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| 型号： | AD823AARZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP FET RR 17MHZ DUAL 8SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | J-FET |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 35 V/µs |
| -3db带宽： | 19MHz |
| 电流 - 输入偏压： | 1.3pA |
| 电压 - 输入偏移： | 700µV |
| 电流 - 电源： | 6.3mA |
| 电流 - 输出 / 通道： | 44mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 36 V，±1.5 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) |
Data Sheet
AD823A
Rev. | Page 15 of 20
APPLICATIONS INFORMATION
INPUT CHARACTERISTICS
In the AD823A, N-channel JFETs provide a low offset, low noise,
high impedance input stage. Minimum input common-mode
voltage extends from 0.2 V below VS to 1.2 V < +VS. Driving
the input voltage closer to the positive rail causes a loss of
amplifier bandwidth and increased common-mode voltage error.
The AD823A does not exhibit phase reversal for input voltages
up to and including +VS. Figure 39 shows the response of an
input. The input and output are superimposed. The output
polarity tracks the input polarity up to +VS, with no phase
reversal. The reduced bandwidth above a 4 V input causes the
rounding of the output waveform. For input voltages greater
input prevents phase reversal, at the expense of greater input
voltage noise. The value of RP ranges from 1 kΩ to 10 kΩ. This
is illustrated in Figure 40.
2.5V
0V
5.0V
1V
2s
09439-
064
INPUT
OUTPUT
Figure 39. Input and Output Response: RP = 0 k, VIN = 0 V to +VS
5V
VIN
RP
VOUT
AD823A
09439-
039
3V
0V
6V
1V
10s
INPUT
OUTPUT
Figure 40. Input and Output Response: VIN = 0 V to +VS + 1 V,
VOUT = 0 V to +VS + 400 mV, RP = 4.99 k
Because the input stage uses N-channel JFETs, input current
during normal operation is negative; the current flows out from the
input terminals. If the input voltage is driven more positive than
+VS 0.7 V, the input current reverses direction as internal device
junctions become forward biased. This is illustrated in Figure 11.
A current limiting resistor should be used in series with the input
of the AD823A if the input voltage can be driven over 300 mV
more positive than +Vs or 300 mV more negative than –Vs. The
amplifier will be damaged if either condition persists for more than
10 seconds. A 1 kΩ resistor in series with the AD823A input allows
the amplifier to withstand up to 10 V of continuous overvoltage
and increases input voltage noise by a negligible amount.
The AD823A is designed for 14 nV/√Hz wideband input voltage
noise (see Figure 19). This noise performance, along with the
AD823A low input current and current noise, means that the
AD823A contributes negligible noise for applications with high
source resistances. Figure 41 shows that the source resistance
contributes to negligible noise for source impedances lower
than 10 k. The low input capacitance of 0.6 pF also means that
one can use a source impedance up to 13 k without cutting
into the G = +1 small signal bandwidth region.
N
O
ISE
(n
V/
H
z)
1
10
100
1k
10k
100k
100
09439-
338
SOURCE RESISTANCE (Ω)
TOTAL AMPLIFIER NOISE
AMPLIFIER VOLTAGE AND
CURRENT NOISE
SOURCE RESISTANCE
NOISE
Figure 41. RTI Noise vs. Source Resistance
OUTPUT CHARACTERISTICS
The unique bipolar rail-to-rail output stage of the amplifier swings
within 20 mV of the supplies with no external resistive load.
The approximate output saturation resistance of the AD823A
is 33 sourcing and sinking. This can be used to estimate the
output saturation voltage when driving heavier current loads.
For instance, when driving 5 mA, the saturation voltage to the
rails is approximately 165 mV.
B
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相关代理商/技术参数 |
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|---|---|
| AD823AN | 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R O/P 制造商:Rochester Electronics LLC 功能描述:DUAL FET R-TO-R 12MHZ AMP - Bulk 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD823AN | 制造商:Analog Devices 功能描述:GENERAL USAGE DUAL OP-AMP(2030031)((NS)) |
| AD823ANZ | 功能描述:IC OPAMP JFET R-R DUAL LN 8DIP 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:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD823ANZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC 制造商:Analog Devices 功能描述:IC, OP-AMP, 16MHZ, 25V/s, 0.8mV, DIP-8 |
| AD823AR | 功能描述:IC OPAMP JFET R-R DUAL LN 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:150 系列:- 放大器类型:音频 电路数:2 输出类型:- 转换速率:5 V/µs 增益带宽积:12MHz -3db带宽:- 电流 - 输入偏压:100nA 电压 - 输入偏移:500µV 电流 - 电源:6mA 电流 - 输出 / 通道:50mA 电压 - 电源，单路/双路(±):4 V ~ 32 V，±2 V ~ 16 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:8-TSSOP 包装:管件 |
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