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AD7656ABSTZ Datasheet(PDF) 6 Page - Analog Devices

Part # AD7656ABSTZ
Description  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7656ABSTZ Datasheet(HTML) 6 Page - Analog Devices

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AD7656A
Data Sheet
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter
Rating
VDD to AGND, DGND
0 V to +16.5 V
VSS to AGND, DGND
0 V to −16.5 V
VDD to AVCC
AVCC + 0.7 V to 16.5 V
AVCC to AGND, DGND
−0.3 V to +7 V
DVCC to AVCC
−0.3 V to AVCC + 0.3 V
DVCC to DGND, AGND
−0.3 V to +7 V
AGND to DGND
−0.3 V to +0.3 V
VDRIVE to DGND
−0.3 V to DVCC + 0.3 V
Analog Input Voltage to AGND
VSS + 1 V to VDD − 1 V
Digital Input Voltage to DGND
−0.3 V to VDRIVE + 0.3 V
Digital Output Voltage to DGND
−0.3 V to VDRIVE + 0.3 V
REFIN/REFOUT to AGND
−0.3 V to AVCC + 0.3 V
Input Current to Any Pin Except Supplies1
±10 mA
Operating Temperature Range
−40°C to +85°C
Storage Temperature Range
−65°C to +150°C
Junction Temperature
150°C
Pb/Sn Temperature, Soldering
Reflow (10 sec to 30 sec)
240(0)°C
Pb-Free Temperature, Soldering Reflow
260(0)°C
1
Transient currents of up to 100 mA do not cause SCR latch-up.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
POWER SUPPLY SEQUENCING
Simultaneous application of VDD and VSS is necessary to
guarantee reliability of the device. In the cases where
simultaneous application cannot be guaranteed, VDD must power
up before VSS. When a negative voltage is applied to the analog
inputs before VDD and VSS are fully powered up, a 560 Ω resistor
must be placed on the analog inputs.
A number of sequencing combinations can lead to temporary
high current states; however, when all supplies are powered up,
the device returns to normal operating currents. The analog
input (AIN) coming before AVCC causes temporary high current
on the analog inputs. Digital inputs before DVCC, and DVCC
before other supplies, also cause temporary high current states.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages. These
specifications apply to a 4-layer board.
Table 4. Thermal Resistance
Package Type
θJA
θJC
Unit
64-Lead LQFP
45
11
°C/W
ESD CAUTION
Rev. 0 | Page 6 of 28


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