Datasheet

4
®
OPA134/2134/4134
HEADROOM – TOTAL HARMONIC DISTORTION
+ NOISE vs OUTPUT AMPLITUDE
Output Amplitude (Vrms)
THD+Noise (%)
1
0.1
0.010
0.001
0.0005
0.1
1
10 20
V
S
= ±18V
R
L
= 2k
f = 1kHz
THD < 0.01%
OPA134 – 11.7Vrms
OP176 – 11.1Vrms
Baseline
OP176
OPA134
OPA134
TYPICAL PERFORMANCE CURVES (CONT)
At T
A
= +25°C, V
S
= ±15V, R
L
= 2k, unless otherwise noted.
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
Frequency (Hz)
THD+Noise (%)
0.01
0.001
0.0001
0.00001
20 100 1k 10k 20k
V
O
= 10Vrms
R
L
= 2k
V
S
= ±16
V
S
= ±17
V
S
= ±18
HARMONIC DISTORTION + NOISE vs FREQUENCY
Frequency (Hz)
Amplitude (% of Fundamentals)
0.01
0.001
0.0001
0.00001
0.000001
20 100 1k 10k 20k
2nd Harmonic
3rd Harmonic
V
O
= 1Vrms
R
L
= 600
R
L
= 2k
VOLTAGE NOISE vs SOURCE RESISTANCE
Source Resistance ()
Voltage Noise (nV/Hz)
1k
100
10
1
0.1
10 100 1k 10k 100k 1M 10M
OP176+
Resistor
OPA134+
Resistor
Resistor Noise
Only
V
n
(total) = (i
n
R
S
)
2
+ e
n
2
+ 4kTR
S
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
1
1k
100
10
Voltage Noise (nV/Hz)
Frequency (Hz)
10 100 1k 10k 100k 1M
1
Current Noise (fA/Hz)
Voltage Noise
Current Noise
INPUT-REFERRED NOISE VOLTAGE
vs NOISE BANDWIDTH
Noise Bandwidth (Hz)
Noise Voltage (µV)
100
10
1
0.1
1 10 100 1k 10k 100k
R
S
= 20
Peak-to-Peak
RMS