a
FEATURES
Low Supply Current: 200 A Max @ V
S
= 5 V
Single-Supply Operation: 5 V to 30 V
Dual-Supply Operation: 2.5 V to 15 V
Low Input Offset Voltage: 500 V Typ
Low Input Offset Voltage Drift: 5 V/ C Typ
High Common-Mode Input Range: V– to (V+ – 1.5 V)
High CMRR: 100 dB Typ
High Open-Loop Gain: 1100 V/mV Typ
LM 148 Pinout
OUT 1
–IN 1
+IN 1
V+
+IN 2
–IN 2
OUT 2
1
2
3
4
5
6
7
+
+
+
+
Quad Micropower
Operational Amplifier
OP420
PIN CONNECTIONS
14 OUT 4
13 –IN 4
12 +IN 4
11 V–
10 +IN 3
9 –IN 3
8 OUT 3
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
N.C. 8
+
+
+
+
16 OUT D
15 –IN D
14 +IN D
13 V–
12 +IN C
11 –IN C
10 OUT C
9 N.C.
GENERAL DESCRIPTION
14-Pin Hermetic DIP
(Y-Suffix)
14-Pin Epoxy DIP
(P-Suffix)
OUT1
OUT4
–IN1
–IN4
NC
The OP420 quad micropower operational amplifier is a single-
chip quad patterned after the OP20 precision micropower single
operational amplifier. A Darlington PNP input stage allows the
input common-mode voltage to include V–. The wide input
range combined with low power supply drain (~40
µA/section
at
5 V) provides a unique solution for designs requiring high func-
tional density and portable operation. Applications include
2-wire transmitters for process control loops, battery-operated
remote-line filters, signal preconditioning amplifiers, and a
variety of multiple-gain block arrays.
16-Pin SOL
(S-Suffix)
3
2
1
20
19
18
17
16
15
14
+IN1
NC
V+
NC
+IN2
4
5
6
7
8
9
10
11
12
13
+IN4
NC
V–
NC
+IN3
–IN2
OUT2
OP420CRC/883
20-Lead LCC
(RC-Suffix)
V+
Q11
Q3
–IN
Q1
Q4
Q2
Q9
–IN
Q7
C1
Q5
Q6
Q13
Q33
V–
Q29
Q10
Q8
Q27
Q12
Q26
Q28
OUTPUT
Figure 1. Simplified Schematic (1/4 Shown)
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
OUT3
–IN3
NC
OP420–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
Parameter
INPUT OFFSET VOLTAGE
INPUT OFFSET
CURRENT*
INPUT BIAS CURRENT*
INPUT NOISE VOLTAGE
DENSITY
INPUT NOISE CURRENT
DENSITY
INPUT VOLTAGE RANGE
COMMON-MODE
REJECTION RATIO
Symbol
V
OS
I
OS
I
B
e
n
(V
S
=
15 V, TA = 25 C, unless otherwise noted.)
OP420C
OP420G
Typ
1
0.8
12
50
50
0.12
0.12
0/3.5
–15/13.5
80
80
96
96
20
50
Conditions
V
S
=
±
2.5 V to
±
15 V
V
S
=
±
2.5 V to
±
15 V
V
S
=
±
2.5 V to
±
15 V
f
O
= 10 Hz
f
O
= 100 Hz
f
O
= 10 Hz
f
O
= 100 Hz
V+ = 5 V, V– = 0 V
V
S
=
±
15 V
V+ = 5 V, V– = 0 V
0 V
≤
V
CM
≤
3.5 V
V
S
=
±
15 V
–15 V
≤
V
CM
≤
13.5 V
V
S
=
±
2.5 V to
±
15 V,
V– = 0 V, V+ = 5 V to 30 V
R
L
= 25 kΩ,
V
O
=
±
10 V
Min
Max
4
2.5
30
Unit
mV
nA
nA
nV/√Hz
nV/√Hz
pA/√Hz
pA/√Hz
V
V
dB
dB
µV/V
i
n
IVR
CMRR
POWER SUPPLY
REJECTION RATIO
LARGE SIGNAL VOLTAGE
GAIN
SLEW RATE
CLOSED-LOOP
BANDWIDTH
OUTPUT VOLTAGE
SWING
PSRR
A
VO
SR
BW
400
900
0.05
V/mV
V/µs
kHz
kHz
A
VCL
= 1.0
R
L
= 10 kΩ
V+ = 5 V, V– = 0 V,
R
L
= 10 kΩ
V
S
=
±
15 V
R
L
= 25 kΩ
V
S
=
±
2.5 V, No Load
V
S
=
±
15 V, No Load
150
150
V
O
0.8/4.0
±
14.0
—
170
360
300
460
V
V
µA
µA
SUPPLY CURRENT
(Four Amplifiers)
NOTE
*I
OS
and I
B
are measured at V
CM
= 0°.
I
SY
Specifications subject to change without notice.
–2–
REV. A
OP420
ELECTRICAL CHARACTERISTICS
Parameter
AVERAGE INPUT OFFSET
Voltage Drift
1
INPUT OFFSET
VOLTAGE
INPUT OFFSET
CURRENT
2
INPUT BIAS CURRENT
2
INPUT VOLTAGE RANGE
COMMON-MODE
Rejection Ratio
I
OS
I
B
IVR
CMRR
V
S
=
±
2.5 V to
±
15 V
V
S
=
±
2.5 V to
±
15 V
V+ = 5 V, V– = 0 V
V
S
=
±
15 V
V+ = 5 V, V– = 0 V,
0 V
≤
V
CM
≤
3.2 V
V
S
=
±
15 V
–15 V
≤
V
CM
≤
13.2 V
V
S
=
±
2.5 V to
±
15 V,
V– = 0 V, V+ = 5 V to 30 V
V
S
=
±
15 V, R
L
= 50 kΩ,
V
O
= 10 V
V+ = 5 V, V– = 0 V,
R
L
= 20 kΩ
V
S
=
±
15 V,
R
L
= 50 kΩ
V
S
=
±
2.5 V, No Load
V
S
=
±
15 V, No Load
0/3.2
–15/13.2
73
73
92
92
25
80
4
40
nA
nA
V
V
dB
dB
µV/V
V
OS
V
S
=
±
2.5 V to
±
15 V
5.5
mV
Symbol
TCV
OS
(V
S
= 15 V, –55 C
otherwise noted.)
+125 C for OP420C, –40 C
T
A
+85 C for OP420G, unless
Conditions
Unnulled
Min
OP420C/OP420G
Typ
Max
8
15
Unit
µV°C
POWER SUPPLY
Rejection Ratio
LARGE-SIGNAL
VOLTAGE GAIN
OUTPUT VOLTAGE
SWING
PSRR
A
VO
200
650
V/mV
V
O
1.0/3.8
±
13.8
210
420
400
640
V
V
µA
µA
SUPPLY CURRENT
(Four Amplifiers)
NOTES
1
Sample tested.
2
I
OS
and I
B
are measured at V
CM
= 0°.
I
SY
REV. A
–3–
OP420
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
18 V
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . .
±
30 V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . Supply Voltage
Output Short-Circuit Duration . . . . . . . . . . . . . . Continuous
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (One Amplifier Only)
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering, 60 sec) . . . . . . . 300°C
Operating Temperature Range
OP420CY, OP420CRC . . . . . . . . . . . . . . –55°C to +125°C
OP420G . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Junction Temperature (T
J
) . . . . . . . . . . . . . –65°C to +150°C
Package Type
14-Pin Hermetic DIP (Y)
14-Pin Plastic DIP (P)
16-Pin SOL (S)
JA
2
JC
Unit
°C/W
°C/W
°C/W
99
76
92
12
33
27
NOTES
1
Absolute Maximum Ratings apply to packaged parts, unless otherwise noted.
2
JA
is specified for worst-case mounting conditions, i.e.,
JA
is specified for
device in socket for CerDIP and P-DIP packages;
JA
is specified for device
soldered to printed circuit board for SOL package.
ORDERING GUIDE
Package Options
T
A
= 25°C V
OS
Max (mV)
4.0
4.0
4.0
Cer DIP 14-Pin
OP420CY*
LCC 20-Contact
OP420CRC/883
OP420GP*
OP420GS*
Plastic
Operating Temperature Range
MIL
XIND
XIND
*Not
for new design; obsolete April 2002.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the OP420 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4–
REV. A
Typical Performance Characteristics–OP420
120
100
700
14
INPUT OFFSET CURRENT – nA
INPUT BIAS CURRENT – nA
80
V
S
= 15V
R
L
= 25k
T
A
= 25 C
A
VCL = 1000
A
VCL = 100
600
500
400
300
200
100
0
-100
V
S
=
15V
12
10
8
6
4
2
0
-100
V
S
=
15V
GAIN – dB
60
40
20
0
A
VCL = 10
A
VCL = 1
-20
0.15
1.5
15
150
1.5k
15k
150k
-50
FREQUENCY – Hz
0
50
100
TEMPERATURE – C
150
-50
0
50
100
TEMPERATURE – C
150
TPC 1. Closed-Loop Gain vs. Frequency
TPC 2. Input Offset Current vs.
Temperature
TPC 3. Input Bias Current vs.
Temperature
T
A
= 25 C
V
S
=
15V
PEAK OUTPUT VOLTAGE – V
15
INPUT VOLTAGE NOISE DENISITY – nV/
Hz
INPUT CURRENT NOISE DENSITY – pA/
Hz
17
1000
10
1.0
10
100
5
V
S
= -5V
0.1
0
1k
10k
LOAD RESISTANCE –
100k
10
0.1
1
10
100
FREQUENCY – Hz
1000
.01
0.1
1.0
10
100
FREQUENCY – Hz
1000
TPC 4. Maximum Output Voltage
vs. Load Resistance
TPC 5. Input Voltage Noise Density
(e
n
) vs. Frequency
TPC 6. Input Current Noise Density
(i
n
) vs. Frequency
50mV
100
90
100
90
2V
10
0%
10
0%
20mV
2 s
5V
200 s
TPC 7. Small-Signal Transient
Response
TPC 8. Large-Signal Transient
Response
REV. A
–5–
WindowsCE
