AD7685ACPZRL Analog Devices Inc, AD7685ACPZRL Datasheet - Page 9
![IC,A/D CONVERTER,SINGLE,16-BIT,CMOS,LLCC,10PIN](/photos/6/60/66049/cp-10-9_sml.jpg)
AD7685ACPZRL
Manufacturer Part Number
AD7685ACPZRL
Description
IC,A/D CONVERTER,SINGLE,16-BIT,CMOS,LLCC,10PIN
Manufacturer
Analog Devices Inc
Series
PulSAR®r
Datasheet
1.AD7685BCPZRL7.pdf
(28 pages)
Specifications of AD7685ACPZRL
Design Resources
Parametric Measurement Unit and Supporting Components for PAD Appls Using AD5522 and AD7685 (CN0104) Integrated Device Power Supply for PAD with Output Voltage Range 0 V to 25 V (CN0130)
Number Of Bits
16
Sampling Rate (per Second)
250k
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
15mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-WFDFN, CSP Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD7685CBZ - BOARD EVAL FOR AD7685
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
TERMINOLOGY
Integral Nonlinearity Error (INL)
INL refers to the deviation of each individual code from a line
drawn from negative full scale through positive full scale. The
point used as negative full scale occurs ½ LSB before the first
code transition. Positive full scale is defined as a level 1½ LSB
beyond the last code transition. The deviation is measured from
the middle of each code to the true straight line (see Figure 26).
Differential Nonlinearity Error (DNL)
In an ideal ADC, code transitions are 1 LSB apart. DNL is the
maximum deviation from this ideal value. It is often specified in
terms of resolution for which no missing codes are guaranteed.
Offset Error
The first transition should occur at a level ½ LSB above analog
ground (38.1 μV for the 0 V to 5 V range). The offset error is
the deviation of the actual transition from that point.
Gain Error
The last transition (from 111 . . . 10 to 111 . . . 11) should
occur for an analog voltage 1½ LSB below the nominal full
scale (4.999886 V for the 0 V to 5 V range). The gain error is the
deviation of the actual level of the last transition from the ideal
level after the offset is adjusted out.
Spurious-Free Dynamic Range (SFDR)
The difference, in decibels (dB), between the rms amplitude of
the input signal and the peak spurious signal.
Rev. B | Page 9 of 28
Effective Number of Bits (ENOB)
ENOB is a measurement of the resolution with a sine wave
input. It is related to SINAD by
and is expressed in bits.
Total Harmonic Distortion (THD)
THD is the ratio of the rms sum of the first five harmonic
components to the rms value of a full-scale input signal and is
expressed in dB.
Signal-to-Noise Ratio (SNR)
SNR is the ratio of the rms value of the actual input signal to the
rms sum of all other spectral components below the Nyquist
frequency, excluding harmonics and dc. The value for SNR is
expressed in dB.
Signal-to-(Noise + Distortion), SINAD
SINAD is the ratio of the rms value of the actual input signal to
the rms sum of all other spectral components below the Nyquist
frequency, including harmonics but excluding dc. The value for
SINAD is expressed in dB.
Aperture Delay
Aperture delay is a measure of the acquisition performance and
is the time between the rising edge of the CNV input and when
the input signal is held for a conversion.
Transient Response
The time required for the ADC to accurately acquire its input
after a full-scale step function is applied.
ENOB = (SINAD
dB
− 1.76)/6.02
AD7685