Datasheet MAX4480, MAX4481, MAX4482, MAX4483 (Analog Devices) - 7

MAX4480–MAX4483 Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with Shutdown
Pin Description PIN NAME FUNCTION MAX4480 MAX4481 MAX4482 MAX4483
1 1 — — IN+ Noninverting Amplifier Input — — 3 3 INA+ Noninverting Amplifier Input A — — 5 5 INB+ Noninverting Amplifier Input B — — — 10 INC+ Noninverting Amplifier Input C — — — 12 IND+ Noninverting Amplifier Input D 2 2 4 11 V Negative Supply. Connect to ground for single-supply SS operation. Use a 0.01μF bypass capacitor to GND. 3 3 — — IN- Inverting Amplifier Input — — 2 2 INA- Inverting Amplifier Input A — — 6 6 INB- Inverting Amplifier Input B — — — 9 INC- Inverting Amplifier Input C — — — 13 IND- Inverting Amplifier Input D 4 4 — — OUT Amplifier Output — — 1 1 OUTA Amplifier Output A — — 7 7 OUTB Amplifier Output B — — — 8 OUTC Amplifier Output C — — — 14 OUTD Amplifier Output D 5 6 8 4 VDD Positive Supply. Use a 0.01μF bypass capacitor to GND. — 5 — — SHDN Active-Low Shutdown Input. Connect to VDD for normal operation. Do not leave floating.
Detailed Description Rail-to-Rail Output Stage
The MAX4480–MAX4483 can drive a 5kΩ load and still typically swing within 80mV of the supply rails. Figure 1 shows the MAX4480 output voltage swing configured with AV = +10V/V.
Driving Capacitive Loads
1V/div Driving a capacitive load can cause instability in many op amps, especially those with low quiescent current. The MAX4480–MAX4483 are unity-gain stable for a range of capacitive loads to above 400pF. Figure 2 shows the MAX4480 response with an excessive capacitive load. 100µs/div 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 www.maximintegrated.com Maxim Integrated │ 7