ELECTRICAL CHARACTERISTICS: AVDD = 5V (Cont.)
All specifications at –40°C to +85°C, AVDD = +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
Negative Reference Input (VREF–
Positive Reference Input (VREF+
Common-Mode Rejection
Common-Mode Rejection
Bias Current(3)
)
VREF ≡ (VREF+) – (VREF–
)
0.1
2.5
2.6
V
V
V
dB
dB
µA
)
AGND – 0.1
(VREF–) + 0.1
(VREF+) – 0.1
AVDD + 0.1
)
at DC
120
120
1.3
fVREFCM = 60Hz, fDATA = 60Hz
VREF = 2.5V, PGA = 1
ON-CHIP VOLTAGE REFERENCE
Output Voltage
REF HI = 1
REF HI = 0
2.4
2.5
1.25
8
50
15
10
3
2.6
V
V
mA
Short-Circuit Current Source
Short-Circuit Current Sink
Drift
Noise
Output Impedance
Startup Time
µA
ppm/°C
µVrms
Ω
VRCAP = 0.1µF, BW = 0.1Hz to 100Hz
Sourcing 100µA
5
ms
IDAC
Full-Scale Output Current
RDAC = 150kΩ, Range = 1
RDAC = 150kΩ, Range = 2
RDAC = 150kΩ, Range = 3
RDAC = 15kΩ, Range = 3
0.5
1
2
mA
mA
mA
mA
kΩ
Bits
V
20
Current Setting Resistance (RDAC
Monotonicity
Compliance Voltage
Output Impedance
PSRR
)
10
8
0
RDAC = 150kΩ
AVDD – 1
See Typical Characteristics
VOUT = AVDD/2, Code > 16
Individual IDAC
400
5
ppm/V
%
Gain Error
Gain Error Drift
Gain Error Mismatch
Gain Error Mismatch Drift
Individual IDAC
Between IDACs, Same Range and Code
Between IDACs, Same Range and Code
75
0.25
15
ppm/°C
%
ppm/°C
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage
AVDD
4.75
5.25
V
Analog Current (IADC + IVREF + IIDAC)
PDWN = 0, or SLEEP
PGA = 1, Buffer OFF
PGA = 128, Buffer OFF
PGA = 1, Buffer ON
PGA = 128, Buffer ON
1
nA
µA
µA
µA
µA
µA
µA
A/D Converter Current (IADC
)
175
500
250
900
250
480
275
750
350
1375
375
675
VREF Current (IVREF
)
IIDAC Current (IIDAC
)
Excludes Load Current
Digital Current
Normal Mode, DVDD = 5V
SLEEP Mode, DVDD = 5V
Read Data Continuous Mode, DVDD = 5V
PDWN = 0
180
150
230
1
275
µA
µA
µA
nA
Power Dissipation
PGA = 1, Buffer OFF, REFEN = 0,
IDACs OFF, DVDD = 5V
1.8
2.8
mW
NOTES: (1) FSR is Full-Scale Range. (2) ∆VOUT is change in digital result. (3) 12pF switched capacitor at fSAMP clock frequency.
ADS1217
SBAS260B
3
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