LTC1665/LTC1660
Micropower Octal
8-Bit and 10-Bit DACs
DESCRIPTIO
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
voltage interpolation architecture provides excellent lin-
earity 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
s
s
s
s
s
s
s
Tiny: 8 DACs in the Board Space of an SO-8
Micropower: 56
µ
A per DAC Plus
1µA Sleep Mode for Extended Battery Life
Pin Compatible 8-Bit LTC1665 and 10-Bit LTC1660
Wide 2.7V to 5.5V Supply Range
Rail-to-Rail Voltage Outputs Drive 1000pF
Reference Range Includes Supply for Ratiometric
0V-to-V
CC
Output
Reference Input Impedance is Constant—
Eliminates External Buffer
APPLICATIO S
s
s
s
s
s
Mobile Communications
Remote Industrial Devices
Automatic Calibration for Manufacturing
Portable Battery-Powered Instruments
Trim/Adjust Applications
BLOCK DIAGRA
GND
1
LTC1665 Differential Nonlinearity (DNL)
0.5
16 V
CC
0.4
0.3
0.2
V
CC
= 5V
V
REF
= 4.096V
V
OUT A
2
DAC A
DAC H
15 V
OUT H
LSB
0.1
0
–0.1
–0.2
V
OUT B
3
DAC B
DAC G
14 V
OUT G
–0.3
–0.4
–0.5
0
64
128
CODE
192
255
1665/60 G09
V
OUT C
4
DAC C
DAC F
13 V
OUT F
LTC1660 Differential Nonlinearity (DNL)
1
V
OUT D
5
DAC D
DAC E
12 V
OUT E
0.8
0.6
0.4
V
CC
= 5V
V
REF
= 4.096V
REF
6
CONTROL
LOGIC
ADDRESS
DECODER
11
CLR
0.2
LSB
0
–0.2
–0.4
CS/LD
7
10
D
OUT
SCK
8
SHIFT REGISTER
9
D
IN
–0.6
–0.8
–1
0
256
512
CODE
768
1023
1665/60 G13
1665/60 BD
U
W
U
1
LINER [ LINEAR TECHNOLOGY ]
