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LTC1662CMS8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC1662
1
1662fa
Block Diagram
Features Description
Ultralow Power, Dual
10-Bit DAC in MSOP
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,
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 in-
dustrial temperature range.
Total Supply-Plus-Reference
Operating Current
applications
n
Ultralow Power: 1.5µA (Typ) I
CC
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 V
CC
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
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.
CS/LD
1662 BD
1
4
10-BIT
DAC A
10-BIT
DAC B
ADDRESS
DECODER
CONTROL
LOGIC
SHIFT REGISTER
SDI REF
3
V
OUT
A
8 5
GND
7
V
CC
V
OUT
B
6
LATCH
LATCH
LATCH
LATCH
SCK
2
TEMPERATURE (°C)
–55 –35 –15 5 25 45 65 85 105 125
I
CC
+ I
REF
(µA)
1662 TA01b
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
REF
= V
CC
CODE = 1023
5.5V
V
CC
= 2.7V
4.5V
3.6V
LTC1662
2
1662fa
aBsolute maximum ratings
V
CC
to GND ............................................... –0.3V to 7.5V
Logic Inputs to GND ................................. –0.3V to 7.5V
V
OUT A
, V
OUT B
, REF to GND ......... –0.3V to (V
CC
+ 0.3V)
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ..................–65°C to 150°C
(Note 1)
1
2
3
4
CS/LD
SCK
SDI
REF
8
7
6
5
V
OUT A
GND
V
CC
V
OUT B
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 150°C/W
1
2
3
4
8
7
6
5
TOP VIEW
CS/LD
SCK
SDI
REF
V
OUT A
GND
V
CC
V
OUT B
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 125°C, θ
JA
= 100°C/W
pin conFiguration
orDer inFormation
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1662CMS8#PBF LTC1662CMS8#TRPBF LTKB 8-Lead Plastic MSOP 0°C to 70°C
LTC1662IMS8#PBF LTC1662IMS8#TRPBF LTKC 8-Lead Plastic MSOP –40°C to 85°C
LTC1662CN8#PBF LTC1662CN8#TRPBF LTC1662CN8 8-Lead Plastic DIP 0°C to 70°C
LTC1662IN8#PBF LTC1662IN8#TRPBF LTC1662IN8 8-Lead Plastic DIP –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1662CMS8 LTC1662CMS8#TR LTKB 8-Lead Plastic MSOP 0°C to 70°C
LTC1662IMS8 LTC1662IMS8#TR LTKC 8-Lead Plastic MSOP –40°C to 85°C
LTC1662CN8 LTC1662CN8#TR LTC1662CN8 8-Lead Plastic DIP 0°C to 70°C
LTC1662IN8 LTC1662IN8#TR LTC1662IN8 8-Lead Plastic DIP –40°C to 85°C
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/
Operating Temperature Range
LTC1662C ............................................... 0°C to 70°C
LTC1662I ............................................ –40°C to 85°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
LTC1662
3
1662fa
electrical characteristics
The l denotes the specifications which apply over the full operating
temperature range (T
A
= T
MIN
to T
MAX
), otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
REF
≤ V
CC
, V
OUT
unloaded
unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Accuracy
Resolution
l
10 Bits
Monotonicity (Note 2)
l
10 Bits
DNL Differential Nonlinearity (Note 2)
l
±0.12 ±0.75 LSB
INL Integral Nonlinearity (Note 2)
l
±0.8 ±4 LSB
V
OS
Offset Error V
CC
= 5V, V
REF
= 4.096V, Measured at Code 20
l
±5 ±25 mV
V
OS
TC V
OS
Temperature Coefficient ±15 µV/°C
GE Gain Error V
CC
= 5V, V
REF
= 4.096V
l
±1 ±8 LSB
GE TC Gain Error Temperature Coefficient ±12 µV/°C
PSR Power Supply Rejection V
REF
= 2.5V 0.18 LSB/V
Reference Input
Input Voltage Range
l
0 V
CC
V
Input Resistance Active Mode
Sleep Mode
l
3.9 7.1
2.5
MΩ
GΩ
Input Capacitance 10 pF
Power Supply
V
CC
Positive Supply Voltage For Specified Performance
l
2.7 5.5 V
I
CC
Supply Current V
CC
= 3V (Note 3)
V
CC
= 5V (Note 3)
V
CC
= 3V (Note 3)
V
CC
= 5V (Note 3)
l
l
3.0
3.5
4.0
4.5
5.0
5.5
µA
µA
µA
µA
Sleep Mode Operating Current Supply Plus Reference Current, V
CC
= V
REF
= 5V (Note 3)
l
0.05 0.10
0.18
µA
µA
DC Performance
Short-Circuit Current Low V
OUT
= 0V, V
CC
= V
REF
= 5V, Code = 1023 (Note 7)
l
5 12 70 mA
Short-Circuit Current High V
OUT
= V
CC
= V
REF
= 5V, Code = 0 (Note 7)
l
3 10 80 mA
AC Performance
Voltage Output Slew Rate Rising (Notes 4, 5)
Falling (Notes 4, 5)
20
7
V/ms
V/ms
Voltage Output Settling Time Rising 0.1V
FS
to 0.9V
FS
±0.5LSB (Notes 4, 5)
Falling 0.9V
FS
to 0.1V
FS
±0.5LSB (Notes 4, 5)
0.40
0.75
ms
ms
Capacitive Load Driving 1000 pF
Digital I/O
V
IH
Digital Input High Voltage V
CC
= 2.7V to 5.5V
V
CC
= 2.7V to 3.6V
l
l
2.4
2.0
V
V
V
IL
Digital Input Low Voltage V
CC
= 4.5V to 5.5V
V
CC
= 2.7V to 5.5V
l
l
0.8
0.6
V
V
I
LK
Digital Input Leakage V
IN
= GND to V
CC
l
±0.05 ±1.0 µA
C
IN
Digital Input Capacitance 1.5 pF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC1662CMS8#PBF

Mfr. #:
Buy LTC1662CMS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC Ultralow Pwr, 2x 10-B DAC in MS
Lifecycle:
New from this manufacturer.
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