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ADS1120IPWR bảng dữ liệu(PDF) 7 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  Low-Power, Low-Noise, 16-Bit ADC for Small-Signal Sensors
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ADS1120IPWR bảng dữ liệu(HTML) 7 Page - Texas Instruments

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ADS1120
www.ti.com
SBAS535B – AUGUST 2013 – REVISED JANUARY 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 AVDD = 3.3 V, AVSS = 0 V, DVDD = 3.3 V, PGA enabled, DR = 20 SPS, and external Vref = 2.5 V
(unless otherwise noted).
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
EXCITATION CURRENT SOURCES (IDACs)
Current settings
50, 100, 250, 500, 1000, 1500
µA
Compliance voltage
All current settings
AVDD – 0.9
V
Accuracy
All current settings, each IDAC
–6%
±1%
6%
Current match
Between IDACs
±0.3%
Temperature drift
Each IDAC
50
ppm/°C
Temperature drift matching
Between IDACs
10
ppm/°C
TEMPERATURE SENSOR
Conversion resolution
14
Bits
Temperature resolution
0.03125
°C
TA = 0°C to +75°C
±0.25
°C
Accuracy
TA = –40°C to +125°C
±0.5
°C
Accuracy vs analog supply voltage
0.0625
0.25
°C/V
LOW-SIDE POWER SWITCH
RON
On-resistance
3.5
Ω
Current through switch
30
mA
DIGITAL INPUTS/OUTPUTS
VIH
High-level input voltage
0.7 DVDD
DVDD
V
VIL
Low-level input voltage
DGND
0.3 DVDD
V
VOH
High-level output voltage
IOH = 3 mA
0.8 DVDD
V
VOL
Low-level output voltage
IOL = 3 mA
0.2 DVDD
V
IH
Input leakage, high
VIH = 5.5 V
–10
10
µA
IL
Input leakage, low
VIL = DGND
–10
10
µA
POWER SUPPLY
Power-down mode
0.1
3
µA
Duty-cycle mode, PGA disabled
65
µA
Duty-cycle mode, gain = 1 to 16
95
µA
Duty-cycle mode, gain = 32
115
µA
Duty-cycle mode, gain = 64, 128
135
µA
Normal mode, PGA disabled
240
µA
IAVDD
Analog supply current(3)
Normal mode, gain = 1 to 16
340
490
µA
Normal mode, gain = 32
425
µA
Normal mode, gain = 64, 128
510
µA
Turbo mode, PGA disabled
360
µA
Turbo mode, gain = 1 to 16
540
µA
Turbo mode, gain = 32
715
µA
Turbo mode, gain = 64, 128
890
µA
Power-down mode
0.3
5
µA
Duty-cycle mode
55
µA
IDVDD
Digital supply current(3)
Normal mode
75
110
µA
Turbo mode
95
µA
Duty-cycle mode, PGA disabled
0.4
mW
PD
Power dissipation(3)
Normal mode, gain = 1 to 16
1.4
mW
Turbo mode, gain = 1 to 16
2.1
mW
(3)
Internal voltage reference selected, internal oscillator enabled, IDACs turned off, and continuous conversion mode.
Analog supply current increases by 70 µA, typ (normal mode, turbo mode) when selecting an external reference.
Analog supply current increases by 190 µA (typ) when enabling the IDACs (excludes the actual IDAC current).
Copyright © 2013–2015, Texas Instruments Incorporated
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