参数资料
| 型号： | ADA4851-2YRMZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/25页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP VF R-R DUAL LP 8MSOP |
| 标准包装： | 50 |
| 放大器类型： | 电压反馈 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 375 V/µs |
| -3db带宽： | 105MHz |
| 电流 - 输入偏压： | 2.2µA |
| 电压 - 输入偏移： | 600µV |
| 电流 - 电源： | 2.9mA |
| 电流 - 输出 / 通道： | 83mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，±1.35 V ~ 6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 768 (CN2011-ZH PDF) |
ADA4851-1/ADA4851-2/ADA4851-4
Rev. J | Page 17 of 24
CIRCUIT DESCRIPTION
The ADA4851-1/ADA4851-2/ADA4851-4 feature a high slew
rate input stage that is a true single-supply topology, capable of
sensing signals at or below the negative supply rail. The rail-to-
rail output stage can pull within 60 mV of either supply rail when
driving light loads and within 0.17 V when driving 150 Ω. High
speed performance is maintained at supply voltages as low as 2.7 V.
HEADROOM CONSIDERATIONS
These amplifiers are designed for use in low voltage systems.
To obtain optimum performance, it is useful to understand the
behavior of the amplifiers as input and output signals approach
the headroom limits of the amplifiers. The input common-mode
voltage range of the amplifiers extends from the negative supply
voltage (actually 200 mV below the negative supply), or from
ground for single-supply operation, to within 2.2 V of the positive
supply voltage. Therefore, at a gain of 3, the amplifiers can
provide full rail-to-rail output swing for supply voltages as low
as 3.3 V and down to 3 V for a gain of 4.
Exceeding the headroom limit is not a concern for any inverting
gain on any supply voltage as long as the reference voltage at the
positive input of the amplifier lies within the input common- mode
range of the amplifier.
The input stage is the headroom limit for signals approaching
the positive rail. Figure 40 shows a typical offset voltage vs. the
input common-mode voltage for the ADA4851-1/ADA4851-2/
ADA4851-4 amplifiers on a ±5 V supply. Accurate dc performance
is maintained from approximately 200 mV below the negative
supply to within 2.2 V of the positive supply. For high speed
signals, however, there are other considerations. Figure 41
shows 3 dB bandwidth vs. input common-mode voltage for a
unity-gain follower. As the common-mode voltage approaches
2 V of positive supply, the amplifier responds well but the
bandwidth begins to drop as the common-mode voltage
approaches the positive supply. This can manifest itself in
increased distortion or settling time. Higher frequency signals
require more headroom than the lower frequencies to maintain
distortion performance.
600
580
560
540
520
500
480
460
440
–6
–5
–4
–3
–2
–1
0
1
2
3
4
V
OS
(
μV)
VCM (V)
05143-046
Figure 40. VOS vs. Common-Mode Voltage, VS = ±5 V
–6
–5
–4
–3
–2
–1
0
1
GAIN
(
d
B)
0.1
10
1
100
05143-050
FREQUENCY (MHz)
2
1000
G = +1
RL = 1kΩ
VS = 5V
VCM = 3.0V
VCM = 3.1V
VCM = 3.2V
VCM = 3.3V
Figure 41. Unity-Gain Follower Bandwidth vs. Input Common-Mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4851-2YRMZ-RL | 功能描述:IC OPAMP VF R-R DUAL LP 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
| ADA4851-2YRMZ-RL7 | 功能描述:IC OPAMP VF R-R DUAL LP 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
| ADA4851-4 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Cost, High Speed, Rail-to-Rail, Output Op Amps |
| ADA4851-4WYRUZ-R7 | 功能描述:IC OPAMP QUAD R-R HS 14-TSSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°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:带卷 (TR) |
| ADA4851-4YRU-EBZ | 功能描述:BOARD EVAL FOR ADA4851-4YRU RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
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