Hynix GL3276 Less changes of malfunction associated with a high-frequency lighting fluorscent lamp internal trap circuit. Datasheet

GL3276A
GL3276A
Pin configuration
Description
The GL3276A is a bipolar analog ICs specifically
developed for use in infrared remote control system
receiving preamplifiers. Capable of accepting a
photodiode directly, these ICs house a high gain
initial amplifier, a limiter, a band-pass filter, a
detection circuit and a waveform shaping circuit
assembled on a single chip.
(SOP)
Features
• Less changes of malfunction associated with
a high-frequency lighting fluorscent lamp
internal trap circuit.
• The central frequency can be varied with an
external resistance:
fo=30 to 80KHz
fo rimming reduce central frequency variance.
• Few external parts.
Internal pull-up resistance and power filter
resistance.
Lower-capacitance external capacitor
• Open collector output
Open collector output with a pull-up resistance.
VCC1
1
Out
2
8
IN+
7
IN-
GL3276A
VCC2
3
6
CD
fo
4
5
GND
Block Diagram
4
3
f0
1
VCC1
RL
Detector
IN+
Waveform
shaper
20
VCC2
RS
BPF
Initial
Stage
amplifier
Limiter
+
TRAP
ABLC
IN7
CD
GND
5
20
C2
R1
C1
1
OUT
2
OUTPUT
GL3276A
Absolute Maximum Ratings(Ta=25 ¡ )É
SYMBOL
PARAMETER
VALUE
UNIT
VCC
Supply voltage
6.0
V
IOUT
2.5
mA
270
mW
TOPR
Output Current
Allowable power
dissipation
Operating temperature
- 20 to +75
¡ É
TSTG
Storage temperature
-40 to +125
¡ É
PD
Recommended Operating Condition
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
VCC
Supply voltage
4.5
5.0
5.5
V
fIN
Input frequency
30
38
80
KHz
Electrical characteristics (VCC = 5.0V, Ta = 2.5¡ )É
SYMBOL
PARAMETER
ICC
Supply current
VIN
Input voltage
AV
Voltage gain
FBW
BPF bandwidth
rIN
Input impedance
tPW1
Output pulse width
tPW2
TEST CONDITION
IIN = 0A
IIN=-330 µA
fIN=38kHz
VIN=30 µVP-P
-3dB Bandwidth
VIN=30 µVP-P
fIN=38kHz CW
VIN=0.2 µVP-P
fIN=38kHz
burstwave
VIN=500 µVP-P
fIN=38kHz
burstwave
VIN=50mVP-P
Low Level
output voltage
Low Level
output voltage
VOL
VOH
Note 1 : rIN =
47
( VIN
MIN
TYP
MAX
UNIT
1.2
2.8
mA
2.0
0.6
2.5
0.8
3.1
1.7
V
70
76
80
dB
2.0
2.5
3.0
KHz
80
110
160
K§ Ù
770
µS
440
440
0.2
4.8
5.0
770
µS
0.4
V
REMARK
note
*
1
note
*
1
V
K§ Ù(where VIN=input level, VX=test value)
VX ) 1
2 : input burst
wave form
output pulse
600 µS
600 µS
2
38KHz Carrier
GL3276A
Pin Description
NO.
SYMBOL
1
VCC1
Power input
3
VCC2
Power output
5
GND
Ground
PIN FUNCTION
8
IN +
Input
7
IN -
Initial amplifier
Gain setup
4
fo
BPF
frequency
setup
6
CD
Detection
capacitor
2
OUT
• Apply a voltage of 5V ¡ ¾10 % to pin 1.
As the power is output to pin 3 through the internal
power filter resistance, connect an electrolytic
capacitor to pin 3.
• With an internal impedance of 110 K§ Ù(typ.) pin 8
can accept a PIN photodiode directly. An automatic
bias level control (ABLC) circuit prevents the input
from being saturated by external light,
assuring bias level stability for the input pin.
• Initial amplifier differential inverted output. Its gain
can be set up with an external impedance.
• The central frequency of the band-pass filter can be
varied with an external resistance. A built-in trap
circuit prevents malfunctions associated with a highfrequency lighting fluorescent lamp.
• Pin to which a detection capacitor is connected.
• Open collector output with pull-up resistance.
Its capability to drive a CMOS or TTL makes for easy
connection with a receiving microcomputer.
The GL3276A has an active low output.
Output
Sample Application Circuits
8 Pin Plastic
SOP
Photo diode
C1
1500pF
R1
0 to 1k
8
7
IN +
IN -
0.01µF
6
5
CD
GND
GL3276A
VCC1
OUT
VCC2
f0
1
2
3
4
Power
supply
Output
130 k§ Ù
( R 2)
47 µF
3
GL3276A
Typical Characteristics (TA = 25¡ É)
Supply Current vs. Supply Voltage
Frequency vs. Resistance (R2)
Vcc=5V
90
fo - Frequency-kHz
80
2
1.5
1
70
60
50
40
0.5
30
2.5
3
3.5
4
4.5
5
5.5
20
6.5
40
60
80 100 120 140 160 180 200
R2-Resistance-k§ Ù
VCC-Supply Voltage
Gain vs. Capacitance(C1)
Voltage Gain vs. Input Frequency
90
VCC=5V
80
R2=130k§ Ù
Vi=30¥ V
ì p-p
78
AV-Voltage Gain-dB
Gain-dB
82
V-Voltage
ICC-Supply Current-mA
2.5
70
60
50
40
30
74
70
66
20
10
0
25
30
35
40
45
50
1000
fIN-Input Frequency
2000
3000
4000
CI-Capacitance-pF
Frequency
4
5000
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