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參數資料
| 型號： | LCZP |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 16-/14-/12-Bit VOUT DACs in 3mm 】 3mm DFN |
| 中文描述： | 16/14/12 VOUT電源數模轉換器采用3mm DFN封裝】3毫米 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 317K |
| 代理商： | LCZP |
LTC2641/LTC2642
1
26412f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-/14-/12-Bit V
OUT
DACs in
3mm
×
3mm DFN
The LTC
2641/LTC2642 are families of 16-, 14- and 12-bit
unbuffered voltage output DACs. These DACs operate from
a single 2.7V to 5.5V supply and are guaranteed monotonic
over temperature. The LTC2641-16/LTC2642-16 provide
16-bit performance (±2LSB INL and ±1LSB DNL) over
temperature. Unbuffered DAC outputs result in low supply
current of 120μA and a low offset error of ±1LSB.
Both the LTC2641 and LTC2642 feature a reference input
range of 2V to V
DD
. V
OUT
swings from 0V to V
REF
. For
bipolar operation, the LTC2642 includes matched scaling
resistors for use with an external precision op amp (such
as the LT1678), generating a ±V
REF
output swing at R
FB
.
The LTC2641/LTC2642 use a simple SPI/MICROWIRE
compatible 3-wire serial interface which can be operated
at clock rates up to 50MHz and can interface directly
with optocouplers for applications requiring isolation. A
power-on reset circuit clears the LTC2641’s DAC output
to zero scale and the LTC2642’s DAC output to midscale
when power is initially applied. A logic low on the
C
L
R pin
asynchronously clears the DAC to zero scale (LTC2641)
or midscale (LTC2642). These DACs are all specified over
the commercial and industrial ranges.
■
Tiny 3mm
×
3mm 8-Pin DFN Package
■
Maximum 16-Bit INL Error: ±2LSB over Temperature
■
Low 120μA Supply Current
■
Guaranteed Monotonic over Temperature
■
Low 0.5nVsec Glitch Impulse
■
2.7V to 5.5V Single Supply Operation
■
Fast 1μs Settling Time to 16 Bits
■
Unbuffered Voltage Output Directly Drives 60k Loads
■
50MHz SPI
TM
/QSPI
TM
/MICROWIRE
TM
Compatible
Serial Interface
■
Power-On Reset Clears DAC Output to Zero Scale
(LTC2641) or Midscale (LTC2642)
■
Schmitt-Trigger Inputs for Direct Optocoupler
Interface
■
Asynchronous
C
L
R Pin
■
8-Lead MSOP and 3mm
×
3mm DFN Packages
(LTC2641)
■
10-Lead MSOP and 3mm
×
3mm DFN Packages
(LTC2642)
■
High Resolution Offset and Gain Adjustment
■
Process Control and Industrial Automation
■
Automatic Test Equipment
■
Data Aquisition Systems
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Bipolar 16-Bit DAC
–
1/2 LT1678
+
16-BIT DATA LATCH
CONTROL
LOGIC
16-BIT DAC
INV
R
FB
V
DD
V
2V TO
V
DD
BIPOLAR V
OUT
–V
REF
TO V
REF
0.1
μ
F
5pF
REF
2.7V TO 5.5V
V
OUT
GND
26412 TA01a
16-BIT SHIFT REGISTER
1
μ
F
0.1
μ
F
LTC2642
POWER-ON
RESET
CS
SCLK
DIN
CLR
CODE
0
–1.0
I
–0.8
–0.4
–0.2
0
1.0
0.4
16384
32768
LT1372 G10
–0.6
0.6
0.8
0.2
49152
65535
V
DD
= 5V
V
= 2.5V
±
2.5V RANGE
INL 25
°
C
INL 90
°
C
INL –45
°
C
LTC2642-16 Integral Nonlinearity
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