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參數(shù)資料
| 型號(hào)： | SHC605 |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | High-Speed Operational TRACK-AND-HOLD AMPLIFIER |
| 中文描述： | 高速運(yùn)算采樣保持放大器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 200K |
| 代理商： | SHC605 |
9
SHC605
THEORY OF OPERATION
The SHC605 is a monolithic track-and-hold circuit fabri-
cated on an extremely fast complementary bipolar process.
Figure 2 provides a simplified circuit diagram of the SHC605.
A conventional two-stage operational amplifier is shown
with a standard differential phase compensation scheme
sometimes referred to as “doublet compensation.” Capaci-
tors C
1
and C
2
compensate the amplifier in the track-mode
and hold the analog output signal in the hold-mode. Switch-
ing from track to hold is achieved by turning off the
amplifier’s input stage and isolating C
1
and C
2
from the
input signal.
The differential two-stage amplifier architecture of the
SHC605 provides many performance advantages over tradi-
tional open-loop designs. The use of differential hold ca-
pacitors provides a first-order correction for many errors
including distortion, pedestal, and droop. A dominant cause
of distortion in high-speed amplifiers is the nonlinear tran-
sistor junction capacitance connected to the hold capacitor(s).
This parasitic capacitance varies as the voltage across it
changes. Most open-loop track-and-hold circuits have a
fixed gain of +1V/V, which means the hold capacitor(s) and
parasitic junction capacitance sees the full output signal
FIGURE 2. SHC605 Simplified Circuit Diagram.
swing. In the SHC605 the second gain stage attenuates the
signal across the capacitors and greatly reduces the nonlin-
ear capacitance. The SHC605’s second stage has a unity-
gain bandwidth of approximately 250MHz and its open-loop
gain rolls off at –20dB/decade. With a 2.5MHz signal, the
voltage across the hold capacitors is 100 times less than the
output signal, and therefore, the nonlinear capacitance is
greatly reduced.
The SHC605’s patented architecture provides users with an
extremely accurate high-speed
operational
track-and-hold
amplifier. All common operational amplifier transfer func-
tions can be realized with the SHC605; i.e. unity-gain, non-
inverting gain, inverting gain, and differential gain. These
configurations are shown in Figures 3 through 6. In many
instances, the SHC605 provides a superior single-chip solu-
tion to applications previously requiring two or more de-
vices. As with any conventional voltage feedback op amp, it
is important to consider tradeoffs between noise, bandwidth,
and settling time for these applications. Refer to Discussion
of Performance and Typical Performance Curves for more
details.
C
1
G = 1
V
OUT
+V
S
–V
S
–In
+In
C
2
Track/Hold
C
2
C
1
C
3
Comp
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SHC605AU | Box-shaped pin header, Discrete wire crimping connection, Discrete wire connectors; HRS No: 541-0202-1 00; No. of Positions: 4; Connector Type: Wire; Contact Gender: Female; Contact Spacing (mm): 2.5; Terminal Pitch (mm): 2.5; Termination Style: IDC/Crimping; Current Rating(Amps)(Max.): 3; Operating Temperature Range (degrees C): -35 to 85; General Description: Housing; Single row; Crimping and IDC |
| SHC615AP | Wide-Bandwidth, DC RESTORATION CIRCUIT |
| SHC615AU | Wide-Bandwidth, DC RESTORATION CIRCUIT |
| SHE113MD-B | High Efficiency LED Lamp |
| SHE114RC-(B) | High Efficiency LED Lamp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SHC605AU | 制造商:BB 制造商全稱:BB 功能描述:High-Speed Operational TRACK-AND-HOLD AMPLIFIER |
| SHC615 | 制造商:BB 制造商全稱:BB 功能描述:Wide-Bandwidth, DC RESTORATION CIRCUIT |
| SHC615AP | 制造商:BB 制造商全稱:BB 功能描述:Wide-Bandwidth, DC RESTORATION CIRCUIT |
| SHC615AU | 制造商:BURR_BROWN 功能描述: |
| SHC-62 | 功能描述:CLAMP SNAP-IT .953-1.094" RoHS:是 類別:線纜，導(dǎo)線 - 管理 >> 線夾和夾具 系列:SHC 標(biāo)準(zhǔn)包裝:100 系列:TC 類型:C-夾 開口尺寸:0.79" L x 0.54" W x 0.67" H（20.1mm x 13.7mm x 17.0mm） 安裝類型:釘子 材質(zhì):聚丙烯 顏色:黑 |
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