參數(shù)資料
型號: LTC2641CS8-16#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: DAC
英文描述: 16-BIT DAC, PDSO8
封裝: LEAD FREE, PLASTIC, MSOP-8
文件頁數(shù): 1/24頁
文件大?。?/td> 334K
代理商: LTC2641CS8-16#TRPBF
LTC2641/LTC2642
1
26412fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-/14-/12-Bit VOUT DACs in
3mm × 3mm DFN
The LTC2641/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 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.
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 CLR pin
asynchronously clears the DAC to zero scale (LTC2641)
or midscale (LTC2642). These DACs are all specied over
the commercial and industrial ranges.
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 0.5nVsec 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
n 50MHz SPI
TM/QSPITM/MICROWIRETM Compatible
Serial Interface
n Power-On Reset Clears DAC Output to Zero Scale
(LTC2641) or Midscale (LTC2642)
n Schmitt-Trigger Inputs for Direct Optocoupler
Interface
n Asynchronous CLR Pin
n 8-Lead MSOP, 3mm × 3mm DFN, and 8-Lead SO
Packages (LTC2641)
n 10-Lead MSOP and 3mm × 3mm DFN Packages
(LTC2642)
n High Resolution Offset and Gain Adjustment
n Process Control and Industrial Automation
n Automatic Test Equipment
n Data Aquisition Systems
Bipolar 16-Bit DAC
LTC2642-16 Integral Nonlinearity
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
+
16-BIT DATA LATCH
CONTROL
LOGIC
16-BIT DAC
1/2 LT1678
INV
RFB
VDD
VREF
2V TO VDD
BIPOLAR VOUT
–VREF TO VREF
0.1μF
5pF
REF
2.7V TO 5.5V
VOUT
GND
26412 TA01a
16-BIT SHIFT REGISTER
1μF
0.1μF
LTC2642
POWER-ON
RESET
CS
SCLK
DIN
CLR
CODE
0
–1.0
INL
(LSB)
–0.8
–0.4
–0.2
0
1.0
0.4
16384
32768
26412 TA01b
–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
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