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參數(shù)資料
| 型號： | MAX1200AEMH |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | +5v sINGLE-sUPPLY, 1mSPS, 16-bIT sELF-cALIBRATING adc |
| 中文描述： | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | M0-108AA-2, MQFP-44 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 204K |
| 代理商： | MAX1200AEMH |
M
+5V S ingle-S upply, 1Msps, 16-Bit
S elf-Calibrating ADC
______________________________________________________________________________________
13
The MAX1200 has three power-supply inputs: analog
V
DD
(AV
DD
), digital V
DD
(DV
DD
), and drive V
DD
(DRV
DD
). Each AV
DD
input should be decoupled with
parallel ceramic chip capacitors of values 0.1μF and
0.001μF, with these capacitors as close to the pin as
possible and with the shortest possible connection to
the ground plane. The DV
DD
pins should also have
separate 0.1μF capacitors again adjacent to their
respective pins, as should the DRV
DD
pin. Minimize the
digital load capacitance. However, if the total load
capacitance on each digital output exceeds 20pF, the
DRV
DD
decoupling capacitor should be increased or,
preferably, digital buffers should be added.
The power-supply voltages should also be decoupled
with large tantalum or electrolytic capacitors at the
point they enter the PCB. Ferrite beads with additional
decoupling capacitors forming a pi network may
improve performance.
The analog power-supply input (AV
DD
) for the
MAX1200 is typically +5V while the digital supplies can
vary from +3V to +5V. Usually, DV
DD
and DRV
DD
pins
are connected to the same power supply. Note that the
DV
DD
supply voltage must be greater than or equal to
the DRV
DD
voltage. For example, a digital +3.3V sup-
ply could be connected to DRV
DD
while a cleaner +5V
supply is connected to DV
DD
, resulting in slightly
improved performance. Alternatively, the +3.3V supply
could be connected to both DRV
DD
and DV
DD
.
However, the +3.3V supply must
not
be connected to
DV
DD
while the +5V supply is connected to DRV
DD
(Table 2).
Table 2. Power-Supply Voltage
Combinations
AV
DD
(V)
(V)
Chip Information
TRANSISTOR COUNT: 56,577
SUBSTRATE CONNECTED TO AGND
DV
DD
DRV
DD
(V)
ALLOWED/
NOT ALLOWED
+5
+5
+5
+5
+5
+3.3
+5
+3.3
+3.3
Allowed
Allowed
Allowed
+5
+3.3
+5
Not
Allowed
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|---|---|
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