ETC HL3280

HL3280
PREAMPLIFIER FOR REMOTE CONTROL USE
1. OVERVIEW
1.1 Description
The HL3280 is a miniaturized receiver IC for use in the infrared remote control system.
It has a wide voltage operating such as 2.7~5.5V, a high sensitivity, and good noise
immunity. Wide operating is very suitable to the hand-held battery operating systems,
such as electrical toy.
This can also be suitable for high optical and electrical disturbances.
It has the frequency selecting Pads for setting the center frequency of band-pass filter
and also has 5 trimming Pads for the fine adjustment of center frequency.
The HL3280 is capable of accepting a photodiode directly and include many excellent
circuit such as an internal voltage reference for wide voltage operating, a high gain initial
amplifier, a gain control amplifier, a limiter, a band pass filter, a detection circuit, two
comparator circuits, gain control circuits, integrator circuits, a waveform shaping circuit
assembled on a single chip.
1.2 Features
• Wide operating supply voltage 2.7V ~ 5.5 V
• Built-in internal voltage reference circuit for wide operating
• Maximum interference safety against optical and electrical disturbances
• No external components necessary
• The center frequency can be varied with option PADs
( 32.7kHz, 36.7kHz, 37.9kHz, 40kHz, 56.7kHz)
• Internal filter for a high frequency lighting fluorescent lamp
• Open collector output (Open collector output with a pull-up resistor)
• Output active low
Version 2
Published by MagnaChip Semiconductor, Ltd. Oct. 25 2004. All right reserved.
Additional information of this datasheet may be served by MagnaChip Semiconductor offices in Korea or Distributors and Representatives
listed at address directory.
MagnaChip Semiconductor reserves the right to make changes to any information here in at any time without notice.
The information, diagrams and other data in this datasheet are correct and reliable; however, MagnaChip Semiconductor is in no
way responsible for any violations of patents or other rights of the third party generated by the use of this manual.
1
HL3280
2. ELECTRICAL CHARACTERISTICS
2.1 Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Unit
Supply Voltage
Vcc
0
6.0
V
Output Voltage
Vout
0
6.0
V
Output Current
Iout
0
2.5
mA
Operating Temperature
Topr
-25
85
℃
Storage Temperature
Tst
-40
125
℃
Conditions
* Stress above those listed under Absolute Maximum Ratings may cause permanent damage of device.
This is stress rating only and functional operation of the device at these or any other conditions above those
indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating
conditions for longer periods may affect device reliability.
During overload conditions (VIN>Vcc or VIN<GND), those voltage on Vcc pins with respect to ground must
not exceed the values defined by the absolute maximum ratings.
2.2 Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Unit
Operating Voltage
Vcc
2.7
-
5.5
V
Input Frequency
fin
30
38
60
kHz
Operating Temperature
Top
-20
25
80
℃
Conditions
2
HL3280
2.3 Electrical Specifications
Specifications hold over the recommended operating conditions, unless otherwise noted herein.
All values are at 25℃ and Vcc=3.0V/5.0V.
Parameter
Symbol
Supply Current
Icc
Max. Input current
Max. Voltage gain
BPF Bandwidth
Min.
Typ.
Max.
Unit
Conditions
-
1.3
2.5
mA
Iin = 0 ㎂, Vcc=3V
-
1.2
2.5
mA
Iin = 0 ㎂, Vcc=5V
0.8
-
1.75
mA
Iin = 0 ㎂, Vcc=5V
85
95
110
dB
fin=37.9kHz,
Vin=30㎶p-p, Vcc=3V
85
95
110
dB
fin=37.9kHz,
Vin=30㎶p-p, Vcc=5V
fBW
5
7
9
kHz
-3dB Bandwidth
Vin=30㎶p-p
tPW1
500
-
800
㎲
fin=37.9kHz, burst wave
Vin=500 ㎶p-p
*Note 1
IIN
Av
Output Pulse Width
tPW2
500
-
800
㎲
fin=37.9kHz, burst wave
Vin= 50mVp-p
*Note 1
Low Level
Output Voltage
VOL
-
-
0.25
V
Isink=2.0mA
High Level
Output Voltage
2.7
3.0
-
V
Vcc=3V
VOH
4.7
5.0
-
V
Vcc=5V
*Note 1.
carrier frequency : 37.9KHz
(Input burst waveform)
600 ㎲
600 ㎲
600 ㎲
600 ㎲
(Output pulse)
3
HL3280
3. Functional Block Diagram
VCC
Voltage
reference
circuit
Noise det. &
Gain ctrl.
IN
I-V
Convert
&
Input Bias
Control
Pre
amp
AGC
amp
Limit
amp
Band
Pass
Filter
Fset bias circuit
fc
Setting
fc
Trimming
Freq. selection
option pads
(S1~S4)
Trimming
Pads
(T1~T5)
Comparator
Integrator &
Wave
shaping
Output
stage
OUT
Threshold
control
circuit
GND
* fc(center frequency) can be varied with 4 option pins.
: 32.7KHz, 36.7KHz, 37.9KHz, 40.0KHz, 56.7KHz
Fc(Center Frequency)
PAD Setting Method (S1,S2,S3,S4)
32.7 kHz
No connection
36.7 kHz
S1(PAD6) is Ground
37.9 kHz
S2(PAD5) is Ground
40.0 kHz
S3(PAD3) is Ground
56.7 kHz
S4(PAD2) is Ground
4
HL3280
U.R.(1460,1200)
OUT
4. Floor Planning Diagram(Fc=37.9KHz)
VCC
16
1
15
14
13
12
11
10
9
2
GND
3
4
GND
5
HL3280
GND
6
8
7
L.L.( 0 , 0 )
Scribe Lane : 50um
• Chip size : 1460 um x 1200um (with scribe lane)
• PAD Open Size : 100 x 100 um (80 x 90 um for trimming and test PAD)
5. PADs Description
PAD Number
PAD Name
Description
PAD (X,Y)
1
VCC
VCC Pad
132.5 , 1023
2
S4
BPF Frequency selection pad
132.5 , 863
3
S3
BPF Frequency selection pad
132.5 , 703
4
MP2
Pad for Test
127.5 , 448
5
S2
BPF Frequency selection pad
132.5 , 298
6
S1
BPF Frequency selection pad
132.5 , 138
7
IN
Signal Input Pad
292.5 , 135
8
GND
Ground Pad
1322.5, 135
9
MP1
Pad for Test
1328 , 868.5
10
GND
Ground Pad for Output
1322.5, 1028.5
11
OUTPUT
Signal Output Pad
1012.5, 1045
12
T5
Trimming Pad
842.5 , 1051.5
13
T4
Trimming Pad
702.5 , 1051.5
14
T1
Trimming Pad
562.5 , 1051.5
15
T2
Trimming Pad
422.5 , 1051.5
16
T3
Trimming Pad
282.5 , 1051.5
5
HL3280
6. Application Guide
6.1 Example of Module(37.9KHz) Packaging Using HL3280
VCC
R1:100Ω
VCC
HL3280
IN
fc set pins
S1 S2 S3 S4
OUT
OUT
GND
C1:4.7uF
GND
6.2 Functional Guide of HL3280
• HL3280 is high gain amplifier for high sensitivity. So if you want better characteristics of
receivable distance, you have much careful attention in bonding of GND pads and shielding
to GND.
• For more better distance performance, it is important to suppress the supply noise.
The supply filter R1, C1 have to be located close to IC if possible.
• The photo diode is important factor in IR receiver module and you select it considerately.
• In packaging of IR module, the photo lens is good for receiving of photo signal.
But if the chip is included in the lens, the chip also receives the photo signal and the signal
acts as a noise in the chip. So when you design the lens or module frame, the above point
must be considered.
• In the detection or demodulation(wave shape) of incoming signal, HL3280 need the minimum
burst length of modulated signals.
The incoming photo signal is modulated with proper carrier signal(e.g. 37.9KHz) and if the
‘1’ data bit is modulated with carrier signal, the period of data bit ’1’ is important.
Because the carrier signals is in this period, the integration need minimum period to the reach
of appropriately level in the Integrator & Wave Shape block of HL3280.
Hence the minimum burst length is important characteristic and specification of remote
control systems. The minimum burst length of HL3280 is about 10 cycles of carrier.
(~10*Tfc) You can easily understand as see the Figure 1.
Figure 1.
carrier frequency : 37.9KHz
(Input burst waveform)
burst length
(Integrator output)
(Output pulse)
minimum
burst length
* The minimum burst length of HL3280:~10cycles of carrier (~10*Tfc)
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