CO8301 (Preliminary) Stereo Headphone Amplifier Description The CO8301 is a monolithic integrated circuit and suitable dual amplifier for low power. Feature 10-SSOP-225 1 l Low quiescent current l High power supply ripple rejection l Low voltage operation l A few of external part required l Built in power save switch l Built in mute switch Typical Applications l Portable compact disk player (DISCMAN) l Portable mini disk player (MD) l Disc-Man l MP3 Player l CD-Rom l Other portable compact Disk Media Fan Motor Driver * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 1 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier Block Diagram PS 1 POWER SAVE SWITCH CTL MUTE CTL REF INA 10 MUTE 9 OUTA 2 8 GND REF GND 3 REF INB 4 REF 5 7 OUTB 6 VCC REF * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 2 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier Pin Configuration 1 10 2 9 3 8 4 7 5 6 1-Power save switch 2-Signal input A 3-Signal ground 4-signal input B 5-Reference voltage 6-Supply voltage 7-Signal output B 8-Power ground 9-Signal output A 10-Mute on switch Ordering Information Device CO8301 Package 10-SSOP-225 Operating Temp. -20℃ ~ +75℃. * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 3 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier Absolute Maximum Rating (Ta = 25℃) Parameter Symbol Value Unit VCC 4.5 V PD 300 mW Operating Temperature TOPR -20 ~ +75 °C Operating Temperature Storage Temperature TSTG -55 ~ +125 °C Storage Temperature Tja 150 °C/W Maximum Supply Voltage Power Dissipation Thermal Resistance Remark Maximum Supply Voltage Power Dissipation - Power Dissipation Curve Power dissipation (mW) 300 150 Ambient temperature, Ta (°C) 25 75 125 Recommended Operating Conditions (Ta = 25℃) Parameter Operating Supply Voltage Recommended Load Symbol Min. Typ. Max. Unit VCC 1.8 3.0 4.0 V RL 16 - 32 Ω * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 4 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier Electrical Characteristics (RL =16Ω, Rg =600Ω, Ta = 25℃) Parameter Symbol Conditions Min. Typ. Max. Unit Quiescent Current 1 ICC1 VCC = 2.4V - 5.5 10.0 mA Quiescent Current 2 ICC2 VCC = 4.5V, Mute = GND - 1.0 2.0 mA Quiescent Current 3 ICC3 VCC = 4.5V, PS = GND - - 1.0 µA Close Loop Voltage Gain 1 GVC1 VCC = 2.4V, f = 1kHz, VO = -10dBm 30 32 34 dB Close Loop Voltage Gain 2 GVC1 VCC = 1.8V, f = 1kHz, VO = -20dBm 29 32 34 dB Channel Balance 1 ∆GV1 VCC = 2.4V, f = 1kHz, VO = -10dBm - - 1.0 dB Channel Balance 2 ∆GV2 VCC = 1.8V, f = 1kHz, VO = -20dBm - - 1.0 dB Total Harmonic Distortion THD VCC = 2.0V, f = 1kHz, PO = 1mW - 1.5 % 0.5 Ripple Rejection Ratio RR VCC = 1.8V, f = 100Hz, Rg = 1kΩ, VR = -20dBm, BPF = 100Hz 43 60 Crosstalk CT VCC = 2.4V, f = 100Hz, Rg = 1kΩ, VO = -10dB 43 50 VNOISE VCC = 4.5V, Rg = 1kΩ, BPF = 20Hz ~ 20kHz Output Power POUT VCC = 3.0V, f = 1kHz, THD = 10% PS Attenuation Ratio ATTPS MUTE Attenuation Ratio Output Noise Voltage - - 60 dB 100 - dB µVrms 20 40 mW VCC = 1.8V, f = 100Hz, PS = GND, VIN = -10dB - - -80 dB ATTMU VCC = 1.8V, f = 100Hz, MUTE = GND, VIN = -10dB - - -80 dB PS ON Input Current IPSON VCC = 1.5V, VREF ≥ 0.85V - 0.2 1.0 µA MUTE OFF Input Current IMOFF VCC = 1.5V, VREF ≥ 0.85V - 0.2 1.0 µA PS ON High Level VHPS VCC = 1.5V, VREF ≥ 0.85V 0.5 0.65 - V MUTE OFF High Level VHMU VCC = 1.5V, VREF ≥ 0.85V 0.5 0.65 - V * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 5 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier Application Information 1. PS Block This block diagram describes the power save switch circuits. The drive block is controlled by PS pin, which can be derived from micro controller. It controls bias of the internal circuits of CO8301, so that it makes CO8301 operate when input voltage level reaches high level. 2. Mute Block The block diagram describes the mute on switch circuits. The drive block is controlled by MUTE pin, which can be derived from micro controller. When the pin of mute turns on, it makes reference voltage of internal circuits approximately 0V, so that it keeps the device of CO8301 off. 3. AMP Block This block diagram describes the AMP block with resistances, which control gain of CO8301. The gain of CO8301 is VOUT -------------- ≅ 40 ≅ 32 [ dB ] V IN Output voltage of CO8301 can be 40 times as much as input voltage, so it eliminates the number of external circuits and offers headphone input. 4. Popping Noise Reduction If PS pin (Pin1 , Power save switch) connect the micro controller, the micro controller must follow the same sequence 1 in order to reduce popping noise on mute mode. PS on → Mute on → PS off → Mute operation → PS on → Mute off → Normal operation (Sequence 1) If PS connect VCC, the micro controller follow the sequence 2. Mute on → Mute Operation → Mute off → Normal operation (Sequence 2) * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 6 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier RL A 4.7uF 4.7 4.7 0.1uF 220uf 16 16 0.1uF 220uF V10 MUTE_SW VCC 6 OUTB 7 8 GND OUTA 22uF REF 5 INB 4 3 GND INA 2 1 2 Rg 1 2 Rg 1 3 PS_SW I1 2 V1 4 1 PS CO8301 9 10 MUTE 4 1 3 2 I10 RL DC RIPPLE Test Circuits * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 7 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier VDC 220uf 0.1uF 7 OUTB 6 VCC INB 5 REF GND 4 8 OUTA INA Sg2 Sg1 4.7uF VR 4.7uF VR PS_SW ON OFF 22uF GND 3 1 PS CO8301 9 2 10 MUTE 4.7uF 4.7 4.7 0.1uF 220uF ON MUTE_SW OFF PHONE JACK STEREO Typical Application Circuits * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 8 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052 CO8301 (Preliminary) Stereo Headphone Amplifier Package Dimensions 10-SSOP-225 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 9 of 9 Rev 0.1 Mar. 25, 2003 Fax:886-3-3521052