U4311B Datasheet, PDF (4/14 Pages) TEMIC Semiconductors – Low-current Superhet Remote Control Receiver

U4311B
TELEFUNKEN Semiconductors
Parameters
Clamping comparator
Typical common mode
input voltage range
Maximum distortion
voltage
Output voltage
Output voltage
Wake up circuit
Minimum wake up level
Internal charging resistor
Threshold voltage
Output switch current
Output switch voltage
External wake up resistor
External wake up capacitor
Hold time (± 30%)
Delay time (± 30%)
Test Conditions / Pins
Pin 2
W ^{Vsignal = 100 mV,}
R+ = R– = 50 k ,
C+ = C– = 200 nF,
f_disto = 50 Hz,
f_signal = 1 kHz
Pin 2
W ^{V2 > (V6 + V7) /2}
(10 k load to V_Ref)
Pin 5
W ^{V2 < (V6 + V7 ) /2}
(10 k load to V_Ref)
Pin 5
Pin 9
Pin 3
Pin 3
Pin 10
Pin 10
Pins 3 and 13
Pins 3 and 13
Symbol
V_cmvr
V_dmax
V_cout
V_cout
V_in
R_int
V_th
I_SW
V_SW
R_WU
C_WU
t_h
t_d
1) IC version with inverting comparator available: U4313B
2)
W Measured at Pin 9, referred to 330
3) Protected by a Z-diode, see figure 13
4)
m m W W Valid for 0.1 F ≤ C_WU ≤ 10 F and 22 k ≤ R_WU ≤ 680 k
Min.
Typ.
Max.
Unit
0.8
1.6
V
200
mV
V_Ref
1)
0
150
250
mV
40
1.5
1.6
180
250
550
5.5
22
10
 1.5 R_WU C_WU
 W C_WU 0.75 k
m dB V²⁾
kW
V
mA
V ³⁾
kW
mF
s ⁴⁾
s ⁴⁾
Application
The U4311B is well-suited to implement UHF remote
control or data transmission systems, based on a low-
current superheterodyne receiver concept. SAW-devices
may be used in the transmitter as well as in the receiver
local oscillator. The front end should be a discrete circuit
application with low current UHF-transistors like S822T
or S852T from TEMIC TELEFUNKEN microelectronic
GmbH. The frequency of the local oscillator can be deter-
* ^{mined either by coaxial resonators or SAW-devices. Due}
to large SAW-resonator tolerance an IF-bandwidth and
* ^{in a FM-system additionally the discriminator amplitude}
characteristic (figure 28) of 300 kHz or higher is
proposed. As the circuit needs only 3.0 V supply voltage
for operation the front end may be a stacked design in
order to achieve a total receiver current consumption of
approximately 1 mA. Figure 29 shows a principle
receiver concept diagram. The application notes
ANT012, ANT013, and ANT015 contain more detailed
information on complete RF links.
4 (14)
Rev. A1: 23.06.1995