Burr Brown INA105KU, INA105KP, INA105BM, INA105AM, INA105KU-2K5 Datasheet
©
1985 Burr-Brown Corporation PDS-617G Printed in U.S.A. August, 1993
Precision Unity Gain
DIFFERENTIAL AMPLIFIER
INA105
DESCRIPTION
The INA105 is a monolithic Gain = 1 differential
amplifier consisting of a precision op amp and on-chip
metal film resistors. The resistors are laser trimmed
for accurate gain and high common-mode rejection.
Excellent TCR tracking of the resistors maintains
gain accuracy and common-mode rejection over
temperature.
The differential amplifier is the foundation of many
commonly used circuits. The INA105 provides this
precision circuit function without using an expensive
precision resistor network. The INA105 is available in
8-pin plastic DIP, SO-8 surface-mount and TO-99
metal packages.
Sense
V+
Output
V–
Ref
–In
+In
5
7
6
4
1
2
3
25kΩ 25kΩ
25kΩ25kΩ
®
FEATURES
● CMR 86dB min OVER TEMPERATURE
● GAIN ERROR: 0.01% max
● NONLINEARITY: 0.001% max
● NO EXTERNAL ADJUSTMENTS
REQUIRED
● EASY TO USE
● COMPLETE SOLUTION
● HIGHLY VERSATILE
● LOW COST
● PLASTIC DIP, TO-99 HERMETIC METAL,
AND SO-8 SOIC PACKAGES
APPLICATIONS
● DIFFERENTIAL AMPLIFIER
● INSTRUMENTATION AMPLIFIER
BUILDING BLOCK
● UNITY-GAIN INVERTING AMPLIFIER
● GAIN-OF-1/2 AMPLIFIER
● NONINVERTING GAIN-OF-2 AMPLIFIER
● AVERAGE VALUE AMPLIFIER
● ABSOLUTE VALUE AMPLIFIER
● SUMMING AMPLIFIER
● SYNCHRONOUS DEMODULATOR
● CURRENT RECEIVER WITH COMPLIANCE
TO RAILS
● 4mA TO 20mA TRANSMITTER
● VOLTAGE-CONTROLLED CURRENT
SOURCE
● ALL-PASS FILTERS
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
INA105
2
INA105AM INA105BM INA105KP, KU
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
SPECIFICATIONS
ELECTRICAL
At +25°C, VCC = ±15V, unless otherwise noted.
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.
GAIN
Initial
(1)
1 ✻✻V/V
Error 0.005 0.01 ✻✻ 0.01 0.025 %
vs Temperature 1 5 ✻✻ ✻✻ppm/°C
Nonlinearity
(2)
0.0002 0.001 ✻✻ ✻✻ %
OUTPUT
Rated Voltage I
O
= +20mA, –5mA 10 12 ✻✻ ✻✻ V
Rated Current V
O
= 10V +20, –5 ✻✻ mA
Impedance 0.01 ✻✻Ω
Current Limit To Common +40/–10 ✻✻mA
Capacitive Load Stable Operation 1000 ✻✻pF
INPUT
Impedance
(3)
Differential 50 ✻✻kΩ
Common-Mode 50 ✻✻kΩ
Voltage Range
(4)
Differential ±10 ✻✻ V
Common-Mode ±20 ✻✻ V
Common-Mode Rejection
(5)
TA = T
MIN
to T
MAX
80 90 86 100 72 ✻ dB
OFFSET VOLTAGE RTO
(6), (7)
Initial 50 250 ✻✻ ✻500 µV
vs Temperature 5 20 5 10 ✻✻µV/°C
vs Supply ±V
S
= 6V to 18V 1 25 ✻ 15 ✻✻µV/V
vs Time 20 ✻✻µV/mo
OUTPUT NOISE VOLTAGE RTO
(6), (8)
fB = 0.01Hz to 10Hz 2.4 ✻✻µVp-p
f
O
= 10kHz 60 ✻✻nV/√Hz
DYNAMIC RESPONSE
Small Signal Bandwidth –3dB 1 ✻✻MHz
Full Power Bandwidth V
O
= 20Vp-p 30 50 ✻✻ ✻✻ kHz
Slew Rate 2 3 ✻✻ ✻✻ V/µs
Settling Time: 0.1% V
O
= 10V Step 4 ✻✻µs
0.01% V
O
= 10V Step 5 ✻✻µs
0.01% V
CM
= 10V Step, V
DIFF
= 0V 1.5 ✻✻µs
POWER SUPPLY
Rated ±15 ✻✻V
Voltage Range Derated Performance ±5 ±18 ✻✻✻✻V
Quiescent Current V
O
= 0V ±1.5 ±2 ✻✻ ✻✻ mA
TEMPERATURE RANGE
Specification –40 +85 ✻✻✻✻°C
Operation –55 +125 ✻✻–40 +85 °C
Storage –65 +150 ✻✻–40 +125 °C
✻ Specification same as for INA105AM.
NOTES: (1) Connected as difference amplifier (see Figure 4). (2) Nonlinearity is the maximum peak deviation from the best-fit straight line as a percent of full-scale peak-
to-peak output. (3) 25kΩ resistors are ratio matched but have ±20% absolute value. (4) Maximum input voltage without protection is 10V more than either ±15V supply
(±25V). Limit I
IN
to 1mA. (5) With zero source impedance (see “Maintaining CMR” section). (6) Referred to output in unity-gain difference configuration. Note that this
circuit has a gain of 2 for the operational amplifier’s offset voltage and noise voltage. (7) Includes effects of amplifier’s input bias and offset currents. (8) Includes effects
of amplifier’s input current noise and thermal noise contribution of resistor network.
®
INA105
3
PIN CONFIGURATIONS
Top View TO-99
INA105AM
INA105BM
NOTE: (1) Performance grade identifier box for small outline surface mount.
Blank indicates K grade. Part is marked INA105U.
Ref
–In
+In
V–
No Internal Connection
V+
Output
Sense
1
2
3
4
8
7
6
5
(1)
8
7
62
1
3
4
5
Tab
No Internal
Connection
Output
V+
V–
Sense
Ref
–In
+In
Case internall
y
connected to V–. Make no connection.
Top View DIP/SOIC
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.
ABSOLUTE MAXIMUM RATINGS
Supply ................................................................................................±18V
Input Voltage Range ............................................................................ ±V
S
Operating Temperature Range: M .................................. –55°C to +125°C
P, U................................ –40°C to +85°C
Storage Temperature Range: M ..................................... –65°C to +150°C
P, U ................................. –40°C to +125°C
Lead Temperature (soldering, 10s) M, P ....................................... +300°C
Wave Soldering (3s, max) U .......................................................... +260°C
Output Short Circuit to Common.............................................. Continuous
PACKAGE
DRAWING TEMPERATURE
PRODUCT PACKAGE NUMBER
(1)
RANGE
INA105AM TO-99 Metal 001 –40°C to +85°C
INA105BM TO-99 Metal 001 –40°C to +85°C
INA105KP 8-Pin Plastic DIP 006 –40°C to +85°C
INA105KU 8-Pin SOIC 182 –40°C to +85°C
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
PACKAGE/ORDERING INFORMATION
®
INA105
4
SMALL SIGNAL RESPONSE
(No Load)
Time (µs)
Output Voltage (mV)
0510
+50
0
–50
STEP RESPONSE
Time (µs)
Output Voltage (V)
–10 to +10
0 4 8 12 16
SMALL SIGNAL RESPONSE
(R
LOAD
= , C
LOAD
= 1000pF)
Time (µs)
Output Voltage (mV)
0510
+50
0
–50
Ω
∞
MAXIMUM V
OUT
vs I
OUT
(Negative Swing)
–I
OUT
(mA)
0
V
OUT
(V)
–17.5
–15
–12.5
–10
–7.5
–5
–2.5
0
–2 –4 –6 –8 –10 –12
VS = ±5V
VS = ±12V
VS = ±15V
VS = ±18V
CMR vs FREQUENCY
Frequency (Hz)
10
CMR (dB)
110
100
90
80
70
60
100 1k 10k 100k
AM, KP, U
BM
MAXIMUM V
OUT
vs I
OUT
(Positive Swing)
I
OUT
(mA)
0
V
OUT
(V)
17.5
15
12.5
10
7.5
5
2.5
0
6 1218243036
VS = ±5V
VS = ±12V
VS = ±15V
VS = ±18V
TYPICAL PERFORMANCE CURVES
At TA = 25°C, VS = ±15V, unless otherwise noted.
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