TA8155FG/FNG TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8155FG,TA8155FNG REC / PB System Dual Pre−amplifier (1.5 / 3V USE) The TA8155FG and TA8155FNG are REC / PB system dual pre amplifier ICs, which are developed for low voltage operation (1.5 / 3V use). These are especially suitable for a stereo headphone cassette player. Features • Built−in dual playback amplifiers. Input coupling condenser−less. Built−in capacitor for buzz noise. • Built−in dual buffer amplifiers. For radio signal inut. Monitor for REC mode. • Built−in dual microphone amplifiers. Built−in an ALC circuit for MIC−REC mode. Attack time. : 0.1s (typ.) Recovery time. : 3.5s (typ.) • Built−in dual recording amplifiers. Single−end output type. • Built−in a power switch. • Low quiescent current. (VCC = 1.2V, Ta = 25°C) PB mode .................... ICCQ2 = 2.6mA (typ.) Weigh SSOP24-P-300-1.00: 0.32g (typ.) SSOP24-P-300-0.65A: 0.14g (typ.) Radio mode ............. ICCQ3 = 2.4mA (typ.) Radio−REC mode ... ICCQ4 = 3.0mA (typ.) ........ ICCQ5 = 4.5mA (typ.) Low power dissipation. MIC−REC mode • PB mode : 2.9mW (typ.) MIC−REC mode : 8.9mW (typ.) • Operating supply voltage range. (Ta = 25°C) VCC (opr) = 0.9~4V VCC (opr) (REC) = 1.8~4V 1 2006-04-12 TA8155FG/FNG Block Diagram 2 2006-04-12 TA8155FG/FNG Terminal Explanation Terminal Voltage : Typical Terminal Voltage at no Signal with Test Circuit. (VCC = 1.2V, VCC (REC) = 2.4V, Ta = 25°C) Terminal No. Name 1 VCC(REC) 2 REC OUTB 3 REC OUTA 4 PB INB 5 PB INA 7 PB NFB 10 PB NFA 6 VREF 8 PB OUTB Function Internal Circuit Terminal Voltage (V) This terminal voltage supplies output stage of recording amplifier with power source. 2.4 Output of recording amplifier. 1.15 Input of playback amplifier. 0.85 NF of playback amplifier. 0.85 Reference voltage. All amplifier operate on this voltage. 0.85 Output of playback amplifier and buffer amplifier. 0.55 9 PB OUTA 11 REC SW REC / PB switch. VCC: REC mode. GND / OPEN: PB mode. ― 12 PW SW Power switch. VCC: Power on. GND / OPEN: Power off. ― 15 Line SW Line switch. VCC: BUF (radio) mode. GND / OPEN: Tape mode. ― 3 2006-04-12 TA8155FG/FNG Terminal No. Name 13 BUF INA Function Internal Circuit Input of buffer amplifier and recording amplifier. (Buffer amplifier is inverter type.) Terminal Voltage (V) 0.85 ALC level of microphone amplifier is determined by signal level of this terminal 14 BUF INB 16 MIC OUTB 17 MIC OUTA 18 MIC NFA 22 MIC NFB 19 MIC INA Output of microphone amplifier. 0.55 NF of microphone amplifier. 0.05 Input of microphone amplifier. Built−in capacitor for buzz noise. 0.01 21 MIC INB 20 GND ― ― 0 23 VCC ― ― 1.2 24 ALC ALC terminal. ALC function is operated in only MIC−REC mode. 0.11 4 2006-04-12 TA8155FG/FNG Application Note (1) PW SW It is necessary to connect an external pull−down resistor with the terminal PW SW (pin(12)), in case that this IC is turned on due to external noise etc. (2) Mode SW Table.1 IC mode IC mode is determined by switch condition of RED SW (pin(11)) and LINE SW (pin(15)) REC SW L H L PB mode (PB) MIC−REC (BUF,MIC,REC) H Radio mode (BUF) Radio−REC mode (BUF,REC) LINE SW (Table.1) H level: Bias current should be applied to switch terminal more than 5µA. L level: Bias voltage should be applied to switch terminal from 0V to 0.3V. ( ) : Operating amplifier. The leak current flows through the terminal of REC SW (pin(11)) or LINE SW (pin(15)), in case that the terminals connected with VCC line independently, even though this IC is off−mode (the terminal of PW SW (pin(12)) is off−mode). And it is necessary to connect an external pull−down resistor with the terminal REC SW (pin(11)) and LINE SW (pin(15)), in case that this IC is turned on due to external noise etc. (3) Playback amplifier Output voltage of playback amplifier is determined by an external resistor R1 and Rf. VO (PRE) = VREF−∆V−Rf ( ∆V − IB(NF) ) R1 ∆V is an off−set voltage which is designed to 18mV. In case that β of transistor is assumed 100, IB(NF) is flowed 0.2µA in Fig.1. And output voltage of playback amplifier (pin (8),(9)) in Fig.1 is VO (PRE) = 0.85V−0.018V− (330kΩ+13kΩ) x( 0.018V - 0.2µA ) = 0.56(V) 18kΩ Output voltage of playback amplifier should be fixed VCC / 2, because playback amplifier get a enough dynamic range. And current source of 20µA is operated except playback mode, in order to reduce a pop sound in swichover between playback on / off mode (Fig.2). Fig.1 DC output voltage of playback amplifier. 5 2006-04-12 TA8155FG/FNG (4) Microphone amplifier Current source of 5.5µA is operated except MIC−REC mode, because bias is applied to the same output voltage as output voltage of microphone amplifier in operation (Fig.3). (5) VCC (REC) The VCC (REC) terminal (pin(1)) is applied bias to VCC (REC) = VCC−0.7V, because the VCC (REC) terminal (pin(1)) is connected with the VCC terminal (pin(23)) by diode, as internal circuit of termial explanation. And supply current doesn't flow through VCC (REC) terminal (pin(1)), in case that the terminal is connectd with VCC line, even though this IC is on−mode and except REC mode. Fig.2 Reducing a pop sound of mode switchover (1). Fig.3 Reducing a pop sound of mode switchover (2). Absolute Maximum Ratings (Ta = 25°C) Characteristic Supply voltage Power dissipation TA8155FG TA8155FNG Symbol Rating VCC 4.5 VCC (REC) 4.5 PD (Note) 400 500 Unit V mW Operating Temperature Topr −25~75 °C Storage temperature Tstg −55~150 °C (Note) Derated above Ta = 25°C in the proportion of 3.2mW / °C for TA8155FG, and of 4mW / °C for TA8155FNG. 6 2006-04-12 TA8155FG/FNG Electrical Characteristics Unless Otherwise Specified: VCC = 1.2V, VCC(REC) = 2.4V, f = 1kHz, Ta = 25°C, SW1: a, SW8: OPEN, SW 9: ON, SW10: ON, SW11: ON, SW2~SW7 condition by next page Characteristic Quiescent current Playback amplifier Buffer amplifier Test Cir− cuit Test Condition Min. Typ. Max. Unit µA PW off ICCQ1 SW1: b, SW2: b, SW3: b ― 0.1 5 PB ICCQ2 SW2: b, SW3: b ― 2.6 3.9 Radio ICCQ3 SW2: b, SW3: a ― 2.4 3.6 Radio−REC ICCQ4 SW2: a, SW3: a ― 3.0 4.5 MIC−REC ICCQ5 SW2: a, SW3: b ― 4.5 6.5 VCC (REC) ICCQ6 SW2: a, SW3: b 1.3 1.5 2.4 0.8 0.85 0.9 Reference voltage Recording amplifier Symbol ― mA VREF ― Open loop voltage gain GVO ― SW8: ON, SW9: OPEN Vo = −17dBV 58 70 ― Closed loop voltage gain GVC ― Vo = −17dBV ― 36 ― Maximum output voltage Vom1 ― THD = 1% 200 310 ― mVrms Total harmonic distortion THD1 ― Vo = −17dBV ― 0.1 0.3 % Equivalent input noise voltage Vni ― SW4: OPEN BPF = 30Hz~20kHz NAB (GV = 36dB,f = 1kHz) ― 1.2 3.0 µVrms Cross talk (CH−A / CH−B) CT1 ― Vo = −17dBV ― 62 ― Ripple rejection ratio RR1 ― SW4: OPEN, SW10: OPEN fr = 100Hz, Vr = −32dBV ― 40 ― Voltage gain GV2 ― Vo = −17dBV −4 −2 0 dB Maximum output voltage Vom2 ― THD = 1% 200 270 ― mVrms Total harmonic distortion THD2 ― Vo = −17dBV ― 0.1 ― % Output noise voltage Vno2 ― SW5: b, BPF = 30Hz~20kHz ― 35 ― µVrms Cross talk (CH−A / CH−B) CT2 ― Vo = −17dBV ― 51 ― Ripple rejection ratio RR2 ― SW5: b, SW10: OPEN fr = 100Hz,Vr = −32dBV ― 55 ― Voltage gain GV3 ― Vo = −12dBV 16.5 18.5 20.5 dB Maximum output voltage Vom3 ― THD = 1% 500 720 ― mVrms Total harmonic distortion THD3 ― Vo = −12dBV ― 0.1 0.5 % Output noise voltage Vno3 ― SW5: b, BPF = 30Hz~20kHz ― 0.09 0.25 mVrms Cross talk (CH−A / CH−B) CT3 ― Vo = −12dBV ― 49 ― Ripple rejection ratio RR3 ― SW5: b, SW10: OPEN fr = 100Hz, Vr = −32dBV ― 40 ― 7 V dB dB dB dB 2006-04-12 TA8155FG/FNG Symbol Test Cir− cuit Voltage gain GV4 ― Maximum output voltage Vom4 Total harmonic distortion Microphone amplifier + recording amplifier Microphone amplifier Characteristic Min. Typ. Max. Unit Vo = −17dBV 30 32.5 35 dB ― THD = 1% 120 200 ― mVrms THD4 ― Vo = −17dBV ― 0.25 0.8 % Output noise voltage Vno4 ― SW6: a, BPF = 30Hz~20kHz ― 0.12 ― mVrms Cross talk (CH−A / CH−B) CT4 ― Vo = −17dBV ― 52 ― Ripple rejection ratio RR4 ― SW6: a, SW10: OPEN fr = 100Hz,Vr = −32dBV ― 36 ― Voltage gain GV5 ― SW7: ON, Vo = −17dBV ― 58 ― dB Maximum output voltage Vom5 ― THD = 3% 600 800 ― mVrms ALC total harmonic distortion THD5 ― Vin = −32dBV ― 0.8 ― % Output noise voltage Vno5 ― SW6: a, BPF = 30Hz~20kHz ― 2.1 3.5 mVrms VoALC1 ― Vin = −62dBV VoALC2 ― ALC channel balance CBALC ― ALC width WALC ― CT5 dB −11.7 −8.5 −6.7 −11.7 −8.5 −6.7 ― 0 1.5 VoALC ≤ 3dB (input voltage) with respect to standard Vin = −42dBV ― 48 ― ― Vin = −32dBV ― 37 ― RR5 ― SW6: a, fr = 100Hz, Vr = −17dBV ― 39 ― Power on current I12 ― SW1: c, SW2: b, SW3: b V6 ≥ 0.6V 5 ― ― µA Power off voltage V12 ― SW1: d, SW2: b, SW3: b V6 ≤ 0.2V 0 ― 0.3 V ALC voltage Cross talk (CH−A / CH−B) Ripple rejection ratio Power switch Test Condition Vin = −32dBV dBV dB dB Switch Condition For Test Mode (unless otherwise specified.) PB AMP. (PB mode) BUF AMP. (radio mode) REC AMP. (radio−REC mode) PB BUF BUF REC MIC−ALC BUF, REC SW 2 b b a a SW 3 b a a b SW 4 ON OPEN OPEN OPEN SW 5 b a a SW 6 a a a SW 7 OPEN OPEN OPEN Mode Operating Amplifier MIC AMP. (MIC mode) MIC AMP. + REC AMP. (MIC−REC mode) Switch 8 b c b ON OPEN 2006-04-12 TA8155FG/FNG Test Circuit (*) RR5 is measured by circuit below (for VCC line) 9 2006-04-12 TA8155FG/FNG Characteristic Curves Unless Otherwise Specified VCC = 1.2V, VCC(REC) = 2.4V, f = 1kHz, Ta = 25°C RL = 10kΩ : PB amp., BUF amp., MIC amp. (load of recoading amplifier is shown in test circuit) 10 2006-04-12 TA8155FG/FNG 11 2006-04-12 TA8155FG/FNG 12 2006-04-12 TA8155FG/FNG 13 2006-04-12 TA8155FG/FNG 14 2006-04-12 TA8155FG/FNG Package Dimensions Weight: 0.32g (typ.) 15 2006-04-12 TA8155FG/FNG Package Dimensions Weight: 0.14g (typ.) 16 2006-04-12 TA8155FG/FNG RESTRICTIONS ON PRODUCT USE 060116EBA • The information contained herein is subject to change without notice. 021023_D • TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc. 021023_A • The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. 021023_B • The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. 060106_Q • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. 021023_C • The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_E About solderability, following conditions were confirmed • Solderability (1) Use of Sn-37Pb solder Bath · solder bath temperature = 230°C · dipping time = 5 seconds · the number of times = once · use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder Bath · solder bath temperature = 245°C · dipping time = 5 seconds · the number of times = once · use of R-type flux 17 2006-04-12