參數(shù)資料
型號: LTC1090MJ
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: Single Chip 10-Bit Data Acquisition System
中文描述: 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
封裝: HERMETIC SEALED, CERDIP-20
文件頁數(shù): 6/28頁
文件大小: 344K
代理商: LTC1090MJ
6
LTC1090
1090fc
PIU
#
PIN
FUNCTION
DESCRIPTION
1-8
9
CH0 to CH7
COM
Analog Inputs
Common
The analog inputs must be free of noise with respect to AGND.
The common pin defines the zero reference point for all single ended inputs. It must be free
of noise and is usually tied to the analog ground plane.
This is the ground for the internal logic. Tie to the ground plane.
AGND should be tied directly to the analog ground plane.
Tie V
to most negative potential in the circuit. (Ground in single supply applications.)
The reference inputs must be kept free of noise with respect to AGND.
A logic low on this input enables data transfer.
The A/D conversion result is shifted out of this output.
The A/D configuration word is shifted into this input.
This clock synchronizes the serial data transfer.
This clock controls the A/D conversion process.
This supply must be kept free of noise and ripple by bypassing directly to the analog ground
plane.
10
11
12
13,14
15
16
17
18
19
20
DGND
AGND
V
REF
, REF
+
CS
D
OUT
D
IN
SCLK
ACLK
V
CC
Digital Ground
Analog Ground
Negative Supply
Reference Inputs
Chip Select Input
Digital Data Output
Data Input
Shift Clock
A/D Conversion Clock
Positive Supply
BLOCK DIAGRA
D
IN
17
D
OUT
16
SCLK
18
LTC1090 BD01
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
1
2
3
4
5
6
7
8
9
V
CC
20
INPUT SHIFT
REGISTER
OUTPUT
SHIFT
REGISTER
CS
15
ACLK
19
CONTROL
AND
TIMING
10-BIT
SAR
SAMPLE
AND HOLD
ANALOG
INPUT
MUX
COMP
REF–
13
10-BIT
CAPACITIVE
DAC
REF+
V–
12
AGND
11
DGND
10
14
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