Ordering number : EN4530A Monolithic Linear IC LA3235W 1.5 V Record Preamplifier Overview Package Dimensions The LA3235W is a single-chip record system IC for use in 1.5 V headphone stereo products. While previous recording systems were implemented using a dedicated tape drive, by using the LA3235W, such a system can be implemented by adding electronic switching to a playback-only tape drive. Additionally, a compact record/playback system can be implemented with just two chips by combining this IC and the LA4590W 1.5 V preamplifier/power amplifier IC unit: mm 6134A-SQFP48 [LA3235W] Functions Microphone amplifier (with ALC) ×2 Microphone monitor amplifier ×2 Radio amplifier (with ALC) × 2 Record bias power supply Record amplifier ×4 (with forward/reverse switching and muting functions) • Microphone power supply • All control circuits, including electronic switching circuits, built in • • • • • SANYO: SQFP48 Features • • • • Miniature package (48-pin SQFP) Built-in microphone and record bias power supplies Built-in radio amplifier with ALC circuit Systems can be easily controlled from a microprocessor using the built-in electronic switching, power supply, and amplifier block control circuits. SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 53096HA (OT) No. 4530-1/13 LA3235W Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage Allowable power dissipation Conditions Ratings Unit VCC max 4.5 V Pd max 320 mW Operating temperature Topr –10 to +65 °C Storage temperature Tstg –40 to +125 °C Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage Operating supply voltage range Conditions Ratings Unit VCC1, VCCRF 1.5 V VCC2 2.4 V VCC1, VCCRF 0.9 to 2.2 V VCC2 2.0 to 4.0 V Operating Characteristics at Ta = 25°C, VCC1 and VCCRF = 1.2 V, VCC2 = 2.4 V, f = 1 kHz, 0 dBm = 0.775 V, RLMIC = 10 kΩ, RLRadio = 10 kΩ, RLMON = 10 kΩ, RLREC = 3 kΩ Parameter Symbol Conditions min typ max Unit No signal supply current: record/VCC1 ICCR1 Microphone Rg = 6.8 kΩ 0.08 0.13 0.23 mA No signal supply current: record/VCCRF ICCRR Microphone Rg = 6.8 kΩ 2.0 3.5 5.0 mA No signal supply current: record/VCC2 ICCR2 Microphone Rg = 6.8 kΩ 0.85 No signal supply current: playback/VCC1 ICCP1 No signal supply current: playback/VCCRF ICCPR No signal supply current: playback/VCC2 ICCP2 1.5 2.1 mA 0.1 5.0 µA 0.36 0.6 1.0 mA 0.3 0.5 0.75 mA [Microphone amplifier] (measured with ALC off) Voltage gain (closed) VGM VO = –20 dBm 35 dB 320 mV Maximum output voltage VO maxM Total harmonic distortion THDM VO = 200 mV 0.1 % Output noise voltage VNOM Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 130 µV VO = –20 dBm, TUNE 1 KHz 46 dB Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 37 dB Crosstalk (interchannel) Ripple rejection ratio CTM SVRRM THD = 1% [Radio Amplifier] (measured with ALC off) Voltage gain (closed) VGR VO = –20 dBm 14.5 dB THD = 1% 320 mV THDR VO = 200 mV 0.1 % VNOR Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 30 µV VO = –20 dBm, TUNE 1 KHz 59 dB SVRRR Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 55 dB Maximum output voltage VO maxR Total harmonic distortion Output noise voltage Crosstalk (interchannel) Ripple rejection ratio CTR [Monitor Amplifier] Voltage gain (closed) VGMON VO = –20 dBm 9.5 dB Maximum output voltage VOMON THD = 1% 260 mV Total harmonic distortion THDMON VO = 100 mV 0.1 % Output noise voltage VNOMON BPF = 20 Hz to 20 kHz 11 µV VO = –20 dBm 59 dB fR = 100 Hz, VR = –30 dBm 57 dB Crosstalk (interchannel) Ripple rejection ratio CTMON SVRRMON [Record Amplifier] Voltage gain (closed) VGREC VO = –10 dBm 22 dB Maximum output voltage VOREC THD = 1% 670 mV Total harmonic distortion THDREC VO = 300 mV 0.08 % Output noise voltage VNOREC BPF = 20 Hz to 20 kHz 46 µV VO = –10 dBm 55 dB fR = 100 Hz, VR = –30 dBm 55 dB Crosstalk (interchannel) Ripple rejection ratio CTREC SVRRREC Continued on next page. No. 4530-2/13 LA3235W Continued form preceding page. Parameter Symbol Conditions min typ max Unit [Microphone + Record] Voltage gain (closed) VGMR VO = –10 dBm, ALC OFF Maximum output voltage VOMR THD = 3% Total harmonic distortion THDMR Vi = –40 dBm ALC voltage ALCVMR Vi = –40 dBm, Rg = 6.8 kΩ ALC balance ALCBMR Vi = –40 dBm, Rg = 6.8 kΩ ALC start input ALCIMR ALC width Output noise voltage Crosstalk (interchannel) Ripple rejection ratio ALCWMR VNOMR CTMR Input level relative to the ALC start point such that the output is +3 dB. 52 56.6 500 700 60 dB mV 0.55 1.3 400 500 mV 0 1.5 dB –65.5 –62.5 –59.5 35 42 300 Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 1.5 % dBm dB 2.8 mV Vi = –40 dBm 11 19 dB SVRRMR1 Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 10 16 dB SVRRMR2 Rg = 6.8 kΩ, fR = 100 Hz, VR = –20 dBm With ripple added to VCC2, TUNE = 100 Hz 50 58 dB [Radio + Record] Voltage gain VGRR VO = –10 dBm, ALC OFF 31.5 35.5 Maximum output voltage VORR THD = 3% 470 570 Total harmonic distortion THDRR Vi = –30 dBm ALC voltage ALCVRR Vi = –30 dBm, Rg = 6.8 kΩ ALC balance ALCBRR Vi = –30 dBm, Rg = 6.8 kΩ ALC start input ALCIRR ALC width Output noise voltage Crosstalk (interchannel) ALCWRR VNORR CTRR Input level relative to the ALC start point such that the output is +3 dB. 39.5 dB mV 0.55 1.3 410 500 mV 0 1.5 dB –45.5 –42.5 –39.5 35 40 300 Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 340 % dBm dB 610 µV Vi = –30 dBm 35 47 dB SVRRRR Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 25 32 dB Voltage gain (closed) VGMMON VO = –20 dBm, ALC OFF 39.5 43.5 Maximum output voltage VOMMON THD = 3% 150 310 Ripple rejection ratio [Microphone + Monitor] Total harmonic distortion THDMMON ALC voltage ALCVMMON Vi = –40 dB, Rg = 6.8 kΩ Output noise voltage Crosstalk (interchannel) Ripple rejection ratio VNOMMON CTMMON Vi = –40 dBm 60 Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz Vi = –40 dBm 47.5 dB mV 0.55 1.3 % 90 135 mV 350 650 µV 11 19 dB SVRRMMON Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 21 27 dB Rg = 6.8 kΩ, fR = 100 Hz, VR = –20 dBm SVRRMMON With ripple added to VCC2, TUNE = 100 Hz 60 70 dB 0.92 1.0 45 53 0.89 0.93 33 40 [Record Bias Power Supply] Output voltage Ripple rejection ratio Output voltage Ripple rejection ratio VRBR1 SVRRRBR1 VRBR2 SVRRRBR2 IRBR = –50 mA fR = 100 Hz, VR = –30 mA IRBR = –50 mA, 2SB1295; using 6 ranks VCC1 = 1.0 V, IRBR = 30 mA VCC1 = 1.0 V, fR = 100 Hz, VR = –30 dBm IRBR = 30 mA, 2SB1295; using 6 ranks 1.08 V dB V dB [Microphone Power Supply] Output voltage Ripple rejection ratio VMR SVRRMR IMR = 3 mA 1.55 1.65 fR = 100 Hz, VR = –20 dBm IMR = 3 mA, with ripple added to VCC2 55 70 Measured with RL = 10 kΩ 20 35 1.75 V dB [Switching Control]: Record mode Forward: CONT A and C pins: source IFA, IFC µA Forward: CONT B pin sink VFB IIN = 100 µA 64 150 Forward: CONT D pin sink VFD IIN = 500 µA 110 230 Reverse: CONT B and D pins source IRB, IRD Measured with RL = 10 kΩ 20 35 mV mV µA Reverse: CONT A pin sink VRA IIN = 100 µA 64 150 mV Reverse: CONT C pin sink VRC IIN = 500 µA 110 230 mV VE IIN = 100 µA 30 70 mV CONT E pin sink Continued on next page. No. 4530-3/13 LA3235W Continued form preceding page. Parameter Symbol Conditions min typ IPC, IPD Measured with RL = 10 kΩ 20 35 IE Measured with RL = 10 kΩ 10 18 max Unit [Switching Control]: Playback mode CONT C and D pins source CONT E pin source µA µA CONT A and B pins sink VPA, VPB IIN = 100 µA 64 150 Radio CONT F pin sink VRF IIN = 100 µA 64 150 Microphone CONT F pin VMF Vi = –40 dBm, Rg = 6.8 kΩ 1.1 1.2 mV mV V Switching Control Block: Operating Mode Table A*1 Item REC/MIC/RADIO PLAY B*1 C*1 D*1 E*1 F*2 FWD H L H L L L REV L H L H L L MIC L L H H H H RADIO L L H H H L Note: 1. The high-level voltage for A, B, C, D, and E is close to the VCC2 voltage. 2. The high-level voltage for F is close to the VCCRF voltage. No. 4530-4/13 LA3235W Block Diagram No. 4530-5/13 LA3235W Test Circuit Diagram No. 4530-6/13 LA3235W Application Circuit Example 1 No. 4530-7/13 LA3235W Application Circuit Example 2: Circuit using the LA4590W No. 4530-8/13 LA3235W Pin Functions : The indicated pin voltages are for VCC1 and RF = 1.2 V and VCC2 = 2.4 V. Pin No. Pin 2 MIC REGULATOR REF 3 MIC REGULATOR Pin voltage (V) Internal equivalent circuit Notes 1.4 • Microphone power supply reference bias low-pass filter connection 1.65 • Microphone power supply output • Always on in record mode 4 REC BIAS REGULATOR REF 1.0 • Record bias power supply reference bias low-pass filter connection • The value of the capacitor connected to this pin determines the SVRR. 5 REC BIAS REGULATOR 1.0 • Record bias power supply output • Always on in record mode 6 OSC 0.5 • Oscillation connection suppression capacitor Continued on next page. No. 4530-9/13 LA3235W Continued form preceding page. Pin No. 7 10 Pin BASE ALC Pin voltage (V) 0.55 0.7 Internal equivalent circuit Notes • External pnp transistor base drive connection • Microphone and radio ALC rectifier connection • The external resistor and capacitor connected to this pin determine the ALC attack and recovery times. • Record amplifier and microphone monitor amplifier inputs • A buzz reduction capacitor is incorporated in these pin circuits. • The input resistance is 10 kΩ. 14 15 REC IN2 REC IN1 0.8 16 17 MIC OUT1 IMC OUT2 0.8 • Microphone and radio amplifier outputs 18 21 RADIO IN2 RADIO IN1 0.8 • Radio amplifier inputs • The input resistance is variable over the range 6.8 to 36.8 kΩ. Continued on next page. No. 4530-10/13 LA3235W Continued form preceding page. Pin No. Pin Pin voltage (V) Internal equivalent circuit Notes 19 22 NF2 NF1 0.8 • Microphone and radio amplifier noise filter connections 20 23 MIC IN2 MIC IN1 0.8 • Microphone amplifier inputs • The input resistance is variable over the range 6.8 to 36.8 kΩ. 26 27 28 CONT E CONT D CONT C VCC2 to 0 29 30 31 CONT B CONT A CONT F • Fixed-current pull-up current sources Pin 26......................18 µA Pins 27 and 28........35 µA VCC2 to 0 • 35-µA fixed-current pull-up current sources VCCRF to 0 • The pull-up resistor has a value of 100 kΩ ±20%. Continued on next page. No. 4530-11/13 LA3235W Continued form preceding page. Pin No. Pin 32 REC/PLAY SW 33 FWD/REV SW 34 MIC/RADIO SW 35 REC MUTE SW 38 REF Pin voltage (V) Internal equivalent circuit Notes VCCRF to 0 • Sets the system to record mode when pulled down and to playback mode when open. Record mode condition: V32 ≤ 0.1 V 0.7 to 0 • Output source current I33 ≈ 4 µA • Sets the system to reverse mode when pulled down. Reverse mode condition: V33 ≤ 0.4 V 0.7 to 0 • Output source current I34 ≈ 8 µA • Sets the system to radio mode when pulled down. Radio mode condition: V34 ≤ 0.4 V VCCRF to 0 • Output source current I35 ≈ 13 µA • Sets the system to muted mode when pulled down. Muted mode condition: V35 ≤ 0.1 V 0.8 • V REF amplifier reference bias low-pass filter connection Continued on next page. No. 4530-12/13 LA3235W Continued form preceding page. Pin No. 39 41 42 43 44 Pin VREF REC1 REV REC2 REV REC2 FWD REC1 FWD 46 47 MIC MONITOR 1 MIC MONITOR 2 Pin voltage (V) 0.8 1.0 0.8 Internal equivalent circuit Notes • VREF amplifier output • Virtual ground bias for all amplifier blocks • The V REF amplifier makes this a lowimpedance circuit. • Record amplifier outputs • The output impedance in playback mode is 195 kΩ ±20%. • Microphone monitor amplifier output ■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. ■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of May, 1996. Specifications and information herein are subject to change without notice. No. 4530-13/13