SANYO LA3235W Datasheet
Monolithic Linear IC
Ordering number : EN4530A
53096HA (OT) No. 4530-1/13
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
1.5 V Record Preamplifier
LA3235W
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
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
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.
Package Dimensions
unit: mm
6134A-SQFP48
SANYO: SQFP48
[LA3235W]
Specifications
Absolute Maximum Ratings at Ta = 25°C
Operating Conditions at Ta = 25°C
Operating Characteristics at Ta = 25°C, VCC1 and V
CCRF
= 1.2 V, VCC2 = 2.4 V, f = 1 kHz, 0 dBm = 0.775 V,
R
LMIC
= 10 kΩ, R
LRadio
= 10 kΩ, R
LMON
= 10 kΩ, R
LREC
= 3 kΩ
No. 4530-2/13
LA3235W
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
max 4.5 V
Allowable power dissipation Pd max 320 mW
Operating temperature Topr –10 to +65 °C
Storage temperature Tstg –40 to +125 °C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage
V
CC
1, V
CCRF
1.5 V
V
CC
2 2.4 V
Operating supply voltage range
V
CC
1, V
CCRF
0.9 to 2.2 V
V
CC
2 2.0 to 4.0 V
Parameter Symbol Conditions min typ max Unit
No signal supply current: record/V
CC
1 I
CCR1
Microphone Rg = 6.8 kΩ 0.08 0.13 0.23 mA
No signal supply current: record/V
CCRF
I
CCRR
Microphone Rg = 6.8 kΩ 2.0 3.5 5.0 mA
No signal supply current: record/V
CC
2 I
CCR2
Microphone Rg = 6.8 kΩ 0.85 1.5 2.1 mA
No signal supply current: playback/V
CC
1 I
CCP1
0.1 5.0 µA
No signal supply current: playback/V
CCRF
I
CCPR
0.36 0.6 1.0 mA
No signal supply current: playback/V
CC
2 I
CCP2
0.3 0.5 0.75 mA
[Microphone amplifier] (measured with ALC off)
Voltage gain (closed) VG
M
VO= –20 dBm 35 dB
Maximum output voltage V
O maxM
THD = 1% 320 mV
Total harmonic distortion THD
M
VO= 200 mV 0.1 %
Output noise voltage V
NOM
Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 130 µV
Crosstalk (interchannel) CT
M
VO= –20 dBm, TUNE 1 KHz 46 dB
Ripple rejection ratio SVRR
M
Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 37 dB
[Radio Amplifier] (measured with ALC off)
Voltage gain (closed) VG
R
VO= –20 dBm 14.5 dB
Maximum output voltage V
O maxR
THD = 1% 320 mV
Total harmonic distortion THD
R
VO= 200 mV 0.1 %
Output noise voltage V
NOR
Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 30 µV
Crosstalk (interchannel) CT
R
VO= –20 dBm, TUNE 1 KHz 59 dB
Ripple rejection ratio SVRR
R
Rg = 6.8 kΩ, fR = 100 Hz, VR = –30 dBm 55 dB
[Monitor Amplifier]
Voltage gain (closed) VG
MONVO
= –20 dBm 9.5 dB
Maximum output voltage V
OMON
THD = 1% 260 mV
Total harmonic distortion THD
MONVO
= 100 mV 0.1 %
Output noise voltage V
NOMON
BPF = 20 Hz to 20 kHz 11 µV
Crosstalk (interchannel) CT
MONVO
= –20 dBm 59 dB
Ripple rejection ratio SVRR
MONfR
= 100 Hz, VR = –30 dBm 57 dB
[Record Amplifier]
Voltage gain (closed) VG
RECVO
= –10 dBm 22 dB
Maximum output voltage V
OREC
THD = 1% 670 mV
Total harmonic distortion THD
RECVO
= 300 mV 0.08 %
Output noise voltage V
NOREC
BPF = 20 Hz to 20 kHz 46 µV
Crosstalk (interchannel) CT
RECVO
= –10 dBm 55 dB
Ripple rejection ratio SVRR
RECfR
= 100 Hz, VR = –30 dBm 55 dB
Continued on next page.
Continued form preceding page.
No. 4530-3/13
LA3235W
Parameter Symbol Conditions min typ max Unit
[Microphone + Record]
Voltage gain (closed) VG
MR
VO= –10 dBm, ALC OFF 52 56.6 60 dB
Maximum output voltage V
OMR
THD = 3% 500 700 mV
Total harmonic distortion THD
MR
Vi = –40 dBm 0.55 1.3 %
ALC voltage ALCV
MR
Vi = –40 dBm, Rg = 6.8 kΩ 300 400 500 mV
ALC balance ALCB
MR
Vi = –40 dBm, Rg = 6.8 kΩ 0 1.5 dB
ALC start input ALCI
MR
–65.5 –62.5 –59.5 dBm
ALC width ALCW
MR
Input level relative to the ALC start point such
35 42 dB
that the output is +3 dB.
Output noise voltage V
NOMR
Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 1.5 2.8 mV
Crosstalk (interchannel) CT
MR
Vi = –40 dBm 11 19 dB
SVRR
MR1
Rg = 6.8 kΩ, fR= 100 Hz, VR = –30 dBm 10 16 dB
Ripple rejection ratio
SVRR
MR2
Rg = 6.8 kΩ, fR= 100 Hz, VR = –20 dBm
50 58 dB
With ripple added to V
CC
2, TUNE = 100 Hz
[Radio + Record]
Voltage gain VG
RR
VO= –10 dBm, ALC OFF 31.5 35.5 39.5 dB
Maximum output voltage V
ORR
THD = 3% 470 570 mV
Total harmonic distortion THD
RR
Vi = –30 dBm 0.55 1.3 %
ALC voltage ALCV
RR
Vi = –30 dBm, Rg = 6.8 kΩ 300 410 500 mV
ALC balance ALCB
RR
Vi = –30 dBm, Rg = 6.8 kΩ 0 1.5 dB
ALC start input ALCI
RR
–45.5 –42.5 –39.5 dBm
ALC width ALCW
RR
Input level relative to the ALC
35 40 dB
start point such that the output is +3 dB.
Output noise voltage V
NORR
Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 340 610 µV
Crosstalk (interchannel) CT
RR
Vi = –30 dBm 35 47 dB
Ripple rejection ratio SVRR
RR
Rg = 6.8 kΩ, fR= 100 Hz, VR = –30 dBm 25 32 dB
[Microphone + Monitor]
Voltage gain (closed) VG
MMONVO
= –20 dBm, ALC OFF 39.5 43.5 47.5 dB
Maximum output voltage V
OMMON
THD = 3% 150 310 mV
Total harmonic distortion THD
MMON
Vi = –40 dBm 0.55 1.3 %
ALC voltage ALCV
MMON
Vi = –40 dB, Rg = 6.8 kΩ 60 90 135 mV
Output noise voltage V
NOMMON
Rg = 6.8 kΩ, BPF = 20 Hz to 20 kHz 350 650 µV
Crosstalk (interchannel) CT
MMON
Vi = –40 dBm 11 19 dB
SVRR
MMON
Rg = 6.8 kΩ, fR= 100 Hz, VR = –30 dBm 21 27 dB
Ripple rejection ratio
SVRR
MMON
Rg = 6.8 kΩ, fR= 100 Hz, VR = –20 dBm
60 70 dB
With ripple added to V
CC
2, TUNE = 100 Hz
[Record Bias Power Supply]
Output voltage V
RBR1IRBR
= –50 mA 0.92 1.0 1.08 V
Ripple rejection ratio SVRR
RBR1
fR = 100 Hz, VR = –30 mA
45 53 dB
I
RBR
= –50 mA, 2SB1295; using 6 ranks
Output voltage V
RBR2
VCC1 = 1.0 V, I
RBR
= 30 mA 0.89 0.93 V
Ripple rejection ratio SVRR
RBR2
VCC1 = 1.0 V, fR = 100 Hz, VR = –30 dBm
33 40 dB
I
RBR
= 30 mA, 2SB1295; using 6 ranks
[Microphone Power Supply]
Output voltage V
MR
I
MR
= 3 mA 1.55 1.65 1.75 V
Ripple rejection ratio SVRR
MR
fR = 100 Hz, VR = –20 dBm
55 70 dB
I
MR
= 3 mA, with ripple added to VCC2
[Switching Control]: Record mode
Forward: CONT A and C pins: source I
FA
, I
FC
Measured with RL= 10 kΩ 20 35 µA
Forward: CONT B pin sink V
FB
I
IN
= 100 µA 64 150 mV
Forward: CONT D pin sink V
FD
I
IN
= 500 µA 110 230 mV
Reverse: CONT B and D pins source I
RB
, I
RD
Measured with RL= 10 kΩ 20 35 µA
Reverse: CONT A pin sink V
RA
I
IN
= 100 µA 64 150 mV
Reverse: CONT C pin sink V
RC
I
IN
= 500 µA 110 230 mV
CONT E pin sink V
E
I
IN
= 100 µA 30 70 mV
Continued on next page.
Continued form preceding page.
Switching Control Block: Operating Mode Table
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 V
CCRF
voltage.
No. 4530-4/13
LA3235W
Parameter Symbol Conditions min typ max Unit
[Switching Control]: Playback mode
CONT C and D pins source I
PC
, I
PD
Measured with RL= 10 kΩ 20 35 µA
CONT E pin source I
E
Measured with RL= 10 kΩ 10 18 µA
CONT A and B pins sink V
PA, VPBIIN
= 100 µA 64 150 mV
Radio CONT F pin sink V
RF
IIN= 100 µA 64 150 mV
Microphone CONT F pin V
MF
Vi = –40 dBm, Rg = 6.8 kΩ 1.1 1.2 V
Item A*
1
B*
1
C*
1
D*
1
E*
1
F*
2
REC/MIC/RADIO
FWD H L H L L L
REV L H L H L L
PLAY
MIC L L H H H H
RADIO L L H H H L
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