LTC1665_15 Datasheet, PDF (1/18 Pages) Linear Technology – Micropower Octal 8-Bit and 10-Bit DACs

FEATURES
n _{Tiny: 8 DACs in the Board Space of an SO-8}
n _{Micropower: 56μA per DAC Plus}
1μA Sleep Mode for Extended Battery Life
n _{Pin Compatible 8-Bit LTC1665 and 10-Bit LTC1660}
n _{Wide 2.7V to 5.5V Supply Range}
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 Constant—}
Eliminates External Buffer
APPLICATIONS
n _{Mobile Communications}
n _{Remote Industrial Devices}
n _{Automatic Calibration for Manufacturing}
n _{Portable Battery-Powered Instruments}
n _{Trim/Adjust Applications}
LTC1665/LTC1660
Micropower Octal
8-Bit and 10-Bit DACs
DESCRIPTION
The 8-bit LTC^®1665 and 10-bit LTC1660 integrate eight
accurate, serially addressable digital-to-analog convert-
ers (DACs) in tiny 16-pin narrow SSOP packages. Each
buffered DAC draws just 56μA total supply current, yet
is capable of supplying DC output currents in excess
of 5mA and reliably driving capacitive loads to 1000pF.
Sleep mode further reduces total supply current to 1μA.
Linear Technology’s proprietary, inherently monotonic volt-
age interpolation architecture provides excellent linearity
while allowing for an exceptionally small external form factor.
Ultralow supply current, power-saving Sleep mode and
extremely compact size make the LTC1665 and LTC1660
ideal for battery-powered applications, while their ease
of use, high performance and wide supply range make
them excellent choices as general purpose converters.
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.
BLOCK DIAGRAM
GND 1
V_{OUT A} 2
DAC A
DAC H
V_{OUT B} 3
DAC B
DAC G
V_{OUT C} 4
DAC C
DAC F
V_{OUT D} 5
REF 6
CS/LD 7
SCK 8
DAC D
DAC E
CONTROL
LOGIC
ADDRESS
DECODER
SHIFT REGISTER
16 V_CC
15 V_{OUT H}
14 VOUT G
13 VOUT F
12 VOUT E
11 CLR
10 D_OUT
9 D_IN
166560 BD
LTC1665 Differential Nonlinearity (DNL)
0.5
V_CC = 5V
0.4 _{VREF = 4.096V}
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
64
128
192
255
CODE
166560 G09
LTC1660 Differential Nonlinearity (DNL)
1
0.8
V_CC = 5V
V_REF = 4.096V
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1
0
256
512
CODE
768
1023
166560 G13
166560fa
1