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参数资料
| 型号： | ADC08100CIMTX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | ADC |
| 英文描述： | 8-Bit, 20 MSPS to 100 MSPS, 1.3 mW/MSPS A/D Converter |
| 中文描述： | 1-CH 8-BIT RESISTANCE LADDER ADC, PARALLEL ACCESS, PDSO24 |
| 封装： | TSSOP-24 |
| 文件页数： | 13/19页 |
| 文件大小： | 572K |
| 代理商： | ADC08100CIMTX |
Timing Diagram
Functional Description
The ADC08100 uses a new, unique architecture that
achieves over 7 effective bits at input frequencies up to and
beyond 50 MHz.
The analog input signal that is within the voltage range set by
V
RT
and V
is digitized to eight bits. Input voltages below
V
will cause the output word to consist of all zeroes. Input
voltages above V
RB
will cause the output word to consist of
all ones.
Incorporating a switched capacitor bandgap, the ADC08100
exhibits a power consumption that is proportional to fre-
quency, limiting power consumption to what is needed at the
clock rate that is used. This and its excellent performance
over a wide range of clock frequencies makes it an ideal
choice as a single ADC for many 8-bit needs.
Data is acquired at the falling edge of the clock and the
digital equivalent of that data is available at the digital out-
puts 2.5 clock cycles plus t
OD
later. The ADC08100 will
convert as long as the clock signal is present. The device is
in the active state when the Power Down pin (PD) is low.
When the PD pin is high, the device is in the power down
mode, where the output pins hold the last conversion before
the PD pin went high and the device consumes just 1 mW.
Applications Information
1.0 REFERENCE INPUTS
The reference inputs V
and V
are the top and bottom of
the reference ladder, respectively. Input signals between
these two voltages will be digitized to 8 bits. External volt-
ages applied to the reference input pins should be within the
range specified in the Operating Ratings table (1.0V to (V
+
0.1V) for V
and 100 mV to (V
1.0V) for V
). Any
device used to drive the reference pins should be able to
source sufficient current into the V
RT
pin and sink sufficient
current from the V
RB
pin.
10137131
FIGURE 1. ADC08100 Timing Diagram
A
www.national.com
13
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