DAC1267X
0.18
m 1.8V 9-BIT 40MSPS DAC
1
GENERAL DESCRIPTION
The dac1267x is a CMOS 9Bit D/A converter for general applications. Its maximum conversion rate is 40MSPS and
supply voltage is 1.8V single.
An external 0.7V voltage reference(VBIAS) and a single resistor (RSET) control the full-scale output current.
FEATURES
-- 40 MSPS pipeline operation
-- 1.8V CMOS monolithic construction
--
0.3LSB differential linearity error (typical)
--
1.5LSB integral linearity error (typical)
-- External voltage reference
-- 9-Bit voltage parallel input
TYPICAL APPLICATIONS
-- High Definition Television (HDTV)
-- Hard Disk Drive
-- High Resolution Color Graphics
-- CAE/CAD/CAM
0.18
m 1.8V 9-BIT 40MSPS DAC
DAC1267X
2
FUNCTIONAL BLOCK DIAGRAM
D[8:0]
1st
Latch
Decoders
CCOMP
CLK
AVBB18A
AVSS18D
AVDD18D
AVSS18A
AVDD18A
Buffer
2nd
Latch
Current
Cell
Array
IO
IOB
CK1
CK2
CCOMP
Clock
Generator
CK1
CK2
Amp
+
-
CM
Block
CCOMP
PD
IREF
VBIAS
Ver 2.4 (Apr. 2002)
No responsibility is assumed by SEC for its use nor for any infringements of patents or other rights of third parties
that may result from its use. The content of this datasheet is subject to change without any notice.
DAC1267X
0.18
m 1.8V 9-BIT 40MSPS DAC
3
CORE PIN DESCRIPTION
Pin Name
I/O Type
I/O Pad
Pin Description
D[8:0]
DI
picc_abb
Digital
Input
CLK
DI
picc_abb
Clock
Input
PD
DI
picc_abb
High=power
saving
standby
mode
(normally
=
gnd)
VBIAS
AI
pia_abb
External
Bias
(0.7V)
IREF
AO
poa_abb
Full
Scale
Adjust
Control
CCOMP
AI
pia_abb
Using
Compensation
Capacitor
IO
AO
poa_abb
Analog
Output
(output
Range
:
0.66Vpp)
IOB
AO
poa_abb
Analog
Output
(output
Range
:
0.66Vpp)
AVDD18A
AP
vdd1t_abb
Analog Power
AVSS18A
AG
vss1t_abb
Analog Ground
AVDD18D
DP
vdd1t_abb
Digital
Power
AVSS18D
DG
vss1t_abb
Digital Ground
AVBB18A
AG
vbb_abb
Analog Ground ( bulk bias )
I/O Type Abbr.
-- AI: Analog Input
-- DI: Digital Input
-- AO: Analog Output
-- DO: Digital Output
-- AB: Analog Bi-direction
-- DB: Digital Bi-direction
-- AP: Analog Power
-- AG: Analog Ground
-- DP: Digital Power
-- DG: Digital Ground
DAC1267X
0.18
m 1.8V 9-BIT 40MSPS DAC
5
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Supply Voltage
AVDD18D, AVDD18A
+2.5
V
Digital Input Voltage
Vin
AVSS18D-0.2 to VDD18D+0.2
V
Operating Temperature Range
Topr
-45 to +80
C
Storage Temperature Range
Tstg
-55 to +150
C
NOTES:
1. Absolute maximum rating values applied individually while another parameters are within specified operating condition.
Function operation under any of these conditions is not implied.
2. Applied voltage must be current limited to specified range.
3. Absolute maximum ratings are value beyond which the device may be damaged permanently.
Normal operation is not guaranteed.
RECOMMENDED OPERATING CONDITIONS
Characteristics
Symbol
Min
Typ
Max
Unit
Operating Supply Voltage
AVDD18A-AVSS18A
AVDD18D-AVSS18D
1.6
1.8
2.0
V
Digital Input Voltage High
VIH
0.8
VDD
V
Digital Input Voltage Low
VIL
0.2
VDD
V
Operating Temperature Range
T
OPR
0
70
C
Output Load (effective)
RL
150
Reference Voltage
VBIAS
0.7
V
Clock Cycle Time
Tclk
25
ns
Clock Pulse Width High
Tpwh
12
ns
Clock Pulse Width Low
Tpwl
12
ns
IREF Current
Iref
291.6
uA
NOTES:
1. It is strongly recommended that to avoid power latch-up all the supply pins (AVDD18A, AVDD18D) be driven from the
same source.
2. Voltage on any digital pin that goes below AVSS18D (Digital Ground) by less than 0.2V can induce destructive latch-up.
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