DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD6222
I
2
C-BUS COMPATIBLE 8BIT 12CHANNEL D/A CONVERTER
DESCRIPTION
The
µ
PD6222 is an 8-bit monolithic CMOS digital-to-analog converter using the R-2R technique. The
µ
PD6222
incorporates a 12-channel digital-to-analog converters and I
2
C-bus compatible interface. The designer needs only
2 signals (Serial Data and Serial Clock) to interface and can use 8-ICs (96-channels) on same bus to control chip-
select terminals.
The
µ
PD6222 incorporates Output CMOS Buffer to achieve wide output voltage range and two reference voltage
terminals.
The
µ
PD6222 is ideal for automatic control for color-television.
FEATURES
• 12-channel 8-bit digital-to-analog converter using the R-2R ladder technique
• I
2
C-bus compatible serial interface (Serial Data and Serial Clock)
• 8-ICs (96-channels) can be connected by chip-select terminals
• Output CMOS Buffer to achieve wide output voltage range
• Two reference voltage
ORDERING INFORMATION
PART NO.
PACKAGE
24-pin plastic shrink DIP (300 mil)
24-pin plastic SOP (300 mil)
µ
PD6222CS
µ
PD6222GS
Caution Purchase of NEC I
2
C components conveys a license under the Philips I
2
C patent Right 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.
Document No. S11067EJ2V0DS00 (2nd edition)
Date Published November 1998 N CP(K)
Printed in Japan
©
1996
µ
PD6222
PIN CONFIGURATION
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
SYMBOL
GND
SCL
SDA
AO7
AO8
AO9
AO10
AO11
AO12
V
ref
L1
V
ref
U1
V
ref
L2
V
ref
U2
AO1
AO2
AO3
AO4
AO5
AO6
V
CC
V
DD
CS2
CS1
CS0
Ground
Serial Clock Input
Serial Data Input (Output: acknowledgement signal)
Analog Output Channel 7
Analog Output Channel 8
Analog Output Channel 9
Analog Output Channel 10
Analog Output Channel 11
Analog Output Channel 12
GND Side Reference Voltage Input 1 (The current of I
ref
L1 flows out from IC.)
V
CC
Side Reference Voltage Input 1 (The current of I
ref
U1 flows into IC.)
GND Side Reference Voltage Input 2 (The current of I
ref
L2 flows out from IC.)
V
CC
Side Reference Voltage Input 2 (The current of I
ref
U2 flows into IC.)
Analog Output Channel 1
Analog Output Channel 2
Analog Output Channel 3
Analog Output Channel 4
Analog Output Channel 5
Analog Output Channel 6
Analog Power Supply
Digital Power Supply
Chip Select 2
Chip Select 1
Chip Select 0
FUNCTION
Note
For “Power On Reset” function, when this IC is powered on, Analog Output Data (D0, D1 ··· D7) will
be set all 0. And the all Analog Output will be Zero Scale (1LSB + V
ref
L).
4
µ
PD6222
EQUIVALENT CIRCUIT OF PIN
• Equivalent Circuit of CS0, CS1, CS2 Pins
V
DD
CS0, CS1, CS2
GND
• Equivalent Circuit of SCL Pin
V
DD
SCL
GND
• Equivalent Circuit of SDA Pin
V
DD
SDA
ACK
GND
5