U4255BM-MFN Atmel, U4255BM-MFN Datasheet - Page 22

• Manufacturer Part Number: U4255BM-MFN
• Description: IC RCVR AM/FM FRONT-END 44-SSOP
• Manufacturer: Atmel

Specifications of U4255BM-MFN

• Frequency: 70MHz ~ 160MHz
• Modulation Or Protocol: AM, FM
• Applications: AM/FM Radio Receiver
• Current - Receiving: 50mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 7.5 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -

Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): V
22
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
9.10
9.11
9.12
10.1
10.2
10.3
10.4
10.5
10.6
10.7
11.1
11.2
11.3
11.4
12.1
12.2
12.3
13.1
13.2
No.
9.8
9.9
10
11
12
13
Parameters
Maximum differential
output voltage FM
Input resistance
LO input voltage
LO input resistance
LO input bias voltage
2
Input resistance
Maximum voltage
gain
Gain control range
Maximum voltage
gain
DC output voltage
AC output voltage
Output impedance
FM Demodulator Integrated Bandfilter, FM Mode (Bit 92 = 1, Bit 93 = 0), BW Setting 2
AC output voltage
Stereo roll-off
Total harmonic
distortion
Maximum signal-to-
noise ratio
Soft Mute, FM Mode (Bit 92 = 1, Bit 93 = 0, Bit 80 = 0)
Mute gain
Mute gain
Soft mute threshold
AM Demodulator, AM Mode (Bit 92 = 0, Bit 93 = 1)
AC output voltage
Total harmonic
distortion
U4255BM-M
nd
IF Amplifier (Bit 55 = 0)
Test Conditions
Pin 27 AC-grounded
AM/WB mode
(Bit 93 = 1)
AM/WB mode
(Bit 93 = 1)
FM mode (Bit 92 = 1,
Bit 93 = 0, Bit 54 = 0)
Unmodulated signal,
82 dBµV at Pin 1
(IF AGC active)
Small signal
Deviation = ± 75 kHz,
f
Deviation = ± 75 kHz,
f
(reference: 1 kHz)
Deviation = ± 75 kHz,
f
Dev. = ± 22.5 kHz,
f
de-emphase, signal
input at 450 kHz
Bit 67 = 0,
V (Pin 34) = 2 V
Bit 67 = 1,
V (Pin 34) = 2 V
Bits 89-91 = 0,
Bits 68-70 = 1
Modulation depth =
80%, f
Modulation depth =
80%, f
V(Pin 35) = const.
mo
mod
mod
mod
d = 1 kHz
= 38 kHz
= 1 kHz
= 1 kHz, 50 µs
mod
mod
= 1 kHz
= 1 kHz,
S
= 8.5 V, T
23, 24
28, 20
23, 24
Pin
26
22
22
22
28
20
20
20
20
11
11
11
11
11
11
11
11
amb
1
= 25°C.
Symbol
(S/N)
THD
THD
FM
AM
FM
Min.
270
145
420
-2.3
350
2.8
3.1
-31
-26
80
44
62
50
1
Typ.
-2.0
330
175
480
400
3.0
3.4
0.4
-28
-24
0.6
47
44
37
70
65
53
1
3
nd
IF Filter = 120 kHz
Max.
-1.7
400
500
200
540
450
-26
-22
3.2
3.7
0.7
50
56
2
mVrms
mVrms
mVrms
mVpp
dBµV
Unit
Vpp
k
k
dB
dB
dB
dB
dB
dB
dB
%
%
V
V
4519A–AUDR–03/02
Type*
D
D
D
D
D
D
D
D
A
A
A
A
A
A
A
A
A
A
B
A
A