MITSUBISHI <STD. LINEAR ICs>
S
t
r
SCLSDAG
2
M62332P/FP
M62337P/FP
8-BIT 2CH I2C BU S D -A CONVERTER WITH BUFFER A MPLIFIER
DESCRIPTION
The M62332/M62337 is an integrated circui
semiconductor of CMOS structure with 2 channels of built
in D-A converters with output buffer operational amplifiers.
The input is 2-wires serial method is used for the transfer
format of digital data to allow connection with a
microcomputer with minimum wiring.
The output buffer operational amplifier employs AB class
output circuit with sync and source drive capacity of 1.0mA
or more,and it operates in the whole voltage range from
Vcc to ground.
The M62332 and the M62337 differ only in their slave
address.
FEATURES
• Digital data transfer format
2
I
C BUS serial data method
• Output buffer operational amplifier
it operates in the whole voltage range from Vcc to
ground.
• High output current drive capacity
±1.0mA over
APPLICATION
Conversion from digital data to analog control data fo
home-use and industrial equipment.
Signal gain control or automatic adjustment of DISPLAYMONITOR or CTV.
PI N CONFIGURATION(T OP V IEW)
1
Ao1
2
Ao
3
N.C.
4
Outline 8P4 (P)
M62337
8
Vcc
M62332
7
6
5
8P2S-A (FP)
N.C.:NO CONNECTION
NDN.C.
BLOCK DIA GRAM
Vcc
8 7 6 5
POWER ON
RESET
SCL SDA GND
I2C BUS TRANSCEIVER
CHANNEL
DECODER
8
8bit Latch
8bit upper
segment R-2R
8bit Latch
8bit upper
segment R-2R
1
Ao1
2
Ao2
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EXPLANATION OF TERMINALS
Buffer amplifier
output inpedance
Pin No.
6
7
1
2
8
5
Symbol Function
SDA
SCL
Ao1
Ao2
Vcc
GND
Serial data input terminal
Serial clock input terminal
8-bit resolution D-A converter output terminal
Power supply terminal
GND terminal
ABSOLUTE MAXIMUM RATING
MITSUBISHI <STD. LINEAR ICs>
M62332P/F
M62337P/F
8-BIT 2CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIER
Symbol
Vcc
Vin
Vo
Pd
Topr
Tstg
Parameter Conditions
Supply voltage
Input voltage
Output voltage
Power dissipation
Operating temperature
Storage temperature
Ratings
–0.3 to 7.0
–0.3 to Vcc+0.3
–0.3 to Vcc+0.3
417 (DIP) / 272 (FP)
–20 to 85
–55 to 125
Unit
V
V
V
mW
°C
°C
ELECTRICAL CHARACTERISTICS (Vcc=+5V±10%,GND=0V,Ta=–20 to 85°C unless otherwise noted)
Symbol
Icc
IILK
VIL
VIH
VAO
IAO
SDL
SL
SZERO
SFULL
Parameter Test conditions
Suplly voltage
Supply current
Input leak current
Input low voltage
Input high voltage
Buffer amplifier output
voltage range
Buffer amplifier output
drive range
Differential nonlinearity
Nonlinearity
Zero code error
Full scale error
MIN TYP MAX
CLK=500kHz Operation, IAO=0µA
Data : 6Ah (at maximum current )
SDA=SCL=GND,IAO=0µA
VIN=0 to Vcc
IAO=±100µA 0.1
IAO=±500µA
Upper side saturation voltage=0.3V
Lower side saturation voltage=0.2V
VCC=5.12V(20mV/LSB)
without load (IAO=0)
–10 10
0.8VCC
–1.0 1.0 mA
–1.0 1.0
–1.5 1.5
–2.0 2.0
–2.0 2.0
Ratings
0 mA
0
0.2 V
0.6
0.4
2.5
0.2VCC V
VCC-0.1
VCC-0.2
Unit
LSB
LSB
LSB
LSB
VVcc 2.7 5.0 5.5
mA1.6
µA
V
V
Output capacitative load
Co
Ro
MITSUBISHI ELECTRIC
5.0
0.1
µF
Ω
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I2C BUS LINE CHARACTERISTICS
MITSUBISHI <STD. LINEAR ICs>
M62332P/F
M62337P/F
8-BIT 2CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIER
Symbol
fSCL
tBUF
tHD:STA
tLOW
tHIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
tF
tSU:STO
SCL clock frequency
Time the bus must be free before a new transmission can start
Hold time START Condition. After this period,the first clock pulse is generated. 4.0 - µ s
LOW period of the clock 4.7 - µ s
HIGh period of the clock 4.0 - µ s
Set-up time for START condition (Only relevant for a repeated START
condition)
Hold time DATA 0 - µ s
Set-up time DATA 250 - ns
Rise time of both SDA and SCL lines - 1000 ns
Fall time of both SDA and SCL lines - 300 ns
Set-up time for STOP condition 4.0 - µ s
Parameter
Min. Max.
0 100 KHz
4.7 - µs
4.7 - µ s
• Note that a transmitter must internally provide at least a hold time to bridge the undefined region
(max.300 ns) of the falling edge of SCL.
units
TIMING CHART
VIH
SDA
VIL
tHD:STA tSU:STA
VIH
SCL
VIL
START START STOP
tR, tF
tSU:DAT
tLOW tHIGH
tHD:DAT
tBUF
tSU:STO
START
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MITSUBISHI <STD. LINEAR ICs>
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M62332P/F
M62337P/F
8-BIT 2CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIER
I2C BUS FORMAT
STA SLAVE ADDRESS W A SUB ADDRESS A DAC DATA A STP
STA: start condition
W: write(SDA=Low)
• SLAVE ADDRESS
M62332
First
1 0 0 1 1 1 0
• SUB ADDRESSS
First
X X X S0X X X X
Don't care
• DAC DATA
First
MSB
Last
CHANNEL
SELECT
DATA
A: affirmation bit
STP: stop condition
M62337
First
1 0 0 1 1 0 1
Last
Last
LSB
CHANNEL SELECT DATA
S0
0
1
Channel selection
ch1 selection
ch2 selection
Last
D2 D1 D0D3D4D5D6D7
First Last
MSB LSB
D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0
1
0
0 0 0 0 0 0 1 1
: :: :: :: :
1 1 1 1 1 1 1 0
1 1 1 1 1 1 1
1
MITSUBISHI ELECTRIC
DAC output
Vcc/256 x 1
Vcc/256 x 2
Vcc/256 x 3
Vcc/256 x 4
:
Vcc/256 x 255
Vcc
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TIMING CHART (MODEL)
•start condition to slave address bite
MITSUBISHI <STD. LINEAR ICs>
M62332P/F
M62337P/F
8-BIT 2CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIER
SDA
SCL
D/A
output
start condition
•sub address bite
SDA
1 2
SCL
D/A
output
•DAC data bite to stop condition
SDA
1 2 A3 4 5 6 7 8
SCL
1 2
3
3 4 5
4 5 6 7 W
6 7 8
A
A
D/A
output
With SCL at HIGH,SDA line goes from HIGH to LOW•Start condition
With SCL at HIGH,SDA line goes from LOW to HIGH •Stop condition
(Under normal circumstances,SDA is changed when SCL is LOW)
•Acknowledge bit The receiving IC has to pull down SDA line whenever receive slave data.
(The transmitting IC releases the SDA line just then transmit 8bit data.)
Digital Data Formats
STA
SUB ADDRESS 2
SLAVE ADDRESS
A
DAC DATA 2
W
A
SUB ADDRESS 1
A
A
SUB ADDRESS n
DAC DATA 1
A DAC DATA n A
stop condition
A
STP
MITSUBISHI ELECTRIC
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MITSUBISHI <STD. LINEAR ICs>
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P
M62332P/F
M62337P/F
8-BIT 2CH I2C BUS D-A CONVERTER WITH BUFFER AMPLIFIER
PRECAUTION FOR USE
Supply voltage terminal(Vcc) is also used for D-A converter upper reference
voltage setting. IF ripple or spike is input this terminal,accuracy of D-A conversion
is down. So,when use this device,please connect capacitor among Vcc to GND
for stable D-A conversion.
This IC's output amplifier has an advantage to capacitive load.So it's no problem
at device action when connect capacitor (0.1µ F MAX) among output to GND for
every noise eliminate.
APPLICATION EXAMPLE
8
VCC1
SCL
SDA
GND
10µF 5V
5V
7
MCU
6
5
Analog output
terminals
Ao1
2
Ao2
3
4
Notes regarding I2C BUS
• Purchase of MITSUBISHI ELECTRIC CORPORATION'S I2C components conveys a license under the
Philips I2C Patent Rights to use these components an I2C system,provided that the system comforms to I2C
Standard Specification as defined by Philips.
Keep safety first in your circuit designs!
• Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and
more reliable, but there is always the possibility that trouble may occur with them. Trouble with
semiconductors may lead to personal injury,fire or property damage. Remember to give due consideration
to safety when making your circuit design, in order to prevent fires from spreading, redundancy, malfunction
or other mishap.
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