參數(shù)資料
型號: SP9500
英文描述: 12-Bit, Voltage Output D/A Converter
中文描述: 12位電壓輸出D / A轉(zhuǎn)換
文件頁數(shù): 5/9頁
文件大小: 157K
代理商: SP9500
SP9500DS/04
SP9500 12-Bit, Voltage Output D/A Converter
5
Copyright 2000 Sipex Corporation
V
OUT
V
REF
DAC
12
1
SHIFT
REGISTER
D
IN
+
+
D
IN
V
REF
V
OUT
V
DAC
V
OUT
V
DAC
V
DAC
(
D
IN
4096
WHERE…
=
=
x (V
REF
- AGND) + AGND
)
LATCH
12
AGND
AGND
DAC
REGISTER
Figure 1. Detailed Block Diagram
USING THE SP9500
External Reference
The R-2R DAC input resistance is code depen-
dent and is minimum (11k
) at code 1365 and
2731. And, it is nearly infinite at code 0. Be-
cause of the code-dependent nature of the refer-
ence inputs, a high quality, low output imped-
ance amplifier should be used to drive the V
REF
and AGND inputs.
Serial Clock and Update Rate
The
SP9500
maximum serial clock rate (SCLK)
is given by 1/(t
+t
) which is approximately
12.5 MHz. The digital word update rate is lim-
ited by the chip select period, which is 12 X
Figure 2. Transfer Function
SCLK periods plus the CS high pulse width t
.
This is equal to a 1
μ
s or 1 MHz update rate.
However, the DAC settling time to 12–Bits is 7.5
μ
s, which for full scale output transitions would
limit the update rate to 125 kHz.
Logic Interface
The
SP9500
is designed to be compatible with
TTL and CMOS logic levels. However, driving
the digital inputs with TTL level signals will
increase the power consumption of the part by
300
μ
A. In order to achieve the lowest power
consumption use rail-to-rail CMOS levels to
drive the digital inputs.
+0.5 lsb
DNLE
-0.5 lsb
+0.5 lsb
INLE
-0.5 lsb
0
CODE
4095
DNLE, INLE Plots
相關(guān)PDF資料
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SP9500AN 12-Bit, Voltage Output D/A Converter
SP9500AS 12-Bit, Voltage Output D/A Converter
SP9500BN 12-Bit, Voltage Output D/A Converter
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SP9500JN 12-Bit, Voltage Output D/A Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SP9500AN 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit, Voltage Output D/A Converter
SP9500AS 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit, Voltage Output D/A Converter
SP9500BN 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit, Voltage Output D/A Converter
SP9500BS 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit, Voltage Output D/A Converter
SP9500JN 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:12-Bit, Voltage Output D/A Converter