OP200_04 Datasheet, PDF (8/12 Pages) Analog Devices – Dual Low Offset, Low Power Operational Amplifier

OP200
50
45
T_A = 25؇C
V_S = ؎15V
40
35
30
25
20
FALLING
RISING
15
10
5
0
0 0.5 1.0 1.5 1.0 1.5 3.0
CAPACITIVE LOAD – nF
TPC 19. Overshoot vs.
Capacitive Load
29
T_A = 25؇C
28
V_S = ؎15V
27
26
SINKING
25
24
SOURCING
23
22
0
1
2
3
4
5
TIME – Minutes
TPC 20. Short-Circuit
Current vs. Time
150
140
130
120
110
100
90
10
100
1k
10k
FREQUENCY – Hz
100k
TPC 21. Channel Separation
vs. Frequency
TPC 22. Large Signal
Transient Response
TPC 23. Small Signal
Transient Response
TPC 24. Small Signal Transient
Response C_LOAD = 1 nF
APPLICATIONS INFORMATION
The OP200 is inherently stable at all gains and is capable of
driving large capacitive loads without oscillating. Nonetheless,
good supply decoupling is highly recommended. Proper supply
decoupling reduces problems caused by supply line noise and
improves the capacitive load driving capability of the OP200.
APPLICATIONS
Dual Low-Power Instrumentation Amplifier
A dual instrumentation amplifier that consumes less than 33 mW
of power per channel is shown in Figure 4. The linearity of the
instrumentation amplifier exceeds 16 bits in gains of 5 to 200
and is better than 14 bits in gains from 200 to 1000. CMRR is
above 115 dB (gain = 1000). Offset voltage drift is typically
0.2 µV/°C over the military temperature range, which is compa-
rable to the best monolithic instrumentation amplifiers. The
bandwidth of the low power instrumentation amplifier is a func-
tion of gain and is shown below:
Gain
5
10
100
1000
Bandwidth
150 kHz
67 kHz
7.5 kHz
500 Hz
+15V
3
8
V_IN
5
1/2
1
OP200AZ
V_OUT
1/2
7
OP200AZ
2
4
6
–15V
V_REF
20k⍀
5k⍀
5k⍀
R_G
20k⍀
V_OUT =
5
+
40000
R_G
V_IN + V_REF
Figure 4. Dual Low Power Instrumentation Amplifier
The output signal is specified with respect to the reference
input, which is normally connected to analog ground. The
reference input can be used to offset the output from –10 V
to +10 V if required.
–8–
REV. B