Burr Brown XTR106UA-2K5, XTR106UA, XTR106U, XTR106U-2K5, XTR106PA Datasheet

®

XTR106

XTR106

XTR106

4-20mA CURRENT TRANSMITTER

with Bridge Excitation and Linearization

FEATURES

● LOW TOTAL UNADJUSTED ERROR

● 2.5V, 5V BRIDGE EXCITATION REFERENCE

● 5.1V REGULATOR OUTPUT

● LOW SPAN DRIFT: ±25ppm/°C max

● LOW OFFSET DRIFT: 0.25µV/°C

● HIGH PSR: 110dB min

● HIGH CMR: 86dB min

● WIDE SUPPLY RANGE: 7.5V to 36V

● 14-PIN DIP AND SO-14 SURFACE-MOUNT

DESCRIPTION

The XTR106 is a low cost, monolithic 4-20mA, two­wire current transmitter designed for bridge sensors. It
provides complete bridge excitation (2.5V or 5V refer­ence), instrumentation amplifier, sensor linearization,
and current output circuitry. Current for powering ad­ditional external input circuitry is available from the
V

pin.

REG

The instrumentation amplifier can be used over a wide
range of gain, accommodating a variety of input signal
types and sensors. Total unadjusted error of the com­plete current transmitter, including the linearized bridge,
is low enough to permit use without adjustment in many
applications. The XTR106 operates on loop power sup­ply voltages down to 7.5V.

Linearization circuitry provides second-order correction
to the transfer function by controlling bridge excitation
voltage. It provides up to a 20:1 improvement in
nonlinearity, even with low cost transducers.

The XTR106 is available in 14-pin plastic DIP and
SO-14 surface-mount packages and is specified for the
–40°C to +85°C temperature range. Operation is from
–55°C to +125°C.

APPLICATIONS

● PRESSURE BRIDGE TRANSMITTER

● STRAIN GAGE TRANSMITTER

● TEMPERATURE BRIDGE TRANSMITTER

● INDUSTRIAL PROCESS CONTROL

● SCADA REMOTE DATA ACQUISITION

● REMOTE TRANSDUCERS

● WEIGHING SYSTEMS

● ACCELEROMETERS

2.0

1.5

1.0

0.5

Nonlinearity (%)

–0.5

5V

0

0mV

BRIDGE NONLINEARITY CORRECTION

V

5

REF

R

V

REF

+

G

USING XTR106

5mV

Bridge Output

(5.1V)

V

REG

2.5V

XTR106

Corrected

R

LIN

7.5V to 36V

Uncorrected
Bridge Output

4-20mA

10mV

V

PS

V

O

R

L

–

I

RET

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

©

1998 Burr-Brown Corporation PDS-1449A Printed in U.S.A. June, 1998

Polarity

Lin

I

OUT

SPECIFICATIONS

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

XTR106P, U XTR106PA, UA
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
OUTPUT

Output Current Equation I
Output Current, Specified Range 4 20 ✻✻mA
Over-Scale Limit I
Under-Scale Limit I

ZERO OUTPUT

(1)

Initial Error ±5 ±25 ✻ ±50 µA

vs Temperature T
vs Supply Voltage, V+ V+ = 7.5V to 36V 0.04 0.2 ✻✻ µA/V
vs Common-Mode Voltage

(IO) 0.8 ✻ µA/mA

vs V

REG

Noise: 0.1Hz to 10Hz i

(CMRR)

OVER

UNDER

I

ZERO

O

I

= 0, I

I

REF

REG

+ I

= 0 1 1.6 2.2 ✻✻✻ mA

REF

= 2.5mA 2.9 3.4 4 ✻✻✻ mA

REG

VIN = 0V, RG = ∞ 4 ✻ mA

= –40°C to +85°C ±0.07 ±0.9 ✻✻ µA/°C

A

VCM = 1.1V to 3.5V

n

(5)

SPAN

Span Equation (Transconductance) S
Untrimmed Error Full Scale (V
vs Temperature
Nonlinearity: Ideal Input

INPUT

Offset Voltage V

vs Temperature T
vs Supply Voltage, V+ V+ = 7.5V to 36V ±0.1 ±3 ✻✻ µV/V

vs Common-Mode Voltage, RTI CMRR V
Common-Mode Range
Input Bias Current I

vs Temperature T
Input Offset Current I

vs Temperature T
Impedance: Differential Z

Noise: 0.1Hz to 10Hz V

VOLTAGE REFERENCES

(2)

(3)

(4)

(5)

Common-Mode 5 || 10 ✻ GΩ || pF

(5)

TA = –40°C to +85°C ±3 ±25 ✻✻ ppm/°C

Full Scale (VIN) = 50mV ±0.001 ±0.01 ✻✻ %

OS

V

CM

OS

IN

= –40°C to +85°C ±0.25 ±1.5 ✻ ±3 µV/°C

A

CM

B

= –40°C to +85°C20 ✻ pA/°C

A

= –40°C to +85°C5 ✻pA/°C

A

n

Lin Polarity Connected

to V

Initial: 2.5V Reference V

5V Reference V

Accuracy V

vs Temperature T

vs Supply Voltage, V+ V+ = 7.5V to 36V ±5 ±20 ✻✻ ppm/V

vs Load I
Noise: 0.1Hz to 10Hz 10 ✻ µVp-p

(5)

V

REG

Accuracy ±0.02 ±0.1 ✻✻ V

vs Temperature T

vs Supply Voltage, V+ V+ = 7.5V to 36V 1 ✻ mV/V
Output Current I
Output Impedance I

LINEARIZATION

R

(external) Equation R

LIN

K

Linearization Factor K

LIN

(6)

2.5 2.5 ✻ V

REF

55✻V

V

REF

REG

REG

LIN

LIN

REF

= –40°C to +85°C ±20 ±35 ✻ ±75 ppm/°C

A

REF

= –40°C to +85°C ±0.3 ✻ mV/°C

A

REG

Accuracy ±1 ±5 ✻✻ %

vs Temperature T
Max Correctable Sensor Nonlinearity B V

= –40°C to +85°C ±50 ±100 ✻✻ ppm/°C

A

) = 50mV ±0.05 ±0.2 ✻ ±0.4 %

IN

VCM = 2.5V ±50 ±100 ✻ ±250 µV

= 1.1V to 3.5V

, R

REG

(5)

= 0

LIN

= 2.5V or 5V ±0.05 ±0.25 ✻ ±0.5 %

= 0mA to 2.5mA 60 ✻ ppm/mA

= 0mA to 2.5mA 80 ✻ Ω

V

= 5V 6.645 ✻ k Ω

REF

= 2.5V 9.905 ✻ k Ω

V

REF

= 5V ±5 ✻ % of V

REF

V

= 2.5V –2.5, +5 ✻ % of V

REF

POWER SUPPLY V+
Specified +24 ✻ V
Voltage Range +7.5 +36 ✻✻V

TEMPERATURE RANGE

Specification –40 +85 ✻✻°C
Operating –55 +125 ✻✻°C
Storage –55 +125 ✻✻°C
Thermal Resistance

14-Pin DIP 80 ✻ °C/W

θ

JA

SO-14 Surface Mount 100 ✻ °C/W

✻ Specification same as XTR106P, XTR106U.
NOTES: (1) Describes accuracy of the 4mA low-scale offset current. Does not include input amplifier effects. Can be trimmed to zero. (2) Does not include initial

error or TCR of gain-setting resistor, R
measured with respect to I

®

pin. (6) See “Linearization” text for detailed explanation. VFS = full-scale VIN.

RET

. (3) Increasing the full-scale input range improves nonlinearity. (4) Does not include Zero Output initial error. (5) Voltage

G

XTR106

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

A

24 28 30 ✻✻✻ mA

0.02 ✻ µA/V

0.035 ✻ µAp-p

S = 40/R

G

✻ A/V

±10 ±50 ✻ ±100 µV/V

1.1 3.5 ✻✻V
525 ✻50 nA

±0.2 ±3 ✻ ±10 nA

0.1 || 1 ✻ GΩ || pF

0.6 ✻ µVp-p

5.1 ✻ V

See Typical Curves ✻ mA

R

= K

LIN

4B

• , K

LIN

1 – 2B

in Ω, B is nonlinearity relative to V

LIN

FS

Ω

FS
FS

2

PIN CONFIGURATION

Top View DIP and SOIC

1

V

REG

–

2

V

IN

3

R

G

4

R

G

+

5

V

IN

6

I

RET

7

I

O

14
13
12
11
10

9
8

V

5

REF

2.5

V

REF

Lin Polarity
R

LIN

V+
B (Base)
E (Emitter)

ABSOLUTE MAXIMUM RATINGS

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

Input Voltage, V

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

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

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

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

NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.

+

–

, VIN (referenced to I

IN

(1)

pin) ......................... 0V to V+

RET

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
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

DRAWING TEMPERATURE PACKAGE ORDERING TRANSPORT

PRODUCT PACKAGE NUMBER

XTR106P 14-Pin DIP 010 –40°C to +85°C XTR106P XTR106P Rails
XTR106PA 14-Pin DIP 010 –40°C to +85°C XTR106PA XTR106PA Rails
XTR106U SO-14 Surface Mount 235 –40°C to +85°C XTR106U XTR106U Rails

(1)

RANGE MARKING NUMBER

"""""XTR106U/2K5 Tape and Reel

XTR106UA SO-14 Surface Mount 235 –40°C to +85°C XTR106UA XTR106UA Rails

"""""XTR106UA/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 “XTR106U/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.

(2)

MEDIA

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

XTR106

®

FUNCTIONAL DIAGRAM

Lin

Polarity

V

REG

12

R

LIN

11

1

V+

10

14

V

5

REF

13

2.5

V

REF

5

+

V

IN

4

REF

Amp

Bandgap

V

REF

100µA

Lin

Amp

Current

Direction

Switch

5.1V

B
9

R

G

975

3

V

2

–

V

IN

I = 100µA +

IN

R

G

25

Ω

Ω

E
8

®

XTR106

6

I

RET

7

= 4mA + V

I

O

• ( )

IN

40

R

G

4

TYPICAL PERFORMANCE CURVES

10 1k100 10k 100k 1M

Frequency (Hz)

POWER SUPPLY REJECTION vs FREQUENCY

160
140
120
100

80
60
40
20

0

Power Supply Rejection (dB)

RG = 1kΩ

C

OUT

= 0

RG = 50Ω

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

60

RG = 50Ω

50

40

30

RG = 1kΩ

C

C

OUT

C

OUT

connected

C

OUT

between V+ and I

20

TRANSCONDUCTANCE vs FREQUENCY

10

Transconductance (20 log mA/V)

R

= 250Ω

L

0

100 1k 10k 100k 1M

Frequency (Hz)

COMMON-MODE REJECTION vs FREQUENCY

110
100

90
80
70

RG = 1kΩ

RG = 50Ω

60
50

Common-Mode Rejection (dB)

40
30

10 1k100 10k 100k 1M

Frequency (Hz)

= 0.01µF

= 0.01µF

OUT

= 0.033µF

STEP RESPONSE

C

= 0.01µF

RG = 1kΩ

OUT

20mA

O

RG = 50Ω

4mA/div

4mA

50µs/div

INPUT OFFSET VOLTAGE DRIFT

90

PRODUCTION DISTRIBUTION

80
70
60
50
40
30

Percent of Units (%)

20
10

0

0

0.25

0.5

0.75

1.0

Offset Voltage Drift (µV/°C)

INPUT OFFSET VOLTAGE CHANGE

Typical production
distribution of
packaged units.

1.5

1.0

0.5

vs V

REG

VOS vs I

and V

CURRENTS

REF

REG

0

(µV)

–0.5

OS

∆ V

–1.0
–1.5

VOS vs I

REF

–2.0
–2.5

–1.0 –0.5 0 0.5 1.0 1.5 2.0 2.5

1.25

1.5

1.75

2.0

2.25

2.5

2.75

3.0

5

Current (mA)

®

XTR106