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PDF U4311B Data sheet ( Hoja de datos )
| Número de pieza | U4311B | |
| Descripción | Low-Current Superhet Remote Control Receiver | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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U4311B
Low-Current Superhet Remote Control Receiver
Description
The U4311B is a monolithic integrated circuit in bipolar
technology for low-current UHF remote control super-
heterodyne receivers in amplitude- or frequency-
modulated mode. Typical applications are keyless car
lock-, alarm- or tele-control remote indication systems.
Especially for automotive applications, it supports a
superhet design with about 1 mA total current
consumption as required by the car manufacturers.
Features
D Usable for amplitude- and frequency-modulated
transmission systems
D Extremely low quiescent current (approximately
1 mA in standby mode due to wake-up concept)
D Wide power supply voltage range 3 to 13 V
D Sensitive IF amplifier for 10.7-MHz operating
frequency
D Logarithmic AM demodulator
D FM demodulator
D Monoflop exit to wake up a microcontroller
D High-performance operational amplifier to realize a
data recovering filter
D Non-inverting clamping comparator with amplitude-
depending hysteresis for data regeneration
Block Diagram
Wake-up out
VRef = 2.4V 13
VS
15
Bandgap
11
Internal
VRef = 2.4 V
10 3 7 6
Monoflop
RF
Level
Wake up
Non – invert.
clamping
comparator
5 Data out
10.7 MHz
9
4
IF
amplifier
Quadrature
detector
Operational
amplifier
2
8 12
log AM out
–
14 16
FM out
+
1
95 9968
10.7 MHz
Data
filter
Ordering Information
Extended Type Number
U4311B-M
U4311B-MFL
Figure 1. Block diagram
Package
DIP16
SO16L
Remarks
Rev. A3, 28-Sep-00
1 (15)
Free Datasheet http://www.datasheet-pdf.com/
1 page  
U4311B
Electrical Characteristics (continued)
VS = 5 V, Tamb = 25°C, fin = 10.7 MHz; FM part: fmod = 1 kHz, fdev = 22.5 kHz; AM part: fmod = 1 kHz, m = 100%
unless otherwise specified
Parameters
Test Conditions / Pins
Power-supply rejection
ratio
f = 50 Hz Pin 2
Clamping comparator
Typical common-mode
input voltage range
Pin 2
Maximum distortion
voltage
Output voltage
Vsignal = 100 mV,
R+ = R– = 50 kW,
C+ = C– = 200 nF,
fdisto = 50 Hz,
fsignal = 1 kHz
Pin 2
V2 > (V6 + V7) /2
(10-kW load to VRef)
Pin 5
Output voltage
V2 < (V6 + V7 ) /2
(10-kW load to VRef)
Pin 5
Wake-up circuit
Minimum wake-up level
Pin 9
Internal charging resistor
Pin 3
Threshold voltage
Pin 3
Output switch current
Pin 10
Output switch voltage
Pin 10
External wake-up resistor
Pins 3 and 13
External wake-up capacitor
Pins 3 and 13
Hold time (± 30%)
Delay time (± 30%)
Symbol
psrr
Vcmvr
Vdmax
Vcout
Vcout
Vin
Rint
Vth
ISW
VSW
RWU
CWU
th
td
Min. Typ. Max. Unit
65 85
dB
0.8 1.6 V
200 mV
VRef
V
0 150 250 mV
40
1.5
1.6
180 250 550
5.5
22
10
1.5 RWU CWU
CWU 0.75 kW
dBmV 1)
kW
V
mA
V 2)
kW
mF
s 3)
s 3)
1) Measured at Pin 9, referred to 330 W
2) Protected by a Z-diode, see figure 13
3) Valid for 0.1 mF ≤ CWU ≤ 10 mF and 22 kW ≤ RWU ≤ 680 kW
Rev. A3, 28-Sep-00
5 (15)
Free Datasheet http://www.datasheet-pdf.com/
5 Page 
U4311B
VS
R1
8.2 kW
C7
10 mF
C8
100 nF
C9
10 mF
C10
10 nF
R9
56 W
R10
300 W
IF input
R8
100 kW
C11
10 nF
16 15 14 13 12 11 10
9
Wake-up
out
C2
100 nF
C1
10 nF
R2
30 kW
Data filter
output
C3
1.5 nF
R6
100 kW
R5
100 kW
123
C4
100 nF
Wake up
R7
22 kW
R3
220 kW
C5
220 nF
45678
R12 C12
100 kW 220 nF
Comparator
output
R13
10 kW
R4
100 kW
C6
220 nF
R11
10 kW
Figure 23. AM test circuit with 2-kHz Bessel lowpass data filter
10
0
–10
–20
–30
–40
–50
–60
–70
–80
0
95 10292
S+N
N (low level)
N (high level)
20 40 60 80
IF-input level ( dmBV )
100
Figure 24. Signal-to-noise ratio AM
100
90 +25°C
80
+85°C
70
60
50 –40°C
40
30
20
10
10 25 40 55 70 85 100
95 10276
IF-input level (dBmV )
Figure 25. AM-demodulator characteristic vs. temperature
Rev. A3, 28-Sep-00
11 (15)
Free Datasheet http://www.datasheet-pdf.com/
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet U4311B.PDF ] | |
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