_______________General Description
The MXL1001 offers significant specification improvement
over earlier precision operational amplifiers and is pin-
compatible with the industry-standard LT1001. Particular
attention has been paid to the optimization of key parame-
ters such as input offset voltage, common-mode rejection,
and power-supply rejection. In addition, the high-perfor-
mance MXL1001C commercial temperature device pro-
vides considerable cost savings when compared to
equivalent grades of competing precision amplifiers.
The input offset voltage of all units is less than 60V,
allowing the premium military device, the MXL1001AM, to
be specified at 15V max. Power dissipation is close to
half that of the industry-standard OP-07 precision op
amp, without sacrificing noise or speed performance. A
useful by-product of lower dissipation is decreased
warm-up drift.
________________________Applications
Thermocouple Amplifiers
Low-Level Signal Processing
Strain Gauge Amplifiers
High-Accuracy Data Acquisition
____________________________Features
o
Guaranteed Low Offset Voltage
MXL1001AM: 15V max
MXL1001C: 60V max
o
Guaranteed Low Drift
MXL1001AM: 0.6V/C max
MXL1001C: 1.0V/C max
o
Guaranteed Low Bias Current
MXL1001AM: 2nA max
MXL1001C: 4nA max
o
Guaranteed CMRR
MXL1001AM: 114dB min
MXL1001C: 110dB min
o
Guaranteed PSRR
MXL1001AM: 110dB min
MXL1001C: 106dB min
o
Low Power Dissipation
MXL1001AM: 75mW max
MXL1001C: 80mW max
o
Low Noise: 0.3V
p-p
______________Ordering Information
MXL1001
Precision Operational Amplifier
________________________________________________________________
Maxim Integrated Products
1
SENSING
JUNCTION
REFERENCE
JUNCTION
R1
R2
R3
R4
HIGH-STABILITY
THERMOCOUPLER AMPLIFIER
R1
R3
R2
R4
=
MXL1001
__________________Pin Configuration
1
2
3
4
8
7
6
5
V
OS
TRIM
V+
V
OUT
N.C.
V-
+IN
-IN
V
OS
TRIM
MXL1001
DIP/SO
TO-99
TOP VIEW
V
OUT
-IN
N.C.
V+
+IN
V
OS
TRIM
V
OS
TRIM
V-
6
2
8
4
5
1
7
3
MXL1001
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
19-0286; Rev 1; 8/94
PART
MXL1001ACN8
MXL1001CN8
MXL1001ACS8
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 SO
MXL1001CS8
MXL1001ACJ8
0C to +70C
0C to +70C
8 SO
8 CERDIP
MXL1001CJ8
MXL1001ACH
0C to +70C
0C to +70C
8 CERDIP
8 TO-99
MXL1001CH
MXL1001AMJ8
-55C to +125C
0C to +70C
8 TO-99
8 CERDIP
MXL1001MJ8
-55C to +125C
8 CERDIP
MXL1001AMH
MXL1001MH
-55C to +125C
-55C to +125C
8 TO-99
8 TO-99
MXL1001
Precision Operational Amplifier
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
S
= 15V, T
A
= +25C, unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 2:
MXL1001A grade V
OS
is measured one minute after application of power. For all other grades V
OS
is measured
approximately 0.5 seconds after application of power.
Note 3:
Long-Term Input Offset Voltage Stability refers to the average trend line of V
OS
vs. Time over extended periods after the first
30 days of operation. Excluding the initial hour of operation, changes in V
OS
during the first 30 operating days are typically
2.5V. Parameter is sample tested.
Note 4:
Sample tested.
Note 5:
Guaranteed by design.
Total Supply Voltage (V+ to V-) ...........................................22V
Continuous Power Dissipation .........................................500mW
TO-99(H)--derate at 7.1mW/C above +80C
CERDIP(J)--derate at 6.7mW/C above +75C
Plastic DIP(P)--derate at 5.6mW/C above +36C
Small Outline(S)--derate at 5mW/C above +55C
Differential Input Voltage .....................................................30V
Input Voltage (Note 1)..........................................................22V
Duration of Output Short Circuit ....................................Indefinite
Operating Temperature Ranges:
MXL1001C_/AC_.................................................0C to +70C
MXL1001M_/AM_...........................................-55C to +125C
Junction Temperature (T
J
) .................................-65C to +160C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
(Note 3)
V
S
= 3V, no load
V
S
= 15V, no load
(Note 2)
A
VCL
= +1V (Note 4)
R
L
2k
(Note 4)
R
L
1k
R
L
2k
(Note 5)
R
L
1k
, V
O
= 10V
R
L
2k
, V
O
= 12V
f
O
= 1000Hz (Note 4)
f
O
= 100Hz (Note 4)
0.1Hz to 10Hz (Note 4)
V
S
= 3V to 18V
f
O
= 10Hz (Note 4)
V
CM
= 13V
CONDITIONS
mW
4
6
P
D
Power Consumption
46
75
MHz
0.4
0.8
BW
Closed-Loop Bandwidth
V/s
0.1
0.25
SR
Slew Rate
V
12.0 13.5
V
O
Output Voltage Swing
13.0 14.0
V/mV
300
500
A
VO
Large-Signal Voltage Gain
450
800
dB
110
123
PSRR
Power-Supply Rejection Ratio
dB
114
126
CMRR
Common-Mode Rejection Ratio
V/
Month
0.2
1.0
V
OS
/Time
Long-Term Input Offset
Voltage Stability
V
10
25
V
OS
7
15
Input Offset Voltage
V
13
14
IVR
Input Voltage Range
M
30
100
R
IN
Input Resistance
(Differential Mode)
nV/
Hz
9.6
11.0
e
N
Input Noise Voltage Density
10.0
13.0
nA
0.3
2.0
I
OS
Input Offset Current
nA
0.5
2.0
I
B
Input Bias Current
V
p-p
0.3
0.6
e
N p-p
Input Noise Voltage
10.3
18.0
UNITS
MXL1001AM
MXL1001AC
Note 1:
For supply voltages less than 22V, the absolute maximum input voltage is equal to the supply voltage.
4
8
48
80
0.4
0.8
0.1
0.25
12.0 13.5
13.0 14.0
250
500
400
800
106
123
110
126
0.3
1.5
18
60
13
14
15
80
9.8
11.0
10.0
13.0
0.4
3.8
0.7
4.0
0.3
0.6
10.5
18.0
MXL1001M
MXL1001C
MIN
TYP
MAX
SYMBOL
PARAMETER
MIN
TYP
MAX
MXL1001AC
MXL1001AM
18
60
MXL1001
Precision Operational Amplifier
_______________________________________________________________________________________
3
R
L
2k
, V
O
= 10V
V
S
= 3V to 18V
(Note 6)
V
CM
= 13V
CONDITIONS
V/mV
300
700
A
VO
Large-Signal Voltage Gain
dB
104
117
PSRR
Power-Supply Rejection Ratio
dB
110
122
CMRR
Common-Mode Rejection Ratio
V
13
14
IVR
Input Voltage Range
nA
1.0
4.0
I
B
Input Bias Current
V
30
60
V
OS
Input Offset Voltage
V/C
0.2
0.6
TCV
OS
Average Temperature Coefficient
of Input Offset Voltage
nA
0.8
4.0
I
OS
Input Offset Current
UNITS
MXL1001AM
200
700
100
117
106
120
13
14
1.5
8.0
45
160
0.3
1.0
1.2
7.6
MXL1001M
MIN
TYP
MAX
SYMBOL
PARAMETER
MIN
TYP
MAX
ELECTRICAL CHARACTERISTICS
(V
S
= 15V, -55C
T
A
+125C, unless otherwise noted.)
Output Voltage Swing
V
O
R
L
2k
12.5 13.5
12.5 13.5
V
Power Dissipation
P
D
No load
55
90
60
100
mW
ELECTRICAL CHARACTERISTICS
(V
S
= 15V, 0C
T
A
+70C, unless otherwise noted.)
Output Voltage Swing
V
O
R
L
2k
12.5 13.8
12.5 13.8
V
Power Dissipation
R
L
2k
, V
O
= 10V
P
D
V
S
= 3V to 18V
No load
50
85
55
90
mW
(Note 6)
V
CM
= 13V
CONDITIONS
V/mV
350
750
A
VO
Large-Signal Voltage Gain
dB
106
120
PSRR
Power-Supply Rejection Ratio
dB
110
124
CMRR
Common-Mode Rejection Ratio
V
13
14
IVR
Input Voltage Range
nA
0.7
3.5
I
B
Input Bias Current
V
20
60
V
OS
Input Offset Voltage
V/C
0.2
0.6
TCV
OS
Average Temperature Coefficient
of Input Offset Voltage
nA
0.5
3.5
I
OS
Input Offset Current
UNITS
MXL1001AC
250
750
103
120
106
123
13
14
1.0
5.5
30
110
0.3
1.0
0.6
5.3
MXL1001C
MIN
TYP
MAX
SYMBOL
PARAMETER
MIN
TYP
MAX
Note 6:
MXL1001A grade offset voltage is measured one minute after application of power. For all other grades V
OS
is measured
0.5 seconds after power on.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
4
___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
1994 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MXL1001
Precision Operational Amplifier
OUTPUT
INPUT
20k
V-
V+
MXL1001
1
2
3
4
6
7
8
Figure 1. Optional Offset Nulling Circuit
__________Applications Information
The MXL1001 series devices are pin-compatible with the
OP-07, OP-05, 725, 108A or 101A amplifiers. The
MXL1001 amplifiers can be used to upgrade older
designs using these devices, with or without removal of
external frequency compensation or nulling components.
The MXL1001 can also be used in 741, LF156 or OP-15
applications provided the nulling circuitry is removed.
The MXL1001 is specified over a wide supply voltage
range from 3V to 18V. Operation with lower supplies
is possible down to 1.2V (two NiCd batteries), howev-
er, at this level the device is stable only in closed-loop
gains of +2 and above (or inverting gain of one or high-
er). Unless proper care is exercised, thermocouple
effects caused by temperature gradients across dissimi-
lar metals at the input terminal connections, can exceed
the inherent offset-voltage drift of the amplifier. Air cur-
rents over the device leads should be minimized, pack-
age leads should be short, and the two input leads
should be as close together as possible and maintained
at the same temperature.
Offset-Voltage Adjustment
The input offset voltage of the MXL1001, and its temper-
ature drift, are minimized by zener-zap trimming at the
wafer level. If further nulling of V
OS
is required, this can
be performed using a 10k
or 20k
potentiometer with
no degradation of V
OS
drift with temperature. Trimming
to a value other than zero creates a drift of
(V
OS
/300)V/C; i.e., if V
OS
is adjusted to 300V, the
change in drift will be 1V/C. The adjustment range
with a 10k
or 20k
potentiometer is approximately
2.5mV. If less adjustment range is needed, the sensi-
tivity and resolution of the offset nulling can be improved
by using a potentiometer of lower ohmic value in con-
junction with fixed resistors.
___________________Chip Topography
V
OUT
V-
+IN
0.076"
(1.93mm)
0.102"
(2.59mm)
V
OS
TRIM
-IN
V
OS
TRIM
V
OS
TRIM
V+
SUBSTRATE IS CONNECTED TO V-
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