OPA376 Datasheet, PDF (22/42 Pages) Burr-Brown (TI) – Precision, Low Noise, Low Quiescent Current, Operational Amplifier

OPA376, OPA2376, OPA4376
SBOS406G – JUNE 2007 – REVISED DECEMBER 2015
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Layout Guidelines (continued)
10.1.1 Photosensitivity
Although the OPA2376YZD package has a protective backside coating that reduces the amount of light exposure
on the die, unless fully shielded, ambient light can reach the active region of the device. Input bias current for the
package is specified in the absence of light. Depending on the amount of light exposure in a given application, an
increase in bias current, and possible increases in offset voltage, should be expected. Fluorescent lighting may
introduce noise or hum because of the time-varying light output. Best layout practices include end-product
packaging that provides shielding from possible light sources during operation.
10.2 Layout Example
VIN
RG
+
RF
VOUT
(Schematic Representation)
Run the input traces
as far away from
the supply lines
as possible
Place components
close to device and to
each other to reduce
parasitic errors
RG
GND
VIN
RF
N/C
±IN
+IN
V±
N/C
V+
OUTPUT
N/C
VS+
GND
Use low-ESR, ceramic
bypass capacitor
Use low-ESR,
ceramic bypass
capacitor
GND
VS±
VOUT
Figure 32. Layout Example
Ground (GND) plane on another layer
22
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