- 您现在的位置：买卖IC网 > PDF目录16933 > ADA4858-3ACP-EBZ (Analog Devices Inc)BOARD EVAL FOR ADA4858-3ACP PDF资料下载
参数资料
| 型号： | ADA4858-3ACP-EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADA4858-3ACP |
| 标准包装： | 1 |
| 每 IC 通道数： | 3 - 三 |
| 放大器类型： | 电流反馈 |
| 板类型： | 裸（未填充） |
| 已供物品： | 板 |
| 已用 IC / 零件： | 16-LFCSP 封装 |
ADA4858-3
Data Sheet
Rev. B | Page 16 of 20
PD (POWER-DOWN) PIN
The ADA4858-3 is equipped with a PD (power-down) pin for
all three amplifiers. This allows the user to reduce the quiescent
supply current when an amplifier is not active. The power-down
threshold levels are derived from ground level. The amplifiers are
powered down when the voltage applied to the PD pin is greater
than a certain voltage from ground. In a 5 V supply application, the
voltage is greater than 2 V, and in a 3.3 V supply application, the
voltage is greater than 1.5 V. The amplifier is enabled whenever the
PD pin is connected to ground. If the PD pin is not used, it is
best to connect it to ground. Note that the power-down feature
does not control the charge pump output voltage and current.
Table 6. Power-Down Voltage Control
PD Pin
5 V
3.3 V
Not active
<1.5 V
<1 V
Active
>2 V
>1.5 V
POWER SUPPLY BYPASSING
Careful attention must be paid to bypassing the power supply
pins of the ADA4858-3. High quality capacitors with low
equivalent series resistance (ESR), such as multilayer ceramic
capacitors (MLCCs), should be used to minimize supply
voltage ripple and power dissipation. A large, usually tantalum,
capacitor between 2.2 F to 47 F located in proximity to the
ADA4858-3 is required to provide good decoupling for lower
frequency signals. The actual value is determined by the circuit
transient and frequency requirements. In addition, place 0.1 F
MLCC decoupling capacitors as close to each of the power
supply pins and across from both supplies as is physically
possible, no more than 1/8 inch away. The ground returns
should terminate immediately into the ground plane. Placing
the bypass capacitor return close to the load return minimizes
ground loops and improves performance.
LAYOUT
As is the case with all high speed applications, careful attention
to printed circuit board (PCB) layout details prevents associated
board parasitics from becoming problematic. The ADA4858-3 can
operate at up to 600 MHz; therefore, proper RF design techniques
must be employed. The PCB should have a ground plane covering
all unused portions of the component side of the board to provide a
low impedance return path. Removing the ground plane on all
layers from the area near and under the input and output pins
reduces stray capacitance. Keep signal lines connecting the
feedback and gain resistors as short as possible to minimize the
inductance and stray capacitance associated with these traces.
Place termination resistors and loads as close as possible to their
respective inputs and outputs. Keep input and output traces as
far apart as possible to minimize coupling (crosstalk) through the
board. Adherence to microstrip or stripline design techniques for
long signal traces (greater than 1 inch) is recommended. For
more information on high speed board layout, see “A Practical
Dialogue, Volume 39, Number 3, September 2005.
相关PDF资料 |
PDF描述 |
|---|---|
| ADA4891-2ARM-EBZ | BOARD EVAL FOR ADA4891-2ARM |
| ADA4861-3YR-EBZ | BOARD EVAL FOR ADA4861-3YR |
| ESM08DTMD-S189 | CONN EDGECARD 16POS R/A .156 SLD |
| 3-556127-9 | CABLE ASSY PWR-PWR 8 WIRE 144" |
| 1-556127-4 | CABLE ASSY PWR-PWR 8 WIRE 140" |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4858-3ACPZ-R2 | 制造商:Analog Devices 功能描述:OP AMP TRIPLE CURRENT FDBK 5.5V 16LFCSP EP - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:IC OP-AMP 600MHZ 600V/ LFCSP-16 制造商:Analog Devices 功能描述:Single Supply High Spd RR Video Amp 制造商:Analog Devices 功能描述:IC, OP-AMP, 600MHZ, 600V/s, LFCSP-16, Op Amp Type:High Speed, No. of Amplifiers:3, Bandwidth:600MHz, Slew Rate:600V/s, Supply Voltage Range:3V to 5.5V, Amplifier Case Style:LFCSP, No. of Pins:16 , RoHS Compliant: Yes |
| ADA4858-3ACPZ-R7 | 功能描述:IC OPAMP CF TRPL LP 21MA 16LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:100 系列:- 放大器类型:通用 电路数:1 输出类型:- 转换速率:0.2 V/µs 增益带宽积:- -3db带宽:- 电流 - 输入偏压:100pA 电压 - 输入偏移:30µV 电流 - 电源:380µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):±2 V ~ 18 V 工作温度:0°C ~ 70°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-SO 包装:管件 |
| ADA4858-3ACPZ-RL | 功能描述:IC OPAMP CF TRPL LP 21MA 16LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| ADA4859-3 | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Supply, Fixed G = 2, High Speed, Video Amplifier with Charge Pump |
| ADA4859-3ACP-EBZ | 功能描述:BOARD EVAL FOR ADA4859-3ACP RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
发布紧急采购，3分钟左右您将得到回复。