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LTC2641_15

更新时间： 2024-09-22 01:20:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
24页 304K
描述
16-/14-/12-Bit VOUT DACs

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LTC2641_15 数据手册

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LTC2641/LTC2642  
16-/14-/12-Bit V DACs in  
OUT  
3mm × 3mm DFN  
FEATURES  
DESCRIPTION  
The LTC®2641/LTC2642 are families of 16-, 14- and 12-bit  
unbufferedvoltageoutputDACs.TheseDACsoperatefrom  
a single 2.7V to 5.5V supply and are guaranteed mono-  
tonic over temperature. The LTC2641A-16/LTC2642A-16  
provide 16-bit performance ( 1LSB INL and 1LSB DNL)  
over temperature. Unbuffered DAC outputs result in low  
supply current of 120µA and a low offset error of 1LSB.  
n
Tiny 3mm × 3mm 8-Pin DFN Package  
n
Maximum 16-Bit INL Error: 1LSB over Temperature  
n
Low 120µA Supply Current  
n
Guaranteed Monotonic over Temperature  
n
Low 0.5nV•sec Glitch Impulse  
n
2.7V to 5.5V Single Supply Operation  
n
Fast 1µs Settling Time to 16 Bits  
n
Unbuffered Voltage Output Directly Drives 60k Loads  
Both the LTC2641 and LTC2642 feature a reference input  
n
50MHz SPI/QSPI/MICROWIRE Compatible  
range of 2V to V . V  
swings from 0V to V . For  
DD OUT  
REF  
Serial Interface  
bipolar operation, the LTC2642 includes matched scaling  
n
Power-On Reset Clears DAC Output to Zero Scale  
resistors for use with an external precision op amp (such  
(LTC2641) or Midscale (LTC2642)  
as the LT1678), generating a V output swing at R .  
REF  
FB  
n
Schmitt-Trigger Inputs for Direct Optocoupler  
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 CLR pin  
asynchronously clears the DAC to zero scale (LTC2641)  
or midscale (LTC2642). These DACs are all specified over  
the commercial and industrial ranges.  
Interface  
Asynchronous CLR Pin  
n
n
8-Lead MSOP and 3mm × 3mm DFN Packages  
(LTC2641)  
n
10-Lead MSOP and 3mm × 3mm DFN Packages  
(LTC2642)  
APPLICATIONS  
n
High Resolution Offset and Gain Adjustment  
n
Process Control and Industrial Automation  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
Automatic Test Equipment  
Data Acquisition Systems  
n
TYPICAL APPLICATION  
Bipolar 16-Bit DAC  
LTC2642-16 Integral Nonlinearity  
V
REF  
2.7V TO 5.5V  
2V TO V  
DD  
0.1µF  
1µF  
0.1µF  
1.0  
V
V
= 5V  
DD  
REF  
2.5V RANꢀE  
0.8  
0.6  
= 2.5V  
R
FB  
REF  
V
DD  
LTC2642  
5pF  
–
INV  
0.4  
0.2  
BIPOLAR V  
REF  
OUT  
TO V  
1/2 LT1678  
+
–V  
REF  
V
OUT  
0
16-BIT DAC  
POWER-ON  
RESET  
–0.2  
–0.4  
–0.6  
–0.8  
–1.0  
INL 25°C  
INL 90°C  
INL –45°C  
CS  
16-BIT DATA LATCH  
SCLK  
DIN  
CLR  
CONTROL  
LOGIC  
0
32768  
CODE  
49152  
16-BIT SHIFT REGISTER  
16384  
65535  
GND  
26412 TA01a  
26412 TA01b  
26412fd  
1
For more information www.linear.com/LTC2641  
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