CS3001-ISZR Cirrus Logic Inc, CS3001-ISZR Datasheet - Page 11
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CS3001-ISZR
Manufacturer Part Number
CS3001-ISZR
Description
IC OPAMP SGL PREC LOW-V 8-SOIC
Manufacturer
Cirrus Logic Inc
Datasheet
1.CS3001-ISZ.pdf
(16 pages)
Specifications of CS3001-ISZR
Amplifier Type
Instrumentation
Number Of Circuits
1
Output Type
Rail-to-Rail
Slew Rate
5 V/µs
Current - Input Bias
100pA
Voltage - Input Offset
10µV
Current - Supply
2.1mA
Voltage - Supply, Single/dual (±)
2.7 V ~ 6.7 V, ±1.35 V ~ 3.35 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC
For Use With
598-1495 - BOARD EVAL OPAMP FOR CS30XX
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output / Channel
-
-3db Bandwidth
-
Gain Bandwidth Product
-
The loop gain plot shown in
the unity gain configuration, and indicates how this
is modified when using the amplifier in a higher
gain configuration with compensation. If it is con-
figured for higher gain, for example, 60 dB, the
x–axis will move up by 60 dB (line B). Capacitor
C2 adds a zero and a pole. The modified plot indi-
cates the effects of introducing the pole and zero
due to capacitor C2. The pole can be located at any
frequency higher than the hand-over frequency, the
zero has to be at a frequency lower than the hand-
over frequency so as to provide adequate gain mar-
DS490F9
Figure 18. Loop Gain Plot: Unity Gain and with Pole-zero Compensation
Figure 18
illustrates
-20 dB/dec
FREQUENCY
-100 dB/dec
50kHz
X
z
Margin
1
gin. The separation between the pole and the zero
is governed by the closed loop gain. The zero (z
occurs at the intersection of the –100 dB/decade
and –80 dB/decade slopes. The point X in the fig-
ure should be at closed loop gain plus 20 dB gain
margin. The value for C2 = 1/(2π R1 P1). Setting
the pole of the filter to P1 = 1 MHz works very well
and is independent of gain. As the closed loop gain
is changed, the zero location is also modified if R1
remains fixed. Capacitor C2 can be increased in
value to limit the amplifier’s rising noise above
2 kHz.
-80 dB/dec
1MHz
Desired Closed
5MHz
Loop Gain
p
1
B
CS3001
CS3002
11
1
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