U4255BM-M Datasheet, PDF (23/32 Pages) ATMEL Corporation – AM / FM RECEIVER IC

U4255BM-M
Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): V_S = 8.5 V, T_amb = 25°C.
No. Parameters
Test Conditions
Pin
Symbol Min.
Typ.
Max.
Unit
13.3 Maximum signal-to- Modulation depth =
noise ratio
80%, f_mod = 1 kHz,
11
(S/N)_AM
52
54
dB
74 dBµV at Pin 41
14 MPX Output
14.1 DC output voltage
Bit 7 = 1
11
2.15
2.25
2.4
V
14.2 Mute gain
Bit 7 = 1,
FM dev. = ± 75 kHz,
11
f_mod = 1 kHz
14.3 Output resistance
Small signal
11
-70
-50
dB
60
W
15 Search Stop Detector, INT Output
15.1 LOW saturation
voltage
21
0
0.5
V
15.2 LOW output
resistance
21
0.3
kW
15.3 HIGH saturation
voltage
21
4.5
4.75
5.0
V
15.4 HIGH output
resistance
21
1
kW
16 Deviation Sensor, FM Mode (Bit 92 = 1, Bit 93 = 0)
16.1 Offset voltage
FM dev. = ±0 kHz
31
20
150
mV
16.2 Output voltage
FM dev. = ±75 kHz,
f_mod = 1 kHz
31
1.7
2.0
2.5
V
17 Field Strength Sensor, FM Mode (Bit 92 = 1, Bit 93 = 0, Bit 89-91 = 0, Bit 80 = 0)
17.1 Offset voltage
No signal
9
0.4
0.75
1.1
V
17.2 Output voltage
Unmodulated signal
84 dBµV at Pin 1
9
2.7
3.0
3.3
V
Field Strength Sensor, AM Mode (Bit 92 = 0, Bit 93 = 1, Bit 80 = 1)
17.3 Output voltage LOW
field strength
63 dBµV at Pin 28
9
0.7
0.9
1.1
V
17.4 Output voltage HIGH 94 dBµV at Pin 28
field strength
9
2.3
2.5
2.7
V
18 Multipath Sensor, FM Mode (Bit 92 = 1, Bit 93 = 0)
18.1 Offset voltage
Unmodulated signal,
60 dBµV at Pin 1
40
20
200
mV
18.2 Output voltage
AM modulation depth
= 60%,
f_mod = 20 kHz,
40
60 dBµV at Pin 1
1.4
1.8
2.2
V
19 Adjacent Channel Sensor, FM Mode (Bit 92 = 1, Bit 93 = 0), Bit 4 = 0 (Default BW Setting)
19.1 Offset voltage
Unmodulated signal
10
100
300
mV
19.2 Output voltage
FM dev. = ± 50 kHz,
f_mod = 1 kHz
10
0.6
1.0
V
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Type*
A
A
A
D
A
D
A
D
A
A
A
A
A
A
A
A
A
A
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4519C–AUDR–07/02