TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, and V
S
=
±15V,
unless otherwise noted.
INPUT VOLTAGE NOISE SPECTRAL DENSITY
1k
100
TOTAL INPUT VOLTAGE NOISE vs BANDWIDTH
p-p
Voltage Noise (nV/
√
Hz)
Input Voltage Noise (µV)
10
100
Noise Bandwidth:
0.1Hz to indicated
frequency.
1
10
0.1
RMS
1
1
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
0.01
1
10
100
1k
10k
100k
1M
10M
Bandwidth (Hz)
VOLTAGE NOISE vs SOURCE RESISTANCE
1k
–
OPEN-LOOP GAIN vs FREQUENCY
140
120
Voltage Gain (dB)
Voltage Noise (nV/
√
Hz)
+
100
R
S
100
80
60
40
20
OPA627
OPA637
OPA627 + Resistor
10
Comparison with
OPA27 Bipolar Op
Amp + Resistor
Spot Noise
at 10kHz
1M
10M
100M
Resistor Noise Only
1
100
1k
10k
100k
Source Resistance (
Ω
)
0
–20
1
10
100
1k
10k
100k
1M
10M
100M
Frequency (Hz)
OPA627 GAIN/PHASE vs FREQUENCY
30
–90
OPA637 GAIN/PHASE vs FREQUENCY
30
–90
Phase (Degrees)
10
Gain
0
75° Phase
Margin
Phase
–150
Phase
10
Gain
–150
–180
0
–180
–10
1
10
Frequency (MHz)
–210
100
–10
1
10
Frequency (MHz)
100
–210
®
OPA627, 637
4
Phase (Degrees)
20
Gain (dB)
–120
20
Gain (dB)
–120
BURR-BROWN [ BURR-BROWN CORPORATION ]
