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AD1555/56-REF Datenblatt(PDF) 22 Page - Analog Devices

Teilenummer AD1555/56-REF
Bauteilbeschribung  24-Bit - ADC with Low Noise PGA
PDF  24 Pages
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD1555/56-REF Datenblatt(HTML) 22 Page - Analog Devices

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REV. B
AD1555/AD1556
–22–
Table VIII. Status Register Data Bits
Bit
Number
Name
Description
RESET State
DB23 (MSB)
ERROR
Detects One of the Following Errors
0
DB22
OVWR
Read Sequence Overwrite Error
0
DB21
MFLG
Modulator Flag Error
MFLG
DB20
X
X
DB19
ACC
Accumulator Error
0
DB18
DRDY
Data Ready
0
DB17
FLSTL
Filter Settled
0
DB16
DRNG
Output Data Not within AD1555 Range
0
DB15
X
X
DB14
X
X
DB13
X
X
DB12
X
X
DB11
PWRDN
Power-Down Mode
PWRDN
DB10
CSEL
Select TDATA Input
CSEL
DB9
X
X
DB8
BW2
Filter Bandwidth Selection
BW2
DB7
BW1
Filter Bandwidth Selection
BW1
DB6
BW0
Filter Bandwidth Selection
BW0
DB5
X
X
DB4
CB4
PGA Input Select
PGA4
DB3
CB3
PGA Input Select
PGA3
DB2
CB2
PGA Gain Select
PGA2
DB1
CB1
PGA Gain Select
PGA1
DB0 (LSB)
CB0
PGA Gain Select
PGA0
The AD1555 has three different ground pins: AGND1, AGND2,
and AGND3 plane, depending on the configuration. AGND1
should be a star point and be connected to the analog ground
point. AGND2 should be directly tied to AGND1. A low
impedance trace should connect in the following order: AGND3,
the low side of the reference decoupling capacitor on REFCAP1,
the ground of the reference voltage, and return to AGND1.
Evaluating the AD1555/AD1556 Performance
Performances of the AD1555/AD1556 can be evaluated with
the evaluation board EVAL-AD1555/AD1556EB. The evaluation
board package includes a fully assembled and tested evaluation
board, documentation, and software for controlling the board
from a PC via the PC printer port.



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