MAX4492AUD-T Maxim Integrated, MAX4492AUD-T Datasheet - Page 7

• Manufacturer Part Number: MAX4492AUD-T
• Description: Operational Amplifiers - Op Amps High-Slew-Rate Rail-Rail
• Manufacturer: Maxim Integrated

Specifications of MAX4492AUD-T

• Number Of Channels: 4
• Common Mode Rejection Ratio (min): 54 dB
• Input Offset Voltage: 10 mV
• Input Bias Current (max): 2.5 nA
• Operating Supply Voltage: 2.7 V to 5.5 V, +/- 1.35 V to +/- 2.75 V
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-14
• Slew Rate: 10 V/us
• Shutdown: No
• Output Current: 50 mA
• Maximum Operating Temperature: + 125 C
• Amplifier Type: General Purpose Amplifier
• Gain Bandwidth Product: 10 MHz
• Maximum Dual Supply Voltage: +/- 2.75 V
• Minimum Dual Supply Voltage: +/- 1.35 V
• Minimum Operating Temperature: - 40 C
• Supply Current: 0.8 mA
• Technology: CMOS
• Voltage Gain Db: 110 dB

In conjunction with op amp output resistance, capaci-
tive loads introduce a pole frequency that can reduce
phase margin and lead to unstable operation. The
MAX4490/MAX4491/MAX4492 drive capacitive loads
up to 300pF without significant degradation of step
response and slew rate (Figure 4). Capacitive-Load
Stability (page 1) shows regions of stable and margin-
ally stable (step overshoot <10%) operation for different
combinations of capacitive and resistive loads.
Figure 3. Step Response With and Without Feedback
Compensation
3a)
3b)
A
A
V
V
= -1, R
= -1, R
WITHOUT FEEDBACK COMPENSATION
WITH FEEDBACK COMPENSATION
_______________________________________________________________________________________
L
L
= 4kΩ, C
= 4kΩ, C
Driving Capacitive Loads
f
f
= 5pF
= 0
Rail-to-Rail I/O Op Amps in SC70
Low-Cost, High-Slew-Rate,
Improve stability for large capacitive loads by adding
an isolation resistor (typically 10Ω) in series with the
output (Figure 5). Note that the isolation resistor forms a
voltage divider with potential for gain error.
MAX4490 TRANSISTOR COUNT: 60
MAX4491 TRANSISTOR COUNT: 120
MAX4492 TRANSISTOR COUNT: 240
SUBSTRATE CONNECTED TO V
Figure 4. Step Response With and Without Capacitive Loading
4a)
4b)
A
A
V
V
= +1, R
= +1, R
WITHOUT CAPACITIVE LOADING
L
L
= 100kΩ, C
WITH CAPACITIVE LOADING
= 100kΩ, C
L
L
= 0
= 300pF
Chip Information
SS
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