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Ordering number : EN4530A
Monolithic Linear IC
LA3235W
1.5 V Record Preamplifier
Overview
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
Package Dimensions
unit: mm 6134A-SQFP48
[LA3235W]
Functions
Microphone amplifier (with ALC) x2 Microphone monitor amplifier x2 Radio amplifier (with ALC) x 2 Record bias power supply Record amplifier x4 (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 = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ratings 4.5 320 -10 to +65 -40 to +125 Unit V mW C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Symbol VCC1, VCCRF VCC2 VCC1, VCCRF VCC2 Conditions Ratings 1.5 2.4 0.9 to 2.2 2.0 to 4.0 Unit V V V V
Operating supply voltage range
Operating Characteristics at Ta = 25C, VCC1 and VCCRF = 1.2 V, VCC2 = 2.4 V, f = 1 kHz, 0 dBm = 0.775 V, RLMIC = 10 k, RLRadio = 10 k, RLMON = 10 k, RLREC = 3 k
Parameter No signal supply current: record/VCC1 No signal supply current: record/VCCRF No signal supply current: record/VCC2 No signal supply current: playback/VCC1 No signal supply current: playback/VCCRF No signal supply current: playback/VCC2 [Microphone amplifier] (measured with ALC off) Voltage gain (closed) Maximum output voltage Total harmonic distortion Output noise voltage Crosstalk (interchannel) Ripple rejection ratio [Radio Amplifier] (measured with ALC off) Voltage gain (closed) Maximum output voltage Total harmonic distortion Output noise voltage Crosstalk (interchannel) Ripple rejection ratio [Monitor Amplifier] Voltage gain (closed) Maximum output voltage Total harmonic distortion Output noise voltage Crosstalk (interchannel) Ripple rejection ratio [Record Amplifier] Voltage gain (closed) Maximum output voltage Total harmonic distortion Output noise voltage Crosstalk (interchannel) Ripple rejection ratio VGREC VOREC THDREC VNOREC CTREC SVRRREC VO = -10 dBm THD = 1% VO = 300 mV BPF = 20 Hz to 20 kHz VO = -10 dBm fR = 100 Hz, VR = -30 dBm 22 670 0.08 46 55 55 dB mV % V dB dB VGMON VOMON THDMON VNOMON CTMON SVRRMON VO = -20 dBm THD = 1% VO = 100 mV BPF = 20 Hz to 20 kHz VO = -20 dBm fR = 100 Hz, VR = -30 dBm 9.5 260 0.1 11 59 57 dB mV % V dB dB VGR VO maxR THDR VNOR CTR SVRRR VO = -20 dBm THD = 1% VO = 200 mV Rg = 6.8 k, BPF = 20 Hz to 20 kHz VO = -20 dBm, TUNE 1 KHz Rg = 6.8 k, fR = 100 Hz, VR = -30 dBm 14.5 320 0.1 30 59 55 dB mV % V dB dB VGM VO maxM THDM VNOM CTM SVRRM VO = -20 dBm THD = 1% VO = 200 mV Rg = 6.8 k, BPF = 20 Hz to 20 kHz VO = -20 dBm, TUNE 1 KHz Rg = 6.8 k, fR = 100 Hz, VR = -30 dBm 35 320 0.1 130 46 37 dB mV % V dB dB Symbol ICCR1 ICCRR ICCR2 ICCP1 ICCPR ICCP2 0.36 0.3 Conditions Microphone Rg = 6.8 k Microphone Rg = 6.8 k Microphone Rg = 6.8 k min 0.08 2.0 0.85 typ 0.13 3.5 1.5 0.1 0.6 0.5 max 0.23 5.0 2.1 5.0 1.0 0.75 Unit mA mA mA A mA mA
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No. 4530-2/13
LA3235W
Continued form preceding page.
Parameter [Microphone + Record] Voltage gain (closed) Maximum output voltage Total harmonic distortion ALC voltage ALC balance ALC start input ALC width Output noise voltage Crosstalk (interchannel) VGMR VOMR THDMR ALCVMR ALCBMR ALCIMR ALCWMR VNOMR CTMR SVRRMR1 Ripple rejection ratio SVRRMR2 Input level relative to the ALC start point such that the output is +3 dB. Rg = 6.8 k, BPF = 20 Hz to 20 kHz Vi = -40 dBm Rg = 6.8 k, fR = 100 Hz, VR = -30 dBm Rg = 6.8 k, fR = 100 Hz, VR = -20 dBm With ripple added to VCC2, TUNE = 100 Hz VO = -10 dBm, ALC OFF THD = 3% Vi = -30 dBm Vi = -30 dBm, Rg = 6.8 k Vi = -30 dBm, Rg = 6.8 k -45.5 Input level relative to the ALC start point such that the output is +3 dB. Rg = 6.8 k, BPF = 20 Hz to 20 kHz Vi = -30 dBm Rg = 6.8 k, fR = 100 Hz, VR = -30 dBm VO = -20 dBm, ALC OFF THD = 3% Vi = -40 dBm 60 35 25 35 300 11 10 50 VO = -10 dBm, ALC OFF THD = 3% Vi = -40 dBm Vi = -40 dBm, Rg = 6.8 k Vi = -40 dBm, Rg = 6.8 k -65.5 35 300 52 500 56.6 700 0.55 400 0 -62.5 42 1.5 19 16 58 2.8 1.3 500 1.5 -59.5 60 dB mV % mV dB dBm dB mV dB dB dB Symbol Conditions min typ max Unit
[Radio + Record] Voltage gain Maximum output voltage Total harmonic distortion ALC voltage ALC balance ALC start input ALC width Output noise voltage Crosstalk (interchannel) Ripple rejection ratio [Microphone + Monitor] Voltage gain (closed) Maximum output voltage Total harmonic distortion ALC voltage Output noise voltage Crosstalk (interchannel) VGMMON VOMMON THDMMON VNOMMON CTMMON 39.5 150 43.5 310 0.55 90 350 11 21 60 19 27 70 1.3 135 650 47.5 dB mV % mV V dB dB dB VGRR VORR THDRR ALCVRR ALCBRR ALCIRR ALCWRR VNORR CTRR SVRRRR 31.5 470 35.5 570 0.55 410 0 -42.5 40 340 47 32 610 1.3 500 1.5 -39.5 39.5 dB mV % mV dB dBm dB V dB dB
ALCVMMON Vi = -40 dB, Rg = 6.8 k Rg = 6.8 k, BPF = 20 Hz to 20 kHz Vi = -40 dBm
SVRRMMON Rg = 6.8 k, fR = 100 Hz, VR = -30 dBm Ripple rejection ratio Rg = 6.8 k, fR = 100 Hz, VR = -20 dBm SVRRMMON With ripple added to VCC2, TUNE = 100 Hz 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 IMR = 3 mA fR = 100 Hz, VR = -20 dBm IMR = 3 mA, with ripple added to VCC2 Measured with RL = 10 k IIN = 100 A IIN = 500 A Measured with RL = 10 k IIN = 100 A IIN = 500 A IIN = 100 A
[Record Bias Power Supply] Output voltage Ripple rejection ratio Output voltage Ripple rejection ratio [Microphone Power Supply] Output voltage Ripple rejection ratio [Switching Control]: Record mode Forward: CONT A and C pins: source Forward: CONT B pin sink Forward: CONT D pin sink Reverse: CONT B and D pins source Reverse: CONT A pin sink Reverse: CONT C pin sink CONT E pin sink IFA, IFC VFB VFD IRB, IRD VRA VRC VE 20 35 64 110 20 35 64 110 30 150 230 70 150 230 A mV mV A mV mV mV VMR SVRRMR 1.55 55 1.65 70 1.75 V dB 0.92 45 0.89 33 1.0 53 0.93 40 1.08 V dB V dB
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LA3235W
Continued form preceding page.
Parameter [Switching Control]: Playback mode CONT C and D pins source CONT E pin source CONT A and B pins sink Radio CONT F pin sink Microphone CONT F pin IPC, IPD IE VPA, VPB VRF VMF Measured with RL = 10 k Measured with RL = 10 k IIN = 100 A IIN = 100 A Vi = -40 dBm, Rg = 6.8 k 1.1 20 10 35 18 64 64 1.2 150 150 A A mV mV V Symbol Conditions min typ max Unit
Switching Control Block: Operating Mode Table
Item REC/MIC/RADIO FWD REV MIC RADIO A*1 H L L L B*1 L H L L C*1 H L H H D*1 L H H H E*1 L L H H F*2 L L H L
PLAY
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 Pin voltage (V) Internal equivalent circuit Notes
2
MIC REGULATOR REF
1.4
* Microphone power supply reference bias low-pass filter connection
3
MIC REGULATOR
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
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No. 4530-9/13
LA3235W
Continued form preceding page.
Pin No.
Pin
Pin voltage (V)
Internal equivalent circuit
Notes
7
BASE
0.55
* External pnp transistor base drive connection
10
ALC
0.7
* Microphone and radio ALC rectifier connection * The external resistor and capacitor connected to this pin determine the ALC attack and recovery times.
14 15
REC IN2 REC IN1
0.8
* Record amplifier and microphone monitor amplifier inputs * A buzz reduction capacitor is incorporated in these pin circuits. * The input resistance is 10 k.
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 k.
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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 k.
26 27 28
CONT E CONT D CONT C
VCC2 to 0
* Fixed-current pull-up current sources Pin 26......................18 A Pins 27 and 28........35 A
29 30
CONT B CONT A
VCC2 to 0
* 35-A fixed-current pull-up current sources
31
CONT F
VCCRF to 0
* The pull-up resistor has a value of 100 k 20%.
Continued on next page.
No. 4530-11/13
LA3235W
Continued form preceding page.
Pin No.
Pin
Pin voltage (V)
Internal equivalent circuit
Notes
32
REC/PLAY SW
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
33
FWD/REV SW
0.7 to 0
* Output source current I33 4 A * Sets the system to reverse mode when pulled down. Reverse mode condition: V33 0.4 V
34
MIC/RADIO SW
0.7 to 0
* Output source current I34 8 A * Sets the system to radio mode when pulled down. Radio mode condition: V34 0.4 V
35
REC MUTE SW
VCCRF to 0
* Output source current I35 13 A * Sets the system to muted mode when pulled down. Muted mode condition: V35 0.1 V
38
REF
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.
Pin
Pin voltage (V)
Internal equivalent circuit
Notes
39
VREF
0.8
* VREF amplifier output * Virtual ground bias for all amplifier blocks * The V REF amplifier makes this a lowimpedance circuit.
41 42 43 44
REC1 REV REC2 REV REC2 FWD REC1 FWD
1.0
* Record amplifier outputs * The output impedance in playback mode is 195 k 20%.
46 47
MIC MONITOR 1 MIC MONITOR 2
0.8
* Microphone monitor amplifier output
s 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. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: 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: 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. s 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

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