RC4157M Fairchild Semiconductor, RC4157M Datasheet - Page 9

• Manufacturer Part Number: RC4157M
• Description: Op Amps
• Manufacturer: Fairchild Semiconductor

Specifications of RC4157M

• Number Of Channels: 4
• Voltage Gain Db: 100 dB
• Common Mode Rejection Ratio (min): 80 dB
• Input Offset Voltage: 5 mV
• Supply Current: 7 mA
• Maximum Power Dissipation: 300 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-14 Wide
• Maximum Dual Supply Voltage: +/- 20 V
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: No

RC4156/RC4157
These equations can be combined to obtain the transfer function:
Defining 1/R1C1 as 1, 1/R2C2 as 2, and substituting in
the assigned values for R4, R5, and R6, then the transfer
function simplifies to:
This is now in a convenient form to look at the center-
frequency
The frequency responses for various values of Q are shown
in Figure 17.
REV. 1.0.1 6/13/01
Q
V
V
----------------- -
V
0
0
BP
V
----------------- -
BP
V
IN
=
=
=
BP
IN
s
s
s
10
--------------------- -
1.1
1
0.1
s
s
9 –
=
+
=
+
=
10
------- -
R7
–
----------------------------------------------------------------------
S
0
10
------- -
1 2
0.1R1R2
R3
----------------- -V
R1C1S
2
------------------------------------------------------------------------------------------------------------------------------------------------------ -
S
5
and filter Q.
4
+
2
1
+
1.1
--------------------- -
and Q
0
-------------------- - 1
R6
Gain
1
Trim
+
R7
10
------- -
+
R3
+
HP
10
------- -
R7
V
and
10
------- -
R3
4
R7
IN
5
4
s
1
s
1
R3
+
R7
and
s
R4
------ -
R5
+
------------ -
+
1 2
1
V
R4
------ -
R3
R4
------ -
R3
LP
2
3
-------------- - S
R1C1
RC4156/57
s
-------------- - S
R1C1
10K
1
R4
1
=
Figure 16. Bandpass Active Filter
A
–
----------------- -V
R2C2S
1
+
1
100K
R5
R4
------ -
R5
100K
R6
BP
R1
----------------------------- -
R1C1R2C2
s
Set Center Frequency
1
Figure 17. Bandpass Transfer Characteristics Normalized
6
5
-10
-20
-30
-40
-50
-60
RC4156/57
0
0.1
1000 pF
B
C1
V
V
BP
7
IN
for Unity Gain and Frequency
=
R2
1 -
V
BP
o
10
9
2 2
1.0
o
o
+
1000 pF
RC4156/57
1
Q
PRODUCT SPECIFICATION
C2
65-0752
1
Q
C
8
o
Q = 0.5
Q = 1.0
Q = 2.0
Q = 5.0
Q = 10
Q = 20
Q = 50
Q = 100
2
10
9