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參數(shù)資料
| 型號： | 8408RPFS |
| 廠商： | MAXWELL TECHNOLOGIES |
| 元件分類： | DAC |
| 英文描述： | Quad 8-Bit Multiplying CMOS D/A Converter with Memory |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 0.19 us SETTLING TIME, 8-BIT DAC, DFP28 |
| 封裝： | RAD PAK, LDFP-28 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 472K |
| 代理商： | 8408RPFS |
M
14
All data sheets are subject to change without notice
2002 Maxwell Technologies
All rights reserved.
Quad 8-Bit Multiplying CMOS
D/A Converter with Memory
8408
08.20.02 REV 1
APPLICATION HINTS
General Ground Management: AC or transient voltages between AGND and DGND can appear as noise at the 8408’s
analog output. Note that in Figures 5 and 6, IOUT2A/IOUT2B and IOUT 2C/IOUT 2D are connected to AGND. There-
fore, it is recommended that AGND and DGND be tied together at the 8408 socket. In systems where AGND and
DGND are tied together on the backplane, two diodes (1N914 or equivalent) should be connected in inverse parallel
between AGND and DGND.
Write Enable Timing: During the period when both DS and R/W are held low, the DAC latches are transparent and the
analog output responds directly to the digital data input. To prevent unwanted variations of the analog output, the R/W
should not go low until the data bus is fully settled (DATA VALID).
SINGLE SUPPLY, VOLTAGE OUTPUT OPERATION
The 8408 can be connected with a single +5 V supply to produce DAC output voltages from 0 V to +1.5 V. In Figure
10, the 8408 R-2R ladder is inverted from its normal connection. A +1.500 V reference is connected to the current out-
put pin 4 (IOUT 1A), and the normal VREF input pin becomes the DAC output. Instead of a normal current output, the
R-2R ladder outputs a voltage. The 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 voltage from 0 V to +1.5 V full-scale.
Table 7 shows the code table.
With the supply and reference voltages as shown, better than 1/2 LSB differential and integral nonlinearity can be
expected. To 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. This is because the CMOS switches require a minimum level of bias in order to
maintain the linearity performance.
T
ABLE
7. S
INGLE
S
UPPLY
B
INARY
C
ODE
T
ABLE
(R
EFER
TO
F
IGURE
10)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 8408-SRF | 制造商:SPC Multicomp 功能描述:STRAIN RELIEF BUSHING KIT; Kit Contents:Installation Tool, Strain Reliefs, Storage Box, Kit Lid Label ;RoHS Compliant: NA |
| 8408-TM | 制造商:3M Electronic Products Division 功能描述:St Mm Plate, 8 Port, W/Couplings 8408-Tm 制造商:3M Electronic Products Division 功能描述:PLATE 8 PORT W/ST MULTIMODE CPLN 制造商:3M Electronic Products Division 功能描述:PLATE 8 PORT W/ST MULTIMODE COUPLING |
| 8408-TS | 制造商:3M Electronic Products Division 功能描述:3M(TM) ST SM PLATE, 8 PORT, WITH COUPLINGS 制造商:3M Electronic Products Division 功能描述:ST SM PLATE, 8 PORT, W/COUPLINGS 8408 TS 制造商:3M Electronic Products Division 功能描述:PLATE 8 PORT W/ST SINGLEMODE CPL 制造商:3M Electronic Products Division 功能描述:PLATE 8 PRT W/ST SNGLMD COUPLING |
| 8408-TWT | 制造商:Farnell / Duratool 功能描述:CABLE TIE INSTALLATION TOOL KIT; Kit Contents:100-Pcs of Beaded, 200-Pcs of Twist-Type Wire Ties, Kit Lid Label; Accessory Type:Cable Tie ;RoHS Compliant: NA |
| 8409 | 功能描述:支架與墊片 AL 1.500 M/F THRD RoHS:否 制造商:Schurter 類型:Transipillar Spacers 長度:16 m 螺紋大小:M4 外徑:10 mm 材料:Nylon with Steel 電鍍:Zinc |
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