SM5306A Low Voltage, 3-channel Video Buffer OVERVIEW The SM5306A is a 3-channel low-voltage video buffer IC that can drive a 75Ω termination resistance load. The output buffer gain can be switched between 0dB and 6dB. A built-in sag compensation circuit enables a lower output coupling capacitance to be used. The device operates from a 3.0 to 5.5V supply. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ PINOUT Supply voltage: 3.0 to 5.5V Current consumption: 24mA (VCC = 3.3V) Output gain switching: 0dB (GSEL = LOW) 6dB (GSEL = HIGH) Gain error: ± 0.5dB Maximum passband frequency: over 20MHz Maximum output voltage: min. 2.0Vp-p (gain = 6dB) Sag compensation circuit built-in Synctip clamp input Operating ambient temperature range: 0 to 70°C Package: 16-pin VSOP (Pb free) (Top view) 1 VCC1 16 OFB1 IN1 OUT1 GND1 VCC2 IN2 OFB2 GND2 OUT2 GSEL VCC3 IN3 OFB3 8 GND3 9 OUT3 APPLICATIONS LCD monitor ORDERING INFORMATION PACKAGE DIMENSIONS (Unit: mm) + 0. 0.15 − 1 0.05 0.5 ± 0.2 16-pin VSOP 4.4 ± 0.2 SM5306AV 6.4 ± 0.2 Package 0.275TYP 5.1 ± 0.2 1.15 ± 0.1 Device 0.65 0.10 + 0.1 0.22 − 0.05 0 to 10 ° 0.10 ± 0.05 ■ 0.12 M SEIKO NPC CORPORATION —1 SM5306A BLOCK DIAGRAM VCC1 OFB1 − IN1 0dB/6dB OUT1 + CLAMP VCC2 GND1 OFB2 − IN2 0dB/6dB OUT2 + CLAMP GND2 VCC3 GSEL OFB3 − IN3 0dB/6dB OUT3 + CLAMP GND3 PIN DESCRIPTION Number Name I/O1 1 VCC1 – Supply voltage 1 2 IN1 I Video signal input 1 3 GND1 – Ground 1 4 IN2 I Video signal input 2 5 GND2 – Ground 2 6 GSEL I Gain select (LOW: 0dB, HIGH: + 6dB) 7 IN3 I Video signal input 3 8 GND3 – Ground 3 9 OUT3 O Video signal output 3 10 OFB3 O Output feedback 3 (for sag compensation circuit) 11 VCC3 – Supply voltage 3 12 OUT2 O Video signal output 2 13 OFB2 O Output feedback 2 (for sag compensation circuit) 14 VCC2 – Supply voltage 2 15 OUT1 O Video signal output 1 16 OFB1 O Output feedback 1 (for sag compensation circuit) Description 1. I: input, O: output SEIKO NPC CORPORATION —2 SM5306A PIN EQUIVALENT CIRCUIT Number Name 2 4 7 IN1 IN2 IN3 6 GSEL 16 13 10 OFB1 OFB2 OFB3 15 12 9 OUT1 OUT2 OUT3 Equivalent circuit R R R R SEIKO NPC CORPORATION —3 SM5306A SPECIFICATIONS Absolute Maximum Ratings VCC1 = VCC2 = VCC3 = VCC, GND = 0V, unless otherwise noted Parameter Symbol Supply voltage range VCC Input voltage range VIN Storage temperature range Condition GSEL pin Rating Unit − 0.3 to 7.0 V GND – 0.3 to VCC + 0.3 V TSTG − 55 to + 125 °C PD 250 mW Rating Unit VCC 3.0 to 5.5 V Ta 0 to 70 °C Power dissipation Recommended Operating Conditions Parameter Supply voltage Symbol Operating ambient temperature range Condition DC Characteristics (GSEL) VCC = 3.0 to 5.5V, Ta = 0 to 70°C, unless otherwise noted Rating Parameter Symbol Condition Unit min typ max HIGH-level input voltage VIH VCC – 0.5 – – V LOW-level input voltage VIL – – 0.5 V Input leakage current ILL VIN = 0V – – 1 µA ILH VIN = VCC – – 1 µA Analog Characteristics VCC = 3.3V, Ta = 25°C, RL = 150Ω, fin = 100kHz, VIN= 1.0Vp-p, unless otherwise noted See “Measurement Circuit Diagram” Parameter Current consumption 1 Symbol Condition Rating min typ max Unit ICC1 Gain = 6dB, no signal input – 24 30 mA Current consumption 2 ICC2 VCC = 5.5V, Gain = 6dB, no signal input – 26 35 mA Output gain 1 AV1 Gain = 0dB – 0.5 0 0.5 dB 5.5 6.0 6.5 dB – – ± 0.3 dB Output gain 2 AV2 Gain = 6dB Channel gain error dAV Gain = 0dB, 6dB Gain = 6dB, ratio with VOUT = 2Vp-p – – 65 – dB FPB1 –1dB, gain = 0dB 20 49 – MHz Maximum passband frequency 2 FPB2 –1dB, gain = 6dB 20 23 – MHz Input voltage VAIN1 AC-coupled input, Gain = 0dB, 6dB – – 1.0 Vp-p Channel crosstalk Maximum passband frequency 1 CT Maximum output voltage 1 VOUT1 Gain = 0dB, THD = 1% 1.0 – – Vp-p Maximum output voltage 2 VOUT2 Gain = 6dB, THD = 1% 2.0 – – Vp-p Input clamp voltage VCLMP No signal input 1.15 1.35 1.55 V – – 1 % Output distortion ratio THD Gain = 6dB SEIKO NPC CORPORATION —4 SM5306A Measurement Circuit Diagram + 4.7µF 0.1µF + 22µF INPUT1 INPUT2 INPUT3 4.7µF OFB1 + IN1 OUT1 + GND1 VCC2 IN2 OFB2 + GND2 OUT2 + GSEL VCC3 IN3 OFB3 + OUT3 + VCC1 + 4.7µF + 4.7µF + GND3 75Ω 75Ω 75Ω 75Ω 75Ω 75Ω 0.1µF 100µF + 22µF 0.1µF 100µF + 22µF 100µF FUNCTIONAL DESCRIPTION Output Gain Setting (GSEL) GSEL pin Output gain LOW 0dB HIGH 6dB SEIKO NPC CORPORATION —5 SM5306A TYPICAL APPLICATION CIRCUIT Application Circuit 1 (standard connection) + VCC1 4.7µF IN1 VR + CLAMP − GND1 OFB1 22µF OUT1 100µF + 75Ω 75Ω + + + VCC2 4.7µF IN2 + VR CLAMP GND2 − OFB2 22µF OUT2 100µF + 75Ω 75Ω + + + VCC3 GSEL 4.7µF VR IN3 OFB3 22µF OUT3 100µF + 75Ω + CLAMP − 75Ω + + H GND3 L Note. Capacitance does not restrict to this value. Application Circuit 2 (capacitively-coupled display module connection) ■ ■ Capacitor connections to the SM5306A output pins are not required. Short circuit OUT× pins to OFB× pins. In this mode, the sag compensation circuit does not function. Display Module 6dB OUT + − 75Ω 75Ω OFB SM5306 Note. Only output connection is shown. Application Circuit 3 (input connection to next stage on same printed circuit board) ■ A gain of 0dB is suitable, since matching resistors are not required. In this case, it is recommended that a 1kΩ resistor be connected to ground. 6dB OUT + 100µF + − 22µF 1kΩ + OFB SM5306 Note. Only output connection is shown. SEIKO NPC CORPORATION —6 SM5306A TYPICAL CHARACTERISTICS VCC = 3.3V, Ta = 25°C, RL = 150Ω, fin = 100kHz, VIN= 1.0Vp-p, unless otherwise noted See “Measurement Circuit Diagram” Phase -10 6 -30 0 Phase [deg] Gain [dB] 3 9 -50 Gain -10 Gain 3 -30 0 -50 -3 -70 -3 -70 -6 -90 -6 -90 -9 -110 -9 -110 -130 100 -12 -12 0 1 10 0 1 Frequency [MHz] 10 -130 100 Frequency [MHz] Figure 1. Frequency response (Gain = 0dB) Figure 2. Frequency response (Gain = 6dB) 30 30 28 28 5.5V 26 Icc [mA] Icc [mA] 10 Phase Phase [deg] 6 10 Gain [dB] 9 24 26 24 3.3V 22 22 20 20 -20 0 20 40 60 80 3 100 3.5 4 Ta [°C] Figure 3. ICC vs. Ta (no signal input) 5.5 7 6dB 6 6dB 6 5 5 4 Gain [dB] Gain [dB] 5 Figure 4. ICC vs. VCC (no signal input) 7 3 2 1 4 3 2 0dB 1 0dB 0 0 -1 -20 4.5 Vcc [V] -1 0 20 40 60 Ta [°C] Figure 5. Gain vs. Ta 80 100 3 3.5 4 4.5 5 5.5 Vcc [V] Figure 6. Gain vs. VCC SEIKO NPC CORPORATION —7 SM5306A Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SEIKO NPC CORPORATION 15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan Telephone: +81-3-6667-6601 Facsimile: +81-3-6667-6611 http://www.npc.co.jp/ Email: [email protected] NC0307BE 2006.04 SEIKO NPC CORPORATION —8