TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25°C, V
S
=
±15V,
R
L
= 2kΩ, unless otherwise noted.
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
0.01
V
O
= 10Vrms
R
L
= 2kΩ
THD+Noise (%)
THD+Noise (%)
HEADROOM – TOTAL HARMONIC DISTORTION
+ NOISE vs OUTPUT AMPLITUDE
1
V
S
= ±18V
R
L
= 2kΩ
f = 1kHz
0.1
THD < 0.01%
OPA134 – 11.7Vrms
OP176 – 11.1Vrms
0.001
V
S
= ±16
0.0001
0.010
OPA134
OP176
OPA134
V
S
= ±17
0.00001
20
100
V
S
= ±18
1k
Frequency (Hz)
10k
20k
0.001
0.0005
Baseline
0.1
1
Output Amplitude (Vrms)
10
20
HARMONIC DISTORTION + NOISE vs FREQUENCY
0.01
2nd Harmonic
3rd Harmonic
Voltage Noise (nV/√Hz)
VOLTAGE NOISE vs SOURCE RESISTANCE
1k
OP176+
Resistor
Amplitude (% of Fundamentals)
0.001
100
0.0001
R
L
=6
00
Ω
10
0.00001
R
L
=
2k
Ω
OPA134+
Resistor
1
Resistor Noise
Only
V
n
(total) =
√(i
n
R
S
)
2
+ e
n2
+ 4kTR
S
10k
100k
1M
10M
V
O
= 1Vrms
0.000001
20
100
1k
Frequency (Hz)
10k
20k
0.1
10
100
1k
Source Resistance (Ω)
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
1k
INPUT-REFERRED NOISE VOLTAGE
vs NOISE BANDWIDTH
100
R
S
= 20Ω
Voltage Noise (nV/√Hz)
Current Noise (fA/√Hz)
Noise Voltage (µV)
100
Voltage Noise
10
10
Peak-to-Peak
1
RMS
Current Noise
1
1
10
100
1k
Frequency (Hz)
10k
100k
1M
0.1
1
10
100
1k
10k
100k
Noise Bandwidth (Hz)
®
OPA134/2134/4134
4
BURR-BROWN [ BURR-BROWN CORPORATION ]
