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參數(shù)資料
| 型號： | LTC1662I |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 10-Bit, 12.5 us DAC, Serial Input, Low Power 8-MSOP 0 to 70 |
| 中文描述： | 超低功耗，雙10位DAC，采用MSOP |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 185K |
| 代理商： | LTC1662I |
1
LTC1662
Ultralow Power, Dual
10-Bit DAC in MSOP
March 2000
The LTC
1662 is an ultralow power, fully buffered volt-
age output, dual 10-bit digital-to-analog converter (DAC).
Each DAC draws just 1.7
μ
A (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 a negli-
gible 0.05
μ
A.
Linear Technology’s proprietary, inherently monotonic
voltage interpolation architecture provides excellent lin-
earity while allowing for an exceptionally small external
form factor. The double-buffered input logic provides
simultaneous update capability and can be used to write to
either DAC without interrupting Sleep mode.
With its ultralow operating current and exceptionally
small size, the LTC1662 is ideal for use in battery-
powered products.
The LTC1662 is pin- and software-compatible with the
LTC1661 micropower dual 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.
I
Ultralow Power: 1.5
μ
A (Typ) I
CC
per DAC Plus
0.05
μ
A Sleep Mode for Extended Battery Life
I
Tiny: Two 10-Bit DACs in an 8-Lead MSOP—
Half the Size of an SO-8
I
Wide 2.7V to 5.5V Supply Range
I
Double Buffered for Simultaneous DAC Updates
I
Rail-to-Rail Voltage Outputs Drive 1000pF
I
Reference Range Includes Supply for Ratiometric
0V-to-V
CC
Output
I
Reference Input Impedance Is Code-Independent
(7.1M
Typ)—Eliminates External Buffers
I
3-Wire Serial Interface with
Schmitt Trigger Inputs
I
Differential Nonlinearity:
±
0.75LSB Max
Total Supply-Plus-Reference
Operating Current
I
Mobile Communications
I
Portable Battery-Powered Instruments
I
Remote Industrial Devices
I
Digitally Controlled Amplifiers and Attenuators
I
Automatic Calibration for Manufacturing
FEATURES
DESCRIPTIO
U
APPLICATIOU
BLOCK DIAGRA
W
V
CC
(V)
2.5
3.5
4.5
3.0
4.0
5.0
5.5
T
μ
A
1662 G01
5.5
5.0
4.5
4.0
3.5
3.0
2.5
V
REF
= V
CC
T
A
= 25
°
C
CODE = 1023
CODE = 512
CODE = 0
Final Electrical Specifications
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
CS/LD
1662 BD
1
4
10-BIT
DAC A
10-BIT
DAC B
ADDRESS
DECODER
CONTROL
LOGIC
SHIFT REGISTER
D
IN
REF
3
V
OUT
A
8
5
GND
7
V
CC
6
V
OUT
B
L
L
L
L
SCK
2
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