op497fy Analog Devices, Inc., op497fy Datasheet - Page 11

• Manufacturer Part Number: op497fy
• Description: Precision Picoampere Input Current Quad Operational Amplifier
• Manufacturer: Analog Devices, Inc.

RIN1 1
RIN2 2
R1
R2
R3
R4
CIN 7
C2
I1
IOS 7
EOS 9
Q1
Q2
R5
R6
D1
D2
EREF 98
R7
C3
G1
V1
V2
D3
D4
RCM1 15 16
CCM
RCM2 16 98
ECM
SUBCKT OP497 1
GAIN STAGE AND DOMINANT POLE AT 0.11 Hz
COMMON-MODE GAIN NETWORK WITH ZERO AT 50 MHz
Node assignments
INPUT STAGE AND POLE AT 6 MHz
8
7
5
6
5
4
5
6
10
11
8
9
1
2
98
99
11
12
14
15 16
15 98
7
8
3
3
99
99
8
6
50
8
7
8
9
4
4
9
8
0
98
98
12
13
9
13
12
noninverting input
2500
2500
6.782E8
6.782E8
542.57
542.57
3E-12
24.445E-12
0.1E-3
15E-12
POLY(1) 16
10 QX
11 QX
25.374
25.374
DX
DX
21 0
2.1703E9
666.67E-12
5
1.275
DX
DX
1E6
1
3
1.275
3.18E-9
inverting input
2
21
positive supply
99
1
177.83E-3
negative supply
50 27
21 40E-6
output
Table I. OP497 SPICE Net-List
1
E1
R8
C4
R9
G2
R15
C8
G6
R20
C10
R16
R17
ISY
V3
D5
V4
D6
D7
G4
D9
D8
G5
D10
G6
R18
G7
R19
L1
.MODEL QX NPN (BF = 1.25E6)
.MODEL DX (IS = 1E-15)
.MODEL DZ D(IS = 1E-15 BV = 50)
.ENDS OP497
NEGATIVE ZERO AT 1.8 MHz
POLE AT 6 MHz
POLE AT 1.8 MHz
OUTPUT STAGE
MODELS USED
17 98
17 18
17 18
18 98
98 19
20 98
20 98
98 20
20 98
20 98
99 21
21 50
99 50
23 22
20 23
22 24
24 20
99 25
25 50
50 25
99 26
26 50
50 26
22 99
99 22
50 22
22 50
22 27
12 21
1E6
–88.419E-15
1
18 21
1E6
26.526E-15
19 21
1E6
88.419E-15
160 k
160 k
331E-6
1.9
DX
1.9
DX
DX
20 22
DY
DX
22 20
DY
99 20
200
20 50
200
0.1E-6
1E6
1E-6
1E-6
5E-3
5E-3
5E-3
5E-3
OP497