U4270B Datasheet, PDF (3/7 Pages) TEMIC Semiconductors – FM IF limiter amplifier and detector

TELEFUNKEN Semiconductors
U 4270 B
Absolute Maximum Ratings
Reference point Pin 1, unless otherwise specified
Parameters
Supply voltage
Junction temperature
Storage temperature range
Ambient temperature range
Pin 14
Symbol
Value
Unit
V_S
18
V
T_j
150
°C
T_stg
– 40 to + 150
°C
T_amb
– 25 to + 85
°C
Thermal Resistance
Junction ambient
Parameters
Symbol
R_thJA
Maximum
100
Unit
K/W
Electrical Characteristics
" V_S = 8.5 V, reference point Pin 1, f_i = 10.7 MHz, adjusted at I₇ = 0, V_i = 10 mV, FM-deviation 75 kHz, f_mod = 1 kHz,
Q₀ = 20, T_amb = 25 _C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol Min
Typ
Max
Unit
Supply voltage
Supply current
Field strength output
Pin 14
V_S
7.5
Pin 14
I_S
19
Pin 11
15
V
23
mA
Output voltage
V_i = 200 mV
V_i = 50 mV
V_i = 1 mV
V_i = 0 mV
V_OUT
4.4
4.2
2.5
0.01
4.9
V
4.6
2.8
0.42
Audio output signal
Pin 4
Output voltage
Distortion
(S+N)/N ratio
" deviation 75 kHz
V_AF
290
THD
0.48
S+N/N
77
330
mV
0.88
%
81
dB
AM-rejection
Mute depth
R ^{m = 30 %}
V₂ = 0 V, R₃ =
V₂ = 0 V, R₃ = 0
62
66
dB
a_mute
6.7
7
9
dB
34
36
39
Maximum sink current
I₄
0.9
1.1
mA
Stop signal output
Pin 6
Input frequency window
W R_7-8 = 22 k
f_win
" 23
" 28
kHz
Output voltage
HIGH
V₆
7
V
LOW
Input voltage threshold
I₆ < 0.5 mA
V₆ = 0.5 V, Pin 5 open
V₆ = 0.5 V, V₅ = V₈
0.1
0.2
V_i
25
45
mV
0.6
1.3
mV
Rev. A1: 07.10.1994
Preliminary Information
3