Datasheet

OPA234, OPA2234, OPA4234
6
SBOS055B
www.ti.com
INPUT NOISE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
1
1k
100
10
Voltage Noise (nV/√Hz)
Current Noise (fA/√Hz)
Frequency (Hz)
10 100 1k 10k 100k
Current Noise
Voltage Noise
TYPICAL CHARACTERISTIC CURVES
At T
A
= +25°C and R
L
= 10kΩ, unless otherwise noted.
INPUT BIAS CURRENT
vs INPUT COMMON-MODE VOLTAGE
Common-Mode Voltage (V)
Input Bias Current (nA)
–17
–16
–15
–14
–13
–12
–11
–10
–15 –10 –50 51015
V
S
= +5V
V
S
= +2.7V
V
S
= ±15V
INPUT BIAS AND INPUT OFFSET CURRENT
vs TEMPERATURE
Ambient Temperature (°C)
Input Bias, Input Offset Current (nA)
–20
–15
–10
–5
0
+5
–75 –50 –25 0 25 50 75 100 125
V
S
= +2.7V, +5V
I
OS
V
S
= ±15V
I
B
OPEN-LOOP GAIN/PHASE vs FREQUENCY
0.1
140
120
100
80
60
40
20
0
–20
0
–30
–60
–90
–120
–150
–180
Voltage Gain (dB)
Phase (°)
Frequency (Hz)
1 10 100 1k 10k 100k 1M
C
L
= 100pF
G
φ
V
O
= 0.25V
V
S
= +5V
±15V
V
O
=
V
S
2
V
S
= +2.7V
CMR
+PSR
POWER-SUPPLY AND COMMON-MODE REJECTION
vs FREQUENCY
Frequency (Hz)
PSR, CMR (dB)
120
110
100
90
80
70
60
50
40
30
20
10
0
10 100 1k 10k 100k 1M
–PSR
V
S
= +2.7V, +5V
or ±15V
V
S
= +2.7V or +5V
V
S
= ±15V
CHANNEL SEPARATION vs FREQUENCY
Frequency (Hz)
Channel Separation (dB)
160
140
120
100
80
10 100 1k 10k 100k
Dual and quad devices.
G = 1, all channels.
Quad measured channel
A to D or B to C—other
combinations yield improved
rejection.
R
L
= 10kΩ