®
OPA2111
Dual Low Noise Precision
Difet
®
OPERATIONAL AMPLIFIER
FEATURES
q
LOW NOISE: 100% Tested, 8nV/
√
Hz max at
10kHz
q
q
q
q
q
LOW BIAS CURRENT: 4pA max
LOW OFFSET: 500
µ
V max
LOW DRIFT: 2.8
µ
V/
°
C
HIGH OPEN-LOOP GAIN: 114dB min
HIGH COMMON-MODE REJECTION:
96dB min
APPLICATIONS
q
PRECISION INSTRUMENTATION
q
DATA ACQUISITION
q
TEST EQUIPMENT
q
PROFESSIONAL AUDIO EQUIPMENT
q
MEDICAL EQUIPMENT
q
DETECTOR ARRAYS
DESCRIPTION
The OPA2111 is a high precision monolithic
dielectrically isolated FET (
Difet
) operational ampli-
fier. Outstanding performance characteristics allow its
use in the most critical instrumentation applications.
Noise, bias current, voltage offset, drift, open-loop
gain, common-mode rejection, and power supply re-
jection are superior to BIFET
®
amplifiers.
Very low bias current is obtained by dielectric isola-
tion with on-chip guarding.
Laser trimming of thin-film resistors gives very low
offset and drift. Extremely low noise is achieved with
patented circuit design techniques. A cascode design
allows high precision input specifications and reduced
susceptibility to flicker noise.
Standard dual op amp pin configuration allows up-
grading of existing designs to higher performance
levels.
BIFET
®
National Semiconductor Corp.,
Difet
®
Burr-Brown Corp.
*Patented
OPA2111 Simplified Circuit
(Each Amplifier)
+V
CC
8
–In
+In
Noise-Free
Cascode*
Output
–V
CC
4
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
© 1984 Burr-Brown Corporation
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PDS-540E
Printed in U.S.A. October, 1993
SPECIFICATIONS
ELECTRICAL
At V
CC
=
±15VDC
and T
A
= +25°C unless otherwise noted
.
PARAMETER
INPUT NOISE
Voltage, f
O
= 10Hz
f
O
= 100Hz
f
O
= 1kHz
f
O
= 10kHz
f
B
= 10Hz to 10kHz
f
B
= 0.1Hz to 10Hz
Current, f
B
= 0.1Hz to 10Hz
f
O
= 0.1Hz to 20kHz
OFFSET VOLTAGE
(2)
Input Offset Voltage
Average Drift
Match
Supply Rejection
Channel Separation
BIAS CURRENT
(2)
Input Bias Current
Match
OFFSET CURRENT
(2)
Input Offset Current
IMPEDANCE
Differential
Common-Mode
VOLTAGE RANGE
Common-Mode Input Range
Common-Mode Rejection
OPEN-LOOP GAIN, DC
Open-Loop Voltage Gain
Match
FREQUENCY RESPONSE
Unity Gain, Small Signal
Full Power Response
Slew Rate
Settling Time, 0.1%
0.01%
Overload Recovery,
50% Overdrive
(3)
RATED OUTPUT
Voltage Output
Current Output
Output Resistance
Load Capacitance Stability
Short Circuit Current
POWER SUPPLY
Rated Voltage
Voltage Range, Derated
Performance
Current, Quiescent
TEMPERATURE RANGE
Specification
Operating “M” Package
“P” Package
Storage “M” Package
“P” Package
θ
Junction-Ambient
Ambient Temp.
Ambient Temp.
Ambient Temp.
–25
–55
–65
200
+85
+125
+150
–25
–55
–65
200
+85
+125
+150
–55
–55
–65
200
+125
+125
+150
0
–55
–40
–65
–40
200
(4)
+70
+125
+85
+150
+85
°C
°C
°C
°C
°C
°C/W
±10
90
110
CONDITION
100% Tested
100% Tested
100% Tested
(1)
(1)
(1)
(1)
(1)
OPA2111AM
MIN
TYP
40
15
8
6
0.7
1.6
15
0.8
±0.1
±2
±1
110
±3
136
±2
±1
±1.2
10
13
|| 1
10
14
|| 3
±11
110
125
3
2
32
2
6
10
5
±10
±5
±11
±10
100
1000
40
±15
±5
I
O
= 0mADC
5
±18
7
±5
MAX
80
40
15
8
1.2
3.3
24
1.3
±0.75
±6
96
±31
OPA2111BM
MIN
TYP
30
11
7
6
0.6
1.2
12
0.6
±0.05
±0.5
±0.5
110
±3
136
±1.2
±0.5
±0.6
10
13
|| 1
10
14
|| 3
±10
96
114
±11
110
125
2
2
32
2
6
10
5
±10
±5
±11
±10
100
1000
40
±15
±18
7
±5
MAX
60
30
12
8
1
2.5
19
1
±0.5
±2.8
90
±16
OPA2111SM
MIN
TYP
40
15
8
6
0.7
1.6
15
0.8
±0.1
±2
2
110
±3
136
±2
±1
±1.2
10
13
|| 1
10
14
|| 3
±10
90
110
±11
110
125
3
2
32
2
6
10
5
±10
±5
±11
±10
100
1000
40
±15
±18
7
MAX
80
40
15
8
1.2
3.3
24
1
±0.75
±6
OPA2111KM, KP
MIN
TYP
40
15
8
6
0.7
1.6
15
0.8
±0.3
±8
2
110
±3
136
±3
2
±3
10
13
|| 1
10
14
|| 3
±10
82
106
±11
110
125
3
2
32
2
6
10
5
±10
±5
±11
±10
100
1000
40
±15
±5
5
±18
9
±2
±15
MAX
UNITS
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
µVrms
µVp-p
fAp-p
fA/√Hz
mV
µV/°C
µV/°C
dB
µV/V
dB
pA
pA
pA
Ω
|| pF
Ω
|| pF
V
dB
dB
dB
MHz
kHz
V/µs
µs
µs
µs
V
mA
Ω
pF
mA
VDC
VDC
mA
V
CM
= 0VDC
T
A
= T
MIN
to T
MAX
90
100Hz, R
L
= 2kΩ
V
CM
= 0VDC
86
±31
±50
±8
±4
±8
±15
V
CM
= 0VDC
±6
±3
±6
±12
V
IN
=
±10VDC
R
L
≥
2kΩ
20Vp-p, R
L
= 2kΩ
V
O
=
±10V,
R
L
= 2kΩ
Gain = –1, R
L
= 2kΩ
10V Step
Gain = –1
R
L
= 2kΩ
V
O
=
±10VDC
DC, Open-Loop
Gain = +1
16
1
16
1
16
1
10
10
10
10
5
5
NOTES: (1) Sample tested—this parameter is guaranteed. (2) Offset voltage, offset current, and bias current are measured with the units fully warmed up. (3) Overload
recovery is defined as the time required for the output to return from saturation to linear operation following the removal of a 50% input overdrive. (4) Typical
θ
J-A
=
150°C/W for plastic DIP.
®
OPA2111
2
ELECTRICAL (FULL TEMPERATURE RANGE SPECIFICATIONS)
At V
CC
=
±15VDC
and T
A
= T
MIN
to T
MAX
unless otherwise noted.
OPA2111AM
PARAMETER
TEMPERATURE RANGE
Specification Range
INPUT OFFSET VOLTAGE
(1)
Input Offset Voltage
Average Drift
Match
Supply Rejection
BIAS CURRENT
(1)
Input Bias Current
Match
OFFSET CURRENT
(1)
Input Offset Current
VOLTAGE RANGE
Common-Mode Input Range
Common-Mode Rejection
OPEN-LOOP GAIN, DC
Open-Loop Voltage Gain
Match
RATED OUTPUT
Voltage Output
Current Output
Short Circuit Current
POWER SUPPLY
Current, Quiescent
I
O
= 0mADC
5
8
5
8
5
8
5
10
mA
CONDITION
Ambient Temp.
V
CM
= 0VDC
MIN
–25
±0.22
±2
1
100
±10
±125
60
±75
±10
86
106
±11
100
120
5
±11
±10
40
TYP
MAX
+85
±1.2
±6
90
±50
±1nA
OPA2111BM
MIN
–25
TYP
MAX
+85
±0.08 ±0.75
±0.5
±2.8
0.5
100
±10
±32
±75
30
±38
±10
90
110
±11
100
120
3
±11
±10
40
±500
OPA2111SM
MIN
–55
±0.3
±2
2
100
±10
TYP
MAX
+125
±1.5
±6
82
±50
OPA2111KM, KP
MIN
0
±0.9
±8
2
100
±10
±125
TYP
MAX
+70
±5
±15
UNITS
°C
mV
µV/°C
µV/°C
dB
µV/V
pA
pA
pA
V
dB
dB
dB
V
mA
mA
86
86
±80
±500
V
CM
= 0VDC
±2nA ±16.3nA
1nA
±1.3nA ±12nA
±10
86
106
±11
100
120
5
±11
±10
40
±10
80
100
V
CM
= 0VDC
±750
±375
±75
±11
100
120
5
±11
±10
40
±375
V
IN
=
±10VDC
R
L
≥
2kΩ
R
L
= 2kΩ
V
O
=
±10VDC
V
O
= 0VDC
±10.5
±5
10
±10.5
±5
10
±10.5
±5
10
±10.5
±5
10
NOTES: (1) Offset voltage, offset current, and bias current are measured with the units fully warmed up.
CONNECTION DIAGRAMS
Top View
DIP
ABSOLUTE MAXIMUM RATINGS
Supply ...........................................................................................
±18VDC
Internal Power Dissipation (T
J
≤
+175°C) .................................... 500mW
Differential Input Voltage ............................................................ Total V
CC
Input Voltage Range ..........................................................................
±V
CC
Storage Temperature Range: “M” Package .................. –65°C to +150°C
“P” Package .................... –40°C to +85°C
Operating Temperature Range: “M” Package ............... –55°C to +125°C
“P” Package ................. –40°C to +85°C
Lead Temperature (soldering, 10s) ............................................... +300°C
Output Short Circuit to Ground (+25°C) ................................. Continuous
Junction Temperature .................................................................... +175°C
Out A
–In A
+In A
–V
CC
1
2
3
4
A
B
8
7
6
5
+V
CC
Out B
–In B
+In B
PACKAGE INFORMATION
MODEL
Top View
TO-99
OPA2111AM
OPA2111BM
OPA2111KM
OPA2111SM
OPA2111KP
PACKAGE
TO-99
TO-99
TO-99
TO-99
8-Pin Plastic DIP
PACKAGE DRAWING
NUMBER
(1)
001
001
001
001
006
+V
CC
and Case
8
Out A 1
A
–In A 2
B
6 –In B
7 Out B
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
+In A
3
4
–V
CC
5 +In B
ORDERING INFORMATION
TEMPERATURE
MODEL
OPA2111AM
OPA2111BM
OPA2111KM
OPA2111SM
OPA2111KP
PACKAGE
RANGE
OFFSET
VOLTAGE,
max (mV)
±0.75
±0.5
±2
±0.75
±2
®
TO-99
–25°C to +85°C
TO-99
–25°C to +85°C
TO-99
0°C to +70°C
TO-99
–55°C to +125°C
8-Pin Plastic DIP
0°C to +70°C
$
3
OPA2111
DICE INFORMATION
PAD
1
2
3
4
5
6
7
8
NC
FUNCTION
Out A
–In A
+In A
–V
S
+In B
–In B
Out B
+V
S
No Connection
Substrate Bias:
No Connection
MECHANICAL INFORMATION
MILS (0.001")
Die Size
Die Thickness
Min. Pad Size
Backing
Transistor Count
138 x 84
±5
20
±3
4x4
MILLIMETERS
3.51 x 2.13
±0.13
0.51
±0.08
0.10 x 0.10
None
102
OPA2111AD DIE TOPOGRAPHY
TYPICAL PERFORMANCE CURVES
T
A
= +25°C, and V
CC
=
±15VDC
unless otherwise noted.
INPUT CURRENT NOISE SPECTRAL DENSITY
100
VOLTAGE AND CURRENT NOISE SPECTRAL
DENSITY vs TEMPERATURE
12
f
O
= 1kHz
100
Current Noise (fA/ Hz)
Voltage Noise (nV/ Hz)
10
10
10
8
1
1
BM
6
0.1
0.1
1
10
100
1k
Frequency (Hz)
10k
100k
1M
4
–75
–50
–25
0
25
50
75
100
0.01
125
Temperature (°C)
®
OPA2111
4
Current Noise (fA/ Hz)
TYPICAL PERFORMANCE CURVES
T
A
= +25°C, and V
CC
=
±15VDC
unless otherwise noted.
TOTAL
(1)
INPUT VOLTAGE NOISE SPECTRAL
DENSITY vs SOURCE RESISTANCE
1k
R
S
= 10MΩ
R
S
= 1MΩ
100
R
S
= 100kΩ
(CONT)
INPUT OFFSET VOLTAGE WARM-UP DRIFT
40
Offset Voltage Change (µV)
Voltage Noise (nV/ Hz)
20
0
10
BM
NOTE: (1) Includes contribution
from source resistance.
R
S
= 100Ω
–20
1
0.1
1
10
100
Frequency (Hz)
1k
10k
100k
–40
0
1
2
3
4
5
6
Time From Power Turn-On (Minutes)
INPUT VOLTAGE NOISE SPECTRAL DENSITY
1k
BIAS AND OFFSET CURRENT
vs TEMPERATURE
1k
1k
Voltage Noise (nV/ Hz)
100
100
Bias Current (pA)
100
Offset Current (pA)
®
10
10
AM, SM
BM
10
1
1
0.1
1
1
10
100
1k
Frequency (Hz)
10k
100k
1M
0.1
0.01
–50
–25
0
25
50
75
100
125
Ambient Temperature (°C)
0.01
TOTAL
(1)
INPUT VOLTAGE NOISE (PEAK-TO-PEAK)
vs SOURCE RESISTANCE
1k
140
POWER SUPPLY REJECTION
vs FREQUENCY
Voltage Noise (µVp-p)
100
NOTE: (1) Includes contribution
from source resistance.
Power Supply Rejection (dB)
10
120
100
80
60
40
20
0
10
BM
f
B
= 0.1Hz to 10Hz
1
10
4
10
5
10
6
10
7
10
8
10
9
10
1
10
100
1k
10k
100k
1M
10M
Source Resistance (Ω)
Frequency (Hz)
5
OPA2111
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