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| 型号： | ADA4528-1ARMZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP RRIO ZERODRIFT 8MSOP |
| 视频文件： | ADA4528: Lowest Noise, Zero-Drift Amplifier Enabling 24 bit Resolution |
| 标准包装： | 1,000 |
| 放大器类型： | 零漂移 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.5 V/µs |
| 增益带宽积： | 4MHz |
| 电流 - 输入偏压： | 90pA |
| 电压 - 输入偏移： | 0.3µV |
| 电流 - 电源： | 1.5mA |
| 电流 - 输出 / 通道： | 40mA |
| 电压 - 电源，单路/双路(±)： | 2.2 V ~ 5.5 V，±1.1 V ~ 2.75 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： | 带卷 (TR) |
ADA4528-1
Data Sheet
Rev. A | Page 16 of 20
The total equivalent rms noise over a specific bandwidth is
expressed as
eN,RMS = eN total √BW
where BW is the bandwidth in hertz.
This analysis is valid for broadband noise calculation. If the
bandwidth of concern includes the chopping frequency, more
complicated calculations must be made to include the effect of
the noise spike at the chopping frequency (see Figure 60).
With a low source resistance of RS < 1 kΩ, the voltage noise of
the amplifier dominates. As source resistance increases, the
thermal noise of RS dominates. As the source resistance further
increases, where RS > 100 kΩ, the current noise becomes the
main contributor of the total input noise. A good selection table
for low noise op amps can be found in the AN-940 Application
Note, Low Noise Amplifier Selection Guide for Optimal Noise
Performance.
Voltage Noise Density with Different Gain Configurations
Figure 58 shows the voltage noise density vs. closed-loop gain of
a zero-drift amplifier from Competitor A. The voltage noise density
of the amplifier increases from 11 nV/√Hz to 21 nV/√Hz as closed-
loop gain decreases from 1000 to 1. Figure 59 shows the voltage
noise density vs. frequency of the ADA4528-1 for three different
gain configurations. The ADA4528-1 offers lower input voltage
noise density of 6 nV/√Hz to 7 nV/√Hz regardless of gain
configurations.
24
20
16
12
8
4
0
1
10
100
1000
09
43
7-
0
61
VO
LT
AG
E
NO
IS
E
DE
NS
IT
Y
(
n
V
/√
Hz
)
CLOSED-LOOP GAIN (V/V)
VSY = 5V
f = 100Hz
COMPETITOR A
Figure 58. Competitor A: Voltage Noise Density vs. Closed-Loop Gain
1
10
100
1
10
100
1k
10k
VOL
TA
G
E
N
O
IS
E
D
E
N
S
IT
Y
(n
V/
√Hz
)
FREQUENCY (Hz)
AV = 10
AV = 100
AV = 1
VSY = 5V
VCM = VSY/2
0
943
7-
06
2
Figure 59. Voltage Noise Density vs. Frequency
Residual Ripple
Although the ACFB suppresses the chopping related ripples,
there exists higher noise spectrum at the chopping frequency
and its harmonics due to the remaining ripples. Figure 60 shows
the voltage noise density of the ADA4528-1 configured in unity
gain. A noise spike of 50 nV/√Hz can be seen at the chopping
frequency of 200 kHz. This noise spike is significant when the
op amp has a closed-loop frequency that is higher than the
chopping frequency. To further suppress the noise to a desired
level, it is recommended to have a post filter at the output of the
amplifier.
1
10
100
1
10
100
1k
10k
100k
1M
10M
VO
LT
AG
E
NO
IS
E
DE
NS
IT
Y
(
n
V
/√
Hz
)
FREQUENCY (Hz)
09
43
7-
0
63
VSY = 5V
VCM = VSY/2
AV = 1
Figure 60. Voltage Noise Density
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4528-1ARMZ-RL | 功能描述:IC OP AMP RRIO ZERODRIFT 8MSOP 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) |
| ADA4528-2ACPZ-R7 | 制造商:Analog Devices 功能描述:SP Amp Zero Drift Amplifier Dual R-R I/O ±2.75V/5.5V 8-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:LOW NOISE RRIO ZERO DRIFT DUAL OPAMP - Tape and Reel 制造商:Analog Devices Inc. 功能描述:Precision Amplifiers Low Noise RRIO Zero Drift Dual OpAmp |
| ADA4528-2ACPZ-RL | 制造商:Analog Devices 功能描述:SP Amp Zero Drift Amplifier Dual R-R I/O ±2.75V/5.5V 8-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:LOW NOISE RRIO ZERO DRIFT DUAL OPAMP - Tape and Reel 制造商:Analog Devices 功能描述:IC OPAMP GP RRIO 4MHZ ZD 8LFCSP 制造商:Analog Devices Inc. 功能描述:Precision Amplifiers Low Noise RRIO Zero Drift Dual OpAmp |
| ADA4528-2ARMZ | 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R I/O 制造商:Analog Devices 功能描述:LOW NOISE RRIO ZERO DRIFT DUAL OPAMP - Rail/Tube 制造商:Analog Devices 功能描述:IC OP AMP RRIO ZERODRIFT 8MSOP 制造商:Analog Devices 功能描述:OP AMP DUAL 2.2V/5.5V 4MHZ 制造商:Analog Devices 功能描述:OP AMP, DUAL, 2.2V/5.5V, 4MHZ, 8MSOP 制造商:Analog Devices Inc. 功能描述:Precision Amplifiers Low Noise RRIO Zero Drift Dual OpAmp 制造商:Analog Devices 功能描述:OP AMP, ZERO DRIFT, 3.4MHZ, 0.5V/s, MSOP-8; Op Amp Type:Zero Drift; No. of Amplifiers:2; Slew Rate:0.5V/s; Supply Voltage Range:2.2V to 5.5V; Amplifier Case Style:MSOP; No. of Pins:8; Bandwidth:3.4MHz; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes 制造商:Analog Devices 功能描述:OP AMP, DUAL, 2.2V/5.5V, 4MHZ, 8MSOP; Op Amp Type:Zero Drift; No. of Amplifiers:2; Slew Rate:0.5V/s; Supply Voltage Range:2.2V to 5.5V; Amplifier Case Style:MSOP; No. of Pins:8; Bandwidth:3.4MHz; Operating Temperature Min:-40C; ;RoHS Compliant: Yes 制造商:Analog Devices 功能描述:AMPLIFIER - OP AMPS |
| ADA4528-2ARMZ_PROMO | 制造商:Analog Devices 功能描述:OP AMP DUAL 2.2V/5.5V 4MHZ |
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