REV. A
OP285
–12–
OP285 SPICE Model
* Node assignments
* noninverting input
* inverting input
* positive supply
* negative supply
* output
*
*
.SUBCKT OP285 1 2 99 50 34
*
* INPUT STAGE & POLE AT 100 MHZ
*
R3 5 51 2.188
R4 6 51 2.188
CIN 1 2 1.5E-12
C2 5 6 364E-12
I1 97 4 100E-3
IOS 1 2 1E-9
EOS 9 3 POLY(1) 26 28 35E-6 1
Q1 5 2 7 QX
Q2 6 9 8 QX
R5 7 4 1.672
R6 8 4 1.672
D1 2 36 DZ
D2 1 36 DZ
EN 3 1 100 1
GN1 0 2 13 0 1
GN20 1 16 0 1
*
EREF 98 0 28 0 1
EP 97 0 99 0 l
EM 510 50 0 1
*
* VOLTAGE NOISE SOURCE
*
DN1 35 10 DEN
DN2 10 11 DEN
VN1 35 0 DC 2
VN2 0 11 DC 2
*
* CURRENT NOISE SOURCE
*
DN3 12 13 DIN
DN4 13 14 DIN
VN3 12 0 DC 2
VN4 0 14 DC 2
CN1 13 0 7.53E-3
*
* CURRENT NOISE SOURCE
*
DN5 15 16 DIN
DN6 16 17 DIN
VN5 15 0 DC 2
VN6 0 17 DC2
CN2 16 0 7.53E-3
*
* GAIN STAGE & DOMINANT POLE AT 32 HZ *
R7 18 98 1.09E6
C3 18 98 4.55E-9
G1 98 18 5 6 4.57E-1
V2 97 19 1.4
V3 20 51 1.4
D3 18 19 DX
D4 20 18 DX
*
* POLE/ZERO PAIR AT 1.5MHz/2.7MHz
*
R8 21 98 1E3
R9 21 22 1.25E3
C4 22 98 47.2E-12
G2 98 21 18 28 1E-3
*
* POLE AT 100 MHZ
*
R10 23 98 1
C5 23 98 1.59E-9
G3 98 23 21 28 1
*
* POLE AT 100 MHZ
*
R11 24 98 l
C6 24 98 1.59E-9
G4 98 24 23 28 1
*
* COMMON-MODE GAIN NETWORK WITH ZERO AT
1 kHZ *
R12 25 26 1E6
C7 25 26 1.59E-12
R13 26 98 1
E2 25 98 POLY(2) 1 98 2 98 0 2.506 2.506
*
* POLE AT 100 MHZ
*
R14 27 98 1
C8 27 98 1.59E-9
G5 98 27 24 28 1
*
* OUTPUT STAGE
*
Rl5 28 99 100E3
R16 28 50 100E3
C9 28 50 1 E-6
ISY 99 50 1.85E-3
R17 29 99 100
R18 29 50 100
L2 29 34 1E-9
G6 32 50 27 29 10E-3
G7 33 50 29 27 10E-3
G8 29 99 99 27 10E-3
G9 50 29 27 50 10E-3
V4 30 29 1.3
V5 29 31 3.8
F1 29 0 V4 1
F2 0 29 V5 1
D5 27 30 DX
D6 31 27 DX
D7 99 32 DX
D8 99 33 DX
D9 50 32 DY
D10 50 33 DY
*
* MODELS USED
*
.MODEL QX PNP(BF = 5E5)
.MODEL DX D(IS = lE-12)
.MODEL DY D(IS = lE-15 BV = 50)
.MODEL DZ D(IS = lE-15 BV = 7.0)
.MODEL DEN D(IS = lE-12 RS = 4.35K KF = 1.95E-15
AF = l) .MODEL DIN D(IS = lE-12 RS = 77.3E-6
KF = 3.38E-15 AF = 1) .ENDS OP-285
REV. A
OP285
–13–
E
M
R4
C2
56
Q1
Q2
3
7
8
9
R3
36
D2
D1
C
IN
2
1
IN
+IN
I
OS
R5
R6
4
I1
E
P
97
E
N
E
OS
35
10
11
V
N1
V
N2
D
N1
D
N2
12
13
14
V
N3
V
N4
D
N3
D
N4
C
N1
15
16
17
V
N5
V
N6
D
N5
D
N6
C
N2
Figure 19a. Spice Diagram
G1
R7
21
C3
V3
97
51
D4
20
G2
R8
C4
R9
23
G3
R10
C5
24
G4
R11
C6
V2
D3
19
26
E2
R13
25
R12
C7
Figure 19b. Spice Diagram
I
SY
R15
V5
D8
G3
R16
G8
R17
V4
D7
R18
27
G5
R14
C8
C9
D6
D5
99
28
30
29
F1
31
32 33
D10
G7
G6
D9
50
98
F2
34
OUTPUT
L2
Figure 19c. Spice Diagram
REV. A
OP285
–14–
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
8-Lead PDIP Package
(N-8)
0.200 (5.05)
0.125 (3.18)
0.150
(3.81)
MIN
0.210
(5.33)
MAX
0.430 (10.92)
0.348 (8.84)
0.280 (7.11)
0.240 (6.10)
4
5
8
1
0.070 (1.77)
0.045 (1.15)
0.022 (0.558)
0.014 (0.356)
0.325 (8.25)
0.300 (7.62)
0- 15
0.100
(2.54)
BSC
0.015 (0.381)
0.008 (0.204)
SEATING
PLANE
0.060 (1.52)
0.015 (0.38)
8-Lead SOIC Package
(R-8)
SEATING
PLANE
SEE DETAIL
ABOVE
4
5
8
1
0.0688 (1.75)
0.0532 (1.35)
0.0098 (0.25)
0.0075 (0.19)
0.1574 (4.00)
0.1497 (3.80)
0.2440 (6.20)
0.2284 (5.80)
0.1968 (5.00)
0.1890 (4.80)
0.0192 (0.49)
0.0138 (0.35)
0.0500
(1.27)
BSC
0.0098 (0.25)
0.0040 (0.10)
× 45
0.0196 (0.50)
0.0099 (0.25)
0.0500 (1.27)
0.0160 (0.41)
PIN 1
0
- 8

OP285GSZ

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Precision Amplifiers 9MHz Prec Dual 5mA 250uV
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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