參數(shù)資料
型號(hào)： MAX1201
廠商： Maxim Integrated Products, Inc.
英文描述： Scan Test Devices With 18-Bit Bus Transceivers 56-TSSOP -40 to 85
中文描述： +5V、單電源、2.2Msps、14位自校準(zhǔn)ADC
文件頁(yè)數(shù)： 13/16頁(yè)
文件大?。?/td> 187K
代理商： MAX1201
M
+5V S ingle-S upply, 2.2Msps, 14-Bit
S elf-Calibrating ADC
______________________________________________________________________________________
13
The MAX1201 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 the voltages enter the PCB. Ferrite beads with
additional decoupling capacitors forming a pi network
could also improve performance.
The analog power-supply input (AV
DD
) for the
MAX1201 is typically +5V, while the digital supplies
can vary from +5V to +3V. 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 supply 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 should
not
be connected to
DV
DD
while the +5V supply is connected to DRV
DD
(Table 2).
Table 2. Power-Supply-Voltage
Combinations
Chip Information
TRANSISTOR COUNT: 56,577
SUBSTRATE CONNECTED TO AGND
AV
DD
(V)
DV
DD
(V)
DRV
DD
(V)
ALLOWED/
NOT ALLOWED
5
5
5
5
5
5
Allowed
Allowed
Allowed
3.3
3.3
3.3
5
3.3
5
Not
Allowed
相關(guān)PDF資料
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MAX1201CMH +5v sINGLE-sUPPLY, 2.2mSPS, 14-bIT sELF-cALIBRATING adc
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