OPA376_15 Datasheet, PDF (12/31 Pages) Texas Instruments – Low-Noise, Low Quiescent Current, Precision Operational Amplifier e-trim Series

OPA376
OPA2376
OPA4376
SBOS406F – JUNE 2007 – REVISED MARCH 2013
OPA2376 WCSP PACKAGE
The OPA2376YZD is a lead- (PB-) free, die-level,
wafer chip-scale package (WCSP). Unlike devices
that are in plastic packages, these devices have no
molding compound, lead frame, wire bonds, or leads.
Using standard surface-mount assembly procedures,
the WCSP can be mounted to a PCB without
additional underfill. Figure 27 and Figure 28 detail the
pinout and package marking. See the NanoStar™
and NanoFree™ 300μm Solder Bump WCSP
Application Note (SBVA017) for more detailed
information on package characteristics and PCB
design.
OPA2376YZD
Top View
(bump side down)
Not to Scale
+IN B D2
-IN B C2
OUT B B2
V+ A2
D1 V-
C1 +IN A
B1 ^{-IN A}
A1 OUT A
WCSP-8
Figure 27. Pin Description
OPA2376YZD
WCSP-8 Enlarged Image
Top View
(bump side down)
Actual Size:
Exact Size:
1.150mm x 2.188mm
Package Marking Code:
YMD = year/month/day
CGL = indicates OPA2376YZD
S = for engineering purposes only
Figure 28. Top View Package Marking
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
www.ti.com
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.
DRIVING AN ANALOG-TO-DIGITAL
CONVERTER
The low noise and wide gain bandwidth of the
OPA376 family make it an ideal driver for ADCs.
Figure 29 illustrates the OPA376 driving an
ADS8327, 16-bit, 250kSPS converter. The amplifier is
connected as a unity-gain, noninverting buffer.
+5V
C₁
0.1mF
OPA376
(1)
R₁
100W
(1)
C₃
1.2nF
V_IN
+5V
+IN _ADS8327
Low Power
-IN
16-Bit
500kSPS
REF IN
+5V
REF5040
4.096V
C4
100nF
NOTE: (1) Suggested value; may require adjustment based on
specific application.
Figure 29. Driving an ADS8327
PHANTOM-POWERED MICROPHONE
The circuit shown in Figure 30 depicts how a remote
microphone amplifier can be powered by a phantom
source on the output side of the signal cable. The
cable serves double duty, carrying both the
differential output signal from and dc power to the
microphone amplifier stage.
An OPA2376 serves as a single-ended input to a
differential output amplifier with a 6dB gain. Common-
mode bias for the two op amps is provided by the dc
voltage developed across the electret microphone
element. A 48V phantom supply is reduced to 5.1V
by the series 6.8kΩ resistors on the output side of the
cable, and the 4.7kΩ and zener diode on the input
side of the cable. AC coupling blocks the different dc
voltage levels from each other on each end of the
cable.
12
Submit Documentation Feedback
Copyright © 2007–2013, Texas Instruments Incorporated
Product Folder Links: OPA376 OPA2376 OPA4376