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AD7226BQ Arkusz danych(PDF) 4 Page - Analog Devices

Numer części AD7226BQ
Szczegółowy opis  LC2MOS Quad 8-Bit D/A Converter
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7226BQ Arkusz danych(HTML) 4 Page - Analog Devices

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AD7226
REV. A
–4–
ABSOLUTE MAXIMUM RATINGS*
VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +17 V
VDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +17 V
VSS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –7 V, VDD
VSS to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –7 V, VDD
VDD to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +24 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, VDD
Digital Input Voltage to DGND . . . . . . . –0.3 V, VDD + 0.3 V
VREF to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, VDD
VOUT to AGND
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS, VDD
Power Dissipation (Any Package) to +75
°C . . . . . . . . 500 mW
Derates above 75
°C by . . . . . . . . . . . . . . . . . . . . . 2.0 mW/°C
Operating Temperature
Commercial (K Version) . . . . . . . . . . . . . . –40
°C to +85°C
Industrial (B Version) . . . . . . . . . . . . . . . . –40
°C to +85°C
Extended (T Version) . . . . . . . . . . . . . . . –55
°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65
°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . +300
°C
NOTES
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in
the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
1Outputs may be shorted to AGND provided that the power dissipation of the
package is not exceeded. Typically short circuit current to AGND is 60 mA.
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7226 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
PIN CONFIGURATIONS
DIP and SOIC
LCCC
PLCC
TERMINOLOGY
TOTAL UNADJUSTED ERROR
This is a comprehensive specification which includes full-scale
error, relative accuracy and zero code error. Maximum output
voltage is VREF – 1 LSB (ideal), where 1 LSB (ideal) is VREF/
256. The LSB size will vary over the VREF range. Hence the zero
code error will, relative to the LSB size, increase as VREF de-
creases. Accordingly, the total unadjusted error, which includes
the zero code error, will also vary in terms of LSB’s over the
VREF range. As a result, total unadjusted error is specified for a
fixed reference voltage of +10 V.
RELATIVE ACCURACY
Relative Accuracy or endpoint nonlinearity, is a measure of the
maximum deviation from a straight line passing through the
endpoints of the DAC transfer function. It is measured after al-
lowing for zero and full-scale error and is normally expressed in
LSB’s or as a percentage of full-scale reading.
DIFFERENTIAL NONLINEARITY
Differential Nonlinearity is the difference between the measured
change and the ideal 1 LSB change between any two adjacent
codes. A specified differential nonlinearity of
±1 LSB max over
the operating temperature range ensures monotonicity.
DIGITAL CROSSTALK
The glitch impulse transferred to the output of one converter
due to a change in the digital input code to another of the con-
verters. It is specified in nV secs and is measured at VREF = 0 V.
FULL SCALE ERROR
Full-Scale Error is defined as:
Measured Value – Zero Code Error – Ideal Value


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