ꢇ ꢍꢚ ꢛꢀ ꢀꢁ
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SBAS286A − JUNE 2003 − REVISED MARCH 2004
ELECTRICAL CHARACTERISTICS
All specifications at T = −40°C to +85°C, AVDD = +5V, DVDD = +5V, f
= 2MHz, and V
REF
= +2.5V, unless otherwise noted.
A
CLK
PARAMETER
Analog Input
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Full-scale input voltage
AINP − AINN
2V
REF
V
V
Buffer off; AINP, AINN with respect to GND
Buffer on; AINP, AINN with respect to GND
GND − 0.1
AVDD + 0.1
AVDD − 1.5
Absolute input voltage
GND + 0.05
V
Buffer off; f
Buffer on; f
Buffer off; f
= 2MHz
= 2MHz
= 2MHz
2.7
1.2
5.4
MΩ
GΩ
MΩ
CLK
CLK
CLK
Differential input impedance
Common-mode input impedance
System Performance
Resolution
No missing codes
24
Bits
(1)
SPS
Data rate
120 (f /2MHz)
CLK
(2)
Buffer off, Differential input signal, end point fit
Buffer on, Differential input signal, end point fit
Buffer off
0.0003
0.0006
20
0.0015
100
% of FSR
Integral nonlinearity (INL)
Offset error
% of FSR
µV
Buffer on
20
µV
Buffer off
0.2
µV/°C
Offset error drift
Offset error match
Gain error
Buffer on
0.2
µV/°C
Between channels
20
100
µV
Buffer off
0.004
0.008
0.00003
0.00006
0.0005
110
0.025
%
Buffer on
%
Buffer off
% of FSR/°C
Gain error drift
Buffer on
% of FSR/°C
Gain error match
Between channels
%
Buffer off, at DC
90
90
dB
Common-mode rejection
Buffer on, at DC
110
dB
Buffer off, at DC, 10% ∆ in AVDD
Buffer on, at DC, 10% ∆ in AVDD
Buffer off, at DC, DVDD = 2.7V to 5.5V
Buffer on, at DC, DVDD = 2.7V to 5.5V
95
dB
Analog power-supply rejection
Digital power-supply rejection
95
dB
85
dB
dB
85
Noise
0.8
ppm of FSR, rms
Temperature Sensor
Temperature sensor voltage
Temperature sensor coefficient
Voltage Reference Input
Reference input voltage
Negative reference input
Positive reference input
Negative reference input
Positive reference input
Voltage reference impedance
T
= 25°C
106
360
mV
A
µV/°C
(3)
AVDD
V
= VREFP − VREFN
0.5
2.5
V
V
REF
Buffer off
Buffer off
Buffer on
Buffer on
GND − 0.1
VREFN + 0.5
GND + 0.05
VREFN + 0.5
VREFP − 0.5
AVDD + 0.1
VREFP − 0.5
AVDD − 1.5
V
V
V
f
= 2MHz
500
kΩ
CLK
(1)
(2)
(3)
SPS = samples per second.
FSR = full-scale range = 4V
REF
It will not be possible to reach the digital output full-scale code when V
.
> AVDD/2.
REF
3
BB [ BURR-BROWN CORPORATION ]
