EVAL-AD7675CBZ Analog Devices Inc, EVAL-AD7675CBZ Datasheet - Page 7

• Manufacturer Part Number: EVAL-AD7675CBZ
• Description: BOARD EVALUATION FOR AD7675
• Manufacturer: Analog Devices Inc
• Series: PulSAR®r

Specifications of EVAL-AD7675CBZ

• Number Of Adc's: 1
• Number Of Bits: 16
• Sampling Rate (per Second): 100k
• Data Interface: Serial, Parallel
• Inputs Per Adc: 1 Differential
• Input Range: ±VREF
• Power (typ) @ Conditions: 17mW @ 100kSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD7675
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DEFINITION OF SPECIFICATIONS
INTEGRAL NONLINEARITY ERROR (INL)
Integral Nonlinearity is the maximum deviation of a straight line
drawn through the transfer function of the actual ADC. The
deviation is measured from the middle of each code.
DIFFERENTIAL NONLINEARITY ERROR (DNL)
In an ideal ADC, code transitions are 1 LSB apart. Differential
nonlinearity is the maximum deviation from this ideal value. It
is often specified in terms of resolution for which no missing
codes are guaranteed.
+FULL-SCALE ERROR
The last transition (from 011 . . . 10 to 011 . . . 11 in two’s
complement coding) should occur for an analog voltage 1 1/2 LSB
below the nominal +full scale (+2.499886 V for the
The +full-scale error is the deviation of the actual level of the
last transition from the ideal level.
–FULL-SCALE ERROR
The first transition (from 100 . . . 00 to 100 . . . 01 in two’s
complement coding) should occur for an analog voltage 1/2 LSB
above the nominal –full scale (–2.499962 V for the
The –full-scale error is the deviation of the actual level of the
last transition from the ideal level.
BIPOLAR ZERO ERROR
The bipolar zero error is the difference between the ideal midscale
input voltage (0 V) and the actual voltage producing the midscale
output code.
SPURIOUS FREE DYNAMIC RANGE (SFDR)
The difference, in decibels (dB), between the rms amplitude of
the input signal and the peak spurious signal.
REV. A
NC = NO CONNECT
D2/DIVSCLK[0]
D3/DIVSCLK[1]
BYTESWAP
SER/PAR
OB/2C
AGND
AVDD
NC
NC
NC
D0
D1
±
±
2.5 V range).
2.5 V range).
10
11
12
1
2
3
4
5
6
7
8
9
PIN CONFIGURATION
48 47 46 45 44
13 14 15 16 17 18 19 20 21 22 23 24
PIN 1
IDENTIFIER
48-Lead LQFP
(ST-48)
(Not to Scale)
–7–
AD7675
TOP VIEW
43 42 41 40
EFFECTIVE NUMBER OF BITS (ENOB)
ENOB is a measurement of the resolution with a sine wave
input. It is related to S/(N+D) by the following formula:
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 decibels.
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 decibels.
SIGNAL-TO-(NOISE + DISTORTION) RATIO (S/[N+D])
S/(N+D) 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 S/(N+D) is expressed in decibels.
APERTURE DELAY
Aperture delay is a measure of the acquisition performance and
is measured from the falling edge of the CNVST input to when
the input signal is held for a conversion.
TRANSIENT RESPONSE
The time required for the AD7675 to achieve its rated accuracy
after a full-scale step function is applied to its input.
39 38 37
ENOB
36
35
34
33
32
31
30
29
28
26
25
27
AGND
CNVST
PD
RESET
CS
RD
DGND
BUSY
D15
D14
D13
D12
=
(
S
/
[
N
+
D
]
dB
– .
1 76 6 02
)
/ .
AD7675