 NONLINEARITY CORRECTION

USING XTR112 and XTR114

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(%)

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

Uncorrected

 

 

 

 

 

 

 

 

 

Nonlinearity

 

 

 

 

 

 

 

2

 

 

 

RTD Nonlinearity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

Corrected

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nonlinearity

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–1

 

 

 

 

 

 

 

 

 

 

–200°C

 

 

 

 

 

 

+850°C

 

 

 

Process Temperature (°C)

IR

IR

 

 

VLIN

 

 

 

 

VREG

7.5V to 36V

 

 

+

 

 

 

 

VPS

 

 

 

 

 

 

 

XTR112

4-20 mA

R

 

 

VO

G

 

XTR114

 

 

 

RTD

 

 

 

RL

 

 

 

 

XTR112: IR = 250 A

XTR114: IR = 100 A

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 •mmediateI Product Info: (800) 548-6132

®

© 1998 Burr-Brown Corporation

PDS-1473A

XTR112, XTR114

1998

Printed in U.S.A. December,

 

SBOS101

SPECIFICATIONS

At TA = +25°C, V+ = 24V, and TIP29C external transistor, unless otherwise noted.

 

 

 

 

 

XTR112U

 

 

XTR112UA

 

 

 

 

 

 

 

 

XTR114U

 

 

XTR114UA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PARAMETER

CONDITIONS

MIN

 

TYP

MAX

MIN

 

TYP

 

MAX

UNITS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Current Equation

 

 

 

IO = VIN • (40/RG) + 4mA, VIN in

Volts, RG in Ω

 

 

A

Output Current, Specified Range

 

 

4

 

 

20

 

 

 

 

 

 

mA

Over-Scale Limit

 

24

 

27

30

 

 

 

 

 

mA

Under-Scale Limit: XTR112

IREG = 0

0.9

 

1.3

1.7

 

 

 

 

 

mA

XTR114

 

0.6

 

1

1.4

 

 

 

 

 

mA

ZERO OUTPUT(1)

VIN = 0V, RG =

 

 

 

4

±25

 

 

 

 

±50

 

mA

Initial Error

 

 

 

 

±5

 

 

 

 

 

μA

vs Temperature

 

 

 

 

±0.07

±0.5

 

 

 

 

±0.9

 

μA/°C

vs Supply Voltage, V+

V+ = 7.5V to 36V

 

 

 

0.04

0.2

 

 

 

 

 

μA/V

vs Common-Mode Voltage

VCM = 1.25V to 3.5V(2)

 

 

 

0.02

 

 

 

 

 

 

 

μA/V

vs VREG Output Current

 

 

 

 

0.3

 

 

 

 

 

 

 

μA/mA

Noise: 0.1Hz to 10Hz

 

 

 

 

0.03

 

 

 

 

 

 

 

μAp-p

SPAN

 

 

 

 

 

 

 

 

 

 

 

 

 

Span Equation (transconductance)

 

 

 

 

S = 40/RG

±0.2

 

 

 

 

±0.4

 

A/V

Initial Error (3)

Full Scale (VIN) = 50mV

 

 

 

±0.05

 

 

 

 

 

%

vs Temperature(3)

 

 

 

 

±3

±25

 

 

 

 

 

ppm/°C

Nonlinearity: Ideal Input (4)

Full Scale (V ) = 50mV

 

 

 

0.003

0.01

 

 

 

 

 

%

 

IN

 

 

 

 

 

 

 

 

 

 

 

 

INPUT(5)

 

 

 

 

±50

±100

 

 

 

 

±250

 

μV

Offset Voltage

VCM = 2V

 

 

 

 

 

 

 

 

vs Temperature

 

 

 

 

±0.4

±1.5

 

 

 

 

±3

 

μV/°C

vs Supply Voltage, V+

V+ = 7.5V to 36V

 

 

 

±0.3

±3

 

 

 

 

 

μV/V

vs Common-Mode Voltage,

VCM = 1.25V to 3.5V(2)

 

 

 

±10

±50

 

 

 

 

±100

 

μV/V

RTI (CMRR)

 

 

 

 

 

 

 

 

 

 

 

 

 

Common-Mode Input Range(2)

 

1.25

 

 

3.5

 

 

 

 

 

V

Input Bias Current

 

 

 

 

5

25

 

 

 

 

50

 

nA

vs Temperature

 

 

 

 

20

±3

 

 

 

 

±10

 

pA/°C

Input Offset Current

 

 

 

 

±0.2

 

 

 

 

 

nA

vs Temperature

 

 

 

 

5

 

 

 

 

 

 

 

pA/°C

Impedance: Differential

 

 

 

 

0.1 || 1

 

 

 

 

 

 

 

GΩ || pF

Common-Mode

 

 

 

 

5 || 10

 

 

 

 

 

 

 

GΩ || pF

Noise: 0.1Hz to 10Hz

 

 

 

 

0.6

 

 

 

 

 

 

 

μVp-p

CURRENT SOURCES

VO = 2V(6)

 

 

 

 

 

 

 

 

 

 

 

μA

Current: XTR112

 

 

 

 

250

 

 

 

 

 

 

 

XTR114

 

 

 

 

100

±0.2

 

 

 

 

±0.4

 

μA

Accuracy

 

 

 

 

±0.05

 

 

 

 

 

%

vs Temperature

 

 

 

 

±15

±35

 

 

 

 

±75

 

ppm/°C

vs Power Supply, V+

V+ = 7.5V to 36V

 

 

 

±10

±25

 

 

 

 

 

ppm/V

Matching

 

 

 

 

±0.02

±0.1

 

 

 

 

±0.2

 

%

vs Temperature

 

 

 

 

±3

±15

 

 

 

 

±30

 

ppm/°C

vs Power Supply, V+

V+ = 7.5V to 36V

 

 

 

1

10

 

 

 

 

 

ppm/V

Compliance Voltage, Positive

 

(V+) –3

 

(V+) –2.5

 

 

 

 

 

 

 

V

Negative(2)

 

0

 

–0.2

 

 

 

 

 

 

 

V

Output Impedance: XTR112

 

 

 

 

500

 

 

 

 

 

 

 

MΩ

XTR114

 

 

 

 

1.2

 

 

 

 

 

 

 

GΩ

Noise: 0.1Hz to 10Hz: XTR112

 

 

 

 

0.001

 

 

 

 

 

 

 

μAp-p

XTR114

 

 

 

 

0.0004

 

 

 

 

 

 

 

μAp-p

(2)

 

 

 

 

5.1

 

 

 

 

 

 

 

V

VREG

 

 

 

 

±0.1

 

 

 

 

 

Accuracy

 

 

 

 

±0.02

 

 

 

 

 

V

vs Temperature

 

 

 

 

±0.2

 

 

 

 

 

 

 

mV/°C

vs Supply Voltage, V+

 

 

 

 

1

 

 

 

 

 

 

 

mV/V

Output Current: XTR112

 

 

 

 

–1, +2.1

 

 

 

 

 

 

 

mA

XTR114

 

 

 

 

–1, +2.4

 

 

 

 

 

 

 

mA

Output Impedance

 

 

 

 

75

 

 

 

 

 

 

 

Ω

LINEARIZATION

 

 

 

 

 

 

 

 

 

 

 

 

kΩ

RLIN (internal)

 

 

 

 

1

±0.5

 

 

 

 

±1

 

Accuracy

 

 

 

 

±0.2

 

 

 

 

 

%

vs Temperature

 

 

 

 

±25

±100

 

 

 

 

 

ppm/°C

POWER SUPPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

Specified Voltage

 

 

 

 

+24

 

 

 

 

 

 

 

V

Operating Voltage Range

 

+7.5

 

 

+36

 

 

 

 

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE RANGE

 

 

 

 

 

 

 

 

 

 

 

 

°C

Specification, TMIN to TMAX

 

–40

 

 

+85

 

 

 

 

 

Operating/Storage Range

 

–55

 

 

+125

 

 

 

 

 

°C

Thermal Resistance, θJA

 

 

 

 

 

 

 

 

 

 

 

 

°C/W

SO-14 Surface-Mount

 

 

 

 

100

 

 

 

 

 

 

 

Specification same as XTR112U, XTR114U.

NOTES: (1) Describes accuracy of the 4mA low-scale offset current. Does not include input amplifier effects. Can be trimmed to zero. (2) Voltage measured with respect to IRET pin. (3) Does not include initial error or TCR of gain-setting resistor, RG. (4) Increasing the full-scale input range improves nonlinearity. (5) Does not include Zero Output initial error. (6) Current source output voltage with respect to IRET pin.

®

 

XTR112, XTR114

2

 

PIN CONFIGURATION

 

 

ABSOLUTE MAXIMUM RATINGS(1)

 

 

 

 

 

 

 

 

 

 

 

 

Top View

 

 

 

 

SO-14

Power Supply, V+ (referenced to IO pin) ..........................................

40V

 

 

 

 

 

 

 

Input Voltage, V+ , V

(referenced to I pin) ............................

0V to V+

 

 

 

 

 

 

 

IN

IN

O

–55°C to +125°C

 

 

XTR112 and XTR114

 

 

Storage Temperature Range .......................................

 

 

 

 

Lead Temperature (soldering, 10s) ..............................................

+300°C

 

 

 

 

 

 

 

Output Current Limit

...............................................................

 

Continuous

IR1

1

 

 

14

IR2

...................................................................Junction Temperature

 

+165°C

 

 

 

 

 

 

V

 

 

 

 

V+

NOTE: (1) Stresses above these ratings may cause permanent damage.

 

 

 

2

 

 

13

IN

 

 

 

 

IN

Exposure to absolute maximum conditions for extended periods may degrade

 

 

 

 

 

 

 

RG

3

 

 

12

VLIN

device reliability.

 

 

 

 

 

 

 

 

 

 

 

 

RG

4

 

 

11

VREG

ELECTROSTATIC

 

 

 

 

 

NC

5

 

 

10

V+

 

 

 

 

 

 

 

DISCHARGE SENSITIVITY

 

 

 

 

 

 

 

IRET

6

 

 

9

B (Base)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IO

7

 

 

8

E (Emitter)

This integrated circuit can be damaged by ESD. Burr-Brown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

recommends that

all integrated circuits

be handled with

 

 

NC = No Connection

 

 

appropriate precautions. Failure to observe proper handling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and installation procedures can cause damage.

ESD damage can range from subtle performance degradation 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.

PACKAGE/ORDERING INFORMATION

 

 

 

PACKAGE

SPECIFIED

 

 

 

CURRENT

 

DRAWING

TEMPERATURE

ORDERING

TRANSPORT

PRODUCT

SOURCES

PACKAGE

NUMBER(1)

RANGE

NUMBER(2)

MEDIA

XTR112U

2 x 250μA

SO-14 Surface Mount

235

–40°C to +85°C

XTR112U

Rails

"

"

"

"

"

XTR112U/2K5

Tape and Reel

XTR112UA

2 x 250μA

SO-14 Surface Mount

235

–40°C to +85°C

XTR112UA

Rails

"

"

"

"

"

XTR112UA/2K5

Tape and Reel

 

 

 

 

 

 

 

XTR114U

2 x 100μA

SO-14 Surface Mount

235

–40°C to +85°C

XTR114U

Rails

"

"

"

"

"

XTR114U/2K5

Tape and Reel

XTR114UA

2 x 100μA

SO-14 Surface Mount

235

–40°C to +85°C

XTR114UA

Rails

"

"

"

"

"

XTR114UA/2K5

Tape and Reel

 

 

 

 

 

 

 

NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “XTR112UA/2K5” will get a single 2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

®

3

XTR112, XTR114

 

 

FUNCTIONAL BLOCK DIAGRAM

 

 

VLIN

 

 

 

XTR112: IR1 = IR2 = 250 A

 

 

I

R1

 

 

XTR114: IR1 = IR2 = 100 A

 

 

 

 

 

 

 

 

 

 

12

1

IR2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

VREG

 

 

 

 

 

 

IR1

IR2

 

V+

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

13

 

 

 

10

 

 

V+

 

 

 

5.1V

 

 

 

 

 

 

 

 

 

IN

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

RLIN

 

 

 

 

B

Q1

 

 

1kΩ

 

100 A

 

 

9

 

 

 

 

 

 

 

 

RG

 

 

 

 

 

 

 

 

3

 

 

 

 

E

 

 

 

 

 

VIN

 

 

 

 

 

 

 

 

 

8

 

 

 

2

I = 100 A +

 

 

 

V

 

RG

 

 

 

 

IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

975Ω

 

25Ω

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

IO

= 4mA + VIN

( 40 )

 

 

 

 

 

 

 

R

G

 

 

6

 

 

 

 

 

 

IRET

®

 

XTR112, XTR114

4

 

TYPICAL PERFORMANCE CURVES

At TA = +25°C, and V+ = 24V, unless otherwise noted.

 

 

TRANSCONDUCTANCE vs FREQUENCY

 

 

 

50

 

 

 

 

 

 

 

 

 

 

RG = 500Ω

 

 

 

 

 

 

 

 

mA/V)

 

 

 

 

 

RG = 125Ω

 

 

40

 

 

 

 

 

 

 

 

20mA

 

 

 

 

 

 

 

 

Log

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transconductance(20

30

 

 

 

 

 

 

 

 

4mA/div

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

RG = 2kΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

4mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1M

 

100

1k

10k

100k

Frequency (Hz)

STEP RESPONSE

RG = 2kΩ

RG = 125Ω

25μs/div

COMMON-MODE REJECTION RATIO vs FREQUENCY

POWER-SUPPLY REJECTION RATIO vs FREQUENCY

 

110

 

100

(dB)

90

Ratio

80

Rejection

70

 

Mode-

60

50

Common

40

 

30

20

10

 

 

 

 

 

140

 

 

 

 

 

 

 

 

 

(dB)

120

 

 

RG = 125Ω

 

 

 

 

 

Ratio

100

 

 

 

 

 

RG = 125Ω

Rejection

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply

60

 

RG = 2kΩ

 

 

 

 

 

RG = 2kΩ

 

40

 

 

 

 

 

 

 

 

Power

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

10

100

1k

10k

100k

1M

100

1k

10k

100k

1M

 

 

Frequency (Hz)

 

 

 

 

 

 

 

 

 

Frequency (Hz)

 

 

 

 

 

 

 

 

Over-Scale Current (mA)

OVER-SCALE CURRENT vs TEMPERATURE

29

With External Transistor

28

27

V+ = 36V

26

V+ = 7.5V

25

V+ = 24V

24

23

–75

–50

–25

0

25

50

75

100

125

 

 

 

Temperature (°C)

 

 

 

UNDER-SCALE CURRENT vs TEMPERATURE

 

1.45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(mA)

1.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XTR112

 

 

 

 

 

 

 

 

 

 

 

 

 

1.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Scale-

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Under

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

XTR114

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.95

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–75

–50

–25

0

25

50

75

100

125

 

 

 

 

 

 

 

Temperature (°C)

 

 

 

 

 

 

®

5

XTR112, XTR114

 

 

TEXAS INSTRUMENTS XTR112, XTR1144 Technical data

TYPICAL PERFORMANCE CURVES (CONT)

At TA = +25°C, and V+ = 24V, unless otherwise noted.

INPUT VOLTAGE AND CURRENT

NOISE DENSITY vs FREQUENCY

10k

 

 

 

 

10k

 

10k

1k

 

 

 

 

1k

Noise (pA/ÖHz)

1k

 

 

 

 

Current Noise

 

 

100

 

 

 

 

100

100

Hz)(nV/NoiseVoltageÖ

 

 

 

 

Hz)(fA/NoiseCurrentÖ

 

Input

 

 

 

 

Input

 

 

10

 

 

Voltage Noise

10

 

10

 

 

 

 

 

1

10

100

1k

10k

100k

 

 

ZERO OUTPUT AND REFERENCE

CURRENT NOISE vs FREQUENCY

 

 

 

Zero Output Current

 

 

 

 

 

 

 

XTR112

 

 

 

Reference Current

 

 

 

XTR114

 

 

 

 

1

10

100

1k

10k

100k

Frequency (Hz)

Frequency (Hz)

INPUT BIAS AND OFFSET CURRENT vs TEMPERATURE

 

25

 

 

 

 

 

 

 

 

(nA)

20

 

 

 

 

 

 

 

 

Current

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

+IB

Offset

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bias and

10

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

–IB

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IOS

 

 

0

 

 

 

 

 

 

 

 

 

–75

–50

–25

0

25

50

75

100

125

Temperature (°C)

 

 

 

 

INPUT OFFSET VOLTAGE DRIFT

 

 

 

 

 

 

 

 

 

PRODUCTION DISTRIBUTION

 

 

 

 

 

80

 

 

 

 

 

 

Typical production distribution

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

of packaged units. XTR112 and

 

 

60

 

 

 

 

 

 

 

XTR114 included.

 

 

 

(%)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Units

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Percent

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

 

 

 

 

 

Input Offset Voltage Drift ( V/°C)

 

 

 

 

ZERO OUTPUT CURRENT ERROR vs TEMPERATURE

 

4

(µA)

2

0

Error

–2

Current

–4

Output

–6

 

Zero

–8

–10

 

 

–12

–75

–50

–25

0

25

50

75

100

125

Temperature (°C)

 

 

 

 

 

 

 

ZERO OUTPUT DRIFT

 

 

 

 

 

 

 

 

 

 

 

 

PRODUCTION DISTRIBUTION

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

Typical production distribution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

 

 

 

 

 

 

 

 

 

of packaged units. XTR112

 

 

30

 

 

 

 

 

 

 

 

 

 

and XTR114 included.

 

 

(%)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Units

25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Percent

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

0.225

0.25

0.275

0.3

0.325

0.35

0.375

0.4

0.425

0.45

0.475

0.5

 

 

 

 

 

 

 

Zero Output Drift ( A/°C)

 

 

 

 

 

 

®

 

XTR112, XTR114

6

 

Loading...
+ 12 hidden pages