Burr-Brown Dual Op. Amp. (rad. hard)

FEATURES
● VERY LOW NOISE: 8nV/√Hz at 10kHz
● LOW V : 500μV max
OS
● LOW DRIFT: 5μV/°C max
● LOW I : 5pA max
B
● FAST SETTLING TIME: 2μs to 0.01%
● UNITY-GAIN STABLE
DESCRIPTION
BIFET ® Difet
National Semiconductor
® Burr-Brown Corp.
®
Precision Dual Difet ®
OPERATIONAL AMPLIFIER
The OPA2107 dual operational amplifier provides
precision Difet performance with the cost and space
savings of a dual op amp. It is useful in a wide range
of precision and low-noise analog circuitry and can be
used to upgrade the performance of designs currently
using BIFET ® type amplifiers.
The OPA2107 is fabricated on a proprietary
dielectrically isolated (Difet ) process. This holds input
bias currents to very low levels without sacrificing
other important parameters, such as input offset voltage,
drift and noise. Laser-trimmed input circuitry
yields excellent DC performance. Superior dynamic
performance is achieved, yet quiescent current is held
to under 2.5mA per amplifier. The OPA2107 is unitygain
stable.
The OPA2107 is available in plastic DIP, metal TO-
99, and SOIC packages. Industrial and Military temperature
range versions are available.
APPLICATIONS
–In
(2, 6)
+In
(3, 5)
Cascode
OPA2107
● DATA ACQUISITION
● DAC OUTPUT AMPLIFIER
● OPTOELECTRONICS
● HIGH-IMPEDANCE SENSOR AMPS
● HIGH-PERFORMANCE AUDIO CIRCUITRY
● MEDICAL EQUIPMENT, CT SCANNERS
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1989 Burr-Brown Corporation PDS-863B Printed in U.S.A. October, 1993
+VS
(8)
Output
(1, 7)
–VS
(4)

SPECIFICATIONS
T A = +25°C, V S = ±15V unless otherwise noted.
®
OPA2107
2
OPA2107AM, SM, AP, AU OPA2107BM
PARAMETER CONDITION MIN TYP MAX MIN TYP MAX UNITS
OFFSET VOLTAGE (1)
Input Offset Voltage VCM = 0V 100 1mV 50 500 μV
Over Specified Temperature 0.5 2 0.2 1 mV
SM Grade 0.8 2.5 mV
Average Drift Over Specified Temperature 3 10 2 5 μV/°C
Power Supply Rejection
INPUT BIAS CURRENT
VS = ±10 to ±18V 80 96 84 100 dB
(1)
Input Bias Current VCM = 0V 4 10 2 5 pA
Over Specified Temperature 0.25 1.5 0.15 1 nA
SM Grade 4 35 nA
Input Offset Current VCM = 0V 1 8 0.5 3 pA
Over Specified Temperature 1 0.5 nA
SM Grade
INPUT NOISE
1 28 nA
Voltage: f = 10Hz RS = 0 30 * nV/√Hz
f = 100Hz 12 * nV/√Hz
f = 1kHz 9 * nV/√Hz
f = 10kHz 8 * nV/√Hz
BW = 0.1 to 10Hz 1.2 * μVp-p
BW = 10 to 10kHz 0.85 * μVrms
Current: f = 0.1Hz thru 20kHz 1.2 0.9 fA/√Hz
BW = 0.1Hz to 10Hz
INPUT IMPEDANCE
23 17 fAp-p
Differential 1013 || 2 * Ω || pF
Common-Mode 1014 INPUT VOLTAGE RANGE
|| 4 * Ω || pF
Common-Mode Input Range ±10.5 ±11 * * V
Over Specified Temperature ±10.2 ±10.5 * * V
SM Grade ±10 ±10.3 V
Common-Mode Rejection
OPEN-LOOP GAIN
VCM = ±10V 80 94 84 100 dB
Open-Loop Voltage Gain VO = ±10V, RL = 2kΩ 82 96 84 100 dB
Over Specified Temperature 80 94 82 96 dB
SM Grade
DYNAMIC RESPONSE
80 92 dB
Slew Rate G = +1 13 18 * * V/μs
Settling Time: 0.1% G = –1, 10V Step 1.5 * μs
0.01% 2 * μs
Gain-Bandwidth Product G = 100 4.5 * MHz
THD + Noise G = +1, f = 1kHz 0.001 * %
Channel Separation
POWER SUPPLY
f = 100Hz, RL = 2kΩ 120 * dB
Specified Operating Voltage ±15 * V
Operating Voltage Range ±4.5 ±18 * * V
Current
OUTPUT
±4.5 ±5 * * mA
Voltage Output RL = 2kΩ ±11 ±12 * * V
Over Specified Temperature ±10.5 ±11.5 * * V
SM Grade ±10.2 ±11.3 V
Short Circuit Current ±10 ±40 * * mA
Output Resistance, Open-Loop 1MHz 70 * Ω
Capacitive Load Stability
TEMPERATURE RANGE
Specification
G = +1 1000 * pF
AP, AU, AM, BM –25 +85 * * °C
SM
Operating
–55 +125 °C
AP, AU –25 +85 °C
AM, BM, SM
Storage
–55 +125 * * °C
AP, AU –40 +125 °C
AM, BM, SM
Thermal Resistance (θJ-A) –65 +150 * * °C
AP 90 °C/W
AU 175 °C/W
AM, BM, SM
* Specifications same as OPA2107AM. NOTE: (1) Specified with devices fully warmed up.
200 * °C/W

ABSOLUTE MAXIMUM RATINGS
Supply Voltage ................................................................................... ±18V
Input Voltage Range ..................................................................... ±V S ±2V
Differential Input Voltage ........................................................ Total V S ±4V
Operating Temperature
M Package .................................................................. –55°C to +125°C
P and U Packages ........................................................ –25°C to + 85°C
Storage Temperature
M Package .................................................................. –65°C to +150°C
P and U Packages ....................................................... –40°C to +125°C
Output Short Circuit to Ground (T A = +25°C) ........................... Continuous
Junction Temperature .................................................................... +175°C
Lead Temperature
M and P Packages (soldering, 10s) ............................................ +300°C
U Package, SOIC (3s) ................................................................ +260°C
ORDERING INFORMATION
MODELS PACKAGE
SPECIFICATION
TEMPERATURE RANGE
OPA2107AP Plastic DIP –25 to +85°C
OPA2107AM Metal TO-99 –25 to +85°C
OPA2107BM Metal TO-99 –25 to +85°C
OPA2107SM Metal TO-99 –55 to +125°C
OPA2107AU SO-8 SOIC –25 to +85°C
PIN CONFIGURATIONS
Out A
1
3
+In A
DICE INFORMATION
Top View – M Package
+V S and Case
8
4
–V S
Out B
7
A B
–In A 2 6 –In B
5
+In B
OPA2107 DIE TOPOGRAPHY
3
PACKAGE INFORMATION
MODELS PACKAGE
PACKAGE DRAWING
NUMBER (1)
OPA2107AP Plastic DIP 006
OPA2107AM Metal TO-99 001
OPA2107BM Metal TO-99 001
OPA2107SM Metal TO-99 001
OPA2107AU SO-8 SOIC 182
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
Out A
–In A
+In A
Top View – P & U Packages
1
2
3
A
8
7 Out B
–VS 4 5 +In B
B
PAD FUNCTION
1 Out A
2 –In A
3 +In A
4 –VS 5 +In B
6 –In B
7 Out B
8 +VS Substrate Bias: –V S
MECHANICAL INFORMATION
6
+VS
–In B
MILS (0.001") MILLIMETERS
Die Size 97 x 77 ±3 2.46 x 1.96 ±0.13
Die Thickness 20 ±3 0.51 ±0.08
Min. Pad Size 4 x 4 0.10 x 0.10
Transistor Count 53
Backing None
OPA2107
®

Voltage Noise (nV/ Hz)
TYPICAL PERFORMANCE CURVES
T A = +25°C, V S = ±15V unless otherwise noted.
Bias Current (pA)
Power Supply Rejection (dB)
1k
100
10
10nA
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
Voltage Noise
Current Noise
1
0.1
1 10 100 1k
Frequency (Hz)
10k 100k 1M
1nA
100
10
1
®
BIAS AND OFFSET CURRENT
vs TEMPERATURE
OPA2107
Bias Current
Offset Current
0.11
–50 –25 0 +25 +50 +75
Ambient Temperature (°C)
120
100
80
60
40
20
Current Noise
Voltage Noise
POWER SUPPLY AND COMMON-MODE
REJECTION vs FREQUENCY
+PSR
–PSR
100
10
1
10nA
1nA
100
10
1
0.1
+100 +125
0
0
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
CMR
120
100
80
60
40
20
Current Noise (ƒA/ Hz)
Offset Current (pA)
Common-Mode Rejection (dB)
4
Voltage Noise, E O (n/V/ Hz)
Bias Current (pA)
Common-Mode Rejection (dB)
1k
100
10
TOTAL INPUT VOLTAGE NOISE SPECTRAL DENSITY
at 1kHz vs SOURCE RESISTANCE
RS
EO
OPA2107 + Resistor
Resistor Noise Only
1
100 1k 10k 100k 1M 10M 100M
Source Resistance ( Ω)
10
1
0.1
BIAS AND OFFSET CURRENT
vs INPUT COMMON-MODE VOLTAGE
Offset Current
0.01
0.01
–15 –10 –5 0 +5 +10 +15
Common-Mode Voltage (V)
110
100
90
80
COMMON-MODE REJECTION
vs INPUT COMMON-MODE VOLTAGE
70
–15 –10 –5 0 +5 +10 +15
Common-Mode Voltage (V)
10
1
0.1
Offset Current (pA)

TYPICAL PERFORMANCE CURVES (CONT)
T A = +25°C, V S = ±15V unless otherwise noted.
Voltage Gain (dB)
Gain-Bandwidth (MHz)
Settling Time (µs)
120
100
80
60
40
20
OPEN-LOOP FREQUENCY RESPONSE
0
–180
1 10 100 1k 10k 100k 1M 10M
8
6
4
2
Frequency (Hz)
R = 2KΩ
L
C = 100pF
L
A OL
GAIN-BANDWIDTH AND SLEW RATE
vs TEMPERATURE
0
5
–50 –25 0 +25 +50 +75 +100 +125
Ambient Temperature (°C)
5
4
3
2
1
Gain-Bandwidth
SETTLING TIME vs CLOSED-LOOP GAIN
0.01%
0.1%
φ
Slew Rate
V O = 10V Step
R L = 2k Ω
C L = 100pF
0
–1 –10 –100 –1000
Closed-Loop Gain (V/V)
0
–45
–90
–135
25
20
15
10
Slew Rate (V/µs)
Phase Shift (Degrees)
5
Output Voltage (Vp-p)
Gain-Bandwidth (MHz)
Supply Current (mA)
30
20
10
MAXIMUM OUTPUT VOLTAGE SWING
vs FREQUENCY
R L = 2kΩ
0
10k 100k
Frequency (Hz)
1M 10M
6
5
GAIN-BANDWIDTH AND SLEW RATE
vs SUPPLY VOLTAGE
A V = +100
R L = 2kΩ
Gain-Bandwidth
4
14
5 10 15 20
Supply Voltage (±V S )
7
6
5
4
OPA2107
Slew Rate
SUPPLY CURRENT vs TEMPERATURE
Total of Both Op Amps
3
–50 –25 0 +25 +50 +75 +100 +125
Ambient Temperature (°C)
22
20
18
16
Slew Rate (V/µs)
®

TYPICAL PERFORMANCE CURVES (CONT)
T A = +25°C, V S = ±15V unless otherwise noted.
Channel Separation (dB)
THD + Noise (%rms)
150
140
130
120
Output Voltage (5V/div)
®
CHANNEL SEPARATION vs FREQUENCY
R =
L
∞
R L = 2k Ω
110
10 100 1k
Frequency (Hz)
10k 100k
1
0.1
0.01
TOTAL HARMONIC DISTORTION vs FREQUENCY
RS
A = +101V/V
V
A = +11V/V
V
OPA2107 LARGE-SIGNAL RESPONSE
OPA2107
6.5Vrms
2kΩ
0.001
A V = +1V/V
1 10 100 1k 10k 100k
Frequency (Hz)
Time (2µs/div)
6
Voltage Gain (dB)
THD + Noise (%rms)
120
110
100
90
80
Output Voltage (20mV/div)
OPEN-LOOP GAIN vs SUPPLY VOLTAGE
70
5 10 15 20
Supply Voltage (±V S )
1
0.1
0.01
THD + NOISE vs FREQUENCY AND OUTPUT VOLTAGE
RS
2kΩ
Noise Limited
Noise Limited
A = +11V/V
V
Noise Limited
10Vp-p
20Vp-p
0.001
1 10 100 1k 10k 100k
Frequency (Hz)
OPA2107 SMALL-SIGNAL RESPONSE
Time (200ns/div)
2Vp-p

APPLICATIONS INFORMATION
AND CIRCUITS
The OPA2107 is unity-gain stable and has excellent phase
margin. This makes it easy to use in a wide variety of
applications.
Power supply connections should be bypassed with capacitors
positioned close to the amplifier pins. In most cases,
0.1μF ceramic capacitors are adequate. Applications with
larger load currents and fast transient signals may need up to
1μF tantalum bypass capacitors.
INPUT BIAS CURRENT
The OPA2107’s Difet input stages have very low input bias
current—an order of magnitude lower than BIFET op amps.
Circuit board leakage paths can significantly degrade performance.
This is especially evident with the SO-8 surfacemount
package where pin-to-pin dimensions are particularly
small. Residual soldering flux, dirt, and oils, which conduct
leakage current, can be removed by proper cleaning. In most
instances a two-step cleaning process is adequate using a
clean organic solvent rinse followed by de-ionized water.
Each rinse should be followed by a 30-minute bake at 85°C.
A circuit board guard pattern effectively reduces errors due
to circuit board leakage (Figure 1). By encircling critical
high impedance nodes with a low impedance connection at
the same circuit potential, any leakage currents will flow
harmlessly to the low impedance node. Guard traces should
be placed on all levels of a multiple-layer circuit board.
In
In
2
3
A
Non-Inverting
2
3
Inverting
A
1
Out
1 Out
Teflon® E. I. Du Pont de Nemours & Co.
FIGURE 1. Connection of Input Guard.
In
Buffer
A
TO-99 Bottom View
2
2
3
3
4
1 Out
1 7
8
BOARD LAYOUT
FOR INPUT GUARDING
Guard top and bottom of board.
Alternate: use Teflon® standoff
for sensitive input pins.
5
6
7
–In
+In
R G
3
1/2
OPA2107
2
A
1
INA105
RF 5kΩ
2
25kΩ 25kΩ
101Ω
RF 3 25kΩ
6
5
5kΩ
B
7
25kΩ
1
1/2
OPA2107
Differential Voltage Gain = 1 + 2R F /R G = 100
FIGURE 2. FET Input Instrumentation Amplifier.
E1
–In
R G
E2
+In
3
1/2
OPA2107
2
A
1
INA106
RF 10kΩ
2
10kΩ 100kΩ
202Ω
RF 3 10kΩ
6
5
10kΩ
B
7
100kΩ
1
1/2
OPA2107
OPA2107
5
6
I = 5pA Max
B
Gain = 100
CMRR ~ 95dB
R = 10 IN 13 ~
Ω
E O = [10 (1 + 2R F /R G ) (E 2 – E 1 )] = 1000 (E 2 – E 1 )
FIGURE 3. Precision Instrumentation Amplifier.
Output
E O
Output
Using the INA106 for an output difference amplifier extends the input
common-mode range of an instrumentation amplifier to ±10V. A conventional
IA with a unity-gain difference amplifier has an input common-mode
range limited to ±5V for an output swing of ±10V. This is because a unitygain
difference amp needs ±5V at the input for 10V at the output, allowing
only 5V additional for common-mode range.
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.
5
6
®