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LTC1669CS5 Datasheet

  • LTC1669CS5

  • 10-Bit Rail-to-Rail Micropower DAC with I2C Interface

  • 12頁

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LTC1669
10-Bit Rail-to-Rail
Micropower DAC with I
2
C Interface
FEATURES
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
Micropower 10-Bit DAC in SOT-23
Low Operating Current: 60碌A(chǔ)
Ultralow Power Shutdown Mode: 12碌A(chǔ)
2-Wire Serial Interface Compatible
with I
2
C
TM
Selectable Internal Reference or Ratiometric to V
CC
Maximum DNL Error: 0.75LSB
8 User Selectable Addresses (MSOP Package)
Single 2.7V to 5.5V Operation
Buffered True Rail-to-Rail Voltage Output
Power-On Reset
1.5V V
IL
and 2.1V V
IH
for SDA and SCL
Small 5-Lead SOT-23 and 8-Lead MSOP Packages
The LTC
廬
1669 is a 10-bit voltage output DAC with true
buffered rail-to-rail output voltage capability. It operates
from a single supply with a range of 2.7V to 5.5V. The
reference for the DAC is selectable between the supply
voltage or an internal bandgap reference. Selecting the
internal bandgap reference will set the full-scale output
voltage range to 2.5V. Selecting the supply as the refer-
ence sets the output voltage range to the supply voltage.
The part features a simple 2-wire serial interface compat-
ible with I
2
C that allows communication between many
devices. The internal data registers are double buffered to
allow for simultaneous update of several devices at once.
The DAC can be put in low current power-down mode for
use in power conscious systems.
Power-on reset ensures the DAC output is at 0V when
power is initially applied, and all internal registers are
cleared. The LTC1669 is pin-for-pin compatible with the
LTC1663.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
2
C is a trademark of Philips Electronics N.V.
APPLICATIO S
s
s
s
s
s
s
Digital Calibration
Offset/Gain Adjustment
Industrial Process Control
Automatic Test Equipment
Arbitrary Function Generators
Battery-Powered Data Conversion Products
BLOCK DIAGRA
4 (5)
V
CC
1.25V
BANDGAP
REFERENCE
REFERENCE
SELECT
ERROR (LSB)
10-BIT
DAC LATCH
10-BIT BUFFERED V
OUT
DAC
MSOP
PACKAGE
ONLY
(6) AD0
(2) AD1
(3) AD2
2-WIRE INTERFACE
SDA
1 (1)
SCL
5 (4)
GND
2 (7)
1669 BD
V
OUT
3 (8)
COMMAND
LATCH
INPUT
LATCH
NOTE: PIN NUMBERS IN PARENTHESES REFER TO THE MSOP PACKAGE
1669f
U
Differential Nonlinearity (DNL)
1.0
0.8
0.6
0.4
0.2
0
鈥?0.2
鈥?0.4
鈥?0.6
鈥?0.8
鈥?.0
0
28
156 384 512 640 768 896 1024
CODE
1669 G02
W
U
V
REF
= V
CC
= 5V
T
A
= 25擄C
1

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