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參數(shù)資料
| 型號： | HI5740 |
| 英文描述： | 3V， Dual 10-Bit， 20/ 40/60 MSPS A/D Converter with Internal Voltage Reference (2 pages) FN4821 |
| 中文描述： | 3V供電，雙路10位，20 / 40/60 MSPS的A / D轉(zhuǎn)換內(nèi)部電壓基準（2頁）FN4821轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/11頁 |
| 文件大?。?/td> | 79K |
| 代理商： | HI5740 |
3-11
All Intersil semiconductor products are manufactured, assembled and tested under
ISO9000
quality systems certification.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site
www.intersil.com
I/Q
IN
- = +0.5V) and will be at negative full scale when I/Q
IN
+
is equal to V
DC
- 0.5V (I/Q
IN
+ - I/Q
IN
- = -0.5V). Sufficient
headroom must be provided such that the input voltage
never goes above +3V or below AGND. In this case, V
DC
could range between 0.5V and 2.5V without a significant
change in ADC performance. The simplest way to produce
VDC is to use the I/Q
VRIN
bias source, I/QV
DC
, output of
the ISL5740.
The single ended analog input can be DC coupled
(Figure 19) as long as the input is within the analog input
common mode voltage range.
The resistor, R, in Figure 19 is not absolutely necessary but
may be used as a load setting resistor. A capacitor, C,
connected from I/Q
IN
+ to I/Q
IN
- will help filter any high
frequency noise on the inputs, also improving performance.
Values around 20pF are sufficient and can be used on AC
coupled inputs as well. Note, however, that the value of
capacitor C chosen must take into account the highest
frequency component of the analog input signal.
A single ended source may give better overall system
performance if it is first converted to differential before
driving the ISL5740.
Operational Mode
The ISL5740 contains several operational modes including a
normal two channel operation, placing one or both channels
in standby and delaying the Q channel data 1/2 clock cycle.
The operational mode is selected via the S1 and S2 pins and
is asynchronous to either clock. When either channel is
placed in standby, the output data is stalled and not high
impedance. When recovering from standby, valid data is
available after 20 clock cycles.
The delay mode can be used to set the Q channel 180
degrees out phase of the I channel if the same clock is
driving both channels. If separate, inverted clocks are used
for the I and Q channels, this feature can be used to align the
data.
Sampling Clock Requirements
The ISL5740 sampling clock input provides a standard high-
speed interface to external TTL/CMOS logic families.
In order to ensure rated performance of the ISL5740, the
duty cycle of the clock should be held at 50%
±
5%. It must
also have low jitter and operate at standard TTL/CMOS
levels.
Performance of the ISL5740 will only be guaranteed at
conversion rates above 1MSPS (Typ). This ensures proper
performance of the internal dynamic circuits. Similarly, when
power is first applied to the converter, a maximum of 20
cycles at a sample rate above 1MSPS must be performed
before valid data is available.
Supply and Ground Considerations
The ISL5740 has separate analog and digital supply and
ground pins to keep digital noise out of the analog signal
path. The part should be mounted on a board that provides
separate low impedance connections for the analog and
digital supplies and grounds. For best performance, the
supplies to the ISL5740 should be driven by clean, linear
regulated supplies. The board should also have good high
frequency decoupling capacitors mounted as close as
possible to the converter. If the part is powered off a single
supply then the analog supply can be isolated by a ferrite
bead from the digital supply.
Refer to the application note “Using Intersil High Speed A/D
Converters” (AN9214) for additional considerations when
using high speed converters.
I/Q
IN
+
I/Q
IN
-
ISL5740
V
DC
R
C
V
IN
V
DC
FIGURE 7. DC COUPLED SINGLE ENDED INPUT
OPERATIONAL MODES
S1
S2
MODE
0
0
Standby I and Q Channels.
0
1
I channel operates normally with Q Channel in
standby mode.
1
0
I and Q Channels operating with I/Q output data in
phase.
1
1
I and Q Channels operating with Q data 180 degrees
out of phase.
ISL5740
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PDF描述 |
|---|---|
| HI5741BIB-T | 14-Bit Digital-to-Analog Converter |
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| HI5746KCA | 10-Bit, 40 MSPS A/D Converter |
| HI5746KCB | 10-Bit, 40 MSPS A/D Converter |
| HI5746EVAL1 | 10-Bit, 40 MSPS A/D Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HI5741 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:14-Bit, 100MSPS, High Speed D/A Converter |
| HI5741_06 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:14-Bit, 100MSPS, High Speed D/A Converter |
| HI5741BIB | 功能描述:IC DAC 14-BIT 100MSPS 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標準包裝:2,400 系列:- 設置時間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應商設備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
| HI5741BIBS2503 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HI5741BIB-T | 功能描述:DAC 14BIT 100MHZ 5.2V 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標準包裝:2,400 系列:- 設置時間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應商設備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
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