AN738

6

Rev. 0.2

2.2. Band Selection

Refer to Figure 1 for the band selection circuits. Selecting a band determines the resistance value from the band

select pin to GND.

To select a specific band, you need to ensure two things:

1. Total value of resistance from the BAND to GND is equal to the value specified in Table 2.

2. Total resistance from TUNE1 to GND is 500 k

 in 1% tolerance.

The following sections describe some commonly used bands and their respective selection circuits.

2.2.1. Typical 12-band application

Table 4 and Figure 1 illustrate the band and resistor value details for a typical 12-band application for Si4836-A.

.

Table 4. Typical 12-Band Selection

Band

Number

Band

Name

Band Frequency Range

De-emphasis (FM)

Channel Space

(AM)

Stereo LED on

Conditions (Only for

Si4836-A)

Total R to

GND (K

,

1%)

Band3

FM3

87–108 MHz

75 µs

Separation = 6 dB,

RSSI = 20

67

Band17

FM17

64–108 MHz

50 µs

Separation = 6 dB,

RSSI = 20

207

Band19

AM1

520–1710 kHz

10 k

227

Band20

AM2

522–1620 kHz

9 k

237

Band25

SW2

SW Wide

Band

SW Narrow Band

287

3.2–7.6 MHz

3.20–3.40 MHz

Band26

SW3

3.2–10.0 MHz

3.90–4.00 MHz

297

Band32

SW9

5.9–18.0 MHz

9.2–10 MHz

357

Band33

SW10 7.0–16.0 MHz 11.45–12.25 MHz

367

Band34

SW11 7.0–23.0 MHz

11.6–12.2 MHz

377

Band36

SW13 9.0–22.0 MHz 13.57–13.87 MHz

397

Band37

SW14 9.5–18.0 MHz

15–15.9 MHz

407

Band39

SW16

10.0–

22.0 MHz

17.48–17.9 MHz

427