参数资料
| 型号： | AD8629ARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP CHOPPER R-R DUAL 8SOIC |
| 标准包装： | 98 |
| 放大器类型： | 零漂移 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 1 V/µs |
| 增益带宽积： | 2.5MHz |
| -3db带宽： | 2.5MHz |
| 电流 - 输入偏压： | 30pA |
| 电压 - 输入偏移： | 1µV |
| 电流 - 电源： | 850µA |
| 电流 - 输出 / 通道： | 30mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 5 V，±1.35 V ~ 2.5 V |
| 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-SO |
| 包装： | 管件 |
| 产品目录页面： | 767 (CN2011-ZH PDF) |
Data Sheet
AD8628/AD8629/AD8630
Rev. J | Page 15 of 24
FUNCTIONAL DESCRIPTION
precision rail-to-rail input and output operational amplifiers.
The typical offset voltage of less than 1 V allows these amplifiers
to be easily configured for high gains without risk of excessive
output voltage errors. The extremely small temperature drift
of 2 nV/°C ensures a minimum offset voltage error over their
entire temperature range of 40°C to +125°C, making these
amplifiers ideal for a variety of sensitive measurement applica-
tions in harsh operating environments.
through a patented combination of auto-zeroing and chopping.
maintain their low offset voltage over a wide temperature range
also optimize the noise and bandwidth over previous generations
of auto-zero amplifiers, offering the lowest voltage noise of any
auto-zero amplifier by more than 50%.
Previous designs used either auto-zeroing or chopping to add
precision to the specifications of an amplifier. Auto-zeroing
results in low noise energy at the auto-zeroing frequency, at the
expense of higher low frequency noise due to aliasing of wideband
noise into the auto-zeroed frequency band. Chopping results in
lower low frequency noise at the expense of larger noise energy
family uses both auto-zeroing and chopping in a patented ping-
pong arrangement to obtain lower low frequency noise together
with lower energy at the chopping and auto-zeroing frequencies,
maximizing the signal-to-noise ratio for the majority of
applications without the need for additional filtering. The
relatively high clock frequency of 15 kHz simplifies filter
requirements for a wide, useful noise-free bandwidth.
The AD8628 is among the few auto-zero amplifiers offered in
the 5-lead TSOT package. This provides a significant improvement
over the ac parameters of the previous auto-zero amplifiers. The
bandwidth (0 Hz to 10 kHz) and can be used where the highest
dc precision is required. In systems with signal bandwidths of
true 16-bit accuracy, making them the best choice for very high
resolution systems.
1/f NOISE
1/f noise, also known as pink noise, is a major contributor to
errors in dc-coupled measurements. This 1/f noise error term
can be in the range of several V or more, and, when amplified
with the closed-loop gain of the circuit, can show up as a large
output offset. For example, when an amplifier with a 5 V p-p
1/f noise is configured for a gain of 1000, its output has 5 mV of
eliminate 1/f noise internally, thereby greatly reducing output errors.
The internal elimination of 1/f noise is accomplished as follows.
AD8630 inputs. Auto-zeroing corrects any dc or low frequency
offset. Therefore, the 1/f noise component is essentially removed,
system applications over competitive auto-zero amplifiers is their
very low noise. The comparison shown in Figure 49 indicates
an input-referred noise density of 19.4 nV/√Hz at 1 kHz for
the AD8628, which is much better than the Competitor A
and Competitor B. The noise is flat from dc to 1.5 kHz, slowly
increasing up to 20 kHz. The lower noise at low frequency is
desirable where auto-zero amplifiers are widely used.
02735-
046
MK AT 1kHz FOR ALL 3 GRAPHS
FREQUENCY (kHz)
VOLTA
GE
N
OIS
ED
EN
SITY
(nV
/√
H
z)
120
105
90
75
60
45
30
15
0
4
2
8
6
10
12
COMPETITOR A
(89.7nV/√Hz)
COMPETITOR B
(31.1nV/√Hz)
AD8628
(19.4nV/√Hz)
Figure 49. Noise Spectral Density of AD8628 vs. Competition
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8629ARZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier |
| AD8629ARZ-REEL | 功能描述:IC OPAMP CHOPPER R-R DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| AD8629ARZ-REEL7 | 功能描述:IC OPAMP CHOPPER R-R DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| AD8629D703L | 制造商:Analog Devices 功能描述:AEROSPACE ZERO DRIFT, SINGLE-SUPPLY, RAIL-TO-RAIL INPUT/OUTP - Rail/Tube |
| AD8629S | 制造商:AD 制造商全称:Analog Devices 功能描述:Zero-Drift, Single-Supply Rail-to-Rail Input/Output Operational Amplifier |
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