MAX4130(1997) 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
比赛名单
MAX4130
(Rev.:1997)
(Rev.:1997)
Maxim Integrated
MAX4130 Datasheet PDF : 16 Pages
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Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply, Rail-to-Rail I/O Op Amps
Rail-to-Rail Output Stage
The minimum output voltage is within millivolts of
ground for single-supply operation where the load is
referenced to ground (VEE). Figure 3 shows the input
voltage range and output voltage swing of a MAX4131
connected as a voltage follower. With a +3V supply
and the load tied to ground, the output swings from
0.00V to 2.90V. The maximum output voltage swing
depends on the load, but will be within 150mV of a +3V
supply, even with the maximum load (500Ω to ground).
Driving a capacitive load can cause instability in most
high-speed op amps, especially those with low quies-
cent current. The MAX4130–MAX4134 have a high tol-
erance for capacitive loads. They are stable with
capacitive loads up to 160pF. Figure 4 gives the stable
operating region for capacitive loads. Figures 5 and 6
show the response with capacitive loads and the
results of adding an isolation resistor in series with the
output (Figure 7). The resistor improves the circuit’s
phase margin by isolating the load capacitor from the
op amp’s output.
VCC = 3V, RL = 10kΩ to VEE
IN
OUT
TIME (1µs/div)
Figure 3. Rail-to-Rail Input/Output Voltage Range
VCC = 5V
RL = 10kΩ
CL = 130pF
IN
500
450
400
UNSTABLE
350
OPERATING
300
REGION
250
200
150
100
50
RL to VEE
VOUT = VCC/2
0
0.1
1
STABLE
OPERATING
REGION
10
100
LOAD RESISTANCE (kΩ)
Figure 4. Capacitive-Load Stability
VCC = 5V
CL = 1000pF
RS = 39Ω
IN
OUT
OUT
TIME (200ns/div)
TIME (500ns/div)
Figure 5. MAX4131 Small-Signal Transient Response with
Capacitive Load
Figure 6. MAX4131 Transient Response to Capacitive Load
with Isolation Resistor
10 ______________________________________________________________________________________
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