ICs for Radio-Cassette, Cassette Deck AN7500FHQ Audio signal processing IC for 1.5 V headphone stereo ■ Overview Unit: mm 9.00±0.40 7.00±0.20 36 25 24 (0.75) 7.00±0.20 9.00±0.40 37 0.50 12 +0.10 0.20–0.05 ■ Features • Reduction by power consumption of approximately 35% as compared with conventional products, contributing to low power consumption of a set. • Eliminating the DC/DC converter so far needed for conventional system due to 1.5 V single power supply, and reducing approx. 40% of external components. This contributes to space saving in a set. • Built-in standby switch to reduce consumption current considerably. Seating plane +0.10 1 0.15–0.05 (0.75) 13 (0.625) 1.40±0.10 1.70 max. 48 (0.625) 0.10±0.10 The AN7500FHQ is a single chip IC optimum for a 1.5 V headphone stereo system including pre-amp., power amp. and Dolby B type noise reduction circuit. Current consumption in a Dolby circuit off mode has been drastically reduced and an operating supply voltage has also been lowered to 0.98 V. Much fewer external components have been realized due to an integration of audio signal processing system into a single chip circuitry in a small outline package and space saving mounting of a set. (1.00) 0° to 10° 0.50±0.20 LQFP048-P-0707 ■ Applications • Headphone stereo 1 AN7500FHQ ICs for Radio-Cassette, Cassette Deck 25 PWR in (R) 26 27 PWR in (L) 28 29 SB out (L) 30 31 32 33 N.R. out (L) N.R. in (L) 34 35 36 IREF ■ Block Diagram 160 Ω 37 24 86 kΩ 38 23 100 kΩ VREF VREF PB out (L) 39 40 25 kΩ 22 21 200 kΩ 20 REV in (L) 41 42 FWD in (L) VREF FWD in (R) 43 19 GND 17 44 16 AGC 25 kΩ 46 Ripple filter 200 kΩ VREF VREF 47 15 14 100 kΩ 86 kΩ 12 Power mute 10 ASC 8 SB out (R) 7 6 5 4 N.R. out (R) N.R. in (R) 3 2 1 9 160 Ω N.R. FWD REV On Off mute 13 Control Low BST 11 48 2 VCC 18 PWR out (L) Bias REV in (R) 45 PB out (R) PWR out (R) STBY ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Pin Descriptions Pin No. Description Pin No. Description 1 FWD/REV/pre-mute control 25 Power input (R) 2 Noise reduction on/off control 26 LPF1 capacitor pin 3 N.R. decoder input (R) 27 Power input (L) 4 N.R. decoder output (R) 28 Sub-buffer amp. input (L) 5 Side-chain filter (R) 29 Sub-buffer amp. output (L) 6 Weighting amp. filter (R) 30 Control voltage ripple filter (L) 7 Control voltage ripple filter (R) 31 Weighting amp. filter (L) 8 Sub-buffer amp. output (R) 32 Side-chain filter (L) 9 Sub-buffer amp. input (R) 33 N.R. decoder output (L) 10 Sub-buffer amp. on/off control 34 N.R. decoder input (L) 11 Low boost on/off control 35 Reference current resistance pin 12 Power mute on/off control 36 MS LPF C pin 13 Standby on/off control 37 MS output 14 Ripple filter input 38 MS filter pin 15 Ripple filter base pin 39 Playback amp. output (L) 16 Ripple filter output 40 Playback amp. negative feedback input (L) 17 AGC time constant 41 Playback amp. REV input (L) 18 Power output (L) 42 Playback amp. FWD input (L) 19 GND pin 43 Reference voltage output 20 Positive power supply 44 Playback amp. FWD input (R) 21 Power output (R) 45 Playback amp. REV input (R) 22 Low boost capacitor pin 2 46 Playback amp. negative feedback input (R) 23 LPF2 capacitor pin 47 Playback amp. output (R) 24 Low boost capacitor pin 1 48 Reference voltage input ■ Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Symbol Rating Unit VCC 2.1 V ICC 20 mA PD 249 mW Topr −20 to +70 °C Tstg −55 to +125 °C Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: Ta = 75°C 3 AN7500FHQ ICs for Radio-Cassette, Cassette Deck ■ Recommended Operating Range Parameter Symbol Supply voltage Range Unit 0.98 to typ. 1.2 to 2.0 V * VCC Note) *: Supply voltage of VCC of 0.95 V to 0.98 V is permissible as long as it does not cause any abnormal operation such as oscillation. ■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Voltage gain GV VO = −22.2 dBV 54 57 60 dB Circuit current 1 ICC1 VIN = 0, Rg = 2.2 kΩ, L. BST off, N.R. off 3.2 5.9 mA Circuit current 2 ICC2 VIN = 0, Rg = 2.2 kΩ, L. BST off, N.R. on 4.4 7.1 mA Circuit current 3 ICC3 Pout = 0.5 mW × 2-ch., RL = 32 Ω 7.0 11.2 mA Circuit current 4 ICC4 Pout = 0.5 mW × 2-ch., RL = 32 Ω, N.R. on 8.4 12.8 mA Circuit current 5 ICC5 STBY on 15 30 µA Pre-amp. block Open-loop voltage gain GVO(PB) VO = −22.2 dBV 61 73 dB Close-loop voltage gain GVC(PB) VO = −22.2 dBV 32.5 34 35.5 dB Max. output voltage Vomax(PB) THD = 1%, 30 kHz, LPF on 120 210 mV Total harmonic distortion THD(PB) VO = −22.2 dBV, 30 kHz, LPF on, GVC = 35 dB (NAB) 0.2 0.6 % Output noise voltage VNO(PB) Rg = 2.2 kΩ, IHF-A −90 −76 dBV Channel separation CS(PB) Sincgle ch. input, 1 kHz, BPF on, Rg = 2.2 kΩ, VO = −22.2 dBV 37 46 dB FWD/REV crosstalk CT(PB) Single ch. input, 1 kHz, BPF on, Rg = 2.2 kΩ, VO = −22.2 dBV 51 59 dB Ripple rejection factor RR(PB) Rg = 2.2 kΩ, VRR = −32.2 dBV, fRR = 100 Hz, IRFO = 15 mA, BPF: 100 Hz, 1/4 OCT 43 53 dB −85 −70 dB 21 23 25 dB 21.4 23.4 25.4 dB 15 19 23 dB THD = 10%, 30 kHz, LPF on 2.5 4.5 mW Total harmonic distortion THD(PW) Pout = 1 mW, 30 kHz, LPF on 0.35 1.3 % Channel separation 1 CS1(PW) Sincgle ch. input, 1 kHz, BPF, Rg = 0, VO = −22.2 dBV 33 40 dB Mute attenuation amount GMUTE(PB) Ratio to VO = −22.2 dBV, pre-mute on Heavy low sound + power amp. block Gain voltage 1 GV1(PW) VO = −22.2 dBV Gain voltage 2 GV2(PW) L. boost on, VO = −22.2 dBV Low frequency boost amount GV3(PW) L. boost on/off, f = 50 Hz, VIN = 65.2 dBV Rated output power 4 Pout ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Heavy low sound + power amp. block (continued) Channel separation 2 CS2(PW) Sincgle ch. input, Low boost on, Rg = 0, VO = −22.2 dBV, 1 kHz, BPF 25 31 dB Output noise voltage 1 VNO1(PW) Rg = 0, IHF-A −91 −86 dBV Output noise voltage 2 VNO2(PW) Low boost on, Rg = 0, IHF-A −86 −82 dBV Ripple rejection factor 1 RR1(PW) Rg = 0, VRR = −32.2 dBV, fRR = 100 Hz, IRFO = 15 mA, BPF: 100 Hz, 1/4 OCT 60 72 dB Ripple rejection factor 2 RR2(PW) Low boost on, Rg = 0, VRR = −32.2 dBV, fRR = 100 Hz, IRFO = 15 mA, BPF: 100 Hz, 1/4 OCT 40 61 dB Input resistance RIN(PW) 7.2 9.5 12 kΩ Channel balance CB(PW) VO = −22.2 dBV −1.5 0 1.5 dB Mute output voltage VMUTE(PW) VIN = −32.2 dBV −96 −90 dBV AGC level Output DC step VAGC VIN = −45.2 dBV, f = 100 Hz, −17.3 −14.7 −13.1 RL = 32 Ω, AGC level to be measured at 32 Ω end. DV(PW) PWR mute (pin 12) on/off −30 0 30 dBV mV Dolby block Reference input level *1 VIN(NR) N.R.: Off, BEF: Off, f = 1 kHz, VO = −32.2 dBV Channel balance CB(NR) (Calculation) channel ratio of the above VIN −33.9 −32.8 −31.7 dBV −1 0 1 dB N.R. decode characteristics 1 *2 G(NRD1) N.R.: On, BEF: Off, f = 10 kHz, VIN = −29.6 dB, Calculation NRD = VO +40 (dB) −2 0 2 dB N.R. decode characteristics 2 *2 G(NRD2) N.R.: On, BEF: Off, f = 1 kHz, VIN = −23.9 dB, Calculation NRD = VO +30 (dB) −2 0 2 dB N.R. decode characteristics 3 *2 G(NRD3) N.R.: On, BEF: Off, f = 1 kHz, VIN = −15.8 dB Calculation NRD = VO +20 (dB) −3.0 0 3.0 dB N.R. decode characteristics 4 *2 G(NRD4) N.R.: On, BEF: Off, f = 10 kHz, VIN = −17.4 dB Calculation NRD = VO +20 (dB) −2.5 0 2.5 dB N.R. decode characteristics 5 *2 G(NRD5) N.R.: On, BEF: Off, f = 10 kHz, VIN = 0.4 dB, Calculation NRD = VO (dB) −2 0 2 dB Note) *1: Adjust an input level to get an output level of −3.2 dBV at a measuring point (N.R. out) so that you can get 0 dB of reference input level. 2: V * O in the calculating equation is the output level based on reference of 0 dB = −32.2 dBV (measuring point: N.R. out). 5 AN7500FHQ ICs for Radio-Cassette, Cassette Deck ■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Dolby block (continued) Total harmonic distortion 1 *3 THD1(NR) N.R.: Off, BEF: On, f = 1 kHz, VIN = +10 dB, 30 kHz, LPF on 0.2 0.5 % Total harmonic distortion 2 *3 THD2(NR) N.R.: On, BEF: Off, f = 1 kHz, VIN = +10 dB, 30 kHz, LPF on 0.3 0.8 % Total harmonic distortion 3 *3 (Signal handling) THD3(NR) N.R.: On, BEF: Off, f = 1 kHz, VIN = +12 dB VCC = 1.1 V, 30 kHz, LPF on 0.3 1 % 70 72 dB N.R.: Off, BEF: On/off, f = 6.3 kHz, VIN = 0 dB −12 −8 dB VCC = 1.1 V, VRR = −32.2 dBV fRR = 100 Hz, IRFO = 15 mA BPF: 100 Hz, 1/4 OCT 24 30 dB Signal to noise ratio, N.R. on *4 VNO(NR) N.R.: On, BEF: Off, Input pin Rg = 15 kΩ, CCIR/ARM filter Sub-buffer filter characteristic *5 GVOP2 Ripple filter block Ripple rejection factor RR VRPF VCC = 1.0 V, IRFO = 15 mA 0.89 0.94 V VREF VCC = 1.0 V 0.68 0.76 0.83 V Music detection level 1 VBS Power mute on, at V37 = 0.6 V[p-0] −50.6 −49 −47.4 dBV Music detection level 2 VMS Power mute off, at V37 = 0.6 V[p-0] −66.6 −65 −63.4 dBV 0.4 V 0.75 V 16 45 µA 0.3 V 1.05 V DC output voltage Bias block DC output voltage AMS block Control block Standby-off voltage VSTOFF Low: Power on Standby-on voltage VSTON High/open: Power off Standby pin current ISTBY V13 = 0 V Power mute-on threshold VMTON Low: Power mute on Power mute-off threshold VMTOFF High/open: Power mute off Power mute pin current ISW12 V12 = 0.1 V 20 40 µA FWD/REV/pre-mute low threshold VTH1L Low: REV 0.1 V FWD/REV/pre-mute high threshold VTH1H High: Pre-mute on 1.1 V FWD/REV/pre-mute pin current ISW1 V1 = 0.1 V 9 18 µA Low-boost on threshold VLBON Low: Low boost on 0.3 V Low-boost pin current ISW11 V11 = 0.1 V 20 40 µA Low: N.R. on 0.4 V 0.8 V N.R. on threshold VNRON N.R. off threshold VNROFF High/open : N.R. off Note) *3: Measuring point: SB out *4: Measuring point: N.R. out *5: Attenuation amount referred to sub-buffer off (measuring point: SB out). 6 ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Control block (continued) ISW2 V2 = 0.1 V 8 16 µA Sub-buffer on threshold VSBON Low: SB on 0.4 V Sub-buffer off threshold VSBOFF High/open: SB off 0.8 V 20 40 µA N.R. pin current Sub-buffer pin current ISW10 V10 = 0.1 V ■ Terminal Equivalent Circuits Pin No. Equivalent circuit 1 Description VRPF 120 kΩ 1 120 kΩ FWD/REV/pre-mute: FWD/REV/pre-mute control Pre-mute High voltage: VCC− 0.1 < V1-19 FWD Pin open REV Low voltage: V1-19 < 0.1 Waveform/voltage (at VCC = 1.2 V) GND 2 VRPF Approx. 2 µA 2 200 Ω 100 kΩ 100 kΩ 100 kΩ N.R. cont.: N.R. on/off control N.R. off Pin open or high voltage: 0.8 V < V2-19 < VCC +0.3 V N.R. on Low voltage: − 0.3 V < V2-19 < 0.4 V RIN = 33 kΩ 0.8 V GND 3 34 VRPF VREF Pin 3 34 Pin 3: N.R. in (R) Pin 34: N.R. in (L): N.R. decoder input 30 kΩ RIN = 30 kΩ (typ.) DC 0.78 V 50 kΩ GND 7 AN7500FHQ ICs for Radio-Cassette, Cassette Deck ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit 4 33 Description VRPF VREF Waveform/voltage (at VCC = 1.2 V) Pin 4: N.R. out (R) Pin 33: N.R. out (L): N.R. decoder output RO = 300 Ω (typ.) DC 0.78 V Pin 5: SC in (R) Pin 32: SC in (L): Side chain input RIN: Variable according to inpuit signal DC 0.78 V Pin 6: WAMP (R) Pin 31: WAMP (L): Weighting amp. filter pin DC 0.78 V Pin 7: VC LPF (R) 0V Pin 30: VC LPF (L): (Add external resistor Control voltage ripple filter pin without signal) 6.7 kΩ Pin 4 33 11.6 kΩ 7.5 kΩ GND 5 32 VRPF VREF Pin 5 32 200 Ω EVR GND 6 31 VREF VRPF Pin 6 270 Ω 31 GND 7 VRPF 30 Pin 7 30 GND 8 ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit 8 29 VREF Description VRPF 100 kΩ Pin 8 29 160 Ω Waveform/voltage (at VCC = 1.2 V) Pin 8: SB out (R) Pin 29: SB out (L): Sub-buffer amp. output When pin 10 is open or of high voltage and output is connected to VREF with 100 kΩ, the buffer amp. does not operate. At SB on RO = 160 Ω (typ.) At SB off RIN = 100 kΩ (typ.) DC 0.78 V Pin 9: SB in (R) Pin 28: SB in (L): Sub-buffer amp. input RIN = 86 kΩ (typ.) DC 0.78 V SB CNT: Sub-buffer amp. on/off control SB off Pin open or high voltage: 0.8 V < V10-19 < VCC +0.3 V SB on Low voltage: − 0.3 V < V10-19 < 0.4 V RIN = 6 kΩ DC 0.78 V L-BST CNT: DC 0 V GND 9 28 VRPF VREF 86 kΩ Pin 9 28 GND 10 VRPF 50 kΩ 10 20 kΩ 20 kΩ 20 kΩ GND 11 VRPF 50 kΩ 11 10 kΩ 50 kΩ Low boost on/off control L-BST on Pin open L-BST off Low voltage: − 0.3 V < V10-19 < 0.3 V GND 9 AN7500FHQ ICs for Radio-Cassette, Cassette Deck ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description 12 VRPF 50 kΩ 12 50 kΩ Waveform/voltage (at VCC = 1.2 V) PWR mute CNT: Power mute on/off control PWR-mute off Pin open or high voltage: VCC − 0.15 V < V12-19 < VCC +0.3 V PWR-mute on Low voltage: − 0.3 V < V12-19 < 0.3 V DC 0 V STBY CNT: Standby on/off control STBY off Pin open or high voltage: 0.75 V < V13-19 < VCC +0.3 V STBY (on state) on Low voltage: − 0.3 V < V13-19 < 0.4 V DC 0 V RF in: Ripple filter reference voltage input DC 1.0 V RF base: DC 0.47 V GND 13 VRPF 100 kΩ 13 100 kΩ GND 14 VCC 70 kΩ 14 14 kΩ 100 kΩ 15 350 kΩ Ripple filter GND 16 15 VRPF : Ripple filter reference voltage output 16 10 DC 1.13 V ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit 17 Description VRPF Waveform/voltage (at VCC = 1.2 V) AGC TAU: AGC time constant 17 GND 18 21 VCC 60 kΩ Pin 18: PWR out (L) Pin 21: PWR out (R): Power amp. voltage output Pin 18 21 DC 0.6 V 4 kΩ GND 19 20 22 VRPF GND pin 0V VCC power supply pin 1.2 V L-BST C: Low boost capacitor pin 15 kΩ 7.5 kΩ 22 7.5 kΩ DC 0.78 V 15 kΩ VREF GND 23 VRPF LPF2-C: LPF2 capacitor pin 45 kΩ 15 kΩ 23 7.5 kΩ DC 0.78 V VREF GND 11 AN7500FHQ ICs for Radio-Cassette, Cassette Deck ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description 24 VRPF 3 kΩ 24 Waveform/voltage (at VCC = 1.2 V) L-BST C1: Low boost capacitor pin 30 kΩ 30 kΩ DC 0.78 V 3 kΩ VREF GND 25 27 VRPF 25 12 kΩ 90 kΩ 10 kΩ VREF Pin 25: PWR in (R) Pin 27: PWR in (L): Power amp. input DC 0.78 V AC −30 dBm 2 kΩ VREF GND VRPF 90 kΩ 26 LPF1-C: 27 LPF capacitor pin 10 kΩ GND VRPF DC 0.78 V 26 GND 35 VRPF IREF : Reference current resistor pin 35 GND 12 DC 0.1 V ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description 36 VRPF 10 kΩ MS LPF-C: Music interval detection LPF capacitor pin Waveform/voltage (at VCC = 1.2 V) 36 5.7 kΩ GND 37 MS out: VCC Music interval detection output 37 400 kΩ GND 38 VRPF 180 kΩ MS-C: Music interval detection filter capacitor pin DC 0.78 V 180 kΩ 38 180 kΩ 180 kΩ VREF GND 13 AN7500FHQ ICs for Radio-Cassette, Cassette Deck ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit 39 47 Description Waveform/voltage (at VCC = 1.2 V) Pin 39: PB out (L) Pin 47: PB out (R): Playback amp. output VCC Pin 39 47 DC 0.6 V AC −30 dBm GND 40 46 Pin 40: PB NF (L) Pin 46: PB NF (R): Playback amp. negative feedback input VCC Pin 40 46 DC 0.78 V 1 kHz −65 dBm GND 41 45 Pin 41: REV in (L) Pin 45: REV in (R): Playback amp. REV input DC 0.78 V AC −65 dBm VCC 42 44 Pin 42: FWD in (L) Pin 44: FWD in (R): Playback amp. FWD input 200 kΩ Pin 41 42 44 45 25 kΩ VREF 14 GND ICs for Radio-Cassette, Cassette Deck AN7500FHQ ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description 43 VRPF Waveform/voltage (at VCC = 1.2 V) VREF : Reference voltage output DC 0.78 V VREF in: Reference voltage input DC 0.78 V 43 GND 48 VRPF 48 GND 15 AN7500FHQ ICs for Radio-Cassette, Cassette Deck 1 µF PB out (L) 0.022 µF 6.8 kΩ 180 Ω 33 µF REV in (L) 1 µF FWD in (L) 1 µF VREF 22 µF PWR in (R) 25 26 1 µF 0.1 µF PWR in (L) 27 28 29 30 2 700 pF 160 Ω 37 0.047 µF 1 µF 0.01 2.2 kΩ µF 390 kΩ 0.33 µF 15 kΩ 0.01 µF 31 32 1 µF SB out (L) N.R. out (L) 3 300 pF 33 34 35 36 10 kΩ 1 µF IREF N.R. in (L) ■ Application Circuit Example 38 100 kΩ VREF VREF 39 23 0.15 µF 22 40 25 kΩ 21 200 kΩ 20 42 19 43 18 Bias 32 Ω PWR out (R) VCC GND PWR out (L) 100 µF 2.2 Ω 32 Ω 17 0.1 µF 0.047 µF 16 AGC Ripple filter 200 kΩ 6.8 kΩ VREF VREF 47 22 µF 15 14 2SB1295 33 µF 100 kΩ 86 kΩ 12 On Power mute On On Off 11 10 Off Off On SB out (R) N.R. out (R) 2.2 kΩ ASC 2 700 pF 8 0.01 µF 390 kΩ 7 0.33 µF 15 kΩ 6 1 µF 5 3 300 pF 1 µF N.R. in (R) On 1 µF Off FWD REV 0.01 µF 4 3 2 1 Mute 9 160 Ω N.R. FWD REV On Off mute 13 Control Off 48 2.2 µF Low BST 1 µF VCC 2.2 Ω 100 µF 41 45 25 kΩ 1 µF 33 µF 46 0.022 µF PB out (R) 6.8 µF 0.1 µF 44 Note) Dolby and double D logos are the trademarks of Dolby Laboratories Licensing Corporation. The use of this product requires the prior approval of Dolby Laboratories Licensing Corporation. 16 6.8 µF 1 µF FWD in (R) REV in (R) 180 Ω 24 86 kΩ STBY