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參數(shù)資料
| 型號(hào)： | DAC8222FS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 12-BIT DAC, PDSO24 |
| 封裝： | 0.300 INCH, SOL-24 |
| 文件頁數(shù)： | 7/15頁 |
| 文件大?。?/td> | 491K |
| 代理商： | DAC8222FS |
DAC8222
–7–
REV. C
Figure 18. Burn-In Circuit
PARAMETER DEFINITIONS
RESOLUTION (n)
The resolution of a DAC is the number of states (2
n
) into which
the full-scale range (FSR) is divided (or resolved); where
n
is
equal to the number of bits.
RELATIVE ACCURACY (INL)
Relative accuracy, or integral nonlinearity, is the maximum de-
viation of the analog output (from the ideal) from a straight line
drawn between the end points. It is expressed in terms of least
significant bit (LSB), or as a percent of full scale.
DIFFERENTIAL NONLINEARITY (DNL)
Differential nonlinearity is the worst case deviation of any adja-
cent analog output from the ideal 1 LSB step size. The devia-
tion of the actual “step size” from the ideal step size of 1 LSB is
called the differential nonlinearity error or DNL. DACs with
DNL greater than
±
1 LSB may be nonmonotonic
±
1/2 LSB
INL guarantees monotonicity and
±
1 LSB maximum DNL.
GAIN ERROR (G
FSE
)
Gain error is the difference between the actual and the ideal
analog output range, expressed as a percent of full-scale or in
terms of LSB value. It is the deviation in slope of the DAC
transfer characteristic from ideal.
See Orientation in Digital-to-Analog Converters Section of the
current data
book, for additional parameter definitions.
GENERAL CIRCUIT DESCRIPTION
CONVERTER SECTION
The DAC8222 contains four 12-bit registers (two input regis-
ters and two DAC registers), two highly stable thin-film R-2R
resistor ladder networks, and interface control logic circuitry.
Also included are 24 single-pole, double-throw, NMOS transis-
tor current switches.
Figure 19. Simplified Single DAC Circuit Configuration.
(Switches Are Shown for All Digital Inputs at Zero)
Figure 20. N-Channel Current Steering Switch
Figure 19 shows a simplified circuit for the R-2R ladder network
and transistor switches for one DAC. R is typically 11 k
. The
transistor switches are binarily scaled in size to maintain a con-
stant voltage drop across each switch. Figure 20 shows a single
NMOS transistor switch.
The binary-weighted currents are switched between I
OUT
and
AGND by the N-channel MOS transistor switches. The selec-
tion between I
OUT
and AGND is determined by the digital input
code. It is important to note here that the voltage difference
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DAC8222FW | Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter |
| DAC8222GP | Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter |
| DAC8222EW | Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter |
| DAC8228FR | Dual 8-Bit CMOS D/A Converter with Voltage Output |
| DAC8228FS | Dual 8-Bit CMOS D/A Converter with Voltage Output |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC8222FSZ | 功能描述:IC DAC 12BIT DUAL W/BUFF 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 設(shè)置時(shí)間:4.5µs 位數(shù):12 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| DAC8222FSZ-REEL | 功能描述:IC DAC 12BIT DUAL CMOS 24SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 標(biāo)準(zhǔn)包裝:750 系列:- 設(shè)置時(shí)間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:雙 ± 功率耗散（最大）:100mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-LCC（J 形引線） 供應(yīng)商設(shè)備封裝:28-PLCC（11.51x11.51） 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）:143k |
| DAC8222FW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| DAC8222GBC | 制造商:Analog Devices 功能描述: |
| DAC8222GP | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 12-bit 24-Pin PDIP Tube 制造商:Rochester Electronics LLC 功能描述:DUAL 12-BIT CMOS DAC WITH - Bulk |
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