参数资料
| 型号： | AD8512BRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP JFET 8MHZ DUAL LN 8SOIC |
| 设计资源： | Precision, Bipolar Configuration for the AD5546/56 DAC (CN0024) Precision, Bipolar, Configuration for AD5547/AD5557 DAC (CN0028) |
| 标准包装： | 98 |
| 放大器类型： | J-FET |
| 电路数： | 2 |
| 转换速率： | 20 V/µs |
| 增益带宽积： | 8MHz |
| 电流 - 输入偏压： | 25pA |
| 电压 - 输入偏移： | 80µV |
| 电流 - 电源： | 2.2mA |
| 电流 - 输出 / 通道： | 70mA |
| 电压 - 电源，单路/双路(±)： | ±4.5 V ~ 18 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： | 772 (CN2011-ZH PDF) |
AD8510/AD8512/AD8513
Rev. I | Page 13 of 20
GENERAL APPLICATION INFORMATION
INPUT OVERVOLTAGE PROTECTION
The AD8510/AD8512/AD8513 have internal protective
circuitry that allows voltages as high as 0.7 V beyond the
supplies to be applied at the input of either terminal without
causing damage. For higher input voltages, a series resistor is
necessary to limit the input current. The resistor value can be
determined from the formula
mA
5
≤
S
IN
R
V
With a very low offset current of <0.5 nA up to 125°C, higher
resistor values can be used in series with the inputs. A 5 kΩ
resistor protects the inputs from voltages as high as 25 V
beyond the supplies and adds less than 10 μV to the offset.
OUTPUT PHASE REVERSAL
Phase reversal is a change of polarity in the transfer function of
the amplifier. This can occur when the voltage applied at the
input of an amplifier exceeds the maximum common-mode
voltage.
Phase reversal can cause permanent damage to the device and
can result in system lockups. The AD8510/AD8512/AD8513 do
not exhibit phase reversal when input voltages are beyond the
supplies.
TIME (20s/DIV)
02
72
9-
05
7
VOL
TA
G
E
(
2V/
D
IV)
VIN
VOUT
VSY = ±5V
AV = 1
RL = 10k
Figure 41. No Phase Reversal
TOTAL HARMONIC DISTORTION (THD) + NOISE
The AD8510/AD8512/AD8513 have low THD and excellent gain
linearity, making these amplifiers great choices for precision
circuits with high closed-loop gain and for audio application
circuits. Figure 42 shows that the AD8510/AD8512/AD8513 have
approximately 0.0005% of total distortion when configured in
positive unity gain (the worst case) and driving a 100 kΩ load.
FREQUENCY (Hz)
D
IS
T
OR
T
ION
(
%
)
02
72
9-
0
56
0.01
0.001
0.0001
20
100
1k
10k
20k
VSY = ±5V
RL = 100k
BW = 22kHz
Figure 42. THD + N vs. Frequency
TOTAL NOISE INCLUDING SOURCE RESISTORS
The low input current noise and input bias current of the
AD8510/AD8512/AD8513 make them the ideal amplifiers for
circuits with substantial input source resistance. Input offset
voltage increases by less than 15 nV per 500 Ω of source
resistance at room temperature. The total noise density of the
circuit is
(
)
S
n
nTOTAL
kTR
R
i
e
4
2
+
=
where:
en
is the input voltage noise density of the parts.
in
is the input current noise density of the parts.
RS
is the source resistance at the noninverting terminal.
k
is Boltzmann’s constant (1.38 × 10–23 J/K).
T
is the ambient temperature in Kelvin (T = 273 + °C).
For RS < 3.9 kΩ, en dominates and enTOTAL ≈ en. The current noise
of the AD8510/AD8512/AD8513 is so low that its total density
does not become a significant term unless RS is greater than
165 MΩ, an impractical value for most applications.
The total equivalent rms noise over a specific bandwidth is
expressed as
BW
e
nTOTAL
nTOTAL =
where BW is the bandwidth in hertz.
Note that the previous analysis is valid for frequencies larger
than 150 Hz and assumes flat noise above 10 kHz. For lower
frequencies, flicker noise (1/f) must be considered.
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| AD8512BRZ-REEL | 功能描述:IC OPAMP JFET 8MHZ DUAL LN 8SOIC 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:J-FET 电路数:2 输出类型:- 转换速率:13 V/µs 增益带宽积:3MHz -3db带宽:- 电流 - 输入偏压:65pA 电压 - 输入偏移:3000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD8512BRZ-REEL7 | 功能描述:IC OPAMP JFET 8MHZ DUAL LN 8SOIC RoHS:是 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 |
| AD8513 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational Amplifiers |
| AD8513AR | 功能描述:IC OPAMP JFET 8MHZ QUAD 14SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 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-SOIC 包装:带卷 (TR) |
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