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Linear Technology Electronic Components Datasheet

LTC1662 Datasheet

Ultralow Power/ Dual 10-Bit DAC in MSOP

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LTC1662 pdf
Features
n Ultralow Power: 1.5µA (Typ) ICC per DAC Plus
0.05µA Sleep Mode for Extended Battery Life
n Tiny: Two 10-Bit DACs in an 8-Lead MSOP—
Half the Size of an SO-8
n Wide 2.7V to 5.5V Supply Range
n Double Buffered for Simultaneous DAC Updates
n Rail-to-Rail Voltage Outputs Drive 1000pF
n Reference Range Includes Supply for Ratiometric
0V to VCC Output
n Reference Input Impedance Is Code-Independent
(7.1MΩ Typ)—Eliminates External Buffers
n 3-Wire Serial Interface with Schmitt Trigger Inputs
n Differential Nonlinearity: ±0.75LSB Max
Applications
n Mobile Communications
n Portable Battery-Powered Instruments
n Remote or Inaccessible Adjustments
n Digitally Controlled Amplifiers and Attenuators
n Factory or Field Calibration
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
LTC1662
Ultralow Power, Dual
10-Bit DAC in MSOP
Description
The LTC®1662 is an ultralow power, fully buffered voltage
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 supplying
DC output currents in excess of 1mA and reliably driving
capacitive loads of up to 1000pF. A programmable sleep
mode further reduces total operating current 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,
VCC = 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 in-
dustrial temperature range.
Block Diagram
VOUT A
8
GND
7
10-BIT
DAC A
VCC
6
1
CS/LD
CONTROL
LOGIC
ADDRESS
DECODER
SHIFT REGISTER
23
SCK SDI
VOUT B
5
10-BIT
DAC B
4
REF
1662 BD
Total Supply-Plus-Reference
Operating Current
5.0
4.5 5.5V
4.0 4.5V
3.5
3.0
2.5 3.6V
2.0 VCC = 2.7V
1.5
1.0
0.5 VREF = VCC
0 CODE = 1023
–55 –35 –15 5
25 45 65 85 105 125
TEMPERATURE (°C)
1662 TA01b
1662fa
1


Linear Technology Electronic Components Datasheet

LTC1662 Datasheet

Ultralow Power/ Dual 10-Bit DAC in MSOP

No Preview Available !

LTC1662 pdf
LTC1662
Absolute Maximum Ratings
(Note 1)
VCC to GND................................................ –0.3V to 7.5V
Logic Inputs to GND ................................. –0.3V to 7.5V
VOUT A, VOUT B, REF to GND.......... –0.3V to (VCC + 0.3V)
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 150°C
Operating Temperature Range
LTC1662C................................................ 0°C to 70°C
LTC1662I............................................. –40°C to 85°C
Lead Temperature (Soldering, 10 sec)................... 300°C
Pin Configuration
TOP VIEW
CS/LD 1
SCK 2
SDI 3
REF 4
8 VOUT A
7 GND
6 VCC
5 VOUT B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 150°C/W
TOP VIEW
CS/LD 1
SCK 2
SDI 3
REF 4
8 VOUT A
7 GND
6 VCC
5 VOUT B
N8 PACKAGE
8-LEAD PLASTIC DIP
TJMAX = 125°C, θJA = 100°C/W
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC1662CMS8#PBF
LTC1662CMS8#TRPBF LTKB
8-Lead Plastic MSOP
LTC1662IMS8#PBF
LTC1662IMS8#TRPBF LTKC
8-Lead Plastic MSOP
LTC1662CN8#PBF
LTC1662CN8#TRPBF
LTC1662CN8
8-Lead Plastic DIP
LTC1662IN8#PBF
LTC1662IN8#TRPBF
LTC1662IN8
8-Lead Plastic DIP
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC1662CMS8
LTC1662CMS8#TR
LTKB
8-Lead Plastic MSOP
LTC1662IMS8
LTC1662IMS8#TR
LTKC
8-Lead Plastic MSOP
LTC1662CN8
LTC1662CN8#TR
LTC1662CN8
8-Lead Plastic DIP
LTC1662IN8
LTC1662IN8#TR
LTC1662IN8
8-Lead Plastic DIP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
1662fa
2


Part Number LTC1662
Description Ultralow Power/ Dual 10-Bit DAC in MSOP
Maker Linear Technology
Total Page 16 Pages
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