Page 1
LH0042
Low Cost FET Op Amp
General Description
The LH0042 is a FET input operational amplifier with very
high input impedance and low input currents with no compromise in noise, common mode rejection ratio, open loop
gain, or slew rate. The LH0042 is internally compensated
and is free of latch-up.
The LH0042 is specified for operation over the
a
125§C military temperature range. The LH0042C is specified for operation over the
range.
b
25§Ctoa85§C temperature
Connection Diagram
b
55§Cto
Metal Can Package
February 1995
The LH0042 op amp is intended to fulfill a wide variety of
applications for process control, medical instrumentation,
and other systems requiring very low input currents. The
LH0042 provides low cost high performance for such applications as electrometer and photocell amplification, picoammeters, and high input impedance buffers.
Features
Y
High open loop gainÐ100 dB typ
Y
Internal compensation
Y
Pin compatible with standard IC op amps
(TO-99 package)
LH0042 Low Cost FET Op Amp
Top View
Order Number LH0042H-MIL, LH0042H or LH0042CH
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/K/5557
See NS Package Number H08D
TL/K/5557– 3
Page 2
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
Power Dissipation (see Graph) 500 mW
Input Voltage (Note 1)
Differential Input Voltage (Note 2)
Voltage Between Offset Null and V
b
g
22V
g
15V
g
30V
g
0.5V
Short Circuit Duration Continuous
Operating Temperature Range
LH0022, LH0042, LH0052
LH0022C, LH0042C, LH0052C
Storage Temperature Range
b
55§Ctoa125§C
b
25§Ctoa85§C
b
65§Ctoa150§C
Lead Temperature (Soldering, 10 sec.) 300
C
§
DC Electrical Characteristics for LH0022/LH0022C (Note 3) T
A
e
TJ(Max)
Limits
Parameter Conditions LH0022 LH0022C Units
Min Typ Max Min Typ Max
Input Offset Voltage R
Temperature Coefficient of R
Input Offset Voltage
S
V
S
R
S
S
s
100 kX,T
e
g
s
100 kX,V
s
100 kX
15V
e
25§C
A
e
g
15V 5.0 7.0 mV
S
2.0 4.0 3.5 6.0 mV
10 15 mV/
C
§
Offset Voltage Drift with Time 3 4 mV/week
Input Offset Current T
e
25§C (Note 4) 0.2 2.0 1.0 5.0 pA
A
2.0 0.5 nA
Temperature Coefficient of
Input Offset Current
Doubles Every 10
C Doubles Every 10§C
§
Offset Current Drift with Time 0.1 0.1 pA/week
Input Bias Current T
e
25§C (Note 4) 5 10 10 25 pA
A
10 2.5 nA
Temperature Coefficient of
Input Bias Current
Differential Input Resistance 10
Common Mode Input Resistance 10
Doubles Every 10
12
12
C Doubles Every 10§C
§
12
10
12
10
X
X
Input Capacitance 4.0 4.0 pF
Input Voltage Range V
Common Mode Rejection Ratio R
Supply Voltage Rejection Ratio R
Large Signal Voltage Gain R
Output Voltage Swing R
Output Current Swing V
g
S
s
10 kX,V
S
s
10 kX,g5VsV
S
e
2kX,V
L
e
T
25§C, V
A
e
R
2kX,V
L
e
g
V
S
e
1kX,T
L
e
g
V
S
e
R
2kX,V
L
e
OUT
15V
15V
15V
g
IN
OUT
S
OUT
A
S
10V, T
e
g
10V 74 90 70 90 dB
s
S
e
g
10V
e
g
15V
e
g
10V
e
25§C
e
g
15V
e
25§C
A
g12g
13.5
g
15V 74 90 70 90 dB
g12g
13.5 V
75 100 75 100 V/mV
30 30 V/mV
g10g
g
10
g
10g15
12.5
g
10g12 V
g
10 V
g
10g15 mA
e
Output Resistance 75 75 X
Output Short Circuit Current 25 25 mA
e
Supply Current V
Power Consumption V
g
15V 2.0 2.5 2.4 2.8 mA
S
e
g
15V 75 85 mW
S
2
Page 3
DC Electrical Characteristics for LH0042/LH0042C (Note 3)
Limits
Parameter Conditions LH0042 LH0042C Units
Min Typ Max Min Typ Max
Input Offset Voltage R
Temperature Coefficient of R
Input Offset Voltage
Offset Voltage Drift with Time 7.0 10 mV/week
Input Offset Current T
Input Bias Current T
Temperature Coefficient of
Input Bias Current
Differential Input Resistance 10
Common Mode Input Resistance 10
Input Capacitance 4.0 4.0 pF
Input Voltage Range
Common Mode Rejection Ratio R
Supply Voltage Rejection Ratio R
Large Signal Voltage Gain R
Output Voltage Swing R
Output Current Swing V
Output Resistance 75 75 X
Output Short Circuit Current 20 20 mA
Supply Current V
Power Consumption V
s
100 kX 5.0 20 6.0 20 mV
S
s
100 kX
S
e
25§C (Note 4) 1.0 5.0 2.0 10 pA
A
e
25§C (Note 4) 10 25 15 50 pA
A
Doubles Every 10
g
s
10 kX,V
S
s
10 kX,g5VsV
S
s
2kX,V
S
e
T
25§C
A
s
R
2kX,V
S
e
1kX,T
L
e
R
2kX
L
e
OUT
e
g
S
e
g
S
e
g
10V 70 86 70 80 dB
IN
OUT
OUT
A
g
10V
s
g
15V 70 86 70 86 dB
S
e
g
10V,
e
g
10V 30 25 V/mV
e
25§C
50 100 25 100 V/mV
g
g
g
15V 2.5 3.5 2.8 4.0 mA
15V 105 120 mW
10 15 mV/
C Doubles Every 10§C
§
12
12
12g13.5
10g12.5
10
g
10
15
10
10
g
12g13.5 V
g
g
10
g
10 V
g
g
10
12
12
12 V
15 mA
C
§
X
X
3
Page 4
DC Electrical Characteristics for LH0052/LH0052C (Note 3) (Continued)
Limits
Parameter Conditions LH0052 LH0052C Units
Min Typ Max Min Typ Max
Input Bias Current T
Temperature Coefficient of
Input Bias Current
Differential Input Resistance 10
Common Mode Input Resistance 10
Input Capacitance 4.0 4.0 pF
Input Voltage Range V
Common Mode Rejection Ratio R
Supply Voltage Rejection Ratio R
Large Signal Voltage Gain R
Output Voltage Swing R
Output Current Swing V
Output Resistance 75 75 X
Output Short Circuit Current 25 25 mA
Supply Current V
Power Consumption V
e
25§C (Note 4) 0.5 2.5 1.0 5.0 pA
A
2.5 0.5 nA
Doubles Every 10
e
g
15V
S
s
10 kX,V
S
s
10 kX,g5VsV
S
e
2kX,V
L
e
g
V
S
e
R
2kX,V
L
e
g
V
S
e
1kX,T
L
e
g
V
S
e
R
2kX,V
L
e
OUT
e
g
S
e
g
S
e
g
10V 74 90 70 90 dB
IN
s
g
S
e
g
15V, T
15V
15V
g
10V, T
OUT
OUT
A
S
10V
e
25§C
A
e
g
10V
e
25§C
e
g
15V
e
25§C
A
15V 3.0 3.5 3.0 3.8 mA
15V 105 114 mW
g
g
12
15V 74 90 70 90 dB
75 100 75 100 V/mV
30 30 V/mV
g
g
10
g
10
g
10
C Doubles Every 10§C
§
12
12
g
g
g
g
g
13.5
12.5
15
12
10
12
10
g
12
13.5 V
g
10
12 V
10 V
g
10
15 mA
X
X
AC Electrical Characteristics for all amplifiers (T
e
A
25§C, V
e
g
15V)
S
Limits
Parameter Conditions LH0022/42/52 LH0022C/42C/52C Units
Min Typ Max Min Typ Max
Slew Rate Voltage Follower 1.5 3.0 1.0 3.0 V/ms
Large Signal Bandwidth Voltage Follower 40 40 kHz
Small Signal Bandwidth 1.0 1.0 MHz
Rise Time 0.3 1.5 0.3 1.5 ms
Overshoot 10 30 15 40 %
Settling Time (0.1%) DV
e
10V 4.5 4.5 ms
IN
Overload Recovery 4.0 4.0 ms
4
Page 5
AC Electrical Characteristics for all amplifiers (T
e
A
25§C, V
e
g
15V) (Continued)
S
Limits
Parameter Conditions LH0042 LH0042C Units
Min Typ Max Min Typ Max
Input Noise Voltage R
e
S
e
R
S
e
R
S
e
R
S
BWe10 Hz to 10kHz, R
Note 1: For supply voltages less thang15V, the absolute maximum input voltage is equal to the supply voltage.
Note 2: Rating applies for minimum source resistance of 10 kX, for source resistances less than 10 kX, maximum differential input voltage is
Note 3: Unless otherwise specified, these specifications apply for
for the LH0042C. Typical values are given for T
Note 4: Input currents are a strong function of temperature. Due to high speed testing they are specified at a junction temperature T
cause an increase in current in manual tests. 25
Note 5: See RETS0042X for the LH0042H military specifications.
10 kX,f
10 kX,f
10 kX,f
10 kX,f
e
10 Hz 150 150 nV/SHz
o
e
100 Hz 55 55 nV/SHz
o
e
1 kHz 35 35 nV/SHz
o
e
10 kHz 30 30 nV/SHz
o
e
10 kX 12 12 mVrms
S
g
s
5VsV
g
20V andb55§CsT
S
e
25§C.
A
C spec is guaranteed by testing at 125§C.
§
g
s
a
125§C for the LH0042 andb25§CsT
A
5V.
e
25§C. Self heating will
j
Auxiliary Circuits (Shown for TO-99 pin out)
s
a
85§C
A
Offset Null
Protecting Inputs fromg150V Transients
TL/K/5557– 5
Note: All diodes are ultra low leakage.
Boosting Output Drive tog100 mA
TL/K/5557– 6
TL/K/5557– 7
5
Page 6
Schematic Diagram
TL/K/5557– 1
6
Page 7
Typical Applications
Precision Voltage Comparator
TL/K/5557– 9
Subtractor for Automatic Test Gear
Sensitive Low Cost ‘‘VTVM’’
7
e
e
OUT
10c(e
b
e
)
IN1
IN2
TL/K/5557– 11
TL/K/5777– 12
Page 8
Typical Applications (Continued)
Ultra Low Level Current Source
TL/K/5777– 13
Sample and Hold
Re-Zeroing Amplifier
C1Ð0.01 mF polystyrene.
8
*Polystyrene dielectric.
TL/K/5557– 16
TL/K/5557– 17
Page 9
Typical Performance Characteristics
Maximum Power Dissipation vs Temperature
Input Offset Current
Input Offset Voltage
vs Temperature
Total Input Noise Voltage*
vs Frequency
Offset Error
(without V
OS
Null)
Common Mode Input Voltage
vs Supply Voltage
Input Bias Current vs
Temperature
Total Input Noise Voltage*
vs Source Resistance
Stabilization Time of
Input Offset Voltage from
Power Turn-On
*Noise voltage includes contribution from source resistance.
Change in Input Offset
Voltage Due to Thermal
Shock vs Time
TL/K/5557– 18
9
Page 10
Typical Performance Characteristics (Continued)
Supply Voltage vs
Supply Current
Output Voltage Swing
vs Load Resistance
Voltage Follower Large
Signal Response
Voltage Gain Supply Voltage
Output Swing vs
Output Voltage Swing vs
Current Limiting Frequency
Frequency Characteristics vs
Transient Response Ambient Temperature
Frequency Characteristics vs
Supply Voltage
Output Resistance vs
Frequency
10
Open Loop Transfer
Characteristics vs Frequency
TL/K/5557– 19
Page 11
11
Page 12
Physical Dimensions inches (millimeters)
LH0042 Low Cost FET Op Amp
Order Number H0042H-MIL, LH0042H or LH0042CH
Metal Can Package (H)
NS Package Number H08D
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or 2. A critical component is any component of a life
systems which, (a) are intended for surgical implant support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance support device or system, or to affect its safety or
with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.
National Semiconductor National Semiconductor National Semiconductor National Semiconductor
Corporation Europe Hong Kong Ltd. Japan Ltd.
1111 West Bardin Road Fax: (
Arlington, TX 76017 Email: [email protected] Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408
Tel: 1(800) 272-9959 Deutsch Tel: (
Fax: 1(800) 737-7018 English Tel: (
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
Fran3ais Tel: (
Italiano Tel: (
a
49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309
a
49) 0-180-530 85 85 Tsimshatsui, Kowloon
a
49) 0-180-532 78 32 Hong Kong
a
49) 0-180-532 93 58 Tel: (852) 2737-1600
a
49) 0-180-534 16 80 Fax: (852) 2736-9960
Page 13
This datasheet has been downloaded from:
www.DatasheetCatalog.com
Datasheets for electronic components.
Loading...