Datasheet

Detailed Description
Rail-to-Rail Output Stage
The MAX4400–MAX4403 can drive a 2kΩ load and still
typically swing within 55mV of the supply rails. Figure 1
shows the output voltage swing of the MAX4400 config-
ured with A
V
= +10V/V.
Driving Capacitive Loads
Driving a capacitive load can cause instability in many op
amps, especially those with low quiescent current. The
MAX4400–MAX4403 are unity-gain stable for a range
of capacitive loads to above 400pF. Figure 2 shows the
response of the MAX4400 with an excessive capacitive
load. Adding a series resistor between the output and the
load capacitor (Figure 3) improves the circuit’s response
by isolating the load capacitance from the op amp’s output.
Figure 1. Rail-to-Rail Output Operation
PIN
NAME FUNCTION
MAX4400 MAX4401 MAX4402 MAX4403
1 1 — — IN+ Noninverting Amplier Input
— — 3 3 INA+ Noninverting Amplier Input A
— — 5 5 INB+ Noninverting Amplier Input B
— — — 10 INC+ Noninverting Amplier Input C
— — — 12 IND+ Noninverting Amplier Input D
2 2 4 11
V
SS
Negative Supply. Connect to ground for single- supply
operation.
3 3 — — IN- Inverting Amplier Input
— — 2 2 INA- Inverting Amplier Input A
— — 6 6 INB- Inverting Amplier Input B
— — — 9 INC- Inverting Amplier Input C
— — — 13 IND- Inverting Amplier Input D
4 4 — — OUT Amplier Output
— — 1 1 OUTA Amplier Output A
— — 7 7 OUTB Amplier Output B
— — — 8 OUTC Amplier Output C
— — — 14 OUTD Amplier Output D
5 6 8 4
V
DD
Positive Supply
— 5 — — SHDN
Active-Low Shutdown Input. Connect to
V
DD
for normal
operation. Do not leave unconnected.
1V/div
100µs/div
www.maximintegrated.com
Maxim Integrated │ 7
MAX4400–MAX4403 Single/Dual/Quad, Low-Cost, Single-Supply,
Rail-to-Rail Op Amps with Shutdown
Pin Description