參數(shù)資料
型號: DAC8531IDRBTG4
廠商: Texas Instruments
文件頁數(shù): 3/27頁
文件大小: 0K
描述: IC D/A CONV LP 16-BIT 8-SON
產(chǎn)品培訓模塊: Data Converter Basics
標準包裝: 250
設(shè)置時間: 8µs
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): 720µW
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 8-VDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 8-SON 裸露焊盤(3x3)
包裝: 帶卷 (TR)
輸出數(shù)目和類型: 1 電壓,單極;1 電壓,雙極
采樣率(每秒): 93k
配用: 296-13548-ND - EVAL MOD FOR DAC8531
DAC8531
11
SBAS192B
www.ti.com
THEORY OF OPERATION
DAC SECTION
The architecture consists of a string DAC followed by an
output buffer amplifier. Figure 1 shows a block diagram of the
DAC architecture.
CODE CHANGE GLITCH
Time (2
s/div)
V
OUT
(20mV/div)
Glitch Waveform (20mV/div)
TYPICAL CHARACTERISTICS: VDD = 2.7V (Cont.)
At TA = +25°C, VDD = 2.7V, unless otherwise noted.
RESISTOR STRING
Figure 2 shows the resistor string section. It is simply a string
of resistors, each of value R. The code loaded into the DAC
register determines at which node on the string the voltage
is tapped off to be fed into the output amplifier by closing one
of the switches connecting the string to the amplifier. It is
ensured monotonic because it is a string of resistors.
FIGURE 1. DAC8531 Architecture.
The input coding to the DAC8531 is straight binary, so the
ideal output voltage is given by:
VV
D
OUT
REF
=
65536
where D = decimal equivalent of the binary code that is
loaded to the DAC register; it can range from 0 to 65535.
FIGURE 2. Resistor String.
DAC Register
REF (+)
Resistor String
REF(–)
Output
Amplifier
GND
V
DD
V
OUT
V
FB
To Output
Amplifier
R
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