DS04-13213-1E
FUJITSU SEMICONDUCTOR
DATA SHEET
Linear IC Converter
CMOS
D/A Converter for Digital Tuning
(Compatible with I
2
C Bus)
MB88141A
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DESCRIPTION
The FUJITSU MB88141A is an 8-bit D/A converter with 12 built
-
in channels.
The 12 analog output channels have built-in OP Amps, providing large current drive capability.
Data input is compatible with I
2
C specifications, and is controlled by two control lines.
The built-in I/O expander function allows the MB88141A to be controlled by devices incompatible with I
2
C bus
specifications (provides conversion between I
2
C serial and 8- or 4-bit parallel I/O).
The MB88141A is ideal for replacing electronic knob or pre-set variable resistance tuning devices.
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FEATURES
Ultra-low power consumption (0.9 mW/channel Typ.)
Ultra-compact package
Built-in 12-channel R-2R type 8-bit D/A converter
Built-in analog output amplifier (maximum sink current 1.0 mA, maximum source current 1.0 mA)
Analog output range 0 V to V
CC
(Continued)
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PACKAGES
24-pin plastic DIP
24-pin plastic SOP
24-pin plastic SSOP
(DIP-24P-M02)
(FPT-24P-M01)
(FPT-24P-M03)
"Purchase of Fujitsu I
2
C components conveys a license under the Philips I
2
C Patent Rights to use these
components in an I
2
C system, provided that the system conforms to the I
2
C Standard Specification as defined
by Philips."
MB88141A
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(Continued)
5 V single power supply
Power supply/GND for MCU interface and OP Amp is separate from power supply/GND for D/A converter
Power supply for D/A converter is divided into two systems for V
DDI
/V
SSI
(AO1 to AO4) and V
DD2
/V
SS2
(AO5 to
AO12) , allowing separate level settings for each system
Compatible with serial data input, I
2
C specifications
Built-in I/O expander function (converts between I
2
C serial and 8-or 4-bit parallel)
CMOS process
Packages : DIP 24-pin, SOP 24-pin, SSOP 24-pin
MB88141A
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PIN DESCRIPTION
*1: The MOD and CS0-CS2 pins should be used with fixed level input.
*2: When using the I/O expander function together with the D/A converter function, take care that D/A converter
output precision is within a range that will not affect overall system operation.
Pin no.
Symbol
Circuit Type
I/O
Description
21
SDA
C
I/O
I
2
C bus data input/output pin (hysteresis input).
Outputs the acknowledge signal.
20
SCL
B
I
I
2
C bus shift clock input pin (hysteresis input) .
19
MOD
A
I
D/A converter and I/O expander mode switching pin. *
1,
*
2
Input "L" to operate as a D/A converter, "H" to operate as I/O
expander and D/A converter.
16
17
18
CS0
CS1
CS2
A
I
These pins set the lower 3 bits of the slave address. *
1
This allows up to eight MB88141A chips to be used on the same
bus line.
1
2
3
4
AO1
AO2
AO3
AO4
D
O
8-bit D/A outputs with OP Amp. *
2
5
6
7
8
9
10
11
12
AO5/D7
AO6/D6
AO7/D5
AO8/D4
AO9/D3
AO10/D2
AO11/D1
AO12/D0
E
I/O
8-bit D/A outputs with OP Amp. *
2
In I/O expander operation, these pins function as parallel data in-
put/output pins.
13
VCC
Power supply
Power supply pin for digital circuits and OP Amp.
24
GND
GND
GND pin for digital circuits and OP Amp.
22
VDD1
Power supply
Reference power supply pin for D/A converter (H) . AO1 to AO4.
23
VSS1
Power supply
Reference power supply pin for D/A converter (L) . AO1 to AO4.
15
VDD2
Power supply
Reference power supply pin for D/A converter (H) . AO5 to AO12.
14
VSS2
Power supply
Reference power supply pin for D/A converter (L) . AO5 to AO12.
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