參數(shù)資料
型號(hào)： AS1545-BQFT
廠商： AUSTRIAMICROSYSTEMS AG
元件分類： ADC
英文描述： Dual 12-bit, 12-CH, 1Msps; Package Type: TQFN(5x5)-32
封裝： TQFN(5x5)-32
文件頁(yè)數(shù)： 24/34頁(yè)
文件大小： 1587K
代理商： AS1545-BQFT
www.austriamicrosystems.com
Revision 1.01
24 - 34
AS1545
Datasheet - Detailed Description
Figure 42. Straight Binary Transfer Function for
Single-Ended, RANGE = 0
Figure 43. Straight Binary Transfer Function for
Single-Ended, RANGE = 1
Figure 44. Two’s Complement Transfer Function for
Differential, RANGE = 0
Figure 45. Two’s Complement Transfer Function for
Differential, RANGE = 1
Digital Inputs
V
DRIVE
Functionality
The AS1545 also has a V
DRIVE
feature to control the voltage at which the serial interface operates and allows the ADC
to easily interface to both 3V and 5V processors. For example, if the AS1545 was operated with a V
DD
of 5V, the
V
DRIVE
pin could be powered from a 3V supply, allowing a large dynamic range with low voltage digital processors.
Therefore, the AS1545 could be used with the 2 × V
REF
input range, with a V
DD
of 5V while still being able to interface
to 3V digital parts.
11...111
11...110
11....101
00...011
00...010
00...001
00...000
11...111
11...110
11....101
00...011
00...010
00...001
00...000
O
0
1
2
3
Input Voltage V
INx
(LSB)
FS - 3/2LSB
Full Scale = V
REF
Zero Scale = 0
1LSB = V
REF
/4096
O
0 1 2 3
Input Voltage V
INx
- V
INy
(LSB)
FS - 3/2LSB
Full Scale
(FS)
Transition
Full Scale = +2V
REF
Zero Scale = 0
1LSB = V
REF
/4096
Full Scale
(FS)
Transition
011....111
011...110
000...010
000...001
000...000
111...111
111...110
111...101
100...001
100...000
O
-FS
ZS
Input Voltage V
INx
(LSB)
+FS - 1LSB
011....111
011...110
000...010
000...001
000...000
111...111
111...110
111...101
100...001
100...000
O
-FS
ZS
Input Voltage V
INx
- V
INy
(LSB)
+FS - 1LSB
Full Scale = V
REF
/2
Zero Scale = -V
REF
/2
1LSB = V
REF
/4096
Full Scale = +V
REF
Zero Scale = -V
REF
1LSB = V
REF
/4096
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