AD7798BRU Просмотр технического описания (PDF) - Analog Devices
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AD7798BRU Datasheet PDF : 28 Pages
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Preliminary Technical Information
AD7798/AD7799
Parameter
SYSTEM CALIBRATION2
Full-Scale Calibration Limit
Zero-Scale Calibration Limit
Input Span
POWER REQUIREMENTS7
Power Supply Voltage
AVDD – GND
DVDD – GND
Power Supply Currents
IDD Current
IDD (Power-Down Mode)
AD7798B/AD7799B1 Unit
1.05 × FS
−1.05 × FS
0.8 × FS
2.1 × FS
V max
V min
V min
V max
2.7/5.25
2.7/5.25
140
185
400
500
1
V min/max
V min/max
µA max
µA max
µA max
µA max
µA max
Test Conditions/Comments
110 µA typ @ AVDD = 3 V, 125 µA typ @ AVDD =
5 V, Unbuffered Mode
130 µA typ @ AVDD = 3 V, 165 µA typ @ AVDD =
5 V, Buffered Mode, Gain = 1 or 2
300 µA typ @ AVDD = 3 V, 350 µA typ @ AVDD =
5 V, Gain = 4 to 128, AD7798
400 µA typ @ AVDD = 3 V, 450 µA typ @ AVDD =
5 V, Gain = 4 to 128, AD7799
1Temperature Range –40°C to +105°C.
2Specification is not production tested but is supported by characterization data at initial product release.
3Following a calibration, this error will be in the order of the noise for the programmed gain and update rate selected.
4Recalibration at any temperature will remove these errors.
5Full-scale error applies to both positive and negative full-scale and applies at the factory calibration conditions (AVDD = 4 V, Gain = 1, TA = 25°C).
6FS[3:0] are the four bits used in the mode register to select the output word rate.
7Digital inputs equal to DVDD or GND with excitation currents and bias voltage generator disabled.
Pr.E 10/04 | Page 5 of 28
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