AD7924BRUZ-REEL7 Analog Devices Inc, AD7924BRUZ-REEL7 Datasheet - Page 12

• Manufacturer Part Number: AD7924BRUZ-REEL7
• Description: IC,Data Acquisition System,4-CHANNEL,12-BIT,TSSOP,16PIN,PLASTIC
• Manufacturer: Analog Devices Inc

Specifications of AD7924BRUZ-REEL7

• Number Of Bits: 12
• Sampling Rate (per Second): 1M
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 13.5mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD79X4CBZ - BOARD EVALUATION FOR AD79X4CBZ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7904/AD7914/AD7924–Typical Performance Characteristics
PERFORMANCE CURVES
TPC 1 shows a typical FFT plot for the AD7924 at 1MSPS
sample rate and 50 kHz input frequency. TPC 2 shows the
signal-to-(noise + distortion) ratio performance versus input
frequency for various supply voltages while sampling at 1 MSPS
with an SCLK of 20 MHz.
TPC 3 shows the power supply rejection ratio versus supply
ripple frequency for the AD7924 when no decoupling is used.
The power supply rejection ratio is defined as the ratio of the
power in the ADC output at full-scale frequency f, to the power
of a 200 mV p-p sine wave applied to the ADC AV
frequency f
Pf is equal to the power at frequency f in ADC output; Pf
equal to the power at frequency f
AV
the AV
TPC 2. AD7924 SINAD vs. Analog Input Frequency for
Various Supply Voltages at 1 MSPS
DD
TPC 1. AD7924 Dynamic Performance at 1 MSPS
supply. Here a 200 mV p-p sine wave is coupled onto
DD
–110
–10
–30
–50
–70
–90
75
70
65
60
55
10
supply.
0
S
:
f
T
RANGE = 0 TO REF
SAMPLE
A
50
= 25 C
PSRR dB
= 1MSPS
100
150
(
INPUT FREQUENCY – kHz
IN
FREQUENCY – kHz
)
200
= 10
250
100
log(
S
coupled onto the ADC
300
Pf Pfs
V
V
DD
DD
V
V
DD
DD
/
350
= V
= V
4096 POINT FFT
V
f
f
SINAD = 71.147
THD = –87.229
SFDR = –90.744
SAMPLE
IN
= V
= V
DD
DRIVE
DRIVE
= 50kHz
DRIVE
DRIVE
)
= 5V
400
= 5.25V
= 4.75V
= 1MSPS
= 3.6V
= 2.7V
DD
450
supply of
1000
500
S
is
–12–
TPC 4 shows a graph of total harmonic distortion versus analog
input frequency for various supply voltages, while TPC 5 shows
a graph of total harmonic distortion versus analog input frequency
for various source impedances. See the Analog Input section.
TPC 6 and TPC 7 show typical INL and DNL plots for the
AD7924.
TPC 4. AD7924 THD vs. Analog Input Frequency for
Various Supply Voltages at 1 MSPS
TPC 5. AD7924 THD vs. Analog Input Frequency for
Various Source Impedances
TPC 3. AD7924 PSRR vs. Supply Ripple Frequency
–50
–55
–60
–65
–70
–75
–80
–85
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
–50
–55
–60
–65
–70
–75
–80
–85
–90
0
10
10
0
V
200mV p-p SINE WAVE ON V
REF
T
f
T
RANGE = 0 TO REF
V
f
T
RANGE = 0 TO REF
SAMPLE
A
SAMPLE
DD
A
DD
A
= 25 C
100
= 25 C
= 25 C
IN
= 5V,
= 5.25V
= 2.5V, 1 F CAPACITOR
= 1MSPS
= 1MSPS
200
SUPPLY RIPPLE FREQUENCY – kHz
300
INPUT FREQUENCY – kHz
INPUT FREQUENCY – kHz
IN
IN
R
IN
400
= 1000
DD
100
500
100
V
DD
600
V
= V
DD
V
R
IN
DD
DRIVE
= V
= 100
V
= V
700
DD
DRIVE
DRIVE
= 2.7V
= V
R
800
IN
DRIVE
= 5.25V
= 4.75V
= 10
R
IN
900
= 3.6V
= 50
1000
1000
1000
REV. 0