LT1251 Linear Technology, LT1251 Datasheet - Page 20

• Manufacturer Part Number: LT1251
• Description: 40MHz Video Fader and DC Gain Controlled Amplifier
• Manufacturer: Linear Technology

W
For PSpice
*
* Linear Technology LT1251/LT1256 VIDEO FADER MACROMODEL
* Written: 3-11-1994 BY WILLIAM H. GROSS.
* Corrected: 7-15-1996
* Connections: as per datasheet pinout
*1=first noninverting input
*2=first inverting input
*3=control voltage input
*4=control current input
*5=control resistor, RC
*6=null input
*7=negative supply
*8=output
*9=positive supply
*10=full scale resistor, RFS
*11=full scale current input
*12=full scale voltage input
*13=second inverting input
*14=second noninverting input
*
.SUBCKT LT1251 1 2 3 4 5 6 7 8 9 10 11 12 13 14
*
*first input stage
IB1
RI1
C1
E1
VOS1
R1
C2
*
*second input stage
IB2
RI2
C14
E2
VOS2
R2
C13
*
*control amp
IBC
RIC
C3
R3
CBWC
EC
VOSC
C4
RC
C5
*
LT1251/LT1256
20
ACRO ODEL
13A
13A
13B
2A
2A
2B
14
14
14
13
3A
3B
3B
TM
1
1
1
2
3
3
3
3
4
4
5
W
13B
2B
13
3A
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
4
0
5
0
500NA
17MEG
1.5PF
VALUE={LIMIT (V(1), V(8N)+0.4, V(8P)–0.4)+V(EN)/30}
2.5MV
27
1PF
450NA
17MEG
1.5PF
VALUE={LIMIT (V(14), V(8N)+0.4, V(8P)–0.4)+V(EN)/30}
1.5MV
27
1PF
–300NA
100MEG
1PF
1600
10PF
3A
5MV
1PF
5K
1PF
0
1.0
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