参数资料
| 型号： | AD8608ARUZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R CMOS 14TSSOP |
| 标准包装： | 2,500 |
| 系列： | DigiTrim® |
| 放大器类型： | 通用 |
| 电路数： | 4 |
| 输出类型： | 满摆幅 |
| 转换速率： | 5 V/µs |
| 增益带宽积： | 10MHz |
| 电流 - 输入偏压： | 0.2pA |
| 电压 - 输入偏移： | 80µV |
| 电流 - 电源： | 1mA |
| 电流 - 输出 / 通道： | 80mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°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) |
Data Sheet
AD8605/AD8606/AD8608
Rev. N | Page 17 of 24
TOTAL NOISE INCLUDING SOURCE RESISTORS
The low input current noise and input bias current of the
AD860x make it the ideal amplifier for circuits with substantial
input source resistance, such as photodiodes. Input offset voltage
increases by less than 0.5 nV per 1 k of source resistance at
room temperature and increases to 10 nV at 85°C. The total
noise density of the circuit is
( )
S
n
TOTAL
n
TR
k
R
i
e
4
2
,
+
=
where:
en is the input voltage noise density of the AD860x.
in is the input current noise density of the AD860x.
RS is the source resistance at the noninverting terminal.
k is Boltzmann’s constant (1.38 × 1023 J/K).
T is the ambient temperature in Kelvin (T = 273 + °C).
For example, with RS = 10 k, the total voltage noise density is
roughly 15 nV/√Hz.
For RS < 3.9 k, en dominates and en,TOTAL ≈ en.
The current noise of the AD860x is so low that its total density
does not become a significant term unless RS is greater than 6 M.
The total equivalent rms noise over a specific bandwidth is
expressed as
(
) BW
e
E
TOTAL
n
,
=
where BW is the bandwidth in hertz.
Note that the previous analysis is valid for frequencies greater
than 100 Hz and assumes relatively flat noise, above 10 kHz. For
lower frequencies, flicker noise (1/f) must be considered.
CHANNEL SEPARATION
Channel separation, or inverse crosstalk, is a measure of the signal
feed from one amplifier (channel) to another on the same IC.
The AD8606 has a channel separation of greater than 160 dB
up to frequencies of 1 MHz, allowing the two amplifiers to
amplify ac signals independently in most applications.
CAPACITIVE LOAD DRIVE
The AD860x can drive large capacitive loads without oscillation.
Figure 48 shows the output of the AD8606 in response to a
200 mV input signal. In this case, the amplifier is configured
in positive unity gain, worst case for stability, while driving a
1000 pF load at its output. Driving larger capacitive loads in
unity gain can require the use of additional circuitry.
A snubber network, shown in Figure 49, helps reduce the signal
overshoot to a minimum and maintain stability. Although this
circuit does not recover the loss of bandwidth induced by large
capacitive loads, it greatly reduces the overshoot and ringing.
This method does not reduce the maximum output swing of the
amplifier.
CHANNE
L
SE
P
AR
A
TION
(
dB
)
FREQUENCY (Hz)
10M
1M
100k
10k
1k
100
100M
–20
0
–40
–60
–80
–100
–120
–140
–160
–180
02731-
046
Figure 47. Channel Separation vs. Frequency
TIME (10s/DIV)
VO
L
T
AG
E
(
100mV
/DI
V
)
02731-
047
VS = ±2.5V
AV = 1
RL = 10k
CL = 1000pF
Figure 48. AD8606 Capacitive Load Drive Without Snubber
RS
CS
RL
CL
V+
V–
4
2
3
8
1
AD8605
VIN
200mV
02731-
049
Figure 49. Snubber Network Configuration
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| AD8608ARZ | 功能描述:IC OPAMP GP R-R CMOS QUAD 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 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 |
| AD8608ARZ-REEL | 功能描述:IC OPAMP GP R-R CMOS QUAD 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| AD8608ARZ-REEL7 | 功能描述:IC OPAMP GP R-R CMOS QUAD 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| AD8609 | 制造商:AD 制造商全称:Analog Devices 功能描述:22 μA, RRIO, CMOS, 18 V |
| AD8609AR | 制造商:Analog Devices 功能描述:OP Amp Quad GP R-R I/O ±2.5V/5V 14-Pin SOIC N 制造商:Analog Devices 功能描述:OP AMP QUAD PRECISION RRI/O 8609 |
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