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 ■ 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 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 ■ PACKAGE 32-pin Plastic QFP (FPT-32P-M21) MB88345 ■ PIN ASSIGNMENT AO21 AO20 AO19 AO18 CLK AO22 24 25 AO23 LD AO24 DO (TOP VIEW) 23 22 21 20 19 18 17 16 AO17 26 15 AO16 DI 27 14 AO15 GND 28 13 VCC VSS 29 12 VDD AO1 30 11 AO14 AO2 31 10 AO13 AO3 32 9 AO12 3 4 5 6 AO5 AO6 AO7 AO8 AO9 7 8 AO11 2 AO10 1 AO4 INDEX (FPT-32P-M21) ■ PIN DESCRIPTION Pin No. Pin name I/O Description 27 DI* I Serial data input pin. This pin inputs serial data with a data length of 14 bits. 24 DO O This pin outputs the MSB data in the 14-bit shift register. 26 CLK* I 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. 25 LD* I When the LD pin inputs the High-level signal, shift register value is loaded to the decoder and the D/A output register. O 8-bit D/A output with OP-amp. 30 to 32 AO1 to AO3 1 to 11 AO4 to AO14 14 to 23 AO15 to AO24 13 VCC MCU interface and OP-amp power-supply pin 28 GND MCU interface and OP-amp GND pin 12 VDD D/A converter power-supply pin 29 VSS D/A converter GND pin * : DI, CLK, LD pins should be fixed with “Low”level while no data are transferred. 2 MB88345 ■ BLOCK DIAGRAM DI CLK DO 14-bit shift register D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 Channel decoder 8 24 1 LD 1 2 24 24 8-bit register 8-bit register 8-bit register R-2R type 8-bit D/A converter R-2R type 8-bit D/A converter R-2R type 8-bit D/A converter VCC VDD GND VSS + − + − AO1 + − AO2 AO24 3 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. Last LSB First MSB D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D/A output bits D10 D11 D/A converter output voltage 0 0 0 0 0 0 0 =: VSS 1 0 0 0 0 0 0 0 =: VREF / 255 × 1 + VSS ~ 0 ~ D7 ~ D6 ~ D5 ~ D4 ~ D3 ~ D2 ~ D1 ~ D0 0 1 1 1 1 1 1 1 =: VREF / 255 × 254 + VSS 1 1 1 1 1 1 1 1 =: VDD VREF = VDD − VSS • Channel selection signals Input data signal Channel selection 0 0 0 0 0 Deselected × 0 0 0 0 1 AO1 Selection × 0 0 0 1 0 AO2 Selection 1 AO23 Selection × 1 1 0 0 0 AO24 Selection × 1 1 0 0 1 × 1 1 0 1 0 ~ 1 ~ 1 ~ 0 ~ 1 ~ × ~ ~ × ~ D13 ~ D12 ~ D11 ~ D10 ~ D9 ~ D8 × 1 1 1 1 0 × 1 1 1 1 1 × : Don’t Care D13 Channel selection bits • D/A converter control signals Input data signal 4 D12 Deselected MB88345 ■ TIMING CHART MSB DI D13 LSB D12 D11 D10 D2 D1 D0 CLK LD D/A output ■ ANALOG OUTPUT VOLTAGE RANGE R-2R ladder output OP amp. output VDD VCC VAOH (VCC) D/A output range (linear area) VAOL (GND) VSS GND VCC = VDD GND = VSS 5 MB88345 ■ ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Conditions Unit Min. Max. −0.3 +7.0 V −0.3* +7.0* V −0.3 VCC + 0.3 V VOUT −0.3 VCC + 0.3 V Power consumption PD 250 mW Operating temperature Ta −20 +85 °C −55 +150 °C VCC Power supply voltage VDD Input voltage Output voltage Based on GND Ta = +25 °C VIN Storage temperature Tstg * : 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. ■ RECOMMENDED OPERATING CONDITIONS Parameter Power supply voltage 1 Power supply voltage 2 Symbol VCC GND VDD VSS Conditions VDD − VSS ≥ 2.0 V Value Unit 5 V ± 10 % V 0 V 2.0 to VCC V GND to VCC − 2.0 V Analog output source current IAL max. 1.0 mA Analog output sink current IAH max. 1.0 mA Oscillation limit output capacity COL max. 1.0 µF Digital data value range #00 to #FF Operating temperature Ta −20 to +85 °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 ■ ELECTRICAL CHARACTERISTICS 1. DC Characteristics (1) Digital block Symbol Power supply voltage VCC Power supply current ICC Input leak current IILK “L” level input voltage VIL “H” level input voltage VIH “L” level output voltage VOL “H” level output voltage VOH (2) Analog block (1) Parameter Power consumption Resolution Monotonic increase Symbol IDD VSS Rem LE Differential linearity error DLE Differential linearity error : CLK DI LD Typ. Max. 4.5 5.0 5.5 V Operation at CLK = 1 MHz (No load) 2.4 5.4 mA −10 10 µA 0.2 VCC V 0.5 VCC V 0.4 V VCC − 0.4 V VIN = 0 to VCC IOL = 2.5 mA DO Unit Min. IOH = −400 µA Pin name VDD VSS Value Conditions No load VDD − VSS ≥ 2.0 V Res Non-linearity error Nonlinearity error : VCC Value Conditions (VDD, VCC = +5 V ± 10% (VCC ≥ VDD) , GND, VSS = 0 V, Ta = −20 °C to +85 °C) VDD Analog Voltage Pin name AO1 to AO24 No load VDD ≤ VCC − 0.1V VSS ≥ 0.1 V 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. Unit Min. Typ. Max. 3.0 4.5 mA 2.0 VCC V GND VCC − 2.0 V 8 bit 8 bit −1.5 1.5 LSB −1.0 1.0 LSB Ideal straigth line Analog output Parameter (VDD, VCC = +5 V ± 10% (VCC ≥ VDD) , GND, VSS = 0 V, Ta = −20 °C to +85 °C) VAOH Non linearity error VAOL #00 #FF Digital setting Note : The value of VAOH and VDD, and the value of VAOL and VSS are not necessarily equivalent. 7 MB88345 (3) Analog block (2) Parameter Output minimum voltage 1 Output minimum voltage 2 Output minimum voltage 3 Output minimum voltage 4 Output minimum voltage 5 (VDD, VCC = +5 V ± 10% (VCC ≥ VDD) , GND, VSS = 0 V, Ta = −20 °C to +85 °C) Symbol Pin name Output maximum voltage 2 Output maximum voltage 3 Output maximum voltage 4 Output maximum voltage 5 8 Value Unit Min. Typ. Max. VAOL1 VDD = VCC VSS = GND = 0 V IAL = 0 µA Digital data = #00 VSS VSS + 0.1 V VAOL2 VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 500 µA Digital data = #00 VSS − 0.2 VSS VSS + 0.2 V VAOL3 VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 500 µA Digital data = #00 VSS VSS + 0.2 V VAOL4 VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 1.0 mA Digital data = #00 VSS − 0.3 VSS VSS + 0.3 V VAOL5 VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 1.0 mA Digital data = #00 VSS VSS + 0.3 V VAOH1 VDD = VCC VSS = GND = 0 V IAL = 0 µA Digital data = #FF VDD − 0.1 VDD V VAOH2 VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 500 µA Digital data = #FF VDD − 0.2 VDD V VAOH3 VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 500 µA Digital data = #FF VDD − 0.2 VDD VDD + 0.2 V VAOH4 VDD = VCC = 5.0 V VSS = GND = 0 V IAL = 1.0 mA Digital data = #FF VDD − 0.3 VDD V VAOH5 VDD = VCC = 5.0 V VSS = GND = 0 V IAH = 1.0 mA Digital data = #FF VDD − 0.3 VDD VDD + 0.3 V AO1 to AO24 Output maximum voltage 1 Conditions MB88345 2. AC Characteristics Parameter (VDD, VCC = +5 V ± 10% (VCC ≥ VDD) , GND, VSS = 0 V, Ta = −20 °C to +85 °C) Symbol Conditions Value Min. Max. Unit “L” level clock pulse width tCKL 200 ns “H” level clock pulse width tCKH 200 ns Clock rise time Clock fall time tCr tCf 200 ns Data setup time tDCH 30 ns Data hold time tCHD 60 ns Load setup time tCHL 200 ns Load hold time tLDC 100 ns “H” level load pulse width tLDH 100 ns Data output delay time tDO See “Load conditions (1) ” 150 ns D/A output setting time tLDD See “Load conditions (2) ” 100 µs • Load conditions (1) Measurement point CL = 20 pF to 100 pF (2) RAL = 10 KΩ Measurement point CAL = 50 pF 9 MB88345 • Input/output timing tCr tCKH tCf CLK tCKL DI tLDC tLDH tDCH tCHD LD tCHL tLDD 0.9 VCC 0.1 VCC D/A output tDO 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 tDO MB88345 ■ VAO vs. IAO CHARACTERISTICS EXAMPLE Ta = +25°C MB88345 VDD DI CLK LD VSS Analog output level Analog output level Analog output level 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 (mV) 2,600 2,580 2,560 2,540 2,520 2,500 2,480 2,460 2,440 2,420 2,400 5.0 V 5.0 V Source current Sink current VCC AO1 to AO24 GND #FF Setting 1.0 0.8 0.6 0.4 0.2 Sink current 0.0 0.2 0.4 0.6 0.8 Source current 1.0 (mA) 0.0 0.2 0.4 0.6 0.8 Source current 1.0 (mA) 0.0 0.2 0.4 0.6 0.8 Source current 1.0 (mA) #80 Setting 1.0 0.8 (mV) 200 180 160 140 120 100 80 60 40 20 0 0.6 0.4 0.2 Sink current #00 Setting 1.0 0.8 0.6 0.4 0.2 Sink current 11 MB88345 ■ ORDERING INFORMATION Part number MB88345PF 12 Package 32 pin Plastic QFP (FPT-32P-M21) Remarks MB88345 ■ PACKAGE DIMENSION 32-pin, Plastic QFP (FPT-32P-M21) 9.00±0.20(.354±.008)SQ 24 17 7.00±0.10(.276±.004)SQ +0.20 1.50 –0.10 +.008 .059 –.004 25 16 5.60 (.220) REF 8.00 (.315) NOM 1 PIN INDEX 32 9 1 0.80(.0315)TYP 8 0.30±0.10 (.012±.004) 0.10(.004) C "A" 0.16(.006) M +0.05 0.127 –0.02 Details of "A" part +.002 .005 –.001 0.10±0.10 (.004±.004) 0 10° 0.50±0.20 (.020±.008) 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 http://www.fujitsu.co.jp/ North and South America FUJITSU MICROELECTRONICS, INC. 3545 North First Street, San Jose, CA 95134-1804, USA Tel: +1-408-922-9000 Fax: +1-408-922-9179 Customer Response Center Mon. - Fri.: 7 am - 5 pm (PST) Tel: +1-800-866-8608 Fax: +1-408-922-9179 http://www.fujitsumicro.com/ Europe FUJITSU MICROELECTRONICS EUROPE GmbH Am Siebenstein 6-10, D-63303 Dreieich-Buchschlag, Germany Tel: +49-6103-690-0 Fax: +49-6103-690-122 http://www.fujitsu-fme.com/ Asia Pacific FUJITSU MICROELECTRONICS ASIA PTE LTD #05-08, 151 Lorong Chuan, New Tech Park, Singapore 556741 Tel: +65-281-0770 Fax: +65-281-0220 http://www.fmap.com.sg/ F0002 FUJITSU LIMITED Printed in Japan All Rights Reserved. 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