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ADS1262 Arkusz danych(PDF) 9 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Numer części ADS1262
Szczegółowy opis  ADS126x 32-Bit, Precision, 38-kSPS, Analog-to-Digital Converter
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Producent  TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]
Strona internetowa  http://www.taosinc.com
Logo TAOS - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

ADS1262 Arkusz danych(HTML) 9 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

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ADS1262, ADS1263
www.ti.com
SBAS661B – FEBRUARY 2015 – REVISED JULY 2015
Electrical Characteristics (continued)
Minimum and maximum specifications apply from TA = –40°C to +125°C. Typical specifications are at TA = 25°C.
All specifications are at VAVDD = 5 V, VAVSS = 0 V, VDVDD = 3.3 V, VREF = 2.5 V, fCLK = 7.3728 MHz, ADC1 data rate = 20 SPS
with PGA enabled and gain = 1, and ADC2 data rate = 10 SPS with gain = 1 (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CROSSTALK
ADC1 to ADC2
20
µV/V
Crosstalk
ADC2 to ADC1
1
µV/V
EXTERNAL VOLTAGE REFERENCE INPUTS
ADC1
150
nA
Reference input current(5)
ADC2
1
nA
Input current vs voltage
VREF = 2 V to 4.8 V, ADC1
10
nA/V
Input current drift
ADC1
0.1
nA/°C
Input impedance
Differential, ADC1
50
M
Ω
Low reference monitor
Threshold, ADC1
0.4
0.6
V
INTERNAL VOLTAGE REFERENCE
Reference voltage
2.5
V
Initial accuracy
TA = 25°C
±0.1%
±0.2%
TA = 0°C to +85°C
2
6
ppm/°C
Reference voltage temperature drift
TA = –40°C to +105°C
4
12
ppm/°C
Reference voltage long term drift
TA = 85°C, 1st 1000 hr
50
ppm
Thermal hysteresis
First 0°C to 85°C cycle
50
ppm
Output current
-10
10
mA
Load regulation
40
µV/mA
Start-up time
Settling time to ±0.001% final value
50
ms
TEMPERATURE SENSOR
Voltage
TA = 25°C
122.4
mV
Temperature coefficient
420
µV/°C
CURRENT SOURCES (IDAC1, IDAC2)
50, 100, 250, 500, 750,
Currents
µA
1000, 1500, 2000, 2500, 3000
Compliance range
All currents
VAVSS
VAVDD – 1.1
V
Absolute error
All currents
±0.7%
±4%
IDAC1 current = IDAC2 current
±0.1%
±1%
Match error
IDAC1 current
≠ IDAC2 current
±1%
Absolute
50
ppm/°C
Temperature drift
Match
5
20
ppm/°C
LEVEL-SHIFT VOLTAGE
Voltage
(VAVDD + VAVSS) / 2
V
Output impedance
100
Ω
SENSOR BIAS
Currents
±0.5, ±2, ±10, ±50, ±200
µA
Pull-up/pull-down resistor
10
M
Ω
TEST DAC (TDAC)
DAC reference voltage
VAVDD – VAVSS
V
Differential output voltage
18 binary weighted settings
–4
4
V
Absolute output voltage
To VAVSS
0.5
4.5
V
Accuracy
±0.1%
±1.5%
Output impedance
See Table 12
(5)
Specified with VAVSS ≤ VREFN and VREFP ≤ VAVDD. For reference input voltage exceeding VAVDD or VAVSS, the ADC1 reference input
current = 10 nA/ mV.
Copyright © 2015, Texas Instruments Incorporated
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