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LT1790A-2.5 Datasheet

  • LT1790A-2.5

  • Dual Current Output 12-/14-/16-Bit SoftSpan DACs with Parall...

  • 24頁

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LTC2753
Dual Current Output
12-/14-/16-Bit SoftSpan
DACs with Parallel I/O
FEATURES
鈻?/div>
DESCRIPTION
The LTC
2753 is a family of dual 12-, 14-, and 16-bit
multiplying parallel-input, current-output DACs. These
DACs operate from a single 2.7V to 5.5V supply and are all
guaranteed monotonic over temperature. The LTC2753A-16
provides 16-bit performance (鹵1LSB INL and DNL) over
temperature without any adjustments. These SoftSpan鈩?/div>
DACs offer six output ranges鈥攖wo unipolar and four
bipolar鈥攖hat can be programmed through the parallel
interface, or pinstrapped for operation in a single range.
The LTC2753 DACs use a bidirectional input/output parallel
interface that allows readback of any on-chip register. A
power-on reset circuit resets the DAC outputs to 0V when
power is initially applied. A logic low on the
CLR
pin asyn-
chronously clears the DACs to 0V in any output range.
The parts are speci鏗乪d over commercial and industrial
temperature ranges.
, LT LTC and LTM are registered trademarks of Linear Technology Corporation.
,
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Six Programmable Output Ranges
Unipolar: 0V to 5V, 0V to 10V
Bipolar: 鹵5V, 鹵10V, 鹵2.5V, 鈥?.5V to 7.5V
Maximum 16-Bit INL Error: 鹵1 LSB over Temperature
Low 1渭A (Maximum) Supply Current
Guaranteed Monotonic over Temperature
Low Glitch Impulse 1nV鈥
2.7V to 5.5V Single Supply Operation
2渭s Settling Time to 鹵1 LSB
Parallel Interface with Readback of All Registers
Asynchronous
CLR
Pin Clears DAC Outputs to 0V in
Any Output Range
Power-On Reset to 0V
48-Pin 7mm 脳 7mm QFN Package
APPLICATIONS
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
High Resolution Offset and Gain Adjustment
Process Control and Industrial Automation
Automatic Test Equipment
Data Acquisition Systems
TYPICAL APPLICATION
Dual 16-Bit V
OUT
DAC with Software-Selectable Ranges
V
REF
5V
R
OFSA
47
R
IN
2
LTC2753-16
46 R
FBA
15pF
45 I
OUT1A
DAC A
R2
REFA 48
REFB 39
4 I
OUT2A
44 R
VOSA
43 R
VOSB
LTC2753-16 Integral Nonlinearity (INL)
V
DD
= 5V
0.8
V
REF
= 5V
鹵10V
RANGE
0.6
1.0
+
1/2 LT1469
R1
R
COM
1
鈥?/div>
150pF
INL (LSB)
DAC B
42 I
OUT1B
R
OFSB
40
SPAN I/O
DATA I/O
3
16
I/O PORT
I/O PORT
15pF
41 R
FBB
鈥?/div>
+
32 I
OUT2B
+
1/2 LT1469
V
OUTB
2753 TA01
鈥?/div>
1/2 LT1469
V
OUTA
0.4
0.2
0.0
鈥?.2
鈥?.4
鈥?.6
鈥?.8
鈥?.0
0
16384
32768
CODE
49152
25擄C
90擄C
鈥?5擄C
65535
2753 TA01b
2753f
1

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