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AD6640 датащи(PDF) 4 Page - Analog Devices

номер детали AD6640
подробное описание детали  12-Bit, 65 MSPS IF Sampling A/D Converter
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD6640 датащи(HTML) 4 Page - Analog Devices

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Test
AD6640AST
Parameter (Conditions)
Temp
Level
Min
Typ
Max
Unit
Maximum Conversion Rate
Full
VI
65
MSPS
Minimum Conversion Rate
2
Full
IV
6.5
MSPS
Aperture Delay (tA)
+25
°CV
400
ps
Aperture Uncertainty (Jitter)
+25
°CV
0.3
ps rms
ENCODE Pulsewidth High
3
+25
°CIV
6.5
ns
ENCODE Pulsewidth Low
+25
°CIV
6.5
ns
Output Delay (tOD) DVCC + 3.3 V/5.0 V
4
Full
IV
8.5
10.5
12.5
ns
NOTES
1All switching specifications tested by driving ENCODE and
ENCODE differentially.
2A plot of Performance versus ENCODE is shown in TPC 10.
3A plot of Performance versus Duty Cycle (ENCODE = 65 MSPS) is shown in TPC 11.
4Outputs driving one LCX gate. Delay is measured from differential crossing of ENCODE and
ENCODE to the time when all output data bits are within valid logic levels.
Specifications subject to change without notice.
Test
AD6640AST
Parameter (Conditions)
Temp
Level
Min
Typ
Max
Unit
SNR
Analog Input
2.2 MHz
+25
°CV
68
dB
@ –1 dBFS
15.5 MHz
+25
°CI
64
67.7
dB
31.0 MHz
+25
°CV
67.5
dB
69.0 MHz
+25
°CV
66
dB
SINAD
Analog Input
2.2 MHz
+25
°CV
68
dB
@ –1 dBFS
15.5 MHz
+25
°CI
63.5
67.2
dB
31.0 MHz
+25
°CV
67.0
dB
69.0 MHz
+25
°CV
65.5
dB
Worst Harmonic
2 (2nd or 3rd)
Analog Input
2.2 MHz
+25
°CV
80
dBc
@ –1 dBFS
15.5 MHz
+25
°CI
74
80
dBc
31.0 MHz
+25
°CV
79.5
dBc
69.0 MHz
+25
°CV
78.5
dBc
Worst Harmonic
2 (4th or Higher)
Analog Input
2.2 MHz
+25
°CV
85
dBc
@ –1 dBFS
15.5 MHz
+25
°CI
74
85
dBc
31.0 MHz
+25
°CV
85
dBc
69.0 MHz
+25
°CV
84
dBc
Multitone SFDR (with Dither)
3
Eight Tones @ –20 dBFS
Full
V
90
dBFS
Two-Tone IMD Rejection
4
F1, F2 @ –7 dBFS
Full
V
80
dBc
Analog Input Bandwidth
5
+25
°CV
300
MHz
NOTES
1All ac specifications tested by driving ENCODE and
ENCODE differentially.
2For a single test tone at –1 dBFS, the worst-case spectral performance is typically limited by the direct or aliased second or third harmonic. If a system is designed
such that the second and third harmonics fall out-of-band, overall performance in the band of interest is typically improved by 5 dB. Worst harmonic (fourth or higher)
includes fourth and higher order harmonics and all other spurious components. Reference TPC 6 for more detail.
3See Overcoming Static Nonlinearities with Dither section for details on improving SFDR performance. To measure SFDR, eight tones from 14 MHz to 18 MHz
(0.5 MHz spacing) are swept from –20 dBFS to –90 dBFS. An open channel at 16 MHz is used to monitor SFDR.
4F1 = 14.9 MHz, F2 = 16 MHz.
5Specification is small signal bandwidth. Plots of Performance versus Analog Input Frequency are shown in TPCs 4, 5, and 6. Sampling wide bandwidths (5 MHz–15 MHz)
should be limited to 70 MHz center frequency.
Specifications subject to change without notice.
REV. A
–3–
(AVCC = 5 V, DVCC = 3.3 V; ENCODE and ENCODE = 65 MSPS; TMIN = –40 C, TMAX = +85 C,
unless otherwise noted.)
(AVCC = +5 V, DVCC = +3.3 V; ENCODE and ENCODE = 65 MSPS; TMIN = –40 C, TMAX = +85 C,
unless otherwise noted.)
SWITCHING SPECIFICATIONS1
AC SPECIFICATIONS1
AD6640


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