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LTC1662CMS8

Description
Ultralow Power, Dual 10-Bit DAC in MSOP
CategoryAnalog mixed-signal IC    converter   
File Size187KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC1662CMS8 Overview

Ultralow Power, Dual 10-Bit DAC in MSOP

LTC1662CMS8 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
Parts packaging codeMSOP
package instructionTSSOP, TSSOP8,.19
Contacts8
Manufacturer packaging codeMS8
Reach Compliance Code_compli
ECCN codeEAR99
Maximum analog output voltage5.494 V
Converter typeD/A CONVERTER
Enter bit codeBINARY
Input formatSERIAL
JESD-30 codeS-PDSO-G8
JESD-609 codee0
length3 mm
Maximum linear error (EL)0.3906%
Humidity sensitivity level1
Number of digits10
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP8,.19
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
power supply3/5 V
Certification statusNot Qualified
Maximum seat height1.1 mm
Nominal settling time (tstl)750 µs
Maximum slew rate0.0055 mA
Nominal supply voltage3 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3 mm
Base Number Matches1
LTC1662
Ultralow Power, Dual
10-Bit DAC in MSOP
DESCRIPTIO
The LTC
®
1662 is an ultralow power, fully buffered volt-
age output, dual 10-bit digital-to-analog converter (DAC).
Each DAC channel draws just 1.7µA (typ) total supply-
plus-reference operating current, yet is capable of sup-
plying DC output currents in excess of 1mA and reliably
driving capacitive loads of up to 1000pF. A program-
mable Sleep mode further reduces total operating cur-
rent to 0.05µA.
Linear Technology’s proprietary, inherently monotonic
architecture provides excellent linearity and an exception-
ally small external form factor. The double-buffered input
logic provides simultaneous update capability and can be
used to write to the DACs without interrupting Sleep mode.
With its tiny operating current and exceptionally small
size, the LTC1662 is ideal for use in the most power-
constrained products. For most designs, there is no
perceptible impact on the power budget; the LTC1662
draws many times less current than even a trimpot, while
providing buffered, low impedance (0.5Ω typical,
V
CC
= 5V) rail-to-rail outputs.
The LTC1662 is pin and software compatible with the
LTC1661 dual, 60µA 10-bit DAC. It is available in 8-pin
MSOP and PDIP packages and is specified over the
industrial temperature range.
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
s
s
s
s
s
s
s
s
s
Ultralow Power: 1.5µA (Typ) I
CC
per DAC Plus
0.05µA Sleep Mode for Extended Battery Life
Tiny: Two 10-Bit DACs in an 8-Lead MSOP—
Half the Size of an SO-8
Wide 2.7V to 5.5V Supply Range
Double Buffered for Simultaneous DAC Updates
Rail-to-Rail Voltage Outputs Drive 1000pF
Reference Range Includes Supply for Ratiometric
0V-to-V
CC
Output
Reference Input Impedance Is Code-Independent
(7.1MΩ Typ)—Eliminates External Buffers
3-Wire Serial Interface with
Schmitt Trigger Inputs
Differential Nonlinearity:
±0.75LSB
Max
APPLICATIO S
s
s
s
s
s
Mobile Communications
Portable Battery-Powered Instruments
Remote or Inaccessible Adjustments
Digitally Controlled Amplifiers and Attenuators
Factory or Field Calibration
BLOCK DIAGRA
V
OUT A
8
GND
7
V
CC
6
V
OUT B
5
LATCH
LATCH
LATCH
10-BIT
DAC A
LATCH
10-BIT
DAC B
I
CC
+ I
REF
(µA)
CONTROL
LOGIC
ADDRESS
DECODER
SHIFT REGISTER
1
CS/LD
2
SCK
3
SDI
4
REF
1662 BD
U
W
U
Total Supply-Plus-Reference
Operating Current
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
V
REF
= V
CC
CODE = 1023
5 25 45 65 85 105 125
TEMPERATURE (°C)
1662 G02
5.5V
4.5V
3.6V
V
CC
= 2.7V
0
–55 –35 –15
1

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