參數(shù)資料
型號: HI5746
廠商: Intersil Corporation
英文描述: 10-Bit, 40 MSPS A/D Converter(10位、采樣速率為40MSPS的A/D轉(zhuǎn)換器)
中文描述: 10位,40 MSPS的的A / D轉(zhuǎn)換器(10位,采樣速率為40MSPS的的A / D轉(zhuǎn)換器)
文件頁數(shù): 11/16頁
文件大小: 920K
代理商: HI5746
11
Detailed Description
Theory of Operation
The HI5746 is a 10-bit fully differential sampling pipeline A/D
converter with digital error correction logic. Figure 25 depicts
the circuit for the front end differential-in-differential-out sample-
and-hold (S/H). The switches are controlled by an internal
sampling clock which is a non-overlapping two phase signal
, φ
1
and
φ
2
derived from the master sampling clock. During the
sampling phase,
φ
1
the input signal is applied to the sampling
capacitors, C
S
At the same time the holding capacitors, C
H
are discharged to analog ground. At the falling edge of
φ
1
the
input signal is sampled on the bottom plates of the sampling
capacitors. In the next clock phase,
φ
2
the two bottom plates of
the sampling capacitors are connected together and the
holding capacitors are switched to the op amp output nodes.
The charge then redistributes between C
S
and C
H
completing
one sample-and-hold cycle. The front end sample-and-hold
output is a fully-differential, sampled-data representation of the
analog input. The circuit not only performs the sample-and-hold
function but will also convert a single-ended input to a fully-
differential output for the converter core. During the sampling
phase, the V
IN
pins see only the on-resistance of a switch and
C
S
The relatively small values of these components result in a
typical full power input bandwidth of 250MHz for the converter.
FIGURE 21. DC BIAS VOLTAGE (V
DC
) vs TEMPERATURE
FIGURE 22. EFFECTIVE NUMBER OF BITS F(ENOB) vs
TEMPERATURE
FIGURE 23. 2048 POINT FFT PLOT
FIGURE 24. 2048 POINT FFT SPECTRAL PLOT
Typical Performance Curves
(Continued)
3.30
3.00
-40
-20
0
20
40
60
80
TEMPERATURE (
o
C)
V
D
(
3.20
3.10
9.0
8.8
8.6
8.4
8.2
-40
-20
0
TEMPERATURE (
o
C)
20
40
60
80
E
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
512
1023
FREQUENCY BIN
O
f
IN
= 10MHz
f
S
= 40 MSPS
HI5746
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相關代理商/技術(shù)參數(shù)
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