Texas Instruments PGA450Q1EVM, Руководство пользователя

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1 6
3 4
2
TI to supply
TR1
TRANSFORMER
XFMR RETURN
VREG
GND
OUTB
OUTA
C21
100uF,SMT,35V,20%,AL
1
1
2
2
P5
OUTPUT
C20
2000pF,0805,1kV,10%,X7R
JP3
XFRM
GND
LIM
IN
XFMR RETURN
C19
0
.1
uF
,06
03
,5
0V
,10
%,
X
7
R
R9
3.3k,1210,1/4W,
5%,+-200ppm/C
1
1
2
2
DO NOT POPULATE
P6
JP4
JP5
SH5
SH4
SH3
Socket for Programming OTP
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6 SLDU007C – March 2012 – Revised November 2015
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PGA450Q1EVM User’s Guide
5 Socket for Programming OTP
The PGA450Q1EVM runs from the PGA450-Q1 device that is soldered to the board. In addition, the EVM
provides a footprint for a socket to enable programming the OTP in devices that are for customer-board
use. The socket is not populated by default on the EVM. The part number for the recommended socket is
OTS-28-0.65-01.
The GUI then can be used to select the target PGA450-Q1 device when programming OTP (the two
options are the soldered device, or the device in the socket). More details of how to do this are described
in the
OTP section.
6 Transformer and Transducer
A matched transformer-transducer pair is included on the PGA450Q1EVM.
NOTE: C20 is a temperature compensation capacitor for the XDCR. Match C20 to the selected XDCR. If XDCR is
Murata MA58MF14-7N, 2000-pF capacitance is installed, and 1500-pF capacitance is provided as an
alternative. If XDCR is Murata MA58AF14-0N. 1500-pF capacitance is installed. Alternative specifications
include: 1500 pF, 0805, 250 V, 20%, NPO
Figure 2. Transformer and Connector for the Transducer
A matched transformer-transducer pair is included on the PGA450Q1EVM. Table 4 lists closed-top
transducers and tunable push-pull transformers from various manufacturer numbers that can be matched
with a tuning capacitor to create a sensor pair. By default, the transducer and transformer provided with
the EVM are the Murata MA58MF14-7N and Mitsumi K5-R4, respectively.
Table 4. Transducer and Transformer Manufacturer
Part Numbers
Manufacturer Part Number
Transducer (at P5 or P6)
Murata MA58MF14-7N
Murata MA58AF14-0N
Transformer (TR1)
Mitsumi K5-R4
Toko N1342DEA-0008BQE=P3
Murata has provided the following note with regard to the availability and ability to order their ultrasonic
sensors:
• For small quantity sample requests, inquire online at the Murata website: https://www.murata.com/en-
us/contactform .
• For consumer-grade applications exposed to controlled environments, consider open-structure
sensors, such as the Murata MA40H1S-R. Distributors will typically have these sensors readily
available for purchase online.
• For automotive-grade sensors (such as the transducers listed in Table 4 for applications exposed to