MB88345 Fujitsu, MB88345 Datasheet

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MB88345

Manufacturer Part Number
MB88345
Description
D/A Converter for Digital Tuning
Manufacturer
Fujitsu
Datasheet
FUJITSU SEMICONDUCTOR
Linear IC Converter
CMOS
D/A Converter for Digital Tuning
MB88345
(24-channel, 8-bit, on-chip OP amp)
DESCRIPTION
The MB88345 incorporates twenty-four 8-bit D/A converter modules.
It also contains an output amplifier, allowing driving at large current.
Since the inputs data in serial mode, it requires only three control lines for data input and can be cascaded.
The MB88345 is suitable for applications such as electronic volume controls and replacement of semi-fixed
resistors in tuning systems.
FEATURES
• Ultra-low power consumption (1.1 mW/ch : typical)
• Compact space-saving package (QFP-32)
• Contains 24-channel R-2R type 8-bit D/A converter
• On-chip analog output amps (sink current max. 1.0 mA, source current max. 1.0 mA)
• Analog output range : 0 V to V
• Two separate power supply/ground lines for MCU interface block/operational amplifier output buffer block and
• Serial data input : maximum operating speed 2.5 MHz
• CMOS process
PACKAGE
DATA SHEET
D/A converter block
CC
32-pin Plastic QFP
(FPT-32P-M21)
DS04-13508-2E

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MB88345 Summary of contents

Page 1

... It also contains an output amplifier, allowing driving at large current. Since the inputs data in serial mode, it requires only three control lines for data input and can be cascaded. The MB88345 is suitable for applications such as electronic volume controls and replacement of semi-fixed resistors in tuning systems. FEATURES • ...

Page 2

... MB88345 PIN ASSIGNMENT LD CLK DI GND V SS AO1 AO2 AO3 PIN DESCRIPTION Pin No. Pin name I CLK LD AO1 to AO3 AO4 to AO14 AO15 to AO24 GND DI, CLK, LD pins should be fixed with “Low”level while no data are transferred. ...

Page 3

... CLK 8-bit register R-2R type 8-bit D/A converter V CC GND AO1 14-bit shift register D10 D11 D12 D13 Channel decoder 8-bit register R-2R type 8-bit D/A converter AO2 MB88345 8-bit register R-2R type 8-bit D/A converter AO24 3 ...

Page 4

... MB88345 DATA CONFIGURATION The MB88345 has a 14-bit shift register for chip control. The 14-bit shift register must be used to set up data in the configuration shown below. Note : The data configuration has a total of 14 bits, six for channel selection and eight for D/A data output. ...

Page 5

... TIMING CHART MSB D13 D12 D11 DI CLK LD D/A output ANALOG OUTPUT VOLTAGE RANGE R-2R ladder output GND V SS D10 amp. output D/A output range (linear area) V AOL GND MB88345 LSB AOH (GND) 5 ...

Page 6

... MB88345 ABSOLUTE MAXIMUM RATINGS Parameter Symbol V CC Power supply voltage V DD Input voltage V IN Output voltage V OUT Power consumption P D Operating temperature Ta Storage temperature Tstg * : WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. ...

Page 7

... Conditions name No load 2 AO1 No load 0. AO24 V 0 AOH V AOL #00 Note : The value of V and V SS MB88345 Value Unit Min. Typ. Max. 4.5 5.0 5.5 V 2 ...

Page 8

... MB88345 (3) Analog block (2) Parameter Symbol Pin name Output minimum V AOL1 voltage 1 Output minimum V AOL2 voltage 2 Output minimum V AOL3 voltage 3 Output minimum V AOL4 voltage 4 Output minimum V AOL5 voltage 5 AO1 to AO24 Output maximum V AOH1 voltage 1 Output maximum V AOH2 voltage 2 Output maximum V AOH3 voltage 3 ...

Page 9

... DCH t CHD t CHL t LDC t LDH See “Load t DO conditions (1) ” See “Load t LDD conditions (2) ” ( 100 MB88345 Value Unit Min. Max. 200 ns 200 ns 200 200 ns 100 ns 100 ns 150 ns 100 ...

Page 10

... MB88345 • Input/output timing CLK DI LD D/A output DO input Note : Digital input decision level : 50% and 20 Digital output decision level : 80% and 20 Analog output decision level : 90% and 10 CKH Cf t CKL t t DCH CHD t CHL LDC ...

Page 11

... Setting 200 180 160 140 120 100 1.0 0 5.0 V 5.0 V Source current V V Sink current AO1 CLK to LD AO24 V GND SS 0.6 0.4 0.2 0.0 0.2 0.4 0.6 Sink current Source current 0.6 0.4 0.2 0.0 0.2 0.4 0.6 Sink current Source current 0.6 0.4 0.2 0.0 0.2 0.4 0.6 Sink current Source current MB88345 0.8 1.0 (mA) 0.8 1.0 (mA) 0.8 1.0 (mA) 11 ...

Page 12

... MB88345 ORDERING INFORMATION Part number MB88345PF 12 Package 32 pin Plastic QFP (FPT-32P-M21) Remarks ...

Page 13

... FUJITSU LIMITED F32032S-1C +0.20 1.50 –0.10 +.008 .059 –.004 "A" +0.05 0.127 –0.02 0.16(.006) M +.002 .005 –.001 0.10(.004) MB88345 5.60 8.00 (.220) (.315) REF NOM Details of "A" part 0.10±0.10 (.004±.004) 0.50±0.20 0 10° (.020±.008) Dimensions in mm (inches) 13 ...

Page 14

... MB88345 FUJITSU LIMITED For further information please contact: Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices KAWASAKI PLANT, 4-1-1, Kamikodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa 211-8588, Japan Tel: +81-44-754-3763 Fax: +81-44-754-3329 http://www.fujitsu.co.jp/ North and South America FUJITSU MICROELECTRONICS, INC. 3545 North First Street, ...

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