SI477X-EVB Datasheet, PDF (27/62 Pages) Silicon Laboratories – Complete antenna-to-audio evaluation system

Si477x-EVB
Table 1. EVB Feature Descriptions
Reference
Description
1
J1
FM antenna connector/test conductor.
2
JP1
AM antenna connector
3
J33
AM test connector
4
Tuner pin/net connection points.
5
J48
Tuner pin/net connection points.
6
J56
9 V input to LDOs. Maximum 11 V.
7
J1
VIO 1/2 inputs. Source with bench power supply if on-board LDOs are not used.
8
J2
VA/VD inputs. Source with bench power supply if on-board LDOs are not used.
9
R72
VIO1 LDO adjust. (1.2–3.6 V, nominal 3.3 V)
10
J57
Selects tuner VIO1 source from LDO or TERMinal.
11
R74
VIO2 LDO adjust. (1.7–3.6 V, nominal 3.3 V)
12
J60
Selects tuner VIO2 source from LDO or TERMinal.
13
J59
Selects tuner VA source from fixed 5 V LDO/USB or TERMinal.
14
J58
Selects tuner VD source from LDO or TERMinal.
15
R73
VD LDO adjust. (2.7–3.6 V, nominal 3.3 V)
16
SW1
Selects USB or 9 V input to LDO. Note that in USB position PC 5 V sources VA directly which
could result in decreased performance. Center position is off.
17
J13
L/R_LINE_OUT. L/R lineout (direct from tuner). (Rev 3 and later)
Buffered/110 kHz lowpass filtered L-ch analog output when in MPX mode. (Rev 2)
18
J14
HEADPHONE_OUT. Buffered headphone out. (Rev 3 and later)
Buffered, 30 kHz lowpass filtered L, R channel outputs when in L/R audio mode. (Rev 2)
19
D3-D6
LEDs.
20
PB1
MCU Reset.
21
J15
USB connector.
22
J9-J12
Current measurement jumpers.
Rev. 0.4
27