19-2772; Rev 3a; 1/98
High-Precision, Low-Voltage,
Micropower Op Amp
Features
The MAX480 is a precision micropower operational amplifier with flexible power-supply capability. Its guaranteed
140µV maximum offset voltage (25µV typ) is the lowest of
any micropower op amp. Similarly, input bias current,
input offset current, and drift specifications are within tight
limits.
♦ Single- or Dual-Supply Operation: +1.6V to +36V,
±0.8V to ±18V
Both the input and output voltage ranges include the negative supply rail, allowing maximum signal range capability in single-supply applications. The MAX480 operates
with either a single supply ranging from +1.6V to +36V or
dual supplies from ±0.8V to ±18V. The MAX480 consumes less than 20µA, allowing operation in excess of
10,000 hours from a 250mA-hr lithium coin cell. Even with
a minimal quiescent current, the amplifier sinks or sources
5mA from its output.
♦ 20µA Max Supply Current
♦ True Single-Supply Operation: Input and Output
Voltage Ranges Include Ground
♦ 2.0µV/°C Max Offset Voltage Drift
♦ 5mA Min Output Drive
♦ 140µV Max Input Offset Voltage
♦ 3nA Max Input Bias Current
♦ 500V/mV Min Open-Loop Gain
♦ Standard 741 Pinout with Nulling to V-
The MAX480 is available in 8-pin DIP and SO packages in
commercial, extended, and military temperature ranges.
Ordering Information
PART
Applications
Precision Micropower Amplifiers
Micropower Signal Processing
Battery-Powered Analog Circuits
MAX480CPA
MAX480CSA
MAX480EPA
MAX480ESA
MAX480MJA
TEMP. RANGE
PIN-PACKAGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 CERDIP
Pin Configuration
Typical Operating Circuit
V+ (5V)
TOP VIEW
R2
10k
R1
10k
2
VIN
7
NULL 1
IN914
6
HP5082-2800
3
OUT
MAX480
4
8
N.C.
7
V+
3
6
OUT
V- 4
5
NULL
IN- 2
MAX480
R3
100k
IN+
DIP/SO
SINGLE OP AMP FULL-WAVE RECTIFIER
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX480
General Description
MAX480
High-Precision, Low-Voltage,
Micropower Op Amp
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V+ to V-) ....................................................±18V
Differential Input Voltage ........................(V- - 20V) to (V+ + 20V)
Common-Mode Input Voltage ................(V- - 20V) to (V+ + 20V)
Output Short-Circuit Duration ........................................Indefinite
Continuous Power Dissipation
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C) ..............................471mW
CERDIP (derate 8.0mW/°C above +70°C) ....................640mW
Operating Temperature Ranges
MAX480C_A.........................................................0°C to +70°C
MAX480E_A ......................................................-40°C to +85°C
MAX480MJA ...................................................-55°C to +125°C
Junction Temperature (TJ).................................-65°C to +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VS = ±1.5V to ±15V, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Input Offset Voltage
VOS
Input Offset Current
IOS
VCM = 0
IB
VCM = 0
Input Bias Current
Large-Signal Voltage Gain
AVO
VS = ±15V,
VO = ±10V
V+ = 5V, V- = 0,
1V < VO < 4V
Input Voltage
IVR
VO
Output Voltage Swing
PSRR
SR
Supply Current
ISY
Capacitive Load Stability
Input Noise Voltage
nA
1
3
nA
600
RL = 2kΩ
75
250
RL = 100kΩ
100
400
50
180
RL = 10kΩ
VS = ±15kV (Note 1)
V
-15/13.5
RL = 10kΩ
±14
±14.2
RL = 2kΩ
±11
±12
4.0
V
4.2
100
V+ = 5V, V- = 0, 0 < VCM < 4V
85
110
VS = ±15V, -15V < VCM < 13.5V
90
130
VS = ±15V
5
1.0
500
µV
dB
12
12
µV/V
V/ms
VS = ±1.5V
9
15
VS = ±15V
14
20
250
UNITS
V/mV
0/4
AV = +1V/V, no oscillations (Note 2)
µA
650
pF
fO = 0.1Hz to 10Hz, VS = ±15V
3
µVp-p
Differential-Mode Input Resistance
RIN
VS = ±15V
30
MΩ
Common-Mode Input Resistance
RINCM
VS = ±15V
20
GΩ
2
enp-p
1
200
V+ = 5V, V- = 0, RL = 10kΩ
Slew Rate
µV
0.2
RL = 10kΩ
V+ = 5V, V- = 0, RL = 2kΩ
Power-Supply Rejection Ratio
140
1200
VOL
CMRR
MAX
25
500
VOH
Common-Mode Rejection Ratio
TYP
RL = 100kΩ
V+ = 5V, V- = 0
VS = ±15V
MIN
_______________________________________________________________________________________
High-Precision, Low-Voltage,
Micropower Op Amp
(VS = ±1.5V to ±15V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER SYMBOL
CONDITIONS
MAX480C
MIN TYP MAX
MAX480E
MIN TYP MAX
MAX480M
MIN TYP MAX
UNITS
40
220
50
250
70
300
µV
Input Offset
Voltage
VOS
Input Offset
Voltage Drift
TCVOS
(Note 2)
0.3
2.0
0.3
2.0
0.3
2.0
µV/°C
Input Offset
Current
IOS
VCM = 0
0.2
2.0
0.3
2.0
0.5
2.0
nA
IB
VCM = 0
1
3
2
5
3
7
nA
Input Bias
Current
Large-Signal
Voltage Gain
Input Voltage
Range
VS = ±15V,
V = ±10V
AVO
V+ = 5V,
V- = 0,
1V < VO < 4V
IVR
VO
Output Voltage
Swing
Common-Mode
Rejection Ratio
VS = ±15V
VOL
V+ = 5V, V- = 0
RL = 10kΩ
PSRR
Supply Current
ISY
950
350
800
60
400
130
400
130
400
45
240
RL = 2kΩ
55
125
55
150
30
110
RL = 100kΩ
50
360
50
280
35
200
30
150
30
140
22
110
RL = 10kΩ
0/3.5
VS = ±15V (Note 1)
V+ = 5V, V- = 0
RL = 2kΩ
Power-Supply
Rejection Ratio
350
RL = 10kΩ
V+ = 5V, V- = 0
VOH
CMRR
RL = 100kΩ
0/3.5
0/3.5
V
-15/13.5
-15/13.5
-15/13.5
RL = 10kΩ
±13.5 ±14
±13.5 ±14
±13.5 ±13.7
RL = 2kΩ
±10.5 ±11.8
±10.5 ±11.8
±10.5 ±11.5
3.9
4.1
100
3.9
500
V/mV
4.1
100
3.9
500
V
4.1
100
V+ = 5V, V- = 0,
0 < VCM < 3.5V
85
110
85
110
80
105
VS = ±15V,
-15V < VCM < 13.5V
90
120
90
120
85
115
500
µV
dB
1.0
12
1.0
12
3.2
15
VS = ±1.5V
12
25
13
25
15
25
VS = ±15V
16
30
17
30
19
30
µV/V
µA
Note 1: Guaranteed by CMRR test.
Note 2: Guaranteed by design.
_______________________________________________________________________________________
3
MAX480
ELECTRICAL CHARACTERISTICS
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
INPUT OFFSET CURRENT
vs. TEMPERATURE
1.2
0.6
0.4
0.4
0
-25
0
25
50
75
0
25
50
75
-75
100 125
25
50
75
100 125
OPEN-LOOP GAIN AND
PHASE SHIFT vs. FREQUENCY
600
MAX480-04
RL = 10kΩ
10
VS = ±1.5V
TA = +25°C
500
OPEN-LOOP GAIN (V/mV)
VS = ±15V
6
TA = +85°C
400
300
140
TA = +125°C
200
100
-25
0
25
50
75
0
100 125
0
100
GAIN
80
45
40
135
20
180
5
10
15
20
25
0.1
30
1
10
100
1k
10k
TEMPERATURE (°C)
SINGLE-SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
CLOSED-LOOP GAIN
vs. FREQUENCY
OUTPUT VOLTAGE SWING
vs. LOAD RESISTANCE
OUTPUT VOLTAGE SWING
vs. LOAD RESISTANCE
40
20
0
V+ = 5V
V- = 0
5
4
3
2
1
100
1k
FREQUENCY (Hz)
10k
100k
POSITIVE SUPPLY
14
NEGATIVE SUPPLY
12
10
8
6
4
2
VS = ±15V
0
-20
100k
16
OUTPUT VOLTAGE SWING (V)
OUTPUT VOLTAGE SWING (V)
VS = ±15V
MAX480-08
6
MAX480-07
60
90
PHASE
60
0
0
2
VS = ±15V
RL = 100kΩ
120
4
10
0
OPEN-LOOP GAIN vs.
SINGLE-SUPPLY VOLTAGE
14
-50
-25
SUPPLY CURRENT
vs. TEMPERATURE
16
-75
-50
TEMPERATURE (°C)
18
8
-25
TEMPERATURE (°C)
NO LOAD
12
-50
TEMPERATURE (°C)
22
20
0
-75
100 125
OPEN-LOOP GAIN (dB)
-50
MAX480-05
-75
SUPPLY CURRENT (µA)
0.6
0.2
0.2
0
4
0.8
0
100
1k
10k
LOAD RESISTANCE (Ω)
100k
100
1k
10k
LOAD RESISTANCE (Ω)
_______________________________________________________________________________________
100k
PHASE SHIFT (DEGREES)
20
0.8
MAX480-06
40
1.0
MAX480-09
60
VS = ±15V
1.0
INPUT BIAS CURRENT (nA)
80
1.2
MAX480-02
VS = ±15V
INPUT OFFSET CURRENT (nA)
VS = ±15V
INPUT OFFSET VOLTAGE (µV)
1.4
MAX480-01
100
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX480-03
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
CLOSED-LOOP GAIN (dB)
MAX480
High-Precision, Low-Voltage,
Micropower Op Amp
High-Precision, Low-Voltage,
Micropower Op Amp
NEGATIVE SUPPLY
80
POSITIVE SUPPLY
60
40
20
120
100
80
60
40
1
10
100
1k
VS = ±15V
100
10
1
1
10
100
1k
0.1
1
10
100
CURRENT NOISE DENSITY
vs. FREQUENCY
SMALL-SIGNAL
TRANSIENT RESPONSE
LARGE-SIGNAL
TRANSIENT RESPONSE
1k
MAX480-14
MAX480-15
FREQUENCY (Hz)
MAX480-13
FREQUENCY (Hz)
VS = ±15V
MAX480-12
1000
FREQUENCY (Hz)
100
CURRENT NOISE DENSITY (pA/√Hz)
VS = ± 15V
NOISE VOLTAGE DENSITY
vs. FREQUENCY
NOISE VOLTAGE DENSITY (nV/√Hz)
MAX480-10
100
140
COMMON-MODE REJECTION (dB)
POWER-SUPPLY REJECTION (dB)
120
COMMON-MODE REJECTION
RATIO vs. FREQUENCY
MAX480-11
POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
10
1
0.1
0.1
1
10
FREQUENCY (Hz)
100
1k
100µs/div
VS = ±15V, AV = +1,
RL = 10kΩ, CL = 500pF
1ms/div
VS = ±15V, AV = +1,
RL = 10kΩ, CL = 500pF
_______________________________________________________________________________________
5
MAX480
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
V+
+15V
IN-
2
7
6
IN+
MAX480
3
2
OUT
7
4
5
1
6
3
MAX480
4
100k
-15V
V-
Figure 1. Offset Nulling Circuit
Figure 2. Burn-In Circuit
Package Information
SOICN.EPS
MAX480
High-Precision, Low-Voltage,
Micropower Op Amp
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.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.