- 您现在的位置：买卖IC网 > PDF目录385380 > HI5746 (Intersil Corporation) 10-Bit, 40 MSPS A/D Converter(10位、采样速率为40MSPS的A/D转换器) PDF资料下载
参数资料
| 型号： | HI5746 |
| 厂商： | Intersil Corporation |
| 英文描述： | 10-Bit, 40 MSPS A/D Converter(10位、采样速率为40MSPS的A/D转换器) |
| 中文描述： | 10位，40 MSPS的的A / D转换器（10位，采样速率为40MSPS的的A / D转换器） |
| 文件页数： | 12/16页 |
| 文件大小： | 920K |
| 代理商： | HI5746 |
12
As illustrated in the functional block diagram and the timing
diagram in Figure 1, eight identical pipeline subconverter
stages, each containing a two-bit flash converter and a
two-bit multiplying digital-to-analog converter, follow the S/H
circuit with the ninth stage being a two bit flash converter.
Each converter stage in the pipeline will be sampling in one
phase and amplifying in the other clock phase. Each
individual subconverter clock signal is offset by 180 degrees
from the previous stage clock signal resulting in alternate
stages in the pipeline performing the same operation.
The output of each of the eight identical two-bit subconverter
stages is a two-bit digital word containing a supplementary bit
to be used by the digital error correction logic. The output of
each subconverter stage is input to a digital delay line which is
controlled by the internal sampling clock. The function of the
digital delay line is to time align the digital outputs of the eight
identical two-bit subconverter stages with the corresponding
output of the ninth stage flash converter before applying the
eighteen bit result to the digital error correction logic. The
digital error correction logic uses the supplementary bits to
correct any error that may exist before generating the final ten
bit digital data output of the converter.
Because of the pipeline nature of this converter, the digital
data representing an analog input sample is output to the
digital data bus on the 7th cycle of the clock after the analog
sample is taken. This time delay is specified as the data
latency. After the data latency time, the digital data
representing each succeeding analog sample is output
during the following clock cycle. The digital output data is
synchronized to the external sampling clock by a double
buffered latching technique. The output of the digital error
correction circuit is available in two’s complement or offset
binary format depending on the state of the Data Format
Select (DFS) control input (see Table 1, A/D Code Table).
Reference Voltage Inputs, V
REF
- and V
REF
+
The HI5746 is designed to accept two external reference
voltage sources at the V
REF
input pins. Typical operation of
the converter requires V
REF
+ to be set at +2.5V and V
REF
- to
be set at 2.0V. However, it should be noted that the input
structure of the V
REF
+ and V
REF
- input pins consists of a
resistive voltage divider with one resistor of the divider
(nominally 500
) connected between V
REF
+ and V
REF
- and
the other resistor of the divider (nominally 2000
) connected
between V
REF
- and analog ground. This allows the user the
option of supplying only the +2.5V V
REF
+ voltage reference
with the +2.0V V
REF
- being generated internally by the
voltage division action of the input structure.
The HI5746 is tested with V
REF
- equal to +2.0V and V
REF
+
equal to +2.5V yielding a fully differential analog input voltage
range of
±
0.5V. V
REF
+ and V
REF
- can differ from the above
voltages (see the Typical Performance Curves, Figure 8
through Figure 13).
In order to minimize overall converter noise it is recommended
that adequate high frequency decoupling be provided at
both
of the reference voltage input pins, V
REF
+ and V
REF
-.
Analog Input, Differential Connection
The analog input to the HI5746 is a differential input that can
be configured in various ways depending on the signal
source and the required level of performance. A fully
differential connection (Figure 26 and Figure 27) will give the
best performance for the converter.
Since the HI5746 is powered by a single +5V analog supply,
the analog input is limited to be between ground and +5V.
For the differential input connection this implies the analog
input common mode voltage can range from 0.25V to 4.75V.
The performance of the ADC does not change significantly
with the value of the analog input common mode voltage.
A DC voltage source, V
DC
equal to 3.2V (typical), is made
available to the user to help simplify circuit design when using
an AC coupled differential input. This low output impedance
voltage source is not designed to be a reference but makes an
excellent DC bias source and stays well within the analog
input common mode voltage range over temperature (see the
Typical Performance Curves, Figure 21).
For the AC coupled differential input (Figure 26) assume
the difference between V
REF
+, typically 2.5V, and V
REF
-,
typically 2.0V, is 0.5V. Full scale is achieved when the V
IN
and -V
IN
input signals are 0.5V
P- P
with -V
IN
being
180 degrees out of phase with V
IN
The converter will be
-
+
+
-
C
H
C
S
C
S
C
H
V
IN+
V
OUT+
V
OUT-
V
IN-
φ
1
φ
1
φ
1
φ
2
φ
1
φ
1
φ
1
FIGURE 25. ANALOG INPUT SAMPLE-AND-HOLD
V
IN
+
V
DC
V
IN
-
HI5746
V
IN
-V
IN
R
R
FIGURE 26. AC COUPLED DIFFERENTIAL INPUT
HI5746
相关PDF资料 |
PDF描述 |
|---|---|
| HI5762EVAL2 | Dual 10-Bit, 60MSPS A/D Converter with Internal Voltage Reference |
| HI5780JCQ | 10-Bit, 80 MSPS, High Speed, Low Power D/A Converter |
| HI5780 | 10-Bit, 80 MSPS, High Speed, Low Power D/A Converter |
| HI5780-EV | 10-Bit, 80 MSPS, High Speed, Low Power D/A Converter |
| HI5800-EV | 12-Bit, 3MSPS, Sampling A/D Converter |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HI5746_04 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 40MSPS A/D Converter |
| HI5746EVAL1 | 功能描述:EVALUATION PLATFORM HI5746 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| HI5746KCA | 功能描述:IC ADC 10-BIT 40MSPS 28-SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| HI5746KCAZ | 功能描述:模数转换器 - ADC A/D 10-BIT 40MSPS 28 SSOP COM TEMP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| HI5746KCB | 功能描述:CONV A/D 10BIT 40MSPS 28-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
发布紧急采购，3分钟左右您将得到回复。