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Электронный компонент: dac1253x

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DAC1253X
0.25

m 2.5V 12-bit 2MSPS DAC
1
GENERAL DESCRIPTION
DAC1253X is a CMOS 12Bit D/A converter for general application. This digital to analog converter has a R-string
structure. Its settling time is 500ns (Typical value).
FEATURES
-- Resolution:
12Bit
-- Differential
Linearity
Error:
1.0
LSB
-- Integral
Linearity
Error:
4.0
LSB
-- Settling
Time:
500ns
-- Low
Power
Consumption:
890
A
-- Power
Down
Mode
-- Operation
Temperature
Range:
0
C
~
70
C
-- Power
Supply:
2.5V
Single
TYPICAL APPLICATIONS
-- Hard Disk Driver (HDD)
-- Battery Operated Instruments
-- Motor Control Systems
-- General Applications
0.25

m 2.5V 12-bit 2MSPS DAC
DAC1253X
2
FUNCTIONAL BLOCK DIAGRAM
D[11:0]
12
N
R-String
VRB
VRT
VOUT
CNTRL
PWDN
AMPSEL
VDD25A1
VSS25A1
VDD25A2
VSS25A2
Dout
1-of-2
N
Decoder
Dout
1-of-2
M
Decoder
M
VBBA
2
N
2
M
SEL
SELB
PWDNA
PWDNB
SEL
SEL
SELB
SELB
PWDNA
PWDNB
SW
SW
SW
SW
1.8V
AMP
2.5V
AMP
_
+
_
+
Ver 1.8 (June 2003)
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 data sheet is subject to change without any notice.
DAC1253X
0.25

m 2.5V 12-bit 2MSPS DAC
3
CORE PIN DESCRIPTION
Name
I/O Type
I/O Pad
Pin Description
D[11:0]
DI
picc_abb
Digital Input Data (12bit)
D[11]: MSB, D[0]: LSB
AMPSEL
DI
picc_abb
Amp Selection (Low: 2.5V Amp)
PWDN
DI
picc_abb
Power Down (Active Low)
VRT
AB
pia_abb
Voltage Reference Top
VRB
AB
pia_abb
Voltage Reference Bottom
VOUT
AO
poa_abb
Analog Voltage Output
VDD25A1
AP
vdd2t_abb
Analog Power (+2.5V)
VSS25A1
AG
vdd2t_abb
Analog Ground (0.0V)
VDD25A2
DP
vdd2t_abb
Digital Power (+2.5V)
VSS25A2
DG
vss2t_abb
Digital Ground (0.0V)
VBBA
AG
vbb_abb
Analog Sub Bias (0.0V)
I/O TYPE ABBR.
-- AI: Analog Input
-- DI: Digital Input
-- AO: Analog Output
-- DO: Digital Output
-- AB: Analog Bidirectional
-- DB: Digital Bidirectional
-- AP: Analog Power
-- DP: Digital Power
-- AG: Analog Ground
-- DG: Digital Ground
0.25

m 2.5V 12-bit 2MSPS DAC
DAC1253X
4
CORE CONFIGURATION
VRT
VRB
D[11:0]
AMPSEL
VOUT
VDD25A1
VSS25A1
VDD25A2
VSS25A2
VBBA
PWDN
dac1253x
(dac1253a)
DAC1253X
0.25

m 2.5V 12-bit 2MSPS DAC
5
ABSOLUTE MAXIMUM RATINGS
Characteristics
Symbol
Value
Unit
Supply Voltage
VDD (VDD25A1, VDD25A2)
3.3
V
Analog Output Voltage
VOUT
VSS25A1 to VDD25A1
V
Digital Input Voltage
D[11:0]
VSS25A2 to VDD25A2
V
Reference Voltage
VRT
VRB
VDD25A1
VSS25A1
V
Operating Temperature Range
Topr
0 to 70
C
NOTES:
1.
ABSOLUTE MAXIMUM RATING specifies the values beyond which the device may be damaged permanently. Exposure
to ABSOLUTE MAXIMUM RATING conditions for extended periods may affect reliability. Each condition value is applied
with the other values kept within the following operating conditions and function operation under any of these conditions
is
not implied.
2. All voltages are measured with respect to VSS(VSS25A1 or VSS25A2 or VBBA) unless otherwise specified.
3. 100pF capacitor is discharged through a 1.5k
resistor (Human body model)
RECOMMENDED OPERATING CONDITIONS
Characteristics
Symbol
Min
Typ
Max
Unit
Supply Voltage
VDD25A1 - VSS25A1
VDD25A2 - VSS25A2
2.375
2.5
2.625
V
Supply Voltage Difference
VDD25A1 - VDD25A2
-0.1
0.0
0.1
V
Reference Voltage
VRT
VRB
-
VSS25A1
-
-
VDD25A1
-
V
Digital Input 'Low' Voltage
Digital Input 'High' Voltage
VIL
VIH
-
0.7VDD
-
-
0.3VDD
-
V
Operating Temperature
Topr
0
-
70
C
NOTES:
1. It is strongly recommended that to avoid power latch-up all the supply pins (VDD18A1 , VDD18A2) be driven from the
same source.
2.
Digital Input: VDD
VDD25A2