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ADS1217IPFBRG4 bảng dữ liệu(PDF) 3 Page - Texas Instruments

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ADS1217
SBAS260C
3
www.ti.com
ELECTRICAL CHARACTERISTICS: AVDD = 5V (Cont.)
All specifications at –40
°C to +85°C, AV
DD = +5V, DVDD = +2.7V to 5.25V, fMOD = 19.2kHz, PGA = 1, Buffer ON, RDAC = 150kΩ, fDATA = 10Hz, and VREF = +2.5V,
unless otherwise specified.
ADS1217
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VOLTAGE REFERENCE INPUT
Reference Input (VREF)VREF ≡ (VREF+) – (VREF–)
0.1
2.5
2.6
V
Negative Reference Input (VREF–)
AGND – 0.1
(VREF+) – 0.1
V
Positive Reference Input (VREF+)(VREF–) + 0.1
AVDD + 0.1
V
Common-Mode Rejection
at DC
120
dB
Common-Mode Rejection
fVREFCM = 60Hz, fDATA = 60Hz
120
dB
Bias Current(3)
VREF = 2.5V, PGA = 1
1.3
µA
ON-CHIP VOLTAGE REFERENCE
Output Voltage
REF HI = 1
2.4
2.5
2.6
V
REF HI = 0
1.25
V
Short-Circuit Current Source
8mA
Short-Circuit Current Sink
50
µA
Drift
15
ppm/
°C
Noise
VRCAP = 0.1µF, BW = 0.1Hz to 100Hz
10
µVrms
Output Impedance
Sourcing 100
µA3
Startup Time
5ms
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
Current Setting Resistance (RDAC)10
k
Monotonicity
RDAC = 150kΩ
8
Bits
Compliance Voltage
0AVDD – 1V
Output Impedance
See Typical Characteristics
PSRR
VOUT = AVDD/2, Code > 16
400
ppm/V
Gain Error
Individual IDAC
5
%
Gain Error Drift
Individual IDAC
75
ppm/
°C
Gain Error Mismatch
Between IDACs, Same Range and Code
0.25
%
Gain Error 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 + IIDAC)
PDWN = 0, or SLEEP
1
nA
A/D Converter 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
IIDAC Current (IIDAC)
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 = 0
1
nA
Power Dissipation
PGA = 1, Buffer OFF, REFEN = 0,
1.8
2.8
mW
IDACs OFF, DVDD = 5V
NOTES: (1) FSR is Full-Scale Range. (2)
∆V
OUT is change in digital result. (3) 12pF switched capacitor at fSAMP clock frequency.


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