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FUJITSU SEMICONDUCTOR DATA SHEET
DS04-13508-2E
Linear IC Converter
CMOS
D/A Converter for Digital Tuning
(24-channel, 8-bit, on-chip OP amp)
MB88345
s 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.
s 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 VCC Two separate power supply/ground lines for MCU interface block/operational amplifier output buffer block and D/A converter block * Serial data input : maximum operating speed 2.5 MHz * CMOS process * * * * * *
s PACKAGE
32-pin Plastic QFP
(FPT-32P-M21)
MB88345
s PIN ASSIGNMENT
(TOP VIEW)
AO24 AO23 AO22 AO21 AO20 AO19 18 AO18 17 16 15 14 13 12 11 10 INDEX 2 3 4 5 6 7 9 8 DO 24 25 26 27 28 29 30 31 32 1
LD CLK DI GND VSS AO1 AO2 AO3
23
22
21
20
19
AO17 AO16 AO15 VCC VDD AO14 AO13 AO12
AO10
(FPT-32P-M21)
s PIN DESCRIPTION
Pin No. 27 24 26 25 Pin name DI* DO CLK* LD* I/O I O I I Description Serial data input pin. This pin inputs serial data with a data length of 14 bits. This pin outputs the MSB data in the 14-bit shift register. Shift clock input pin. The input signal from the DI pin enters the 14-bit shift register at the rising edge of the shift clock pulse. When the LD pin inputs the High-level signal, shift register value is loaded to the decoder and the D/A output register. 8-bit D/A output with OP-amp. MCU interface and OP-amp power-supply pin MCU interface and OP-amp GND pin D/A converter power-supply pin D/A converter GND pin
30 to 32 AO1 to AO3 1 to 11 AO4 to AO14 14 to 23 AO15 to AO24 13 28 12 29 VCC GND VDD VSS
O
* : DI, CLK, LD pins should be fixed with "Low"level while no data are transferred. 2
AO11
AO4
AO5
AO6
AO7
AO8
AO9
MB88345
s BLOCK DIAGRAM
DI CLK
14-bit shift register D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13
DO
Channel decoder 8
LD
24
1
24
1 8-bit register
2 8-bit register
24 8-bit register
R-2R type 8-bit D/A converter VCC GND + -
R-2R type 8-bit D/A converter
R-2R type 8-bit D/A converter VDD VSS
+ -
+ -
AO1
AO2
AO24
3
MB88345
s 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.
Last LSB D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D/A output bits Channel selection bits
First MSB D13
* D/A converter control signals Input data signal D0 0 1 ~ 0 1 D1 0 0 ~ 1 1 D2 0 0 ~ 1 1 D3 0 0 ~ 1 1 D4 0 0 ~ 1 1 D5 0 0 ~ 1 1 D6 0 0 ~ 1 1 D7 0 0 ~ 1 1
D/A converter output voltage = VSS : = VREF / 255 x 1 + VSS : ~ = VREF / 255 x 254 + VSS : = VDD : Channel selection
VREF = VDD - VSS * Channel selection signals Input data signal D8 x x x ~ x x x x ~ x x D9 0 0 0 ~ 1 1 1 1 ~ 1 1 D10 0 0 0 ~ 0 1 1 1 ~ 1 1 D11 0 0 0 ~ 1 0 0 0 ~ 1 1 D12 0 0 1 ~ 1 0 0 1 ~ 1 1 D13 0 1 0 ~ 1 0 1 0 Deselected ~ 0 1 Deselected AO1 Selection AO2 Selection AO23 Selection AO24 Selection ~
x : Don't Care
4
MB88345
s TIMING CHART
MSB LSB D12 D11 D10 D2 D1 D0
DI
D13
CLK
LD
D/A output
s ANALOG OUTPUT VOLTAGE RANGE
R-2R ladder output
VDD
OP amp. output
VCC VAOH (VCC)
D/A output range (linear area)
VAOL (GND) VSS VCC = VDD GND = VSS GND
5
MB88345
s ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage Input voltage Output voltage Power consumption Operating temperature Storage temperature * : VCC VDD 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. Symbol VCC VDD VIN VOUT PD Ta Tstg Based on GND Ta = +25 C Conditions Rating Min. -0.3 -0.3* -0.3 -0.3 -20 -55 Max. +7.0 +7.0* VCC + 0.3 VCC + 0.3 250 +85 +150 Unit V V V V mW C C
s RECOMMENDED OPERATING CONDITIONS
Parameter Power supply voltage 1 Power supply voltage 2 Analog output source current Analog output sink current Oscillation limit output capacity Digital data value range Operating temperature Symbol VCC GND VDD VSS IAL IAH COL Ta Conditions VDD - VSS 2.0 V Value 5 V 10 % 0 2.0 to VCC GND to VCC - 2.0 max. 1.0 max. 1.0 max. 1.0 #00 to #FF -20 to +85 Unit V V V V mA mA F C
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device's electrical characteristics are warranted when the device is operated within these ranges. Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand.
6
MB88345
s ELECTRICAL CHARACTERISTICS
1. DC Characteristics
(1) Digital block (VDD, VCC = +5 V 10% (VCC VDD) , GND, VSS = 0 V, Ta = -20 C to +85 C) Symbol VCC ICC IILK VIL VIH VOL VOH DO VCC Pin name Conditions Operation at CLK = 1 MHz (No load) VIN = 0 to VCC IOL = 2.5 mA IOH = -400 A Value Min. 4.5 -10 0.5 VCC VCC - 0.4 Typ. 5.0 2.4 Max. 5.5 5.4 10 0.2 VCC 0.4 Unit V mA A V V V V
Parameter Power supply voltage Power supply current Input leak current "L" level input voltage "H" level input voltage "L" level output voltage "H" level output voltage (2) Analog block (1)
CLK DI LD
(VDD, VCC = +5 V 10% (VCC VDD) , GND, VSS = 0 V, Ta = -20 C to +85 C) Symbol IDD VDD Pin name VDD VSS Conditions No load VDD - VSS 2.0 V AO1 to AO24 No load VDD VCC - 0.1V VSS 0.1 V Value Min. 2.0 GND -1.5 -1.0 Typ. 3.0 8 8 Max. 4.5 VCC VCC - 2.0 1.5 1.0 Unit mA V V bit bit LSB LSB
Parameter Power consumption Analog Voltage Resolution Monotonic increase Non-linearity error Differential linearity error
VSS Res Rem LE DLE
Nonlinearity error :
Differential linearity error :
Deviation (error) in input/ output curves with respect to an ideal straight line connecting output voltage at "00" and output voltage at "FF." Deviation (error) in amplification with respect to theoretical increase in amplification per 1-bit increase in digital value.
Ideal straigth line Analog output VAOH
Non linearity error VAOL Digital setting
#00
#FF
Note : The value of VAOH and VDD, and the value of VAOL and VSS are not necessarily equivalent.
7
MB88345
(3) Analog block (2) (VDD, VCC = +5 V 10% (VCC VDD) , GND, VSS = 0 V, Ta = -20 C to +85 C) Symbol Pin name Conditions VDD = VCC VSS = GND = 0 V IAL = 0 A Digital data = #00 VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 500 A Digital data = #00 VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 500 A Digital data = #00 VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 1.0 mA Digital data = #00 VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 1.0 mA Digital data = #00 VDD = VCC VSS = GND = 0 V IAL = 0 A Digital data = #FF VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 500 A Digital data = #FF VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 500 A Digital data = #FF VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 1.0 mA Digital data = #FF VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 1.0 mA Digital data = #FF Value Min. Typ. Max. VSS + 0.1 Unit
Parameter
Output minimum voltage 1
VAOL1
VSS
V
Output minimum voltage 2
VAOL2
VSS - 0.2
VSS
VSS + 0.2
V
Output minimum voltage 3
VAOL3
VSS
VSS + 0.2
V
Output minimum voltage 4
VAOL4
VSS - 0.3
VSS
VSS + 0.3
V
Output minimum voltage 5
VAOL5 AO1 to AO24
VSS
VSS + 0.3
V
Output maximum voltage 1
VAOH1
VDD - 0.1
VDD
V
Output maximum voltage 2
VAOH2
VDD - 0.2
VDD
V
Output maximum voltage 3
VAOH3
VDD - 0.2
VDD
VDD + 0.2
V
Output maximum voltage 4
VAOH4
VDD - 0.3
VDD
V
Output maximum voltage 5
VAOH5
VDD - 0.3
VDD
VDD + 0.3
V
8
MB88345
2. AC Characteristics
(VDD, VCC = +5 V 10% (VCC VDD) , GND, VSS = 0 V, Ta = -20 C to +85 C) Symbol tCKL tCKH tCr tCf tDCH tCHD tCHL tLDC tLDH tDO tLDD See "Load conditions (1) " See "Load conditions (2) " Conditions Value Min. 200 200 30 60 200 100 100 Max. 200 150 100 Unit ns ns ns ns ns ns ns ns ns s
Parameter "L" level clock pulse width "H" level clock pulse width Clock rise time Clock fall time Data setup time Data hold time Load setup time Load hold time "H" level load pulse width Data output delay time D/A output setting time
* Load conditions
(1)
Measurement point CL = 20 pF to 100 pF
(2) RAL = 10 K
Measurement point CAL = 50 pF
9
MB88345
* Input/output timing
tCr
tCKH
tCf
CLK
tCKL
DI
tLDH tDCH tCHD
tLDC
LD
tCHL tLDD
D/A output
tDO tDO
0.9 VCC 0.1 VCC
DO input
Note : Digital input decision level : 50% and 20% of VCC. Digital output decision level : 80% and 20% of VCC. Analog output decision level : 90% and 10% of VCC.
10
MB88345
s VAO vs. IAO CHARACTERISTICS EXAMPLE
Ta = +25C MB88345 5.0 V VDD DI CLK LD VSS 5.0 V VCC AO1 to AO24 GND Source current Sink current
Pattern input
(mV) 5,000 4,980 4,960 4,940 4,920 4,900 4,880 4,860 4,840 4,820 4,800
#FF Setting
Analog output level
1.0
0.8
0.6 0.4 0.2 Sink current #80 Setting
0.0
0.2
0.4 0.6 0.8 Source current
1.0
(mA)
(mV) 2,600 2,580 2,560 2,540 2,520 2,500 2,480 2,460 2,440 2,420 2,400
Analog output level
1.0
0.8
0.6 0.4 0.2 Sink current #00 Setting
0.0
0.2
0.4 0.6 0.8 Source current
1.0
(mA)
(mV) 200 180 160 140 120 100 80 60 40 20 0 1.0 0.8
Analog output level
0.6 0.4 0.2 Sink current
0.0
0.2
0.4 0.6 0.8 Source current
1.0
(mA)
11
MB88345
s ORDERING INFORMATION
Part number MB88345PF Package 32 pin Plastic QFP (FPT-32P-M21) Remarks
12
MB88345
s PACKAGE DIMENSION
32-pin, Plastic QFP (FPT-32P-M21)
9.000.20(.354.008)SQ
24
7.000.10(.276.004)SQ
17
1.50 -0.10 .059 -.004
+0.20 +.008
25
16
5.60 (.220) REF 1 PIN INDEX
8.00 (.315) NOM
32
9
1
8
0.80(.0315)TYP
0.300.10 (.012.004)
"A" 0.16(.006)
M
0.127 -0.02 .005 -.001
+0.05 +.002
Details of "A" part 0.100.10 (.004.004)
0.10(.004)
0
10
0.500.20 (.020.008)
C
1994 FUJITSU LIMITED F32032S-1C-2
Dimensions in mm (inches)
13
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
All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information and circuit diagrams in this document are presented as examples of semiconductor device applications, and are not intended to be incorporated in devices for actual use. Also, FUJITSU is unable to assume responsibility for infringement of any patent rights or other rights of third parties arising from the use of this information or circuit diagrams. The contents of this document may not be reproduced or copied without the permission of FUJITSU LIMITED. FUJITSU semiconductor devices are intended for use in standard applications (computers, office automation and other office equipments, industrial, communications, and measurement equipments, personal or household devices, etc.). CAUTION: Customers considering the use of our products in special applications where failure or abnormal operation may directly affect human lives or cause physical injury or property damage, or where extremely high levels of reliability are demanded (such as aerospace systems, atomic energy controls, sea floor repeaters, vehicle operating controls, medical devices for life support, etc.) are requested to consult with FUJITSU sales representatives before such use. The company will not be responsible for damages arising from such use without prior approval. Any semiconductor devices have inherently a certain rate of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Control Law of Japan, the prior authorization by Japanese government should be required for export of those products from Japan.
http://www.fujitsu.co.jp/
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F0002 (c) FUJITSU LIMITED Printed in Japan

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