The following document contains information on Cypress products.
FUJITSU MICROELECTRONICS
DATA SHEET
DS04-13211-3Ea
General Purpose Linear IC’s General Purpose Converters
CMOS
D/A Converter for Digital Tuning
(With Built-in OP Amp and I/O Expander)
MB88141
■
DESCRIPTION
The FUJITSU MICROELECTRONICS MB88141 is a 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 MB88141 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).
Can be adapted for tuning by electronically variable or pre-fixed resistance, etc.
■
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)
24-pin plastic SOP
24-pin plastic SSOP
■
PACKAGES
24-pin plastic DIP
(DIP-24P-M02)
(FPT-24P-M01)
(FPT-24P-M03)
“Purchase of Fujitsu Microelectronics 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.”
Copyright©2001-2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved
2001.1
MB88141
(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
DD1
/V
SS1
(AO
1
to AO
4
) and V
DD2
/V
SS2
(AO
5
to
AO
12
), 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
2
MB88141
■
PIN ASSIGNMENT
(TOP VIEW)
AO1
AO2
AO3
AO4
D7/AO5
D6/AO6
D5/AO7
D4/AO8
D3/AO9
D2/AO10
D1/AO 11
D0/AO12
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
VSS1
VDD1
SDA
SCL
MOD
CS2
CS1
CS0
VDD2
VSS2
VCC
(DIP-24P-M02)
(FPT-24P-M01)
(FPT-24P-M03)
3
MB88141
■
PIN DESCRIPTIONS
Pin no.
21
20
19
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
24
22
23
15
14
Symbol
SDA
SCL
MOD
CS0
CS1
CS2
AO1
AO2
AO3
AO4
D7/AO5
D6/AO6
D5/AO7
D4/AO8
D3/AO9
D2/AO10
D1/AO11
D0/AO12
VCC
GND
VDD1
VSS1
VDD2
VSS2
I/O
BUS
I
I
Description
I
2
C bus data input/output pin (hysteresis input). *
2
Outputs the acknowledge signal.
I
2
C bus shift clock input pin (hysteresis input). *
2
D/A converter and I/O expander mode switching pin. *
1,
*
3
Input “L” to operate as a D/A converter, “H” to operate as I/O expander and
D/A converter.
Lower 3 bits of the slave address setting pins. *
1
This allows up to eight MB88141 chips to be used on the same bus line.
I
O
8-bit D/A output with OP Amp. *
3
I/O
8-bit D/A output with OP Amp. *
3
In I/O expander operation, these pins function as parallel data input/output
pins.
⎯
⎯
⎯
⎯
⎯
⎯
Power supply pin for digital circuits and OP Amp.
GND pin for digital circuits and OP Amp.
Reference power supply pin for D/A converter (H). AO1 to AO4.
Reference power supply pin for D/A converter (L). AO1 to AO4.
Reference power supply pin for D/A converter (H). AO5 to AO12.
Reference power supply pin for D/A converter (L). AO5 to AO12.
*1: The MOD and CS0-CS2 pins should be used with fixed level input.
*2: Use particular caution in handling the SDA and SCL pins. These pins have no transistor protection against V
CC
voltage and therefore have weaker anti-static characteristics than other pins.
*3: 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.
4
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