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ADS7828 数据表(PDF) 4 Page - Texas Instruments

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部件名 ADS7828
功能描述  12-Bit, 8-Channel Sampling ANALOG-TO-DIGITAL CONVERTER with I2C??Interface
PDF  17 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

ADS7828 数据表(HTML) 4 Page - Texas Instruments

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ADS7828
4
SBAS181B
www.ti.com
DIGITAL INPUT/OUTPUT
Logic Family
CMOS
✻
Logic Levels:
VIH
+VDD • 0.7
+VDD + 0.5
✻✻
V
VIL
–0.3
+VDD • 0.3
✻✻
V
VOL
Min. 3mA Sink Current
0.4
✻
V
Input Leakage: I
IH
V
IH = +VDD +0.5
10
✻
µA
I
IL
V
IL = -0.3
-10
✻
µA
Data Format
Straight
✻
Binary
ADS7828 HARDWARE ADDRESS
10010
✻
Binary
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage, +VDD
Specified Performance
4.75
5
5.25
✻✻
V
Quiescent Current
High Speed Mode: SCL = 3.4MHz
750
1000
✻✻
µA
Fast Mode: SCL = 400kHz
300
✻
µA
Standard Mode, SCL = 100kHz
150
✻
µA
Power Dissipation
High Speed Mode: SCL = 3.4MHz
3.75
5
✻✻
mW
Fast Mode: SCL = 400kHz
1.5
✻
mW
Standard Mode, SCL = 100kHz
0.75
✻
mW
Power-Down Mode
High Speed Mode: SCL = 3.4MHz
400
✻
µA
w/Wrong Address Selected
Fast Mode: SCL = 400kHz
150
✻
µA
Standard Mode, SCL = 100kHz
35
✻
µA
Full Power-Down
SCL Pulled HIGH, SDA Pulled HIGH
400
3000
✻✻
nA
TEMPERATURE RANGE
Specified Performance
–40
85
✻✻
°C
ELECTRICAL CHARACTERISTICS: +5V (Cont.)
At TA = –40°C to +85°C, +VDD = +5.0V, VREF = External +5.0V, SCL Clock Frequency = 3.4MHz (High-Speed Mode), unless otherwise noted.
ADS7828E
ADS7828EB
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
PIN CONFIGURATION
Top View
TSSOP
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
CH0
Analog Input Channel 0
2
CH1
Analog Input Channel 1
3
CH2
Analog Input Channel 2
4
CH3
Analog Input Channel 3
5
CH4
Analog Input Channel 4
6
CH5
Analog Input Channel 5
7
CH6
Analog Input Channel 6
8
CH7
Analog Input Channel 7
9
GND
Analog Ground
10
REFIN / REFOUT Internal +2.5V Reference, External Reference Input
11
COM
Common to Analog Input Channel
12
A0
Slave Address Bit 0
13
A1
Slave Address Bit 1
14
SCL
Serial Clock
15
SDA
Serial Data
16
+VDD
Power Supply, 3.3V Nominal
TIMING DIAGRAM
1
2
3
4
5
6
7
8
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
+V
DD
SDA
SCL
A1
A0
COM
REF
IN / REFOUT
GND
16
15
14
13
12
11
10
9
ADS7828
t
R
t
BUF
t
LOW
t
F
t
HD; STA
t
SP
t
HD; STA
t
SU; STA
t
HD; DAT
t
SU; DAT
t
HIGH
t
SU; STO
SCL
SDA
START
REPEATED
START
STOP
✻ Specifications same as ADS7828E.
NOTES: (1) LSB means Least Significant Bit. With VREF equal to 5.0V, 1LSB is 1.22mV. (2) THD measured out to the 9th-harmonic.



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