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ADS1271 Datasheet(PDF) 3 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # ADS1271
Description  24 BIT WIDE BANDWIDTH ANALOG TO DIGITAL CONVERTER
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

ADS1271 Datasheet(HTML) 3 Page - Burr-Brown (TI)

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ADS1271
SBAS306A − NOVEMBER 2004 − REVISED DECEMBER 2004
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at TA = −40°C to +105°C, AVDD = +5V, DVDD = +1.8V, fCLK = 27MHz, and VREF = +2.5V, unless otherwise noted.
ADS1271
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Analog Inputs
Full-scale input voltage (FSR)(1)
VIN = (AINP – AINN)
±VREF
V
Absolute input voltage
AINP or AINN to AGND
AGND – 0.1
AVDD + 0.1
V
Common-mode input voltage
VCM = (AINP + AINN)/2
2.5
V
Differential input
High-Speed mode
16.4
k
Differential input
impedance
High-Resolution mode
16.4
k
impedance
Low-Power mode
32.8
k
DC Performance
Resolution
No missing codes
24
Bits
High-Speed mode
105,469
SPS
Data rate (fDATA)
High-Resolution mode
52,734
SPS
Data rate (fDATA)
Low-Power mode
52,734
SPS
Integral nonlinearity (INL)
Differential input, VCM = 2.5V
± 0.0006
± 0.0015 % of FSR(1)
Offset error
High-Speed mode
Without calibration
0.150
1
mV
Offset error
With calibration
On the level of the noise
Offset drift
1.8
µV/_C
Gain error
0.1
0.5
%
Gain error drift
2
ppm/
°C
High-Speed mode
Shorted input
9.0
20
µV, rms
Noise
High-Resolution mode
6.5
µV, rms
Noise
Low-Power mode
9.0
µV, rms
Common-mode rejection
fCM = 60Hz
90
100
dB
Power-supply
AVDD
f = 60Hz
80
dB
Power-supply
rejection
DVDD
f = 60Hz
80
dB
AC Performance
Signal-to-noise ratio
High-Speed mode
99
106
dB
Signal-to-noise ratio
(SNR) (2)
(unweighted)
High-Resolution mode
109
dB
(SNR) (2)
(unweighted)
Low-Power mode
106
dB
Total harmonic distortion (THD) (3)
VIN = 1kHz, −0.5dBFS
−105
−95
dB
Spurious free dynamic range
−108
dB
Passband ripple
±0.005
dB
Passband
0.453 fDATA
Hz
−3dB Bandwidth
0.49 fDATA
Hz
Stop band attenuation
100
dB
High-Speed mode
0.547 fDATA
63.453 fDATA
Hz
Stop band
High-Resolution mode
0.547 fDATA
127.453 fDATA
Hz
Stop band
Low-Power mode
0.547 fDATA
63.453 fDATA
Hz
Group delay
High-Speed and
Low-Power modes
38/fDATA
s
Group delay
High-Resolution mode
39/fDATA
s
Settling time (latency)
High-Speed and
Low-Power modes
Complete settling
76/fDATA
s
Settling time (latency)
High-Resolution mode
Complete settling
78/fDATA
s
(1) FSR = full-scale range = 2VREF.
(2) Minimum SNR is ensured by the limit of the DC noise specification.
(3) THD includes the first nine harmonics of the input signals.
(4) MODE and FORMAT pins excluded.
(5) See the text for more details on SCLK.


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