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ADS1291IPBSR Datasheet(PDF) 5 Page - Texas Instruments

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No. de pieza ADS1291IPBSR
Descripción Electrónicos  Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

ADS1291IPBSR Datasheet(HTML) 5 Page - Texas Instruments

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ADS1291
ADS1292
ADS1292R
www.ti.com
SBAS502B – DECEMBER 2011 – REVISED SEPTEMBER 2012
ELECTRICAL CHARACTERISTICS (continued)
Minimum and maximum specifications apply from –40°C to +85°C. Typical specifications are at +25°C. All specifications are
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.
ADS1291, ADS1292, ADS1292R
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INTERNAL REFERENCE
Register bit CONFIG2.VREF_4V = 0
2.42
V
Output voltage
Register bit CONFIG2.VREF_4V = 1
4.033
V
Output current drive
Available for external use
100
µA
VREF accuracy
±0.5
%
Internal reference drift
–40°C
≤ TA ≤ +85°C
45
ppm/°C
Settled to 0.2% with 10-µF capacitor on
Start-up time
100
ms
VREFP pin
Quiescent current consumption
20
µA
SYSTEM MONITORS
Analog supply reading error
1
%
Digital supply reading error
1
%
From power-supply ramp after power-on
32
ms
reset (POR) to DRDY low
Device wake up
From power-down mode to DRDY low
10
ms
From STANDBY mode to DRDY low
10
ms
VCAP1 settling time
1% accuracy
0.5
s
Voltage
TA = +25°C
145
mV
Temperature sensor
reading
Coefficient
490
μV/°C
TEST SIGNAL
Signal frequency
See Register Map section for settings
At dc and 1 Hz
Hz
Signal voltage
See Register Map section for settings
±1
mV
Accuracy
±2
%
CLOCK
Internal oscillator clock frequency
Nominal frequency
512
kHz
TA = +25°C
±0.5
%
Internal clock accuracy
–40°C
≤ TA ≤ +85°C
±1.5
%
Internal oscillator start-up time
32
μs
Internal oscillator power consumption
30
μW
CLKSEL pin = 0, CLK_DIV = 0
485
512
562.5
kHz
External clock input frequency
CLKSEL pin = 0, CLK_DIV = 1
1.94
2.048
2.25
MHz
DIGITAL INPUT/OUTPUT
DVDD = 1.8 V to
VIH
0.8 DVDD
DVDD + 0.1
V
3.6 V
DVDD = 1.8 V to
VIL
–0.1
0.2 DVDD
V
3.6 V
DVDD = 1.7 V to
VIH
DVDD – 0.2
V
1.8 V
Logic level
DVDD = 1.7 V to
VIL
0.2
V
1.8 V
DVDD = 1.7 V to
VOH
IOH = –500 μA
0.9 DVDD
V
3.6 V
DVDD = 1.7 V to
VOL
IOL = +500 μA
0.1 DVDD
V
3.6 V
IIN
Input current
0 V < VDigitalInput < DVDD
–10
+10
μA
POWER-SUPPLY REQUIREMENTS
AVDD
Analog supply
AVDD – AVSS
2.7
3
5.25
V
DVDD
Digital supply
DVDD – DGND
1.7
1.8
3.6
V
AVDD – DVDD
–2.1
3.6
V
Copyright © 2011–2012, Texas Instruments Incorporated
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