參數(shù)資料
型號(hào)： AS1523-T
廠商： AUSTRIAMICROSYSTEMS AG
元件分類： ADC
英文描述： 10-Bit, 4-Ch, 300ksps, ADC; Package Type: TSSOP-16
封裝： TSSOP-16
文件頁數(shù)： 18/28頁
文件大小： 893K
代理商： AS1523-T
www.austriamicrosystems.com
Revision 1.00
18 - 28
AS1522/AS1523
Data Sheet
- Detailed Description
Figure 23. Detailed Serial Interface Timing Waveforms
The external serial clock shifts data in and out of the devices and drives the analog-to-digital conversion steps. Two
clock periods after the last bit of the control byte is written the output pin SSTRB pulses high for one clock period.
The serial data is shifted out at DOUT on each of the next 10 SCLK rising edges (see
Figure 21 on page 17
).
Pins SSTRB and DOUT go into a high-impedance state when CSN goes high. The conversion must complete in 120μs
or less, or consequently, droop on the sample-and-hold capacitors may degrade conversion results.
Figure 23
shows
detailed serial-interface timing waveforms.
Transfer Functions
Output coding and transfer function depend on the control register bits
MODE (page 15)
and
RANGE (page 15)
.
Figure 24. Straight Binary Transfer Function for
RANGE = 1 and MODE = 1
Figure 25. Straight Binary Transfer Function for
RANGE = 0 and MODE = 1
t
DH
CSN
SCLK
DIN
SSTRB
DOUT
t
CSS
t
CP
t
CSW
t
CSO
t
CL
t
CH
t
DOH
t
DOV
t
DOD
t
STD
t
STH
t
DS
t
DOE
t
STE
t
STV
11...111
11...1110
11....101
00...011
00...010
00...001
00...000
O
0
1
2
3
Input Voltage AIN+ - AIN- (LSB)
FS - 3/2LSB
Full Scale (FS)
Transition
Full Scale = V
REF
Zero Scale = 0
1LSB = V
REF
/1024
11...111
11...1110
11....101
00...011
00...010
00...001
00...000
O
ZS ZS+1LSB
Input Voltage AIN+ - AIN- (LSB)
FS - 3/2LSB
Full Scale (FS)
Transition
Full Scale = +V
REF
/2
Zero Scale = -V
REF
/2
1LSB = V
REF
/1024
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