Datasheet

ADS1110
SBAS276A − MARCH 2003 − REVISED NOVEMBER 2003
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3
ELECTRICAL CHARACTERISTICS
All specifications at −40°C to +85°C, V
DD
= 5V, and all PGAs, unless otherwise noted.
ADS1110
PARAMETER CONDITIONS
MIN TYP MAX
UNIT
ANALOG INPUT
Full-Scale Input Voltage (V
IN+
) − (V
IN−
) ±2.048/PGA V
Analog Input Voltage V
IN+
to GND or V
IN−
to GND GND − 0.2 V
DD
+ 0.2 V
Differential Input Impedance 2.8/PGA MΩ
Common-Mode Input Impedance PGA = 1 3.5 MΩ
PGA = 2 3.5 MΩ
PGA = 4 1.8 MΩ
PGA = 8 0.9 MΩ
SYSTEM PERFORMANCE
Resolution and No Missing Codes DR = 00 12 12 Bits
Resolution and No Missing Codes
DR = 01 14 14 Bits
DR = 10 15 15 Bits
DR = 11 16 16 Bits
Data Rate DR = 00 180 240 308 SPS
Data Rate
DR = 01 45 60 77 SPS
DR = 10 22 30 39 SPS
DR = 11 11 15 20 SPS
Output Noise See Typical Characteristic Curves
Integral Nonlinearity DR = 11, PGA = 1, End Point Fit
(1)
±0.004 ±0.010 % of FSR
(2)
Offset Error PGA = 1 1.2 8 mV
Offset Error
PGA = 2 0.7 4 mV
PGA = 4 0.5 2.5 mV
PGA = 8 0.4 1.5 mV
Offset Drift PGA = 1 1.2 µV/°C
Offset Drift
PGA = 2 0.6 µV/°C
PGA = 4 0.3 µV/°C
PGA = 8 0.3 µV/°C
Offset vs V
DD
PGA = 1 800 µV/V
Offset vs V
DD
PGA = 2 400 µV/V
PGA = 4 200 µV/V
PGA = 8 150 µV/V
Gain Error
(3)
0.05 0.40 %
PGA Gain Error Match
(3)
Match Between Any Two PGA Gains 0.02 0.10 %
Gain Error Drift
(3)
5 40 ppm/°C
Gain vs V
DD
80 ppm/V
Common-Mode Rejection At DC and PGA = 8 95 105 dB
Common-Mode Rejection
At DC and PGA = 1 100 dB
DIGITAL INPUT/OUTPUT
Logic Level
V
IH
0.7 • V
DD
6 V
V
IL
GND − 0.5 0.3 • V
DD
V
V
OL
I
OL
= 3mA GND 0.4 V
Input Leakage
I
H
V
IH
= 5.5V 10 µA
I
L
V
IL
= GND −10 µA
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage V
DD
2.7 5.5 V
Supply Current Power Down 0.05 2 µA
Supply Current
Active Mode 240 350 µA
Power Dissipation V
DD
= 5.0V 1.2 1.75 mW
Power Dissipation
V
DD
= 3.0V 0.675 mW
(1)
99% of full-scale.
(2)
FSR = full-scale range = 2 × 2.048V/PGA = 4.096V/PGA.
(3)
Includes all errors from onboard PGA and reference.