Datasheet

ADS7947
ADS7948
ADS7949
SLAS708 –SEPTEMBER 2010 www.ti.com
ELECTRICAL CHARACTERISTICS: ADS7948 (10-Bit) (continued)
Minimum/maximum specifications at AVDD = 2.7V to 5.5V, DVDD = 1.65V to AVDD, T
A
= –40°C to +125°C, and
f
SAMPLE
= 2MSPS, unless otherwise noted. Typical specifications at AVDD = 3V, DVDD = 1.8V, T
A
= +25°C, and f
SAMPLE
=
2MSPS.
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
POWER-SUPPLY REQUIREMENTS
AVDD 2.7 3.3 5.5 V
DVDD 1.65 3.3 AVDD V
AVDD = 3.3V, f
SAMPLE
= 2MSPS 2.5 mA
I
DYNAMIC
AVDD = 5V, f
SAMPLE
= 2MSPS 3 3.5 mA
AVDD supply current
AVDD = 3.3V, SCLK off 1.8 mA
I
STATIC
AVDD = 5V, SCLK off 1.9 2.5 mA
DVDD = 3.3V, SCLK = 34MHz, 500 µA
DVDD supply current
(6)
SDO load 20pF
I
PD-DYNAMIC
SCLK = 34MHz 550 µA
Power-down state
AVDD supply current
I
PD-STATIC
SCLK off 2.5 µA
Power-up time 1 µs
TEMPERATURE RANGE
Specified performance –40 +125 °C
(6) DVDD consumes only dynamic current. I
DVDD
= C
LOAD
× DVDD × number of 0→1 transitions in SDO × f
SAMPLE
. This is a
load-dependent current and there is no DVDD current when the output is not toggling.
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