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參數資料
| 型號： | AD7904 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | 4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP |
| 中文描述： | 4通道，1 MSPS的，8-/10-/12-Bit ADC的16與序列鉛TSSOP封裝 |
| 文件頁數： | 12/24頁 |
| 文件大小： | 411K |
| 代理商： | AD7904 |
–12–
AD7904/AD7914/AD7924
–
Typical Performance Characteristics
REV. 0
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
DD
supply of
frequency f
S
:
PSRR dB
(
)
Pf
is equal to the power at frequency f in ADC output;
Pf
S
is
equal to the power at frequency f
S
coupled onto the ADC
AV
DD
supply. Here a 200 mV p-p sine wave is coupled onto
the AV
DD
supply.
Pf
Pfs
log(
/
)
=
10
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.
FREQUENCY – kHz
–10
0
100
200
300
400
500
S
–30
–50
–70
–90
–110
50
150
250
350
450
4096 POINT FFT
V
DD
= 5V
f
SAMPLE
= 1MSPS
f
IN
SINAD = 71.147
THD = –87.229
SFDR = –90.744
TPC 1. AD7924 Dynamic Performance at 1 MSPS
INPUT FREQUENCY – kHz
75
10
1000
S
70
65
60
55
100
f
SAMPLE
= 1MSPS
T
RANGE = 0 TO REF
IN
V
DD
= V
DRIVE
= 2.7V
V
DD
= V
DRIVE
= 3.6V
V
DD
= V
DRIVE
= 4.75V
V
DD
= V
DRIVE
= 5.25V
TPC 2. AD7924 SINAD vs. Analog Input Frequency for
Various Supply Voltages at 1 MSPS
SUPPLY RIPPLE FREQUENCY – kHz
0
0
1000
P
–40
–60
–80
–90
500
–20
–50
–70
900
800
700
600
400
300
200
100
V
= 5V,
200mV p-p SINE WAVE ON V
DD
REF
= 2.5V, 1 F CAPACITOR
T
A
= 25 C
–10
–30
TPC 3. AD7924 PSRR vs. Supply Ripple Frequency
INPUT FREQUENCY – kHz
–50
10
1000
T
–65
–75
–85
–90
–60
–70
–80
100
–55
V
DD
= V
DRIVE
= 5.25V
V
DD
= V
DRIVE
= 4.75V
V
DD
= V
DRIVE
= 3.6V
V
DD
= V
DRIVE
= 2.7V
f
SAMPLE
= 1MSPS
T
RANGE = 0 TO REF
IN
TPC 4. AD7924 THD vs. Analog Input Frequency for
Various Supply Voltages at 1 MSPS
INPUT FREQUENCY – kHz
–50
10
1000
T
–65
–75
–85
–90
–60
–70
–80
100
–55
f
SAMPLE
= 1MSPS
T
RANGE = 0 TO REF
IN
V
DD
= 5.25V
R
IN
= 10
R
IN
= 50
R
IN
= 100
R
IN
= 1000
TPC 5. AD7924 THD vs. Analog Input Frequency for
Various Source Impedances
相關PDF資料 |
PDF描述 |
|---|---|
| AD7904BRU | 4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP |
| AD7914 | 4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP |
| AD7914BRU | 4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP |
| AD7924 | 4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP |
| AD7924BRU | 4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP |
相關代理商/技術參數 |
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|---|---|
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| AD7904BRUZ | 制造商:Analog Devices 功能描述:IC 8BIT ADC SMD 7904 TSSOP16 |
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