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SBAS314A − APRIL 2004 − REVISED SEPTEMBER 2004
ELECTRICAL CHARACTERISTICS
All specifications at T = −40°C to +85°C, VDD = +5V, f
= 2MHz, and V = +2.5V, unless otherwise noted.
REF
A
CLK
PARAMETER
Analog Input
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Full-scale input voltage
AINP − AINN
Buffer off; AINP, AINN with respect to GND
2V
REF
V
V
GND − 0.1
VDD + 0.1
VDD − 1.5
Absolute input voltage
Buffer on; AINP, AINN with respect to GND 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
0.0003
0.0006
50
0.0015
150
% of FSR
Integral nonlinearity (INL)
Offset error
Buffer on; Differential input signal, end point fit
% of FSR
Buffer off
µV
Buffer on
50
µV
Buffer off
0.2
µV/°C
Offset error drift
Offset error match
Gain error
Buffer on
0.2
µV/°C
Between channels
Buffer off
20
100
µV
0.004
0.008
0.00003
0.00006
0.0005
95
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
Buffer on; at DC
Buffer off; at DC, VDD = 2.7V to 5.5V
Buffer on; at DC, VDD = 2.7V to 5.5V
%
dB
Common-mode rejection
90
100
dB
90
dB
dB
Power-supply rejection
90
Noise
0.8
ppm of FSR, rms
TemperatureSensor
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)
VDD
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
VDD + 0.1
V
VREFP − 0.5
VDD − 1.5
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
.
> VDD/2.
REF
3
BB [ BURR-BROWN CORPORATION ]
