参数资料
| 型号： | AD9744ARZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/32页 |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT 210MSPS 28-SOIC |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 1,000 |
| 系列： | TxDAC® |
| 设置时间： | 11ns |
| 位数： | 14 |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 电压电源： | 模拟和数字 |
| 功率耗散（最大）： | 145mW |
| 工作温度： | -40°C ~ 85°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) |
| 输出数目和类型： | 2 电流，单极；2 电流，双极 |
| 采样率（每秒）： | 210M |
| 配用： | AD9744ACP-PCBZ-ND - BOARD EVAL FOR AD9744ACP |
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页当前第11页第12页第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页第29页第30页第31页第32页
Data Sheet
AD9744
Rev. C | Page 19 of 32
these switches, the PSRR is very code dependent. This can produce
a mixing effect that can modulate low frequency power supply
noise to higher frequencies. Worst-case PSRR for either one of
the differential DAC outputs will occur when the full-scale current
is directed toward that output. As a result, the PSRR measurement
in Figure 39 represents a worst-case condition in which the
digital inputs remain static and the full-scale output current of
20 mA is directed to the DAC output being measured.
An example serves to illustrate the effect of supply noise on the
analog supply. Suppose a switching regulator with a switching
frequency of 250 kHz produces 10 mV of noise and, for
simplicity’s sake (ignoring harmonics), all of this noise is
concentrated at 250 kHz. To calculate how much of this
undesired noise will appear as current noise superimposed on
the DAC’s full-scale current, IOUTFS, one must determine the
PSRR in dB using Figure 39 at 250 kHz. To calculate the PSRR
for a given RLOAD, such that the units of PSRR are converted
from A/V to V/V, adjust the curve in Figure 39 by the scaling
factor 20 log (RLOAD). For instance, if RLOAD is 50 , the PSRR
is reduced by 34 dB (that is, PSRR of the DAC at 250 kHz,
Proper grounding and decoupling should be a primary
objective in any high speed, high resolution system. The
AD9744 features separate analog and digital supplies and
ground pins to optimize the management of analog and digital
ground currents in a system. In general, AVDD, the analog
supply, should be decoupled to ACOM, the analog common, as
close to the chip as physically possible. Similarly, DVDD, the
digital supply, should be decoupled to DCOM as close to the
chip as physically possible.
For those applications that require a single 3.3 V supply for both
the analog and digital supplies, a clean analog supply may be
generated using the circuit shown in Figure 40. The circuit
consists of a differential LC filter with separate power supply
and return lines. Lower noise can be attained by using low ESR
type electrolytic and tantalum capacitors.
Figure 40. Differential LC Filter for Single 3.3 V Applications
100
F
ELECT.
0.1
F
CER.
TTL/CMOS
LOGIC
CIRCUITS
3.3V
POWER SUPPLY
FERRITE
BEADS
AVDD
ACOM
10
F–22F
TANT.
02913-037
相关PDF资料 |
PDF描述 |
|---|---|
| V48A5H400BL3 | CONVERTER MOD DC/DC 5V 400W |
| V48A5H400BG | CONVERTER MOD DC/DC 5V 400W |
| V48A5H400B2 | CONVERTER MOD DC/DC 5V 400W |
| V48A3V3H264BL3 | CONVERTER MOD DC/DC 3.3V 264W |
| V48A3V3H264BG | CONVERTER MOD DC/DC 3.3V 264W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9744ARZRL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 210 MSPS TxDAC㈢ D/A Converter |
| AD9744-EB | 制造商:Analog Devices 功能描述:AD9744 EVALUATION BOARD (AD9744-EB) - Bulk |
| AD9745 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual 8-/10-/12-/14-/16-Bit 250 MSPS Digital-to-Analog Converters |
| AD9745BCPZ | 功能描述:IC DAC 2CH 12BIT 250MSPS 72LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:1 系列:- 设置时间:4.5µs 位数:12 数据接口:串行，SPI? 转换器数目:1 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOICN 包装:剪切带 (CT) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:* 其它名称:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| AD9745BCPZRL | 功能描述:IC DAC DUAL 12B 250MSPS 72-LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
发布紧急采购，3分钟左右您将得到回复。