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SBAS306A − NOVEMBER 2004 − REVISED DECEMBER 2004
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T = −40°C to +105°C, AVDD = +5V, DVDD = +1.8V, f
= 27MHz, and V = +2.5V, unless otherwise noted.
REF
A
CLK
ADS1271
TYP
PARAMETER
Voltage Reference Inputs
Reference input Voltage (V
TEST CONDITIONS
MIN
MAX
UNITS
)
V
= VREFP – VREFN
0.5
AGND − 0.1
VREFN + 0.5
2.5
2.65
VREFP − 0.5
AVDD + 0.1
V
V
REF
REF
Negative reference input (VREFN)
Positive reference input (VREFP)
V
High-Speed mode
4.2
4.2
8.4
kΩ
kΩ
kΩ
Reference Input
impedance
High-Resolution mode
Low-Power mode
Digital Input/Output
V
V
V
V
0.7 DVDD
DGND
DVDD
0.3 DVDD
DVDD
0.2 DVDD
10
V
V
IH
IL
I
I
= 5mA
0.8 DVDD
DGND
V
OH
OH
= 5mA
V
OL
OL
(4)
Input leakage
0 < V
IN DIGITAL
< DVDD
µA
Master clock rate (f
)
1
27
MHz
MHz
MHz
MHz
MHz
CLK
SPI format
24 f
64 f
f
CLK
DATA
DATA
DATA
DATA
High-Speed mode
High-Resolution mode
Low-Power mode
64 f
128 f
64 f
Serial clock rate
DATA
DATA
DATA
(5)
(f )
SCLK
128 f
64 f
Frame-Sync format
Power Supply
AVDD
4.75
1.65
5
5.25
3.6
25
25
9.5
70
10
6
V
DVDD
V
High-Speed mode
High-Resolution mode
Low-Power mode
17
17
6.3
1
mA
mA
mA
µA
AVDD current
T ≤ 105°C
T ≤ 85°C
Power-Down mode
1
µA
High-Speed mode
High-Resolution mode
Low-Power mode
3.5
2.5
1.8
1
mA
mA
mA
µA
5
3.5
70
20
136
134
54
DVDD current
T ≤ 105°C, DVDD = 3.3V
T ≤ 85°C, DVDD = 3.3V
Power-Down mode
1
µA
High-Speed mode
High-Resolution mode
Low-Power mode
92
90
35
mW
mW
mW
Power dissipation
Temperature Range
Specified
−40
−40
−60
+105
+105
+150
_C
_C
_C
Operating
Storage
(1)
(2)
(3)
(4)
(5)
FSR = full-scale range = 2V
.
REF
Minimum SNR is ensured by the limit of the DC noise specification.
THD includes the first nine harmonics of the input signals.
MODE and FORMAT pins excluded.
See the text for more details on SCLK.
4
BB [ BURR-BROWN CORPORATION ]
