SI4712-B30 Datasheet, PDF (13/42 Pages) Silicon Laboratories – FM RADIO TRANSMITTER WITH RECEIVE POWER SCAN

Si4712/13-B30
Table 9. FM Transmitter Characteristics¹ (Continued)
(Test conditions: V_RF = 118 dBµV, stereo, f = 68.25 kHz, fpilot = 6.75 kHz, REFCLK = 32.768 kHz, 75 µs pre-emphasis,
unless otherwise specified.
Production test conditions: V_DD = 3.3 V, V_IO = 3.3 V, T_A = 25 °C, F_RF = 98 MHz.
Characterization test conditions: V_DD = 2.7 to 5.5 V, V_IO = 1.5 to 3.6 V, T_A = –20 to 85 °C, F_RF = 76–108 MHz.
All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions.
Typical values apply at V_DD = 3.3 V and 25 °C unless otherwise stated.
Parameters are tested in production unless otherwise specified.)
Parameter
Audio Stereo Separation²
Symbol
Test Condition
left channel only
Min Typ Max Unit
30
35
—
dB
Sub Carrier Rejection Ratio
Powerup Settling Time²
Input Signal Level²
Frequency Flatness²
High Pass Corner Frequency²
Low Pass Corner Frequency²
SCR
40
50
—
dB
—
—
110
ms
V_AI
—
Mono, ±1.5 dB,
30
f = 75 kHz, 0, 50, 75 µs
pre-emphasis, limiter off
— 0.636 V_PK
— 15 k
Hz
Mono, –3 dB, f = 75 kHz, 5
—
30
Hz
0, 50, 75 µs pre-emphasis,
limiter off
Mono, –3 dB, f = 75 kHz, 15 k — 16 k
Hz
0, 50, 75 µs pre-emphasis,
limiter off
Audio Imbalance
Pilot Modulation Rate Accuracy²
Audio Modulation Rate Accuracy²
Input Resistance²
Input Capacitance²
Mono
–1
—
1
dB
f = 68.25 kHz,
–10 —
10
%
fpilot = 6.75 kHz, Stereo
f = 68.25 kHz,
–10 —
10
%
fpilot = 6.75 kHz, Stereo
LIATTEN[1:0] = 11
50
60
—
k
—
10
—
pF
Received Noise Level Accuracy
(Si4712/13 Only)²
60 dBµV input, T_A = 25 ºC —
54
—
dBuV
Notes:
1. FM transmitter performance specifications are subject to adherence to Silicon Laboratories guidelines in “AN383:
Universal Antenna Selection and Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for
qualified customers. Tested with test schematic (L = 120 nH, Q > 30) shown in Figure 9 on page 15.
2. Guaranteed by characterization.
3. No measurable fRF/V_DD at V_DD of 500 mVpk-pk at 100 Hz to 10 kHz.
Rev. 1.1
13