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Giải thích chi tiết về linh kiện  16-/14-/12-Bit VOUT DACs in 3mm3mm DFN
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nhà sản xuất  LINER [Linear Technology]
Trang chủ  http://www.linear.com
Logo LINER - Linear Technology

LCZP bảng dữ liệu(HTML) 1 Page - Linear Technology

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LTC2641/LTC2642
1
26412f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-/14-/12-Bit VOUT 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 VDD. VOUT swings from 0V to VREF. For
bipolar operation, the LTC2642 includes matched scaling
resistors for use with an external precision op amp (such
as the LT1678), generating a ±VREF output swing at RFB.
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 0.5nV•sec 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/QSPITM/MICROWIRETM 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
16-BIT DATA LATCH
CONTROL
LOGIC
16-BIT DAC
1/2 LT1678
INV
RFB
VDD
VREF
2V TO VDD
BIPOLAR VOUT
–VREF TO VREF
0.1
μF
5pF
REF
2.7V TO 5.5V
VOUT
GND
26412 TA01a
16-BIT SHIFT REGISTER
1
μF
0.1
μF
LTC2642
POWER-ON
RESET
CS
SCLK
DIN
CLR
CODE
0
–1.0
–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
VDD = 5V
VREF = 2.5V
±2.5V RANGE
INL 25
°C
INL 90
°C
INL –45
°C
LTC2642-16 Integral Nonlinearity


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