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ADS114S0XB bảng dữ liệu(PDF) 6 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  Low-Power, Low-Noise, Highly Integrated, 6- and 12-Channel, 4-kSPS, 16-Bit, Delta-Sigma ADC With PGA and Voltage Reference
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ADS114S06B, ADS114S08B
SBAS852 – AUGUST 2017
www.ti.com
Product Folder Links: ADS114S06B ADS114S08B
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
(1)
AINP and AINN denote the positive and negative inputs of the PGA. Any of the available analog inputs (AINx) can be selected as either
AINP or AINN by the input multiplexer.
(2)
VINMAX denotes the maximum differential input voltage, VIN, that is expected in the application. |VINMAX| can be smaller than VREF / Gain.
(3)
REFPx and REFNx denote one of the two available external differential reference input pairs.
(4)
An external clock is not required when the internal oscillator is used.
7.3 Recommended Operating Conditions
over operating ambient temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
POWER SUPPLY
Analog power supply
AVDD to AVSS
2.7
5.25
V
AVSS to DGND
–2.625
0
0.05
AVDD to DGND
1.5
5.25
Digital core power supply
DVDD to DGND
2.7
3.6
V
Digital IO power supply
IOVDD to DGND
DVDD
5.25
V
ANALOG INPUTS(1)
V(AINx)
Absolute input voltage(2)
PGA bypassed
AVSS – 0.05
AVDD + 0.05
V
PGA enabled, gain = 1 to 16
AVSS + 0.15 +
|VINMAX|·(Gain – 1) / 2
AVDD – 0.15 –
|VINMAX|·(Gain –1) / 2
PGA enabled, gain = 32 to 128
AVSS + 0.15 +
15.5·|VINMAX|
AVDD – 0.15 –
15.5·|VINMAX|
VIN
Differential input voltage
VIN = VAINP – VAINN
–VREF / Gain
VREF / Gain
V
VOLTAGE REFERENCE INPUTS(3)
VREF
Differential reference input
voltage
VREF = V(REFPx) – V(REFNx)
0.5
AVDD – AVSS
V
V(REFNx)
Absolute negative reference
voltage
Negative reference buffer disabled
AVSS – 0.05
V(REFPx) – 0.5
V
Negative reference buffer enabled
AVSS
V(REFPx) – 0.5
V
V(REFPx)
Absolute positive reference
voltage
Positive reference buffer disabled
V(REFNx) + 0.5
AVDD + 0.05
V
Positive reference buffer enabled
V(REFNx) + 0.5
AVDD
V
EXTERNAL CLOCK SOURCE(4)
fCLK
External clock frequency
2
4.096
4.5
MHz
Duty cycle
40%
50%
60%
GENERAL-PURPOSE INPUTS (GPIOs)
Input voltage
AVSS – 0.05
AVDD + 0.05
V
DIGITAL INPUTS (Other than GPIOs)
Input voltage
DGND
IOVDD
V
TEMPERATURE RANGE
TA
Operating ambient temperature
–40
125
°C
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
7.4 Thermal Information
THERMAL METRIC(1)
ADS114S06B, ADS114S08B
UNIT
VQFN (RHB)
TQFP (PBS)
32 PINS
32 PINS
RθJA
Junction-to-ambient thermal resistance
45.2
75.5
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
28.3
17.1
°C/W
RθJB
Junction-to-board thermal resistance
15.8
28.5
°C/W
ψJT
Junction-to-top characterization parameter
0.4
0.4
°C/W
ψJB
Junction-to-board characterization parameter
15.7
28.3
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
2.3
n/a
°C/W


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