参数资料
型号: HI5746KCB-T
厂商: Intersil
文件页数: 3/16页
文件大小: 0K
描述: CONV A/D 10BIT 40MSPS 28-SOIC
标准包装: 1,000
位数: 10
采样率(每秒): 40M
数据接口: 并联
转换器数目: 8
功率耗散(最大): 275 mW
电压电源: 模拟和数字
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
供应商设备封装: 28-SOIC W
包装: 带卷 (TR)
输入数目和类型: 2 个单端,单极;2 个单端,双极;1 个差分,单极;1 个差分,双极
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
, φ1
and
φ2, derived from the master sampling clock. During the
sampling phase,
φ1, the input signal is applied to the sampling
capacitors, CS. At the same time the holding capacitors, CH,
are discharged to analog ground. At the falling edge of
φ1 the
input signal is sampled on the bottom plates of the sampling
capacitors. In the next clock phase,
φ2, 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 CS and CH 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 VIN pins see only the on-resistance of a switch and
CS. 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 (VDC) 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
204060
80
TEMPERATURE (oC)
V
DC
(V)
3.20
3.10
9.0
8.8
8.6
8.4
8.2
-40
-20
0
2040
6080
E
N
OB
(BIT
S)
TEMPERATURE (oC)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
512
1023
FREQUENCY BIN
OUTPUT
LEVE
L
(dB)
fIN = 10MHz
fS = 40 MSPS
HI5746
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HI-574A_08 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Complete, 12-Bit A/D Converters with Converters with Microprocessor Interface