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| 型號： | AD8011AR |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/17頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP CF LP LDIST 30MA 8SOIC |
| 標準包裝： | 98 |
| 放大器類型： | 電流反饋 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 3500 V/µs |
| -3db帶寬： | 400MHz |
| 電流 - 輸入偏壓： | 5µA |
| 電壓 - 輸入偏移： | 2000µV |
| 電流 - 電源： | 1.3mA |
| 電流 - 輸出 / 通道： | 30mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 12 V，±1.5 V ~ 6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 管件 |
REV. C
AD8011
–11–
1E+03
1E+04
1E+05
1E+06
1E+07
1E+08
1E+09
FREQUENCY (Hz)
140
120
100
80
60
20
0
40
GAIN
(dB
)
0
PHASE
(Degrees)
–40
–80
–120
–160
–200
–240
–280
PHASE
GAIN
TO(s)
Figure 9. Open-Loop Transimpedance Gain
Note that the ac open-loop plots in Figures 8, 9, and 10 are based
on the full SPICE AD8011 simulations and do not include
external parasitics (see equations below). Nevertheless, these ac
loop equations still provide a good approximation to simulated
and actual performance up to the CLBW of the amplifier. Typi-
cally, gmc
R1 is –4, resulting in AO(s) having a right half plane
pole. In the time domain (inverse Laplace of AO), it appears as
unstable, causing VO to exponentially rail out of its linear region.
When the loop is closed however, the BW is greatly extended and
the transimpedance gain, TO (s), overrides and directly controls
the amplifiers stability behavior due to ZI approaching 1/2 gmf
for s>>1/
τ1 (see Figure 10). This can be seen by the Z
I (s) and
AV (s) noninverting transfer equations below.
Zs
g
mc
R
S
g
mc
R
g
mf
S
I ()
( –
)
–
()
=
×
+
×+
11
1
11
1
21 1
τ
As
G
A
R
T
S
G
g
mf
T
R
T
V
O
F
OO
F
O
()
=
++
+
+
11
2
1
τ
1E+03
1E+04
1E+05
1E+06
1E+07
1E+08
1E+09
400
370
340
310
280
220
190
FREQUENCY (Hz)
250
RESISTANCE
(
)
20
PHASE
(Degrees)
0
–20
–40
–120
160
130
100
–140
–160
–180
–60
–80
–100
SERIES 1
IMPEDANCE
ZI(s)
SERIES 2
PHASE
Figure 10. Open-Loop Inverting Input Impedance
ZI (s) goes positive real and approaches 1/2 gmf as
approaches
(gmc R1 – 1)/
τ1. This results in the input resistance for the A
V (s)
complex term being 1/2 gmf, the parallel thermal emitter
resistances of Q3/Q4. Using the computed CLBW from AV (s)
and the nominal design values for the other parameters, results in
a closed-loop 3 dB BW equal to the open-loop corner frequency
(1/2
πτ1) × 1/[G/(2 gmf
TO) + RF/TO]. For a fixed RF, the
3 dB BW is controlled by the RF/TO term for low gains and
G/(2 gmf
TO) for high gains. For example, using nominal design
parameters and R1 = 1 k
(which results in a nominal TO of
1.2 M
), the computed BW is 80 MHz for G = 0 (inverting
I-V mode with RN removed) and 40 MHz for G = +10/–9.
DRIVING CAPACITIVE LOADS
The AD8011 was designed primarily to drive nonreactive loads.
If driving loads with a capacitive component is desired, the best
settling response is obtained by the addition of a small series
resistance as shown in Figure 11. The accompanying graph shows
the optimum value for RSERIES versus capacitive load. It is worth
noting that the frequency response of the circuit when driving
large capacitive loads will be dominated by the passive roll-off
of RSERIES and CL.
1k
RL
1k
CL
RSERIES
1k
AD8011
Figure 11. Driving Capacitive Load
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| AD8011AR-EBZ | 功能描述:BOARD EVAL FOR AD8011AR RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| AD8011AR-REEL | 制造商:Analog Devices 功能描述:OP Amp Single Current Fdbk ±6V/12V 8-Pin SOIC N T/R |
| AD8011AR-REEL7 | 功能描述:IC OPAMP CF LP LDIST 30MA 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
| AD8011ARZ | 功能描述:IC OPAMP CF LP LDIST 30MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD8011ARZ | 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, 300MHZ, 3500V/ us, SOIC-8 |
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