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參數(shù)資料
| 型號(hào)： | MM74C905 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 12-Bit Successive Approximation Register |
| 中文描述： | 12位逐次逼近寄存器 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 72K |
| 代理商： | MM74C905 |
www.fairchildsemi.com
6
M
Switching Time Waveforms
USER NOTES FOR A/D CONVERSION
The register can be used with either current switches that
require a low voltage level to turn the switch ON or current
switches that require a high voltage level to turn the switch
ON. If current switches are used which turn ON with a low
logic level, the resulting digit output from the register is
active low. That is, a logic “1” is represented as a low volt-
age level. If current switches are used which turn ON with a
high logic level, the resulting digit output is active high. A
logic “1” is represented as a high voltage level.
For a maximum error of
±
LSB, the comparator must be
biased. If current switches that require a high voltage level
to turn ON are used, the comparator should be biased
+
LSB and if the current switches require a low logic level to
turn ON, then the comparator must be biased
LSB.
The register can be used to perform 2's complement con-
version by offsetting the comparator one half full range
+
LSB and using the complement of the MSB Q11 as the sign
bit.
If the register is truncated and operated in the continuous
conversion mode, a lock-up condition may occur on power-
ON. This situation can be overcome by making the START
input the “OR” function of CC and the appropriate register
output.
The register, by suitable selection of register ladder net-
work, can be used to perform either binary or BCD conver-
sion.
The register outputs can drive the 10 bits or less with 50k/
100k R/2R ladder network directly for V
CC
=
10V or higher.
In order to drive the 12-bit 50k/100k ladder network and
have the
±
LSB resolution, the MM74C902 or
MM74C904 is used as buffers, three buffers for MSB
(Q11), two buffers for Q10, and one buffer for Q9.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MM74C905N | 12-Bit Successive Approximation Register |
| MM74C907 | Hex Open Drain N-Channel Buffers . Hex Open Drain P-Channel Buffers |
| MM74C906 | Hex Open Drain N, P-Channel Buffers |
| MM74C906 | Hex Open Drain N-Channel Buffers . Hex Open Drain P-Channel Buffers |
| MM74C906M | Hex Open Drain N-Channel Buffers . Hex Open Drain P-Channel Buffers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM74C905N | 功能描述:寄存器 12-Bit Suc App Reg RoHS:否 制造商:NXP Semiconductors 邏輯類(lèi)型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時(shí)鐘頻率:36 MHz 傳播延遲時(shí)間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
| MM74C905N_Q | 功能描述:寄存器 12-Bit Suc App Reg RoHS:否 制造商:NXP Semiconductors 邏輯類(lèi)型:CMOS 邏輯系列:HC 電路數(shù)量:1 最大時(shí)鐘頻率:36 MHz 傳播延遲時(shí)間: 高電平輸出電流:- 7.8 mA 低電平輸出電流:7.8 mA 電源電壓-最大:6 V 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-38 封裝:Tube |
| MM74C906 | 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:Hex Open Drain N-Channel Buffers . Hex Open Drain P-Channel Buffers |
| MM74C906M | 功能描述:緩沖器和線(xiàn)路驅(qū)動(dòng)器 Hex N-Chan Buffer RoHS:否 制造商:Micrel 輸入線(xiàn)路數(shù)量:1 輸出線(xiàn)路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| MM74C906M | 制造商:Fairchild Semiconductor Corporation 功能描述:BUFFER LOGIC IC |
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