ADUC814BRU Analog Devices Inc, ADUC814BRU Datasheet - Page 12
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ADUC814BRU
Manufacturer Part Number
ADUC814BRU
Description
A/D Converter (A-D) IC
Manufacturer
Analog Devices Inc
Series
MicroConverter® ADuC8xxr
Datasheet
1.EVAL-ADUC814QSZ.pdf
(72 pages)
Specifications of ADUC814BRU
Peak Reflow Compatible (260 C)
No
No. Of Bits
12 Bit
Leaded Process Compatible
No
Mounting Type
Surface Mount
No. Of Inputs
6
Features
+3V Or +5V Operation
Package / Case
28-TSSOP
Rohs Status
RoHS non-compliant
Core Processor
8052
Core Size
8-Bit
Speed
16.78MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
POR, PSM, Temp Sensor, WDT
Number Of I /o
17
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
640 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
EVAL-ADUC814QSZ - KIT DEV FOR ADUC814 MICROCONVRTR
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADUC814BRUZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
ADuC814
TERMINOLOGY
ADC SPECIFICATIONS
Integral Nonlinearity
This is the maximum deviation of any code from a straight line
passing through the endpoints of the ADC transfer function.
The endpoints of the transfer function are zero scale, a
point1/2 LSB below the first code transition and full scale, a
point 1/2 LSB above the last code transition.
Differential Nonlinearity
This is the difference between the measured and the ideal 1 LSB
change between any two adjacent codes in the ADC.
Offset Error
This is the deviation of the first code transition (0000 … 000) to
(0000 … 001) from the ideal, i.e., +1/2 LSB.
Full-Scale Error
This is the deviation of the last code transition from the ideal
AIN voltage (full-scale error has been adjusted out).
Signal-to-(Noise + Distortion) Ratio
This is the measured ratio of signal-to-(noise + distortion) at
the output of the ADC. The signal is the rms amplitude of the
fundamental. Noise is the rms sum of all nonfundamental
signals up to half the sampling frequency (f
The ratio is dependent upon the number of quantization levels
in the digitization process; the more levels, the smaller the
quantization noise. The theoretical signal-to-(noise + distortion)
ratio for an ideal N-bit converter with a sine wave input is given
by
Thus, for a 12-bit converter, this is 74 dB.
Total Harmonic Distortion (THD)
Total harmonic distortion is the ratio of the rms sum of the
harmonics to the fundamental.
Peak Harmonic or Spurious Noise
Peak harmonic or spurious noise is defined as the ratio of the
rms value of the next largest component in the ADC output
spectrum (up to f
fundamental. Normally, the value of this specification is
determined by the largest harmonic in the spectrum, but for
ADCs where the harmonics are buried in the noise floor, it is
the noise peak.
Signal-to =- (Noise + Distortion) = (6.02N + 1.76)
S
/2 and including dc) to the rms value of the
S
/2), excluding dc.
Rev. A | Page 12 of 72
DAC SPECIFICATIONS
Relative Accuracy
Relative accuracy or endpoint linearity is a measure of the
maximum deviation from a straight line passing through the
endpoints of the DAC transfer function. It is measured after
adjusting for zero-scale error and full-scale error.
Voltage Output Settling Time
This is the amount of time it takes for the output to settle to a
specified level for a full-scale input change.
Digital-to-Analog Glitch Impulse
This is the amount of charge injected into the analog output
when the inputs change state. It is specified as the area of the
glitch in nV-sec.