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ADS1218 bảng dữ liệu(PDF) 4 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory
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ADS1218 bảng dữ liệu(HTML) 4 Page - Texas Instruments

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ADS1218
SBAS187C – SEPTEMBER 2001 – REVISED SEPTEMBER 2005
ELECTRICAL CHARACTERISTICS: AV
DD = 5V (continued)
All specifications T
MIN to TMAX, AVDD = +5V, DVDD = +2.7V to 5.25V, fMOD = 19.2kHz, fOSC = 2.4576MHz, PGA = 1, Buffer On,
R
DAC = 150kΩ, VREF ≡ (REF IN+) – (REF IN–) = +2.5V, and fDATA = 10Hz, unless otherwise specified.
ADS1218
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
ON-CHIP VOLTAGE REFERENCE
Output Voltage
REF HI = 1 at +25°C
2.495
2.50
2.505
V
REF HI = 0
1.25
V
Short-Circuit Current Source
8
mA
Short-Circuit Current Sink
50
µA
Short-Circuit Duration
Sink or Source
Indefinite
Drift
5
ppm/°C
Noise
BW = 0.1Hz to 100Hz
10
µVPP
Output Impedance
Sourcing 100µA
3
Startup Time
50
µs
IDAC
Full-Scale Output Current
RDAC = 150kΩ, Range = 1
0.5
mA
RDAC = 150kΩ, Range = 2
1
mA
RDAC = 150kΩ, Range = 3
2
mA
RDAC = 15kΩ, Range = 3
20
mA
Maximum Short-Circuit Current Duration
RDAC = 10kΩ
Indefinite
RDAC = 0Ω
10
Minutes
Monotonicity
RDAC = 150kΩ
8
Bits
Compliance Voltage
0
AVDD – 1
V
Output Impedance
See Typical Characteristics
PSRR
VOUT = AVDD/2
400
ppm/V
Absolute Error
Individual IDAC
5
%
Absolute Drift
Individual IDAC
75
ppm/°C
Mismatch Error
Between IDACs, Same Range and Code
0.25
%
Mismatch Drift
Between IDACs, Same Range and Code
15
ppm/°C
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage
AVDD
4.75
5.25
V
Analog Current (IADC + IVREF + IDAC)
PDWN = 0, or SLEEP
1
nA
ADC Current (IADC)
PGA = 1, Buffer Off
175
275
µA
PGA = 128, Buffer Off
500
750
µA
PGA = 1, Buffer On
250
350
µA
PGA = 128, Buffer On
900
1375
µA
VREF Current (IVREF)
250
375
µA
IDAC Current (IDAC)
Excludes Load Current
480
675
µA
Digital Current
Normal Mode, DVDD = 5V
180
275
µA
SLEEP Mode, DVDD = 5V
150
µA
Read Data Continuous Mode, DVDD = 5V
230
µA
PDWN = Low
1
nA
PGA = 1, Buffer Off, REFEN = 0,
Power Dissipation
1.8
2.8
mW
IDACS Off, DVDD = 5V
TEMPERATURE RANGE
Operating
–40
+85
°C
Storage
–60
+100
°C
4


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