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.
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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