- 您现在的位置：买卖IC网 > PDF目录10135 > AD7623ASTZRL (Analog Devices Inc)IC ADC 16BIT 1.33MSPS DFF 48LQFP PDF资料下载
参数资料
| 型号： | AD7623ASTZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 1.33MSPS DFF 48LQFP |
| 标准包装： | 2,000 |
| 系列： | PulSAR® |
| 位数： | 16 |
| 采样率（每秒）： | 1.33M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 55mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，双极 |
| 配用： | EVAL-AD7623CBZ-ND - BOARD EVALUATION FOR AD7623 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
AD7623
Rev. 0 | Page 20 of 28
Power-Up
At power-up, or returning to operational mode from the power-
down mode (PD = high), the AD7623 engages an initialization
process. During this time, the first 128 conversions should be
ignored or the RESET input could be pulsed to engage a faster
initialization process. Refer to the Digital Interface section for
RESET and timing details.
A simple power-on reset circuit, as shown in Figure 23, can be
used to minimize the digital interface. As OVDD powers up, the
capacitor is shorted and brings RESET high; it is then charged,
returning RESET to low. However, this circuit only works when
powering up the AD7623 because the power-down mode
(PD = high) does not power down any of the supplies. As a
result, RESET is low.
POWER DISSIPATION VS. THROUGHPUT
The AD7623 automatically reduces its power consumption at
the end of each conversion phase. During the acquisition phase,
the operating currents are very low, which allows a significant
power savings when the conversion rate is reduced (see Figure 30).
This feature makes the AD7623 ideal for very low power,
battery-operated applications.
It should be noted that the digital interface remains active even
during the acquisition phase. To reduce the operating digital
supply currents even further, drive the digital inputs close to the
power rails (that is, OVDD and OGND).
05574-030
SAMPLING RATE (SPS)
POW
E
R
D
ISSIPA
TION
(
μW)
100
100k
10k
1k
100
1k
10k
100k
1M
10M
PDREF = PDBUF = HIGH
Figure 30. Power Dissipation vs. Sample Rate
CONVERSION CONTROL
The AD7623 is controlled by the CNVST input. A falling edge
on CNVST is all that is necessary to initiate a conversion.
Detailed timing diagrams of the conversion process are shown
in Figure 31. Once initiated, it cannot be restarted or aborted,
even by the power-down input, PD, until the conversion is
complete. The CNVST signal operates independently of CS and
RD signals.
05574-
031
BUSY
MODE
CONVERT
ACQUIRE
CONVERT
CNVST
t1
t2
t4
t3
t5
t6
t7
t8
Figure 31. Basic Conversion Timing
For optimal performance, the rising edge of CNVST should not
occur after the maximum CNVST low time, t1, or until the end
of conversion.
Although CNVST is a digital signal, it should be designed with
special care with fast, clean edges, and levels with minimum
overshoot, undershoot, or ringing.
The CNVST trace should be shielded with ground, and a low
value (such as 50 Ω) serial resistor termination should be added
close to the output of the component that drives this line. Also,
a 60 pF capacitor is recommended to further reduce the effects
of overshoot and undershoot, as shown in Figure 23.
For applications where SNR is critical, the CNVST signal should
have very low jitter. This can be achieved by using a dedicated
oscillator for CNVST generation, or by clocking CNVST with a
high frequency, low jitter clock, as shown in Figure 23.
相关PDF资料 |
PDF描述 |
|---|---|
| AD7703BRZ-REEL | IC ADC 20BIT LC2MOS MONO 20SOIC |
| MS27467T17B26SC | CONN PLUG 26POS STRAIGHT W/SCKT |
| AD7703BR-REEL | IC ADC 20BIT LC2MOS MONO 20-SOIC |
| MS27467T17B26SB | CONN PLUG 26POS STRAIGHT W/SCKT |
| AD8392AAREZ-R7 | IC LINE DRVR ADSL/ADSL 28-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7623BD | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Data Acquisition |
| AD7625 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 6MSPS PulSAR Differential ADC |
| AD7625BCPZ | 功能描述:IC ADC 16BIT 6MSPS SAR 32LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7625BCPZRL7 | 功能描述:IC ADC 16BIT 6MSPS SAR 32LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7626 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 10 MSPS, PulSAR Differential ADC |
发布紧急采购，3分钟左右您将得到回复。