CS3001-ISZ Cirrus Logic Inc, CS3001-ISZ Datasheet - Page 9

• Manufacturer Part Number: CS3001-ISZ
• Description: IC OPAMP SGL PREC LV 8-SOIC
• Manufacturer: Cirrus Logic Inc

Specifications of CS3001-ISZ

• 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: -
• Other names: 598-1140-5

3.2
3.2.1
The CS3001 and CS3002 achieve ultra-high open
loop gain.
non-inverting gain configuration. The open loop
gain and phase plots indicate that the amplifier is
stable for closed-loop gains less than 50 V/V and
R1 ≤ 100 Ohms. For a gain of 50, the phase margin
is between 40° and 60° depending upon the loading
conditions. As shown in
operational amplifier has an input capacitance at
the + and – signal inputs of typically 50 pF. This
DS490F9
Open-loop Gain and Stability Compensation
Discussion
Figure 16
illustrates the amplifier in a
Figure 17, on page
V in
Figure 16. Non-inverting Gain Configuration
R
S
R 1
10, the
capacitance adds an additional pole in the loop gain
transfer function at a frequency of f = 1/(2πR*C
where R is the parallel combination of R1 and R2
(R1 || R2). A higher value for R produces a pole at
a lower frequency, thus reducing the phase margin.
R1 is recommended to be less than or equal to 100
ohms, which results in a pole at 30 MHz or higher.
If a higher value of R1 is desired, a compensation
capacitor (C2) should be added in parallel with R2.
C2 should be chosen such that R2*C2 ≥ R1*C
R 2
V o
CS3001
CS3002
in
in
.
9
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