ADS1230
www.ti.com
SBAS366–OCTOBER 2006
ELECTRICAL CHARACTERISTICS
All specifications at TA = –40°C to +85°C, AVDD = DVDD = REFP = +5V, REFN = AGND, and Gain = 64, unless otherwise noted.
ADS1230
PARAMETER
Analog Inputs
CONDITIONS
MIN
TYP
±0.5VREF/PGA
±2
MAX
UNIT
Full-Scale Input Voltage (AINP – AINN)
Common-Mode Input Range
Differential Input Current
System Performance
V
V
AGND + 1.5V
AVDD – 1.5V
nA
Resolution
No Missing Codes
20
69.5
8.68
Bits
SPS
Internal Oscillator, SPEED = High
Internal Oscillator, SPEED = Low
External Oscillator, SPEED = High
External Oscillator, SPEED = Low
Full Settling
80
86.4
10.8
10
SPS
Data Rate
fCLK/61,440
SPS
fCLK/491,520
SPS
Digital Filter Settling Time
Integral Nonlinearity (INL)
4
±10
±6
Conversions
ppm
Differential Input, End-Point Fit, G = 64
Differential Input, End-Point Fit, G = 128
ppm
Input Offset Error(1)
Input Offset Drift
Gain Error
±3
ppm of FS
nV/°C
%
±10
±0.8
±4
Gain Drift
ppm/°C
dB
Internal Oscillator, fDATA = 10SPS
90
Normal-Mode Rejection(2)
External Oscillator, fDATA = 10SPS
fIN = 50Hz or 60Hz, ±1Hz
100
dB
Common-Mode Rejection
Input-Referred Noise
at DC, ∆VDD = 0.1V
fDATA = 10SPS
110
53
dB
nV, rms
nV, rms
dB
fDATA = 80SPS
100
100
Power-Supply Rejection
at DC, ∆VDD = 0.1V
90
Voltage Reference Input
Voltage Reference Input (VREF
)
VREF = REFP – REFN
1.5
AGND – 0.1
REFN + 1.5
AVDD
10
AVDD + 0.1V
REFP – 1.5
AVDD + 0.1
V
V
Negative Reference Input (REFN)
Positive Reference Input (REFP)
Voltage Reference Input Current
Digital
V
nA
All digital inputs except CLKIN
CLKIN
0.7 DVDD
0.7 DVDD
DGND
DVDD + 0.1
5.1
V
V
VIH
Logic Levels
VIL
0.2 DVDD
V
VOH
VOL
IOH = 1mA
DVDD – 0.4
V
IOL = 1mA
0.2 DVDD
V
Input Leakage
0 < VIN < DVDD
±10
6
µA
MHz
MHz
External Clock Input Frequency (fCLKIN
)
0.2
4.9152
Serial Clock Input Frequency (fSCLK
)
5
(1) Offset calibration can minimize these errors to the level of noise at any temperature.
(2) Specification is assured by the combination of design and final production test.
3
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