參數(shù)資料
型號: LTC1595AIN8#PBF
廠商: Linear Technology
文件頁數(shù): 2/16頁
文件大?。?/td> 0K
描述: IC D/A CONV 16BIT MULTPLYNG 8DIP
標準包裝: 50
設置時間: 1µs
位數(shù): 16
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 單電源
功率耗散(最大): 55µW
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應商設備封裝: 8-PDIP
包裝: 管件
輸出數(shù)目和類型: 1 電流,單極;1 電流,雙極
采樣率(每秒): *
LTC1595/LTC1596/LTC1596-1
10
159561fb
applicaTions inForMaTion
Description
The LTC1595/LTC1596 are 16-bit multiplying DACs which
have serial inputs and current outputs. They use preci-
sion R/2R technology to provide exceptional linearity and
stability. The devices operate from a single 5V supply and
provide ±10V reference input and voltage output ranges
when used with an external op amp. These devices have
a proprietary deglitcher that reduces glitch impulse to
1nV-s over a 0V to 10V output range.
Serial I/O
The LTC1595/LTC1596 have SPI/MICROWIRE compatible
serialportsthataccept16-bitserialwords.Dataisaccepted
MSB first and loaded with a load pin.
The 8-pin LTC1595 has a 3-wire interface. Data is shifted
into the SRI data input on the rising edge of the CLK pin.
At the end of the data transfer, data is loaded into the DAC
register by pulling the LD pin low (see LTC1595 Timing
Diagram).
The 16-pin LTC1596 can operate in identical fashion to the
LTC1595butoffersadditionalpinsforflexibility.Fourclock
pins are available STB1, STB2, STB3 and STB4. STB1,
STB2 and STB4 operate like the CLK pin of the LTC1595,
capturing data on their rising edges. STB3 captures data
on its falling edge (see Truth Table 1).
TheLTC1596hastwoloadpins,LD1andLD2.Toloaddata,
both pins must be taken low. If one of the pins is grounded,
the other pin will operate identically to LTC1595’s LD pin.
An asynchronous clear input (CLR) resets the LTC1596 to
zero-scale (and the LTC1596-1 to mid-scale) when pulled
low (see Truth Table 2).
The LTC1596 also has a data output pin SRO that can be
connected to the SRI input of another DAC to daisy chain
multiple DACs on one 3-wire interface (see LTC1596 Tim-
ing Diagram).
Unipolar (2-Quadrant Multiplying) Mode
(VOUT = 0V to –VREF)
The LTC1595/LTC1596 can be used with a single op amp
to provide 2-quadrant multiplying operation as shown in
Figure 1. With a fixed –10V reference, the circuits shown
give a precision unipolar 0V to 10V output swing.
Figure 1. Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to –VREF
(a)
(b)
Table 1. Unipolar Binary Code Table
DIGITAL INPUT BINARY NUMBER
IN DAC REGISTER
ANALOG OUTPUT VOUT
MSB
LSB
1111
1111 –VREF (65,535/65,536)
1000
0000
0000 –VREF (32,768/65,536) = –VREF/2
0000
0001 –VREF (1/65,536)
0000
0000 0V
VDD VREF
LTC1596
RFB
AGND
DGND
3
12
10
4
7
5
6
9
8
11
2
14
13
5V
VREF
–10V TO 10V
TO NEXT DAC
FOR DAISY-CHAINING
15
16
1
OUT1
33pF
0.1F
VOUT
0V TO –VREF
1595/96 F01a
OUT2
+
LT1001
CLR
STB3
STB1
SRI
LD1
SRO
LD2
STB2
STB4
P
VDD VREF
LTC1595
RFB
GND
4
7
6
5
8
5V
VREF
–10V TO 10V
CLK
SRI
LD
1
2
3
OUT1
33pF
VOUT
0V TO –VREF
1595/96 F01b
+
LT1001
P
0.1F
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