EL2257C Elantec Semiconductor, EL2257C Datasheet - Page 19

• Manufacturer Part Number: EL2257C
• Description: 125 MHz Single Supply/ Clamping Op Amps
• Manufacturer: Elantec Semiconductor

EL2257C/EL2357C Macromodel (one channel)
* Revision A, October 1995
* Pin numbers reflect a standard single opamp.
* When not being used, the clamp pin, pin 1,
* should be connected to Vsupply, pin 7
* Connections:
*
*
*
*
*
*
.subckt EL2257/el 3
*
* Input Stage
*
i1 7 10 250µA
i2 7 11 250µA
r1 10 11 4K
q1 12 2 10 qp
q2 13 3 11 qpa
r2 12 4 100
r3 13 4 100
*
* Second Stage & Compensation
*
gm 15 4 13 12 4.6m
r4 15 4 15Meg
c1 15 4 0.36pF
*
* Poles
*
e1 17 4 15 4 1.0
r6 17 25 400
c3 25 4 1pF
r7 25 18 500
c4 18 4 1pF
*
* Connections:IN+IN+IN+IN+IN+IN+IN+INININININ
* Output Stage & Clamp
*
i3 20 4 1.0mA
q3 7 23 20 qn
q4 7 18 19 qn
q5 7 18 21 qn
q6 4 20 22 qp
q7 7 23 18 qn
d1 19 20 da
d2 18 1 da
r8 21 6 2
r9 22 6 2
r10 18 21 10k
r11 7 23 100k
d3 23 24 da
d4 24 4 da
d5 23 18 da
*
* Power Supply Current
*
ips 7 4 3.2mA
*
* Models
*
+input
|
|
|
|
|
|
-input
|
|
|
|
|
2
+Vsupply
|
|
|
|
7
-Vsupply
|
|
|
4
output
|
|
6
clamp
|
1
19
125 MHz Single Supply, Clamping Op Amps
EL2257C/EL2357C