Datasheet

500
450
400
350
300
250
200
150
100
50
0
OutputCurrent(pA)
-10 -8 -6
-4
-2 0 2
4
6 8 10
OutputVoltage(V)
V = 12V
S
±
OUTPUTSHUTDOWNOUTPUTVOLTAGEvsOUTPUTCURRENT
OPA564
E/ =Low(OutputShutdown)S
V
OUT
I
OUT
TestCircuit
R
F
1.6kW
1.6kW
6GW
R
1
120pF
V+
V+
V+
V+
V-
V-
V-
V-
V
OUT
External protection
diodes as needed
I
1
I
2
+IN
-IN
OPA564
SBOS372E –OCTOBER 2008– REVISED JANUARY 2011 www.ti.com
Ensuring Microcontroller Compatibility
within the optocoupler. A high logic level causes the
OPA564 to be enabled, and a low logic level shuts
Not all microcontrollers output the same logic state
the OPA564 down. In the configuration of
after power-up or reset. 8051-type microcontrollers,
Figure 38(b), with the logic signal applied on the
for example, output logic high levels while other
anode side, a high level causes the OPA564 to shut
models power up with logic low levels after reset. In
down, and a low level enables the op amp.
the configuration of Figure 38(a), the shutdown signal
is applied on the cathode side of the photodiode
Figure 42. Output Shutdown Output Impedance
Figure 43. OPA564: Output Shutdown Equivalent Circuit (with External Feedback)
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Product Folder Link(s): OPA564