MB88346B-P Fujitsu Microelectronics, Inc., MB88346B-P Datasheet

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MB88346B-P

Manufacturer Part Number
MB88346B-P
Description
R-2r Type 8-bit D/A Converter With op Amp Output Buffers
Manufacturer
Fujitsu Microelectronics, Inc.
Datasheet
FUJITSU SEMICONDUCTOR
LINEAR IC
R-2R TYPE 8-BIT D/A CONVERTER WITH
OPERATIONAL AMPLIFIER OUTPUT BUFFERS
MB88346B
The Fujitsu MB88346B is an R-2R type 8-bit resolution digital-to-analog
converter (DAC), designed for interface with a wide range of general 4-
bit and 8-bit microcontrollers including Fujitsu’s MB88200 family,
MB8850 family, and MB88500 family 4-bit single-chip microcontrollers.
The MB88346B has an 8-bit x 12-channel D/A converter with operational
amplifier output buffers. Digital data are input serially by individual chan-
nel units. The loaded digital data are converted into analog DC voltages
by the D/A converter in 20 s settling time. Also, the MB88346B has
operational amplifier output buffers. These operational amplifier output
buffers are connected to each channel of the D/A converter, and provide
high current drive capability. The MB88346B is suitable for electronic
volumes and replacement for potentiometers for adjustment, in addition
to normal D/A converter applications.
DESCRIPTION
FEATURES
• Conversion method : R-2R resistor ladder
• 8-bit x 12-channel D/A converter with operational amplifier output
• Max. 2.5MHz Serial data input
• Serial data output for cascade connection
• Max. 20 s DAC output settling time
• Max. +1.0/-1.0 mA analog output sink/source current
• Two separate power supply/ground lines for MCU interface block/
• Pin compatible with MB88341
• Single +5V power supply
• Wide operating temperature range: -20 C to +85 C
• Silicon-gate CMOS process
• Three package options :
DATA SHEET
buffers
operational amplifier
20-pin plastic DIP (Suffix : -P), 20-pin plastic SOP (Suffix : -PF),
20-pin plastic SSOP(Suffix : -PFV)
output buffer block and D/A converter block
This device contains circuitry to protect the inputs against damage
due to high static voltages or electric fields. However, it is advised
that normal precautions be taken to avoid application of any voltage
higher than maximum rated voltages to this high impedance circuit.
MB88346B-PFV
MB88346B-P
PLASTIC SSOP
(FPT-20P-M03)
MB88346B-PF
PLASTIC SOP
(FPT-20P-M01)
PLASTIC DIP
(DIP-20P-M02)
DS04-13501-2E
1

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MB88346B-P Summary of contents

Page 1

... MB88346B-P PLASTIC DIP (DIP-20P-M02) MB88346B-PF PLASTIC SOP (FPT-20P-M01) MB88346B-PFV PLASTIC SSOP (FPT-20P-M03) This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields. However advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. ...

Page 2

... AO8 AO8 AO9 AO9 8 AO12 12 AO10 AO10 9 AO11 Vcc DD DD Figure 1 Logic Symbol +5V +5V 12 Vcc V DD MB88346B GND Vss MB88346B-PFV 1 GND 20 2 AO2 19 3 AO1 CLK 16 (Top View AO12 13 9 AO11 12 10 Vcc ...

Page 3

... AO1 Digital Block (MCU Interface) 12-bit Shift Register 4-bit Address Decoder 8-bit Data Latch R-2R Type 8-bit D/A Converter * : Only for D/A converter block except operational amplifier block MB88346B GND DO D10 D11 #12 # AO12 Vss* 3 ...

Page 4

... MB88346B PIN DESCRIPTION PIN ASSIGNMENT and Tableshow the pin assignment and pin description of the MB88346B. Symbol Pin No. Type Power Supply GND Control Input CLK Data Input/Output DAC Output AO1 18 AO2 19 AO3 ...

Page 5

... DEVICE CONFIGURATION As illustrated in BLOCK DIAGRAM, the MB88346B device is composed by the digital block (MCU interface) and analog block (D/A converter with operational amplifier output buffers). The digital block consists of a 12-bit shift register, a 4-bit address decoder, and 12-channels of 8-bit data latches. The analog block includes 12 channels of 8-bit D/A converters with operational amplifier output buffers connecting to the data latches ...

Page 6

... MB88346B (Last-In) LSB Address 1H Data Latch #1 2H Data Latch #2 3H Data Latch #3 4H Data Latch #4 5H Data Latch #5 6H Data Latch #6 7H Data Latch #7 8H Data Latch #8 9H Data Latch #9 AH Data Latch #10 BH Data Latch #11 CH Data Latch #12 ...

Page 7

... Figure 5 Configuration of R-2R Resistor Ladder D/A Converter Powered/grounded by the V and GND pins Internal Bias Generator * (Common to ch. #1-ch. #12 Operational Amplifier Output Buffer* MB88346B + AOx - 7 ...

Page 8

... V Data Latch Selected MB88346B Deselected Data Latch #1 Data Latch #2 Data Latch #3 Data Latch #4 Data Latch #5 Data Latch #6 Data Latch #7 Data Latch #8 Data Latch #9 Data Latch #10 Data Latch #11 Data Latch #12 Deselected Deselected Deselected DAC Output Level ...

Page 9

... Figure 6 Cascade Connection Example +5V MB88346B Vcc DATA DI (SO) CLOCK CLK Microcontroller (SC/TO) Strobe LD GND GND * : MB88346B can be used mixed with MB88341 MB88341 CLK LD Vss GND Vss MB88346B V DD MB88346B DI DO CLK LD GND ...

Page 10

... MB88346B APPLICATION DESCRIPTION The MB88346B is suitable for electronic volumes and replacement for adjustment potentiometers, in addition to normal D/A converter applica- tions. Figure 7 illustrates application example for a gain control. +5V Vcc I/O port I/O port Microcontroller I/O port I/O port GND 10 Figure 7 Application Example - Gain Control Input Vcc V DD ...

Page 11

... Value Symbol Min Typ V 4.5 5.0 CC GND - GND - -20 - MB88346B Unit Condition +25 C GND = Vcc +25 C GND = Unit Condition Max ...

Page 12

... MB88346B DC CHARACTERISTICS (Recommended operating conditions unless otherwise noted.) Digital Block (MCU Interface) Parameter Symbol Active Supply Current Input Leakage Current I ILK (CLK, DI, and LD) Input Low Voltage V IL (CLK, DI, and LD) Input High Voltage V IH (CLK, DI, and LD) Output Low Voltage V OL ...

Page 13

... bit Monotonicity -1.0 0 +1.0 LSB Unloaded, V Unloaded, V -1.5 0 +1.5 LSB See Figure 8. End point line Digita data #FF MB88346B Condition =V =5V, V =GND=0V =+1.0mA, Digital Data=#FF =V =5V, V =GND=0V =+1.0mA, Digital Data=#FF V -0.1V -0.1V, V 0.1V Nonlinearity error * : V is not always equal to V ...

Page 14

... MB88346B AC CHARACTERISTICS (Recommended operating conditions unless otherwise noted.) Parameter Symbol Clock Low Time Clock High Time Clock Rise Time Clock Fall Time Data Setup Time Data Hold Time Load Strobe High Time Load Strobe Setup Time Load Strobe Hold Time DAC Output Settling Time ...

Page 15

... Figure 10 Input/Output Timing CKH 0.8V CC CLK 0. CKL 0. 0. CHD DCH LD AOx Previous Data t cf 0.8V CC 0.2V CC 0. LDH t CHL 0. LDD Previous Data 0.8V CC New Data Valid 0.2V CC MB88346B 0. LDC 0.8V CC 0.2V CC 0.9V CC New Data Valid 0. ...

Page 16

... MB88346B Figure 11 Analog Output Voltage Range R-2R Ladder Output (D/A Converter Output Notes =GND SS 16 Operational Amplifier Output (Buffer Output AOH CC AO Output Range X (Linear Range) GND V = GND AOL ...

Page 17

... PACKAGE DIMENSIONS MB88346B-P 20 pin, Plastic DIP (DIP-20P-M02) INDEX-1 INDEX-2 4.36(.172)MAX 3.00(.118)MIN +0.30 0.86 –0 +.012 .034 –0 1.27(.050) 2.54(.100) MAX 1994 FUJITSU LIMITED D20003S-3C-4 C +0.20 24.64 –0.30 +.008 .970 –.012 6.20±0.25 (.244±.010) 0.51(.020)MIN 0.46±0.08 (.018±.003) +0.30 1.27 –0 +.012 .050 –0 TYP MB88346B 0.25± ...

Page 18

... MB88346B MB88346B-PF 20 pin, Plastic SOP (FPT 20P-M01) +0.25 12.70 –0.20 INDEX 1.27(.050) 0.45±0.10 TYP (.018±.004) "A" 0.10(.004) 11.43(.450)REF 1994 FUJITSU LIMITED F20003S-5C +.010 .500 –.008 5.30±0.30 7.80±0.40 (.209±.012) (.307±.016) Ø0.13(.005) M 2.25(.089)MAX 0.05(.002)MIN (STAND OFF) +0 ...

Page 19

... MB88346B-PFV 20 pin, Plastic SSOP (FPT-20P-M03) * 6.50±0.10(.256±.004) INDEX 0.65±0.12 (.0256±.0047) 5.85(.230)REF 1994 FUJITSU LIMITED F20012S-2C-4 C +0.20 1.25 –0.10 +.008 .049 –.004 * 4.40±0.10 6.40±0.20 5.40(.213) (.173±.004) (.252±.008) NOM "A" +0.10 +0.05 0.22 0.15 –0.05 –0.02 +.004 +.002 .009 .006 – ...

Page 20

... MB88346B FUJITSU LIMITED 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, ...

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