參數(shù)資料
型號(hào)： DAC8408FPC
廠商： ANALOG DEVICES INC
元件分類： DAC
英文描述： Quad 8-Bit Multiplying CMOS D/A Converter with Memory
中文描述： QUAD, PARALLEL, 8 BITS INPUT LOADING, 0.19 us SETTLING TIME, 8-BIT DAC, PQCC28
封裝： PLASTIC, LCC-28
文件頁(yè)數(shù)： 12/16頁(yè)
文件大?。?/td> 217K
代理商： DAC8408FPC
DAC8408
–12–
REV. A
SINGLE SUPPLY , VOLT AGE OUT PUT OPE RAT ION
T he DAC8408 can be connected with a single +5 V supply to
produce DAC output voltages from 0 V to +1.5 V. In Figure 8,
the DAC8408 R-2R ladder is inverted from its normal connec-
tion. A +1.500 V reference is connected to the current output pin
4 (I
OUT 1A
), and the normal V
REF
input pin becomes the DAC
output. Instead of a normal current output, the R-2R ladder out-
puts a voltage. T he OP-490, consisting of four precision low
power op amps that can operate its inputs and outputs to zero
volts, buffers the DAC to produce a low impedance output volt-
age from 0 V to +1.5 V full-scale. T able III shows the code table.
With the supply and reference voltages as shown, better than 1/2
LSB differential and integral nonlinearity can be expected. T o
maintain this performance level, the +5 V supply must not drop
below 4.75 V. Similarly, the reference voltage must be no higher
than 1.5 V. T his is because the CMOS switches require a mini-
mum level of bias in order to maintain the linearity performance.
T able III. Single Supply Binary Code T able (Refer to Figure 8)
DAC Data Input
MSB
LSB
Analog Output
1 1 1 1 1 1 1 1
V
REF
255
256
, +1.4941 V
1 0 0 0 0 0 0 1
V
REF
129
256
, +0.7559 V
1 0 0 0 0 0 0 0
V
REF
128
256
, +0.7500 V
0 1 1 1 1 1 1 1
V
REF
127
256
, +0.7441 V
0 0 0 0 0 0 0 1
V
REF
1
256
, +0.0059 V
0 0 0 0 0 0 0 0
V
REF
0
256
, 0.0000 V
Figure 8. Unipolar Supply, Voltage Output DAC Operation
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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DAC8408FS-REEL 制造商:Analog Devices 功能描述:DAC 4-CH R-2R 8-bit 28-Pin SOIC W T/R 制造商:Analog Devices 功能描述:DAC8408 W/TAPE & REEL - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:DAC8408 W/TAPE & REEL - Tape and Reel
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