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參數(shù)資料
| 型號： | LTC1402C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Serial 12-Bit, 2.2Msps Sampling ADC with Shutdown |
| 中文描述： | 串行12位，2.2Msps采樣ADC，帶有關(guān)斷 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 251K |
| 代理商： | LTC1402C |
5
LTC1402
Note 12:
The absolute voltage at A
IN+
and A
IN–
must be within this range.
Note 13:
If less than 7.3ns is allowed, the output data will appear one
clock cycle later. It is best for CONV to rise half a clock before SCK, when
running the clock at rated speed.
Note 14:
Not the same as aperture delay. Aperture delay is smaller (2.6ns)
because the 0.8ns delay through the sample-and-hold is subtracted from
the CONV to Hold mode delay.
Note 15:
The rising edge of SCK is guaranteed to catch the data coming
out into a storage latch.
Note 16:
The Sample mode is started by the 14th rising clock and it is
ended by the rising edge of convert. Because the start of Sample mode is
ELECTRICAL CHARACTERISTICS
slower than the end of Sample mode, the sample time is 6ns less than the
delay between the 14th SCK and CONV.
Note 17:
The internal reference settles in 2ms after it wakes up from Sleep
mode with one or more cycles at SCK and a 10
μ
F capacitive load. The
Sleep mode resets the REFREADY bit in the D
OUT
sequence. The
REFREADY bit goes high again 10ms after the V
REF
has stopped slewing in
wake up. This ensures valid REFREADY bit operation even with higher load
capacitances at V
REF
.
Note 18:
The full power bandwidth is the frequency where the output code
swing drops to 2828LSBs with a 4V
P-P
input sine wave.
TYPICAL PERFOR U
Unipolar Mode Plots Run with a Single 5V Supply. V
DD
= 5V, V
SS
= –5V for Bipolar, V
DD
= 5V, V
SS
= 0V for Unipolar), T
A
= 25
°
C.
ENOBs and SINAD
vs Input Frequency (Bipolar)
SNR vs Input Frequency (Bipolar)
ENOBs and SINAD
vs Input Frequency (Unipolar)
SNR vs Input Frequency (Unipolar)
(Bipolar Mode Plots Run with Dual
±
5V Supplies.
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
4
3
E
S
6
5
8
7
1401 G01
2
1
0
12
11
10
9
26
20
38
32
50
44
14
8
2
74
68
62
56
f
SAMPLE
= 2.22MHz
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
–80
–90
T
–60
–70
–40
–50
1401 G02
–100
–110
–120
0
–20
–30
–10
THD
SFDR
2ND
3RD
f
SAMPLE
= 2.22MHz
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
–50
–56
S
–38
–44
–26
–32
1401 G03
–62
–68
–74
–2
–8
–14
–20
f
SAMPLE
= 2.22MHz
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
4
3
E
S
6
5
8
7
1401 G04
2
1
0
12
11
10
9
26
20
38
32
50
44
14
8
2
74
68
62
56
f
SAMPLE
= 2.22MHz
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
–80
–90
T
–60
–70
–40
–50
1401 G05
–100
–110
–120
0
–20
–30
–10
THD
SFDR
2ND
3RD
f
SAMPLE
= 2.22MHz
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
–50
–56
S
–38
–44
–26
–32
1401 G06
–62
–68
–74
–2
–8
–14
–20
f
SAMPLE
= 2.22MHz
5 Harmonic THD, 2nd, 3rd and
SFDR vs Input Frequency
(Bipolar)
5 Harmonic THD, 2nd, 3rd and
SFDR vs Input Frequency
(Unipolar)
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