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ADS1118IDGST Datasheet(PDF) 3 Page - Texas Instruments

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Part No. ADS1118IDGST
Description  Ultra-Small, Low-Power, SPI-Compatible, 16-Bit Analog-to-Digital Converter and Temperature Sensor with Internal Reference
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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ADS1118IDGST Datasheet(HTML) 3 Page - Texas Instruments

 
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ADS1118
www.ti.com
SBAS457A
– OCTOBER 2010 – REVISED JULY 2011
ELECTRICAL CHARACTERISTICS
Maximum/minimum specifications at
–40°C to +125°C, VDD = 3.3V, data rate = 8SPS, and full-scale (FS) = ±2.048V, unless
otherwise noted. Typical values are at +25
°C, VDD = 3.3V, data rate = 8SPS, and full-scale (FS) = ±2.048V, unless otherwise
noted.
ADS1118
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Full-scale input voltage(1)
VIN = (AINP) – (AINN)
±4.096/PGA
V
Analog input voltage
AINP or AINN to GND
GND
VDD
V
Differential input impedance
See Table 1
FS =
±6.144V(1)
8
M
FS =
±4.096V(1), ±2.048V
6
M
Common-mode input impedance
FS =
±1.024V
3
M
FS =
±0.512V, ±0.256V
100
M
SYSTEM PERFORMANCE
Resolution
No missing codes
16
Bits
Data rate (DR)
8, 16, 32, 64, 128, 250, 475, 860
SPS
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
±0.1
±2
LSB
Offset error
FS =
±2.048V, single-ended inputs
±0.25
LSB
Offset drift
FS =
±2.048V
0.002
LSB/
°C
Offset power-supply rejection
FS =
±2.048V, with dc supply variation
0.2
LSB/V
Gain error(3)
FS =
±2.048V at +25°C
0.01
0.15
%
FS =
±0.256V
7
ppm/
°C
Gain drift(3)(4)
FS =
±2.048V
5
40
ppm/
°C
FS =
±6.144V(1)
5
ppm/
°C
Gain power-supply rejection
10
ppm/V
PGA gain match(3)
Match between any two PGA gains
0.01
0.1
%
Gain match
Match between any two inputs
0.01
0.1
%
Offset match
Match between any two inputs
0.6
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
fCM = 60Hz, DR = 860SPS
105
dB
fCM = 50Hz, DR = 860SPS
105
dB
TEMPERATURE SENSOR
Temperature sensor range
–40
+125
°C
Temperature sensor resolution
0.03125
°C/LSB
0
°C to +70°C
0.2
±0.5
°C
Temperature sensor accuracy
–40°C to +125°C
0.4
±1
°C
vs supply
0.03125
±0.25
°C/V
(1)
This parameter expresses the full-scale range of the ADC scaling. In no event should more than the smaller of VDD + 0.3V or 5.5V be
applied to this device.
(2)
Best fit INL covers 99% of full-scale.
(3)
Includes all errors from onboard PGA and reference.
(4)
Not production tested; ensured by characterization.
Copyright
© 2010–2011, Texas Instruments Incorporated
3


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