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U4311B の電気的特性と機能

U4311BのメーカーはATMEL Corporationです、この部品の機能は「Low-Current Superhet Remote Control Receiver」です。


製品の詳細 ( Datasheet PDF )

部品番号 U4311B
部品説明 Low-Current Superhet Remote Control Receiver
メーカ ATMEL Corporation
ロゴ ATMEL Corporation ロゴ 




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U4311B Datasheet, U4311B PDF,ピン配置, 機能
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 pdf, ピン配列
U4311B
Electrical Characteristics
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 Symbol Min. Typ. Max. Unit
Characteristics
Supply-voltage range
Pin 15
VS 3
12 V
Quiescent supply current
Active supply current
Bandgap
Pin 15
Pin 15
Iq
Iact
1 1.3 mA
2.8 3.6 mA
Regulated voltage
Output current
Source resistance
External capacitor
Pin 13
Pin 13
Pin 13
Pin 13
VRef
2.3
2.4
2.5
V
IRef 5 mA
RRef
2.3 5
W
CRef
10
mF
Power-supply rejection
f = 50 Hz Pin 13
psrr
60
dB
ratio
IF amplifier
Input resistance
Pin 9
Rin 180 330 520 W
Input capacitance
Typical internal 3 dB
frequency
Pin 9
IF level 70 dBmV
Pins 9 and 14
Cin
f3dB
8
5 pF
12 MHz
3 dB limiting point
Pin 9
VFM3dB
30
dBmV
Recovered data voltage
FM detector output
resistance
Pin 14
Pin 14
VFMout
RFMout
50
130 230 mV
50 kW
AM rejection ratio
Maximum AM input
voltage
m = 30%
Pins 9 and 14 AMrr
Pin 9
VAMmax
25
90
dB
dBmV
AM quiescent current
Maximum AM current
Pin 8
Pin 8
IAMout
10
22
37
mA
IAMoutmax
100
mA
Operational amplifier
Gain-bandwidth product
Excess phase
Pins 1, 2 and 16
Pins 1, 2 and 16
ft
d
3 4 6.5 MHz
80 degree
Open loop gain
Output voltage range
Common-mode input
voltage
Pins 1, 2 and 16 g0
50 70
95
Pin 2
Vout
1.55
Pins 1 and 16 Vin
0.7
1.7
dB
V
V
Input offset voltage
Maximum output current
Pins 1 and 16 Vos
2.5
0
+2.5 mV
Pin 2
Iout
5 mA
Rev. A3, 28-Sep-00
3 (15)
Free Datasheet http://www.datasheet-pdf.com/


3Pages


U4311B 電子部品, 半導体
U4311B
Circuit Description
General Functions
The integrated circuit U4311B includes the following
functions: IF amplifier, FM demodulator, wake-up circuit
with monoflop, operational amplifier, non-inverting data
comparator and voltage regulator.
The 10.7-MHz IF signal from the front end passes the
integrated IF-amplifier which operates for amplitude- or
frequency-modulated signals to either a logarithmic AM
demodulator which was implemented to avoid settling-
time problems effected by use of an automatic gain
control system or a quadrature detector for FM. A data-
shaping filter * advantageously realized with the
internal high-performance operational amplifier *
reduces system bandwidth to an optimized compromise
regarding transmission distance and data recognition.
Thus, an optimal bit-error rate can be achieved without
any further active component.
The comparator connected to the output of the filter has
a level-dependent hysteresis and clamps its reference
voltage to the signals minimum and maximum peaks as
described later.
Without IF-input signal * in normal mode * only the IF
amplifier and the AM demodulator which operates as a
level-strength indicator are activated. If the level of the IF
signal increases, the entire circuitry is turned on by the
wake-up circuit. This signal is externally available at
Pin 10 and can be used to wake up a microcontroller.
After an adjustable reset time, determined by the mono-
flop time constant, the integrated circuit returns to sleep
mode. In this case, typically 1-mA supply current is re-
quired. An external resistor matched at Pin 3 to ground
blocks the wake-up circuit and enables the complete func-
tionality at lower IF levels as can be seen in figures 24
and 27, but supply current increases up to typically
2.8 mA.
Function of the Clamping Comparator
The output signal of the operational amplifier is fed to the
input of the non-inverting comparator and two peak
detectors (Q1 and Q2, figure 3). Their time constants are
distinguished by RC+ and RC. The components value
must be adapted to the transmission code. The time
constant should be large compared to the bit rate for opti-
mized noise and hum suppression. To compensate the
input transistors base-emitter-voltage differences, these
two signals are buffered by Q3 and Q4. The mean value
is used as comparator threshold, the difference of the peak
values controls the hysteresis. This clamping comparator
operates as a data regenerator.
VRef
12345678
95 9969
Q1 Q3
Op. amp.
+
Comparator
to Pin 16
Hysteresis
Comp. threshold
Q4
Q2
Figure 3. Principle function of the clamping comparator
6 (15)
Rev. A3, 28-Sep-00
Free Datasheet http://www.datasheet-pdf.com/

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部品番号部品説明メーカ
U4311B

Low-Current Superhet Remote Control Receiver

ATMEL Corporation
ATMEL Corporation
U4311B-FS

Low-Current Superhet Remote Control Receiver

ATMEL Corporation
ATMEL Corporation


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