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The following connections should be observed when the Ezairo 7160 SL is used in typical hearing aid applications:
Antenna and matching circuit
C
1.8nH
L
1.5pF
Direct Audio Input
Front Microphone
Rear Microphone
NOTE: − ON Semiconductor recommends to use the 9HT12−32.768KDZF−T SMD crystal from TXC corporation.
− Harmonic filter on RF pin required to pass regulatory emission tests
− For the purposes of BT−SIG certification, the following signals must be accessible or brought out to solderable test points: VBAT,
GND, and either RFIO2 & RFIO3 or DIO24 & DIO29. (Please see AND9838/D for more details)
EZAIRO 7160 SL HYBRID
Connection Diagram
TP
Battery
w 47μF
TP
VSSRF2
A1
TP
VSSRF1
B1
3nH
RF
C1
VSSA
1.5pF
D1
TP
XTAL32KN RESERVED RFGND2
TP
E1
TP
XTAL32
XTAL32KP VDCRF
F1
Telecoil
Ezairo 7160 SL Pre Suite Connection Diagram
Figure 5. Connection Diagram, Bottom View
www.onsemi.com
Optional Receiver Detection Connections
Telecoil Reed Switch
VSSRF3
VSSRF4
VBAT
DGND
NRESET
A2
A3
A4
A5
A6
VSSRF5
RFIO12
VDDO2
DIO9
DIO6
B2
B3
B4
B5
B6
JTCK
VDBL
DIO8
DIO5
C3
C4
C5
C6
Ezairo 7160 SL
JTMS
RFNRESET
DIO4
(bottom view)
D4
D5
D6
AOUT
RFIO0
RFIO1
GND_MIC
E2
E3
E4
E5
E6
RFIO2
RFGND1
VCCRF
RFIO3
F2
F3
F4
F5
F6
TP
TP
12
ARD0
Receiver
ARD1
Programming Strip
DIO21
SCL
SDA
RCVRBAT
A7
A8
A9
A10
DIO20
RCVR1N
RCVR0N
HGND
B7
B8
B9
B10
DIO22
RCVR1P
RCVR0P
DIO29
C7
C8
C9
C10
DIO7
EXTCLK
DIO23
DIO24
D7
D8
D9
D10
VMIC
Audio In
AGND
E7
E8
E9
E10
Telecoil
Front Mic
Rear Mic
VREG
F7
F8
F9
F10
Volume/Memory −
Volume/Memory +
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