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ADS1293CISQX Arkusz danych(PDF) 7 Page - Texas Instruments

Numer części ADS1293CISQX
Szczegółowy opis  ADS1293 Low Power, 3-Channel, 24-Bit Analog Front End for Biopotential Measurements
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ADS1293
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SNAS602B – FEBRUARY 2013 – REVISED MARCH 2013
ELECTRICAL CHARACTERISTICS
(1) (continued)
Unless otherwise noted, all limits are specified at TA = +25°C, +2.7V ≤ VDD ≤ +5.5V, +1.65V ≤ VDDIO ≤ MIN(+3.6V, VDD),
VREF = +2.4V, fOSC = 409.6kHz, 1µF low ESR capacitor between CVREF and GND, 0.1µF capacitor between RLDREF and
GND. Boldface limits apply for TMIN ≤ TA ≤ TMAX.
PARAMETER
TEST CONDITIONS
MIN(2)
TYP(3)
MAX(2)
UNIT
RIGHT LEG DRIVE AMPLIFIER (RLD Amp)
VOS
Input-Referred Offset Voltage
±5
mV
CMVR
Common-Mode Voltage Range
0.5
VDD – 0.5
V
Low bandwidth mode
50
kHz
GBW
Programmable Gain Bandwidth
High bandwidth mode
200
kHz
Low bandwidth mode
25
mV/
μs
SR
Slew Rate
High bandwidth mode
90
mV/
μs
High bandwidth, Low cap-drive mode (see Table 11)
400
pF
Programmable Capacitive Load Driving
ClMAX
Capability
Low bandwidth, High cap-drive mode (see Table 11)
8
nF
Low bandwidth, Low cap-drive mode
20
36
μA
IVDD
Quiescent Power Consumption
High bandwidth, High cap-drive mode
60
91
μA
RIGHT LEG DRIVE REFERENCE
(VDD –
RLDREF
Output Voltage
Unloaded
V
VSS)/2.2
COMMON-MODE DETECTOR AMPLIFIER (CMDET Amp)
CMVR
Common-Mode Voltage Range
0.5
VDD – 0.5
V
Low bandwidth mode
50
kHz
BW
Programmable Bandwidth
High bandwidth mode
150
kHz
Low bandwidth mode
25
mV/
μs
SR
Slew Rate
High bandwidth mode
90
mV/
μs
High bandwidth mode, Low capdrive mode (see
400
pF
Table 10)
Programmable Capacitive Load Driving
ClMAX
Capability
Low bandwidth mode, High cap- drive mode (see
8
nF
Table 10)
N leads, low bandwidth mode, low cap-drive mode
21 + 3 × N
μA
IVDD
Power Consumption (Selected Leads)
N leads, high bandwidth mode, high cap-drive mode
61 + 3 × N
μA
WILSON REFERENCE CIRCUIT
IVR
Input Voltage Range
0.5
VDD – 0.5
V
BW
Bandwidth
3 buffers ON
50
kHz
SR
Slew Rate
3 buffers ON
45
mV/
μs
Ne
Noise Density
At 10Hz
60
nV/
√Hz
Input-Referred Noise for Wilson
Ve
0.1 - 200Hz, 3 buffers ON
5.5
μVPP
Reference Amp
IVDD
Power Consumption (Selected Leads)
N leads, low power mode
7 × N
μA
LEAD OFF DETECTION
Programmable: Min. code 0x01
8
nA
(See Lead-Off Detection (LOD))
IEXC
Excitation Current
Programmable: Max. code 0xFF
2040
nA
(See Lead-Off Detection (LOD))
IEXCTOL
Excitation Current Accuracy
25%
AC LOD mode, programmable, minimum
6.1
Hz
(see Analog AC Lead-Off Detect )
FEXC
Excitation Frequency
AC LOD mode, programmable, maximum
12.5
kHz
(see Analog AC Lead-Off Detect)
VTHDC
DC Lead Off Comparator Threshold
VDD – 0.5
V
VHYST
Comparator Hysteresis
DC lead off mode
55
mV
IVDD
Current Consumption
Programmed excl. excitation current
25
μA
Copyright © 2013, Texas Instruments Incorporated
7
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