LT1251/LT1256
W
W
ACRO ODEL
LT1251/LT1256 Macro Model for PSpice
PIN # IN
NODE # IN
K GENERATOR
NOISE GENERATOR
FIRST INPUT STAGE
R1
27Ω
2
V
OS1
2A
K
EN
1
I
RI
C1
1.5pF
B1
C2
1pF
1
2B
R
R
R
NOISE2
200k
E1
DUMMY
NOISE1
500nA
E
K
17M
1M
200k
NULL CIRCUIT
SECOND INPUT STAGE
R2
27Ω
13
V
OS2
R
13A
N2
V
NULL
6A
400Ω
14
6
I
RI
C13
1pF
C14
1.5pF
B2
2
13B
E2
R
450nA
N1
17M
6B
C6
G
NULL
200Ω
1pF
7
CONTROL AMP
SUPPLY CURRENTS
R3
1.6k
R
C
4
V
OSC
3A
3B
5k
3
9
7
5
9
7
I
RI
C
C3
1pF
C
BWC
10pF
BC
C4
1pF
C5
1pF
E
C
G
Q
G
EE
G
–300nA
100M
CC
1251/56 MM
FULL SCALE AMP
R12
1.6k
11
R
FS
5k
V
OSFS
12A
12B
12
10
I
RI
FS
100M
C12
1pF
C
BWFS
10pF
BFS
C11
1pF
C10
1pF
E
FS
–300nA
OUTPUT STAGE AND VOLTAGE SWING/CURRENT LIMIT
R8
11Ω
R
G
V8
8D
8B
8A
8C
1.8M
8
D
D
N
P
C
G
8P
8N
3.4pF
V
DP
V
DN
G
E6
E8
CL
9
7
22
Linear [ Linear ]
