Datasheet
ADS1113
ADS1114
ADS1115
www.ti.com
SBAS444B –MAY 2009–REVISED OCTOBER 2009
ELECTRICAL CHARACTERISTICS
All specifications at –40°C to +125°C, VDD = 3.3V, and Full-Scale (FS) = ±2.048V, unless otherwise noted.
Typical values are at +25°C.
ADS1113, ADS1114, ADS1115
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUT
Full-scale input voltage
(1)
V
IN
= (AIN
P
) – (AIN
N
) ±4.096/PGA V
Analog input voltage AIN
P
or AIN
N
to GND GND VDD V
Differential input impedance See Table 2
FS = ±6.144V
(1)
10 MΩ
FS = ±4.096V
(1)
, ±2.048V 6 MΩ
Common-mode input impedance
FS = ±1.024V 3 MΩ
FS = ±0.512V, ±0.256V 100 MΩ
SYSTEM PERFORMANCE
Resolution No missing codes 16 Bits
8, 16, 32,
64, 128,
Data rate (DR) SPS
250, 475,
860
Data rate variation All data rates –10 10 %
Output noise See Typical Characteristics
Integral nonlinearity DR = 8SPS, FS = ±2.048V, best fit
(2)
1 LSB
FS = ±2.048V, differential inputs ±1 ±3 LSB
Offset error
FS = ±2.048V, single-ended inputs ±3 LSB
Offset drift FS = ±2.048V 0.005 LSB/°C
Offset power-supply rejection FS = ±2.048V 1 LSB/V
Gain error
(3)
FS = ±2.048V at 25°C 0.01 0.15 %
FS = ±0.256V 7 ppm/°C
Gain drift
(3)
FS = ±2.048V 5 40 ppm/°C
FS = ±6.144V
(1)
5 ppm/°C
Gain power-supply rejection 80 ppm/V
PGA gain match
(3)
Match between any two PGA gains 0.02 0.1 %
Gain match Match between any two inputs 0.05 0.1 %
Offset match Match between any two inputs 3 LSB
At dc and FS = ±0.256V 105 dB
At dc and FS = ±2.048V 100 dB
Common-mode rejection At dc and FS = ±6.144V
(1)
90 dB
f
CM
= 60Hz, DR = 8SPS 105 dB
f
CM
= 50Hz, DR = 8SPS 105 dB
DIGITAL INPUT/OUTPUT
Logic level
V
IH
0.7VDD 5.5 V
V
IL
GND – 0.5 0.3VDD V
V
OL
I
OL
= 3mA GND 0.15 0.4 V
Input leakage
I
H
V
IH
= 5.5V 10 μA
I
L
V
IL
= GND 10 μA
(1) This parameter expresses the full-scale range of the ADC scaling. In no event should more than VDD + 0.3V be applied to this device.
(2) 99% of full-scale.
(3) Includes all errors from onboard PGA and reference.
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Product Folder Link(s): ADS1113 ADS1114 ADS1115