GL3277
1
GL3277
PREAMPLIFIER FOR REMOTE CONTROL USE
Description
The GL3277 is a bipolar analog ICs specifically
developed for use in infrared remote control system
receiving preamplifiers.
Features
Enhanced immunity against all kinds of disturbance light
No occurence of disturbance pulses at the output
Output active low
Simple applications
Support RC-5 code , NEC code
Operating frequency : 38kHz
2.5kHz @ Vcc=5V, Ta=25
Pin Configurations
Block Diagram
1
2
3
4
8
7
6
5
DGND
C
AGC
OUT
VCC
NC
NC
AGND
IN
8 SOP
The information in this document is subject to change without notice.
5
6
2
1
8
3
VCC
OUT
BIAS
IN
Photo
diode
Input stage
Variable
amp
BPF
Output
stage
AGND
C
AGC
7
4
DGND
R
L
NC
NC
AGC
GL3277
2
Characteristics
Pin
Power Supply Voltage
1
Operating Temperature Range
Storage Temperature Range
-
-
Symbol
VCC
Tstg
Value
6
-40 to +125
Unit
Vdc
Absolute Maximum Ratings
(Ta=25
, unless otherwise noted)
Electrical Characteristics
(VCC=5V, Ta=25
, f
oper
=38kHz, unless otherwise noted)
Characteristics
Pin
Operating Supply Voltage
1
Symbol
VCC
Unit
Vdc
Recommended Operating Condition
Operating Supply Current
Input Voltage
BPF Bandwidth ( -3dB )
Output Pulse Width
Low Level Output Voltage
High Level Output Voltage
Icc
V
IN
Av_min
f
BW
tpw1
tpw2
V
OL
V
OH
No Signal
I
IN
= 0A
I
IN
= -330
V
IN
= 30
p-p
Pin2=2.5V
V
IN
= 30
p-p
f
IN
= 38
burst
V
IN
= 500
p-p
f
IN
= 38
burst
V
IN
= 50mV
p-p
-
-
Characteristics
Symbol
0.3
3.6
0.8
40
-
440
440
-
4.8
MIN
0.7
4.1
1.3
-
5
600
600
0.2
5.0
TYP
1.7
4.6
1.8
80
-
770
770
0.4
-
MAX
note 1
REMARK
600
s
Value
4.5 to 5.5
mA
V
dB
kHz
s
V
V
Unit
note 1
600
s
V
OH
V
OL
V
OUT
V
IN
t
60 ms
t
pw
Voltage Gain
Av_max
V
IN
= 30
p-p
Pin2=1.5V
80
-
110
dB
0 to 70
Ta
Conditions
GL3277
3
Pin Descriptions
No
Symbol
Description
3
4
5
6
7
8
1
2
OUT
DGND
IN
AGND
NC
NC
VCC
C
AGC
Output
Ground
Input
Ground
-
-
Supply vtg.
AGC cap.
Open collector output with pull-up resistance. Active low output.
Input stage, Variable amp, AGC, BPF ground
Input connection for photodiode with bias voltage
Output stage ground
-
-
Supply voltage of 5V
10%
AGC capacitor connected.
1
2
3
4
8
7
6
5
5V
photo diode
output
33
60 nF
47
F
Application Circuit
NC
NC
AGND
IN
DGND
C
AGC
OUT
VCC
GL3277
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