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) 6