Sony CXA1511M, CXA1511L Datasheet
Preamplifier for Remote Control Signal Reception
Description
The CXA1511L/M is a bipolar IC used for
preamplifiers that receive signals in infrared remote
control systems. These ICs consist of a first-stage
amplifier, limiter amplifier, band-pass filter, band
elimination filter, signal waveform detection circuit
and waveform shaping circuit.
Features
• Low power consumption (VCC = 5V, 9mW typ.)
• Low supply voltage (VCC = 5V)
• Filters (center frequency can be varied through
external resistor: fo = 30kHz to 60kHz, 40kHz typ.)
• Elimination of inductors prevents magnetic field
inductance interference.
• Optical reception diode can be coupled directly.
• Collector output (pull-up resistor, TTL and CMOS
can be connected directly)
Applications
TVs, VCRs, audio equipment
Structure
Bipolar silicon monolithic IC
Block Diagram and Pin Configuration
Absolute Maximum Ratings
• Supply voltage VCC 7V
•Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –65 to +150 °C
• Allowable power dissipation
PD 600 mW (SIP)
• Allowable power dissipation
PD 300 mW (SOP)
Operating Conditions
• Supply voltage 4.7 to 5.3 V
– 1 –
E94301A8X
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
CXA1511L/M
8 pin SIP (Plastic)
8 pin SOP (Plastic)
4
6
8
1
2
7
3
5
C1 C2GND fo N.C. VCCOUT
470, 680
0.01µ
0.01µ
V
CC = 5V
200k
(fo = 40kHz)
Hysteresis
Comparator
Delector &
Comparator
Integralor
BPF
BEF
Limiter
Amp
Head
Amp
IN
Photo
Diode
ABLC
– 2 –
CXA1511L/M
Pin Description Pin voltage depends on the DC Characteristics Measurement Circuit.
Pin
No.
Symbol
Pin
voltage
Equivalent circuit Description
1
2
IN
C1
2.8V
2.8V
Input pin.
Connect optical reception
diode to GND.
Connect a resistor and
capacitor in series to GND,
and set the frequency
response and gain of "Head
Amp".
When the resistor is large
and the capacitor small, the
gain is small.
When the capacitor is large,
sensitivity decreases in
relation to the transient
response.
3
C2
1.9V
Connect a detection capacitor
to GND.
When the capacitor is large,
sensitivity decreases in relation
to the mean value detection
and transient response.
When the capacitor is small,
fluctuation of the peak detection
and output pulse width
increases.
The capacitor in usage is
0.01µF (typ.). Set output pulse
width fluctuation and noise
elimination characteristics to be
optimum.
4
GND
GND pin.
Adopt a pattern design that will
allow external parts to be
located as closely as possible
to this pin. Ground them all at
the same point. The transport
distance and noise elimination
characteristics are greatly
influenced by the pattern design
surrounding the GND.
5
fo
1.4V
Connect a resistor to the
power supply.
Set the center frequency of
the built-in BPF.
See "External resistor at
Pin 5 vs. Center frequency
response" on Page 6.
VCC
40µA↓
VCC
47k 160k
8k
↓40µA
8k
1
2
VCC
330k
↓30µA
8k
30nA↓
3
VCC
VCC
8k
4p
5
– 3 –
CXA1511L/M
Pin
No.
Symbol
Pin
voltage
Equivalent circuit Description
6
7
8
N.C.
OUT
VCC
5.0V
(High)
0.6V
(Low)
5.0V
No connected pin.
Connect to GND.
Output pin.
Supply voltage pin.
VCC
24k
30k
14k
30k
7
DC Characteristics Measurement Circuit
(CXA1511L) (CXA1511M)
2
3
4
5
6
7
8
6
1
2
3
4
5
7
8
CXA1511L
470
0.01µ
200k
CXA1511M
0.01µ
200k
5V
0.01µ
1
5V
0.01µ
470
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