|
|
Part: UPC2800AGR
Category:
Optoelectronics
-> Drivers/Controllers
-> Infrared/Remote Control
Description: Preamplifier For Infrared Remote Control
Company: NEC Electronics Inc.
Datasheet: Download UPC2800AGR datasheet File size : 7 kB
Request For quote: Find where to buy UPC2800AGR
Datasheet text preview:
DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUITS
µ PC2800A
PREAMPLIFIER FOR INFRARED REMOTE CONTROL
DESCRIPTION
T h e µPC2800A is a receiver preamplifier for infrared remote control systems. It can be directly connected t o a PIN photodiode and integrates a high-gain first-stage amplifier, limiter, bandpass filter, detection circuit, a n d waveform shaping circuit to provide a receiver preamplifier on a single chip.
FEATURES
· H i g h reliability due to high-frequency lighting fluorescent lamp I n t e r n a l trap circuit · I n t e r n a l bandpass filter C e n t r a l frequency variable by external resistor: fO = 30 to 80 kHz F e w variation of central frequency thanks to fO trimming · L o w external components I n t e r n a l output pull-up resistor and power supply filter resistor O n l y low external capacitance required · A B L C (Automatic Bias Level Control) circuit C o n t r o l s fluctuation of bias level cause by disturbance from external light · O p e n - c o l l e c t o r output O p e n - c o l l e c t o r output (active low) with pull-up resistor (33 k TYP.)
O R D E R I N G INFORMATION
P a r t Number Package 8 - p i n plastic SOP (225 mil)
µPC2800AGR
The information in this document is subject to change without notice. Document No. S12974EJ6V0DS00 (6th edition) Date Published October 1998 N CP(K) Printed in Japan
T h e mark
shows major revised points.
©
1992
µPC2800A
B L O C K DIAGRAM
+ R2 4 3 CS VCC
fO
VCC2 RS 47
1
VCC1
IN+ 8
First stage amplifier
Limiter
BPF + TRAP
Detection circuit
RL 33 k Waveform shaping circuit OUT 2 Output
ABLC PIN photodiode 7 R1 C2 C1 IN
GND 5
CD 6
P I N CONFIGURATION (Top View)
8 - p i n plastic SOP (225 mil) · µPC2800AGR
VCC1 OUT VCC2 fO
1 2 3 4
8 7 6 5
IN
+
IN CD GND
P i n No. 1 2 3 4 5 6 7 8
Symbol V CC1 OUT V CC2 fO GND CD IN IN+
P i n Name P o w e r input pin O u t p u t pin P o w e r output pin B P F frequency setting pin G r o u n d pin D e t e c t i o n capacitor connection pin F i r s t - s t a g e amplifier gain setting pin S i g n a l input pin
2
µPC2800A
1 . PIN FUNCTION
Pin No. 1 Symbol V CC1 P i n Name P o w e r input pin I n t e r n a l Equivalent Circuit Function S u p p l y a voltage of 5 V ± 10% to this p i n . If the IC malfunctions due to power n o i s e , connect a bypass capacitor. VCC1 A n open-collector output pin (active l o w ) with a pull-up resistor (33 k TYP.) C o n n e c t an external pull-up resistor of 2 . 2 k or more, if any, to this pin.
2
OUT
O u t p u t pin
33 k 2 Output transistor From waveform shaping circuit
3
V CC2
P o w e r output pin VCC1
C o n n e c t a capacitor of 47 µF or so to t h i s pin to stabilize the supply voltage to t h e internal circuit.
3
Internal circuit power line
4
fO
B P F frequency s e t t i n g pin 4 fO setting block of BPF Trimming resistor
S e t s the central frequency of the i n t e r n a l bandpass filter by an external r e s i s t a n c e (refer to fO vs. R2 Characteri s t i c s in CHARACTERISTIC CURVE). U s e a resistor with excellent accuracy a n d temperature characteristics.
5 6
GND CD
G r o u n d pin Detection capacitor c o n n e c t i o n pin Waveform shaping circuit
G N D pin C o n n e c t a smoothing capacitor to this p i n to obtain a DC voltage corresponding t o the output signal level of the internal b a n d p a s s filter. T h e 0.01 µF is the most suitable value f o r the external capacitor between pin 6 a n d GND. In case of reducing this c a p a c i t o r , confirm that the output pulses f r o m pin 2 have enough width even if t h e longest burst signal is inputted.
6
BPF output signal
3
Others parts begin by up
UP-1 UP-2 UP-3 UP-4 UP-5 UP-6 UP-7 UP-8 UP-9 UP-10 UP-11 UP-12 UP-13 UP-14 UP-15 UP-16 UP-17 UP-18 UP-19 UP-20 UP-21 UP-22 UP-23 UP-24 UP-25 UP-26 UP-27 UP-28
|
|
|
