RH37C
Precision Operational Amplifier
DESCRIPTIO
ABSOLUTE
AXI U
RATI GS
The RH37C combines very low noise with excellent preci-
sion and high speed specifications. The low 1/f noise
corner frequency of 2.7Hz combined with 3.5nV√Hz 10Hz
noise and low offset voltage make the RH37C an excellent
choice for low frequency military instrumentation applica-
tions. The wafer lots are processed to LTC’s in-house
Class S flow to yield circuits usable in stringent military
applications.
For complete electrical specifications and performance
curves see the OP-27/OP-37 data sheet.
Supply Voltage .....................................................
±22V
Internal Power Dissipation ................................ 500mW
Input Voltage ........................... Equal to Supply Voltage
Output Short-Circuit Duration ......................... Indefinite
Differential Input Current (Note 8) .....................
±25mA
Operating Temperature Range ............. – 55°C to 125°C
Junction Temperature Range ............... – 55°C to 150°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
, LTC and LT are registered trademarks of Linear Technology Corporation.
BUR -I CIRCUIT
10k
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
OS
TRIM
8
V
OS
TRIM 1
+
TOP VIEW
7
V
+
6
5
OUT
V
OS
TRIM 1
–IN 2
+IN 3
V
–
–
8
7
6
5
J8 PACKAGE
8-LEAD CERDIP
V
OS
TRIM
V
+
OUT
NC
200Ω
6
+IN
3
4
V
–
(CASE)
NC
4
10k
–20V
RH37C BI
+IN 4
V
–
5
W PACKAGE
10-LEAD CERPAC
TABLE 1: ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
∆V
OS
∆Temp
∆V
OS
∆Time
I
OS
I
B
Input Offset Voltage
Average Offset Drift
Long-Term Input Offset
Voltage Stability
Input Offset Current
Input Bias Current
CONDITIONS
NOTES
1
4, 7
2, 4
(Preirradiation) (Note 9)
SUB-
GROUP
4
– 55°C
≤
T
A
≤
125°C
MIN TYP MAX
300
1.8
2
75
±80
1
1
135
±150
2, 3
2, 3
SUB-
GROUP
2, 3
UNITS
µV
µV/°C
µV/Month
nA
nA
T
A
= 25
°
C
MIN TYP MAX
100
+
–IN 3
–
+
3
4
H PACKAGE
8-LEAD TO-5 METAL CAN
TOP VIEW
NC 1
V
OS
TRIM 2
10 NC
9
8
7
6
V
OS
TRIM
V
+
OUT
NC
+
–
2
7
–IN 2
–
20V
U
U
W
W W
U
W
U
U U
1
RH37C
TABLE 1: ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
e
n
Input Noise Voltage
Input Noise Voltage Density
CONDITIONS
0.1Hz to 10Hz
f
O
= 10Hz
f
O
= 30Hz
f
O
= 1000Hz
f
O
= 1000Hz
NOTES
4, 5
3
4
4
4, 6
2
4
V
CM
=
±11V
V
CM
=
±10V
V
S
=
±4V
to
±18V
V
S
=
±4.5V
to
±18V
R
L
≥
2k, V
O
=
±10V
R
L
≥
600Ω, V
O
=
±1V
V
S
=
±4V
R
L
= 2k
R
L
= 600Ω
R
L
= 2k, A
VCL
≥
5
f
O
= 10kHz (A
VCL
≥
5)
f
O
= 1MHz (A
VCL
≥
5)
4
4
±11
100
94
700
200
±11.5
±10.0
11
45
40
470
170
1
1
94
1
86
4
300
2, 3
5, 6
2, 3
±10.2
(Preirradiation) (Note 9)
SUB-
GROUP
– 55°C
≤
T
A
≤
125°C
MIN TYP MAX
SUB-
GROUP
UNITS
µV
P-P
nV/√Hz
nV/√Hz
nV/√Hz
pV/√Hz
GΩ
V
dB
dB
dB
dB
V/mV
V/mV
V
V
V/µs
MHz
MHz
Ω
mW
T
A
= 25
°
C
MIN TYP MAX
0.25
8.0
5.6
4.5
0.6
i
n
Input Noise Current Density
Input Resistance
Common Mode
Input Voltage Range
CMRR
PSRR
A
VOL
Common Mode
Rejection Ratio
Power Supply
Rejection Ratio
Large-Signal Voltage Gain
V
OUT
SR
GBW
Z
O
P
D
Maximum Output
Voltage Swing
Slew Rate
Gain-Bandwidth Product
4
4
7
±10.5
5, 6
Open-Loop Output Resistance V
O
= 0, I
O
= 0
Power Dissipation
TABLE 1A: ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
I
OS
I
B
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Resistance
Common Mode
Input Voltage Range
CMRR
PSRR
A
VOL
V
OUT
SR
Z
O
P
D
Common Mode
Rejection Ratio
Power Supply
Rejection Ratio
Large-Signal Voltage Gain
Maximum Output
Voltage Swing
Slew Rate
Power Dissipation
V
CM
=
±11V
V
S
=
±4V
to
±18V
R
L
≥
2k, V
O
=
±10V
R
L
≥
10k
R
L
≥
600Ω
R
L
≥
2k
4
CONDITIONS
NOTES
1
100
75
±80
2 (Typ)
±11
100
94
700
±11.5
±10.0
1.7
70 (Typ)
170
(Postirradiation) (Note 10)
10KRAD(Si) 20KRAD(Si) 50KRAD(Si) 100KRAD(Si) 200KRAD(Si)
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX UNITS
130
75
±80
2 (Typ)
±11
100
94
700
±11.5
±10.0
1.7
70 (Typ)
170
180
90
±125
2 (Typ)
±11
97
92
700
±11.5
±10.0
1.7
70 (Typ)
170
280
120
±200
2 (Typ)
±11
94
90
700
±11.5
±10.0
1.5
70 (Typ)
170
400
180
±400
2 (Typ)
±11
90
86
400
±11.5
±10.0
1
70 (Typ)
170
µV
nA
nA
GΩ
V
dB
dB
V/mV
V
V
V/µs
Ω
mW
Open-Loop Output Resistance V
O
= 0, I
O
= 0
2
RH37C
TABLE 1A: ELECTRICAL CHARACTERISTICS
Note 1:
Input offset voltage measurements are performed by automatic
test equipment approximately 0.5 seconds after application of power.
Note 2:
Long-term input offset voltage stability refers to the average trend
line of offset voltage vs time over the first 30 days of operation. Excluding
the initial hour of operation, changes in V
OS
during the first 30 days are
typically 2.5µV. Refer to the typical performance curves.
Note 3:
Sample tested to an LTPD of 15 on every lot. Contact factory for
100% testing of 10Hz voltage density noise.
Note 4:
Parameter is guaranteed by design, characterization, or correlation
to other tested parameters.
Note 5:
See test circuit and frequency response curve for 0.1Hz to 10Hz
tester on OP-27/OP-37 data sheet.
Note 6:
See test circuit for current noise measurement on OP-27/OP-37
data sheet.
Note 7:
The average input offset drift performance is within the specifica-
tions unnulled or when nulled with a pot having a range 8kΩ to 20kΩ.
Note 8:
The RH37C’s inputs are protected by back-to-back diodes. Current
limiting resistors are not used in order to achieve low noise. If differential
input voltage exceeds
±0.7V,
the input current should be limited to 25mA.
Note 9:
V
S
=
±15V,
V
CM
= 0V unless otherwise noted.
Note 10:
T
A
= 25°C, V
S
=
±15V,
V
CM
= 0V, unless otherwise noted.
TOTAL DOSE BIAS CIRCUIT
10k
15V
8V
TYPICAL PERFOR A CE CHARACTERISTICS
Positive Slew Rate
25
V
S
=
±15V
R
L
= 2k
A
VCL
≥
5
25
NEGATIVE SLEW RATE (V/µs)
POSITIVE SLEW RATE (V/µs)
20
15
10
5
0
1
100
10
TOTAL DOSE KRAD (Si)
1000
RH37C G01
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
+
–15V
10k
–
U W
Negative Slew Rate
V
S
=
±15V
R
L
= 2k
A
VCL
≥
5
20
15
10
0
1
10
100
TOTAL DOSE KRAD (Si)
1000
RH37C G02
3
RH37C
TYPICAL PERFOR A CE CHARACTERISTICS
Input Offset Voltage
150
100
V
S
=
±15V
V
CM
= 0V
170
160
INPUT OFFSET VOLTAGE (µV)
INPUT BIAS CURRENT (nA)
OPEN-LOOP GAIN (dB)
50
0
–50
–100
–150
–200
1
100
TOTAL DOSE KRAD (Si)
10
1000
RH37C G03
Common Mode Rejection Ratio
170
COMMON MODE REJECTION RATIO (dB)
160
150
140
130
120
110
100
1
POWER SUPPLY REJECTION RATIO (dB)
V
S
=
±15V
V
CM
=
±11V
INPUT OFFSET CURRENT (nA)
100
TOTAL DOSE KRAD (Si)
10
TABLE 2: ELECTRICAL TEST REQUIRE E TS
MIL-STD-883 TEST REQUIREMENTS
Final Electrical Test Requirements (Method 5004)
Group A Test Requirements (Method 5005)
Group B and D for Class S, and
Group C and D for Class B
End Point Electrical Parameters (Method 5005)
* PDA applies to subgroup 1. See PDA Test Notes.
SUBGROUP
1*,2,3,4,5,6,7
1,2,3,4,5,6,7
1
PDA Test Notes
The PDA is specified as 5% based on failures from group A, subgroup 1,
tests after cooldown as the final electrical test in accordance with method
5004 of MIL-STD-883 Class B. The verified failures of group A, subgroup
1, after burn-in divided by the total number of devices submitted for burn-
in in that lot shall be used to determine the percent for the lot.
Linear Technology Corporation reserves the right to test to tighter limits
than those given.
4
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
q
(408) 432-1900
FAX: (408) 434-0507
q
TELEX: 499-3977
q
www.linear-tech.com
U W
U W
1000
RH37C G06
Open-Loop Gain
V
S
=
±15V
R
L
= 2k
V
OUT
=
±10V
350
300
250
200
150
100
50
0
1
100
TOTAL DOSE KRAD (Si)
10
1000
RH37C G04
Input Bias Current
V
S
=
±15V
V
CM
= 0V
150
140
130
120
110
100
1
100
TOTAL DOSE KRAD (Si)
10
1000
RH37C G05
Input Offset Current
75
V
S
=
±15V
V
CM
= 0V
140
130
120
110
100
90
80
70
Power Supply Rejection Ratio
V
S
=
±4V
TO
±18V
50
25
0
–25
–50
1
100
10
TOTAL DOSE KRAD (Si)
1000
RH37C G07
1
10
100
TOTAL DOSE KRAD (Si)
1000
RH37C G08
I.D. No. 66-10-0172 Rev. B 0398
rh37cb LT/HP 0398 100 REV B • PRINTED IN USA
©
LINEAR TECHNOLOGY CORPORATION 1993
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