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ADS1191IPBSR bảng dữ liệu(PDF) 4 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  Low-Power, 2-Channel, 16-Bit Analog Front-End for Biopotential Measurements
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ADS1191
ADS1192
SBAS566
– DECEMBER 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Minimum and maximum specifications apply from
–40°C to +85°C. Typical specifications are at +25°C. All specifications at
DVDD = 1.8 V, AVDD
– AVSS = 3 V
(1), V
REF = 2.42 V, external fCLK = 512 kHz, data rate = 500 SPS, CFILTER = 4.7 nF
(2), and
gain = 6, unless otherwise noted.
ADS1191, ADS1192
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
RIGHT LEG DRIVE (RLD) AMPLIFIER
Integrated noise
BW = 150 Hz
1.4
μVRMS
GBP
Gain bandwidth product
50 k
Ω || 10 pF load, gain = 1
100
kHz
SR
Slew rate
50 k
Ω || 10 pF load, gain = 1
0.07
V/
μs
THD
Total harmonic distortion
fIN = 100 Hz, gain = 1
–85
dB
CMIR
Common-mode input range
AVSS + 0.3
AVDD
– 0.3
V
Common-mode resistor matching
Internal 200-k
Ω resistor matching
0.1
%
ISC
Short-circuit current
1.1
mA
Quiescent power consumption
RLD amplifier
5
μA
LEAD-OFF DETECT
Frequency
See Register Map section for settings
0, fDR/4
kHz
ILEAD_OFF [1:0] = 00
6
nA
ILEAD_OFF [1:0] = 01
22
nA
Current
ILEAD_OFF [1:0] = 10
6
μA
ILEAD_OFF [1:0] = 11
22
μA
Current accuracy
±20
%
Comparator threshold accuracy
±30
mV
EXTERNAL REFERENCE
AVDD = 3 V, VREF = (VREFP – VREFN)
2
2.5
VDD
– 0.3
V
Reference input voltage
AVDD = 5 V, VREF = (VREFP – VREFN)
2
4
VDD
– 0.3
V
VREFN
Negative input
AVSS
V
VREFP
Positive input
AVSS + 2.5
V
Input impedance
120
k
INTERNAL REFERENCE
CONFIG2.VREF_4V = 0
2.42
V
Output voltage
CONFIG2.VREF_4V = 1
4.033
V
Output current drive
Available for external use
100
µA
VREF accuracy
±0.5
%
Internal reference drift
45
ppm/
°C
Settled to 0.2% with 10-
µF capacitor on
Start-up time
100
ms
VREFP pin
Quiescent current consumption
20
µA
4
Submit Documentation Feedback
Copyright
© 2011, Texas Instruments Incorporated
Product Folder Link(s): ADS1191 ADS1192


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