MAX4491AUA+T Maxim Integrated Products, MAX4491AUA+T Datasheet - Page 5

• Manufacturer Part Number: MAX4491AUA+T
• Description: IC OP AMP DUAL R-R I/O 8-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX4491AUA+T

• Amplifier Type: General Purpose
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 10 V/µs
• Gain Bandwidth Product: 10MHz
• Current - Input Bias: 50pA
• Voltage - Input Offset: 1500µV
• Current - Supply: 800µA
• Current - Output / Channel: 50mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 5.5 V, ±1.35 V ~ 2.75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -

The MAX4490/MAX4491/MAX4492 CMOS operational
amplifiers have parallel-connected N- and P-channel
differential input stages that combine to accept a com-
mon-mode range extending to both supply rails. The N-
channel stage is active for common-mode input
voltages typically greater than (V
channel stage is active for common-mode input volt-
ages typically less than (V
The MAX4490/MAX4491/MAX4492 CMOS operational
amplifiers feature class-AB push-pull output stages that
can drive a 100kΩ load to within 1.5mV of either supply
rail. Short-circuit output current is typically ±50mA.
Figures 1a and 1b show the typical temperature depen-
dence of output source and sink currents, respectively,
for three fixed values of (V
For example, at V
tain (V
T
A
MAX4490
= +25°C are 2.2mA and 3.3mA, respectively, when
—
—
—
—
—
—
—
—
—
1
2
3
4
5
DD
- V
OH
MAX4491
) = 100mV and (V
PIN
—
—
—
—
—
—
DD
4
8
3
2
1
5
6
7
_______________________________________________________________________________________
= 5.0V, the load currents that main-
Detailed Description
Rail-to-Rail Output Stage
Rail-to-Rail Input Stage
MAX4492
DD
10, 12
DD
9, 13
8, 14
11
—
—
—
- 1.2V).
4
3
2
1
5
6
7
- V
SS
OL
OH
+ 1.2V), and the P-
) and (V
- V
OUTC, OUTD
Rail-to-Rail I/O Op Amps in SC70
INC+, IND+
INC-, IND-
SS
NAME
OUTA
OUTB
INA+
INB+
OUT
INA-
INB-
V
IN+
V
IN-
) = 100mV at
DD
SS
OL
- V
Low-Cost, High-Slew-Rate,
SS
Noninverting Input
Negative Supply Input. Connect to ground for single-supply operation.
Inverting Input
Amplifier Output
Positive Supply Input
Noninverting Input to Amplifier A
Inverting Input to Amplifier A
Amplifier A Output
Noninverting Input to Amplifier B
Inverting Input to Amplifier B
Amplifier B Output
Noninverting Inputs to Amplifiers C and D
Inverting Inputs to Amplifiers C and D
Amplifiers C and D Outputs
).
the load is connected to V
drive capability is (2.5 - 0.1) / 2.2 = 1.1kΩ. For the same
application, resistive-drive capability is 2.2kΩ when the
load is connected to V
The MAX4490/MAX4491/MAX4492 operate from a sin-
gle 2.7V to 5.5V supply or from dual ±1.35V to ±2.75V
supplies with typically 800µA supply current per ampli-
fier. A high power-supply rejection ratio of 100dB
allows for extended operation from a decaying battery
voltage, thereby simplifying designs for portable appli-
cations. For single-supply operation, bypass the power
supply with a 0.1µF ceramic capacitor placed close to
the V
supply to ground.
One consequence of the parallel-connected differential
input stages for rail-to-rail operation is a relatively large
input capacitance C
DD
pin. For dual-supply operation, bypass each
Applications Information
FUNCTION
Power-Supply Considerations
IN
DD
(typically 5pF). This introduces a
or V
DD
SS
Pin Description
/2. Consistent resistive-
Input Capacitance
.
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