Burr Brown XTR104BU, XTR104BP, XTR104AU-1K, XTR104AU, XTR104AP Datasheet

1

®

XTR104

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Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

XTR104

4-20mA Current Transmitter with

BRIDGE EXCITATION AND LINEARIZATION

APPLICATIONS

● INDUSTRIAL PROCESS CONTROL

● FACTORY AUTOMATION

● SCADA

● WEIGHTING SYSTEMS

● ACCELEROMETERS

FEATURES

● LESS THAN ±1% TOTAL ADJUSTED

ERROR, –40

°C TO +85°C

● BRIDGE EXCITATION AND LINEARIZATION

● WIDE SUPPLY RANGE: 9V to 40V

● LOW SPAN DRIFT: 50ppm/

°C max

● HIGH PSR: 110dB min

● HIGH CMR: 80dB min

DESCRIPTION

The XTR104 is a monolithic 4-20mA, two-wire cur­rent transmitter integrated circuit designed for bridge
input signals. It provides complete bridge excitation,
instrumentation amplifier, linearization, and current
output circuitry necessary for high impedance strain
gage sensors.

The instrumentation amplifier can be used over a wide
range of gain, accommodating a variety of input signals
and sensors. Total adjusted error of the complete current
transmitter, including the linearized bridge is less than
±1% over the full –40°C to +85°C temperature range.
This includes zero drift, span drift and non-linearity for
bridge outputs as low as 10mV. The XTR104 operates
on loop power supply voltages down to 9V.

Linearization circuitry consists of a second, fully inde­pendent instrumentation amplifier that controls the bridge
excitation voltage. It provides second-order correction
to the transfer function, typically achieving a 20:1
improvement in nonlinearity, even with low cost trans­ducers.

The XTR104 is available in 16-pin plastic DIP and
SOL-16 surface-mount packages specified for the
–40°C to +85°C temperature range.

XTR104

R

G

R

L

4-20 mA

R

LIN

9V to 40V

–

+

V

O

V

PS

BRIDGE NONLINEARITY CORRECTION

USING XTR104

0mV

Bridge Output

10mV

2.0

1.5

1.0

0.5

0

–0.5

Uncorrected
Bridge Output

Corrected

5mV

Nonlinearity (%)

®

©

1992 Burr-Brown Corporation PDS-1146B Printed in U.S.A. September, 1993

2

®

XTR104

XTR104BP, BU XTR104AP, AU
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
OUTPUT

Output Current Equation A
Total Adjusted Error

(1)

T

MIN

to T

MAX

, VFS ≥ 10mV, RB = 5kΩ±1 ±2 % of FS
Current, Specified Range 4 20 * * mA
Over-Scale Limit 34 40 * * mA
Under Scale-Limit 3.6 3.8 * * mA
Full Scale Output Error V

IN

= 1V, RG = ∞±15 ±50 * ±100 µA

Noise: 0.1Hz to 1kHz R

G

= 40Ω 8*µAp-p

ZERO OUTPUT

(2)

VIN = 0V, RG = ∞ 4*mA
Initial Error ±5 ±50 * ±100 µA
vs Temperature ±0.2 ±0.5 * ±1 µA/°C
vs Supply Voltage, V+ V+ = 9V to 40V

(3)

0.5 2 * * µA/V

vs Common-Mode Voltage V

CM

= 2V to 3V

(3)

0.1 2 * * µA/V

SPAN

Span Equation (Transconductance) * A/V
Untrimmed Error R

G

≥ 75Ω±0.1 ±1**%

vs Temperature

(4)

±20 ±50 * ±100 ppm/°C

Nonlinearity: Ideal Input 0.01 * %

Bridge Input

(5)

0.1 * %

INPUT

Differential Range 1*V
Input Voltage Range

(3)

23**V

Common-Mode Rejection V

IN

= 2V to 3V

(3)

80 100 * * dB
Impedance: Differential 3 * GΩ
Common-Mode 0.5 * GΩ
Offset Voltage ±0.5 ±2.5 * * mV
vs Temperature 1 2.5 2 5 µV/°C
vs Supply Voltage, V+ V+ = 9V to 40V

(3)

110 130 * * dB
Input Bias Current 100 250 * * nA
vs Temperature 0.1 2 * * nA/°C
Input Offset Current 2 20 * * nA
vs Temperature 0.01 0.25 * * nA/°C

VOLTAGE REFERENCE

(6)

Voltage 5*V
Accuracy ±0.25 ±0.5 * ±1%
vs Temperature ±10 ±50 * ±100 ppm/°C
vs Supply Voltage, V+ V+ = 9V to 40V

(3)

5 * ppm/V

vs Load I

L

= 0 to 2mA 50 * ppm/mA

POWER SUPPLY

Voltage Range

(3)

, V+ 9 40 * * V

TEMPERATURE RANGE

Specification (T

MIN

to T

MAX

) –40 85 * * °C

Operating Derated Performance –40 125 * * °C

θ

JA

80 * °C/W

IO = VIN • (0.016 + 40/RG) + 4mA VIN in Volts, RG in Ω

* Specification same as XTR104BP.
NOTES: (1) Includes corrected second-order nonlinearity of bridge, and over-temperature zero and span effects. Does not include initial offset and span errors which
are normally trimmed to zero at 25°C. (2) Describes accuracy of the 4mA low-scale current. Does not include input amplifier effects. Can be trimmed to zero.
(3) Voltage measured with respect to I

O

pin. (4) Does not include TCR of gain-setting resistor, RG. (5) When configured to correct for ≤2% second-order bridge sensor

nonlinearity. (6) Measured with R

LIN

= ∞ to disable linearization feature.

S = 0.016 + 40/R

G

SPECIFICATIONS

TA = +25°C, V+ = 24V, and 2N6121 external transistor, unless otherwise noted.

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XTR104

ABSOLUTE MAXIMUM RATINGSPIN CONFIGURATION

Power Supply, V+ (referenced to IO pin) .......................................... 40V

Input Voltage, V

+

IN

, V

–

IN

, V

+

LIN

, V

–

LIN

(referenced to IO pin) ... 0V to V+

Storage Temperature Range ........................................ –55°C to +125°C

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

Output Current Limit ............................................................... Continuous

Junction Temperature ................................................................... +165°C

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.

V

+

IN



V

–

IN



V

+

LIN



V

–

LIN



R

G



R

G



I

O



R

LIN




Zero Adjust
Zero Adjust
Zero Adjust



B (Base)
V

REF


E (Emitter)
V+
R

LIN





1
2
3
4
5
6
7
8



16
15
14
13
12
11
10

9

PACKAGE INFORMATION

PACKAGE DRAWING

MODEL PACKAGE NUMBER

(1)

XTR104AP 16-Pin Plastic DIP 180
XTR104BP 16-Pin Plastic DIP 180
XTR104AU SOL-16 Surface Mount 211
XTR104BU SOL-16 Surface Mount 211

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.

TEMPERATURE

MODEL PACKAGE RANGE

XTR104AP 16-pin Plastic DIP –40°C to +85°C
XTR104BP 16-pin Plastic DIP –40°C to +85°C
XTR104AU SOL-16 Surface Mount –40°C to +85°C
XTR104BU SOL-16 Surface Mount –40°C to +85°C

ORDERING INFORMATION

Top View DIP

ELECTROSTATIC
DISCHARGE SENSITIVITY

Electrostatic discharge can cause damage ranging from per­formance degradation to complete device failure. Burr-Brown
Corporation recommends that all integrated circuits be handled
and stored using appropriate ESD protection methods.

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 published speci­fications.

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®

XTR104

DICE INFORMATION

XTR104 DIE TOPOGRAPHY

PAD FUNCTION

9R

LIN

10 V+
11 E (Emitter)

12A, 12B V

REF

13 B (Base)
14 Zero Adj.
15 Zero Adj.
16 Zero Adj.

PAD FUNCTION

1V

+

IN

2V

–

IN

3V

+

LIN

4V

–

LIN

5R

G

6R

G

7I

O

8R

LIN

Pads 12A and 12B must be connected.

NC: No Connection
Substrate Bias: Internally connected to the I

O

terminal

(#7).

FPO

MECHANICAL INFORMATION

MILS (0.001") MILLIMETERS

Die Size 168 x 104 ±5 4.27 x 2.64 ±0.13
Die Thickness 20 ±3 0.51 ±0.08
Min. Pad Size 4 x 4 0.1 x 0.1

Backing None

TYPICAL PERFORMANCE CURVES

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

100 1k 10k 100k

0

Frequency (Hz)

TRANSCONDUCTANCE vs FREQUENCY

1M

80

60

40

20

Transconductance (20 Log mA/V)

RG = 25Ω
RG = 100Ω

R

G

= 400Ω

R

G

= 2kΩ

R

G

= ∞

4mA

20mA

RG = 25Ω

R

G

= ∞

STEP RESPONSE

100µs/Div

5mA/Div