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參數(shù)資料
| 型號： | ADC12062BIVF |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | ADC |
| 英文描述： | 12-Bit, 1 MHz, 75 mW A/D Converter |
| 中文描述： | 2-CH 12-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 355K |
| 代理商： | ADC12062BIVF |
Applications Information
(Continued)
edge) of an MM74HC4538 one-shot. The 1k resistor and 12
pF capacitor set the pulse length to approximately 100 ns.
The S/H pulse stream for the converter appears on the Q
output of the HC4538. This is the S/H clock generator used
on the ADC12062EVAL evaluation board. For lower power,
a CMOS inverter-based crystal oscillator can be used in
place of the DIP crystal oscillator. See Application Note
AN-340 in the National Semiconductor CMOS Logic Data-
book for more information on CMOS crystal oscillators.
8.0 COMMON APPLICATION PITFALLS
Driving inputs (analog or digital) outside power supply
rails.
The Absolute Maximum Ratings state that all inputs
must be between GND
b
300 mV and V
CC
a
300 mV. This
rule is most often broken when the power supply to the
converter is turned off, but other devices connected to it (op
amps, microprocessors) still have power. Note that if there
is no power to the converter, DGND
e
AGND
e
DV
CC
e
AV
CC
e
0V, so all inputs should be within
g
300 mV of
AGND and DGND.
Driving a high capacitance digital data bus.
The more
capacitance the data bus has to charge for each conver-
sion, the more instantaneous digital current required from
DV
CC
and DGND. These large current spikes can couple
back to the analog section, decreasing the SNR of the con-
verter. While adequate supply bypassing and separate ana-
log and digital ground planes will reduce this problem, buff-
ering the digital data outputs (with a pair of MM74HC541s,
for example) may be necessary if the converter must drive a
heavily loaded databus.
9.0 APPLICATIONS
2’s Complement Output
TL/H/11490–24
Ping-Ponging between V
IN1
and V
IN2
TL/H/11490–25
17
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADC12062CIV | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit, 1 MHz, 75 mW A/D Converter |
| ADC12062CIVF | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit, 1 MHz, 75 mW A/D Converter |
| ADC12062EVAL | 功能描述:BOARD EVALUATION FOR ADC12062 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| ADC1206S040 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single 12 bits ADC, up to 40 MHz, 55 MHz or 70 MHz |
| ADC1206S040/DB | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADC DEMO BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
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