a3848eeq Allegro MicroSystems, Inc., a3848eeq Datasheet - Page 2

• Manufacturer Part Number: a3848eeq
• Description: Dual-conversion Am Receiver
• Manufacturer: Allegro MicroSystems, Inc.

ELECTRICAL CHARACTERISTICS at T
f
if2
3848
DUAL-CONVERSION AM RECEIVER
Characteristic
Supply Current
Sensitivity
Usable Sensitivity
Recovered Audio
Total Harmonic Dist.
Oscillator Output
Stop Output Voltage
Stop Sensitivity
Stop Bandwidth
Wide-Band AGC
Field-Strength
Indicator
Output Voltage
(unmodulated,
AGC Reset Low)
Field-Strength
Indicator
Output Voltage
(unmodulated,
AGC Reset High)
Overload
-3dB Limiting
IF Output Voltage
FM Recovered Audio
Signal to Noise Ratio
AGC Figure of Merit
= 450 kHz, V
in
= 10 mV; f
Symbol
BW
S+N/N
FOM
THD
V
V
V
V
V
V
V
V
I
V
V
V
V
V
AGC
CC
STP
FSI
FSI
out
out
out
stp
in
in
o
STP
in
in
m
= 1 kHz , Mod = 30% (except as noted).
Test Conditions
I
I
V
S + N/N = 20 dB
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
First Mixer (Note 2)
Mod = 3 kHz peak deviation
V
V
V
V
Ref. at V
2
2
Mod = 90%
out
8
8
12
8
in
in
in
in
in
in
in
in
in
in
in
in
in
out
in
7
in
in
, V
, V
17
, V
, Mod = 0%
, Mod = 3 kHz peak deviation
= 2.5 V, = 0%
= 1 mV
= 10 mV
= 0
= 11 mV, Mod = 0%
= 26 mV, Mod = 0%
= 0
= 30 V, Mod = 0%
= 100 V, Mod = 0%
= 1 mV, Mod = 0%
= 10 mV, Mod = 0%
= 0
= 30 V, Mod = 0%
= 100 V, Mod 0%
= 1 mV, Mod = 0%
= 10 mV, Mod = 0%
= 1 mV
= 2.5 V, Mod = 0%
in
in
= 50 mV
= 3% THD, Mod = 90%
in
= 0
= 0, V
= 0
in
= 10 mV, V
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
W
Copyright © 1993, Allegro MicroSystems, Inc.
27
A
= 0 (Muted)
= +25 C, V
in
for V
out
= -10 dB
CC
= 10 V, f
0.25
Min
165
350
200
4.7
3.7
1.1
3.1
0.9
2.5
5.0
5.0
1.8
1.3
2.3
7.0
o
—
—
—
—
—
80
—
30
—
—
—
60
—
—
50
53
= 1 MHz, f
0.10
0.60
Typ
215
120
100
450
250
380
0.4
1.0
6.0
5.0
6.5
6.7
5.0
0.1
1.6
2.5
3.7
1.1
1.6
2.9
3.7
50
14
45
—
—
12
53
56
10
Limits
if1
Max
0.16
1.05
265
320
6.0
2.0
8.0
8.0
1.0
0.4
2.2
3.2
4.4
0.5
1.5
2.0
3.5
4.0
65
10
21
60
14
—
—
—
—
—
—
—
—
—
Continued next page...
= 10.7 MHz,
Units
kHz
mA
mA
mV
mV
mV
mV
mV
mV
dB
dB
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V