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參數(shù)資料
| 型號： | MAX4214 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable |
| 中文描述： | 高速、單電源、增益為+2、閉環(huán)、滿擺幅緩沖器，帶有使能端 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 215K |
| 代理商： | MAX4214 |
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Detailed Desc ription
The MAX4214/MAX4215/MAX4217/MAX4219/MAX4222
are single-supply, rail-to-rail output, voltage-feedback,
closed-loop buffers that employ current-feedback tech-
niques to achieve 600V/μs slew rates and 230MHz
bandwidths. These buffers use internal 500
resistors
to provide a preset closed-loop gain of +2V/V in the
noninverting configuration or -1V/V in the inverting con-
figuration. Excellent harmonic distortion and differential
gain/phase performance make them an ideal choice for
a wide variety of video and RF signal-processing appli-
cations.
Local feedback around the buffer’s output stage
ensures low output impedance, which reduces gain
sensitivity to load variations. This feedback also pro-
duces demand-driven current bias to the output tran-
sistors for ±120mA drive capability, while constraining
total supply current to less than 7mA.
___________Applic ations Information
Power S upplies
These devices operate from a single +3.15V to +11V
power supply or from dual supplies of ±1.575V to
±5.5V. For single-supply operation, bypass the V
CC
pin
to ground with a 0.1μF capacitor as close to the pin as
possible. If operating with dual supplies, bypass each
supply with a 0.1μF capacitor.
S elec ting Gain Configuration
Each buffer in the MAX4214 family can be configured
for a voltage gain of +2V/V or -1V/V. For a gain of
+2V/V, ground the inverting terminal. Use the noninvert-
ing terminal as the signal input of the buffer (Figure 1a).
Grounding the noninverting terminal and using the
inverting terminal as the signal input configures the
buffer for a gain of -1V/V (Figure 1b).
Since the inverting input exhibits a 500
input imped-
ance, terminate the input with a 56
resistor when con-
figured for an inverting gain in 50
applications
(terminate with 88
in 75
applications). Terminate the
input with a 49.9
resistor in the noninverting case.
Output terminating resistors should directly match
cable impedances in either configuration.
Layout T ec hniques
Maxim recommends using microstrip and stripline tech-
niques to obtain full bandwidth. To ensure the PC
board does not degrade the buffer’s performance,
design it for a frequency greater than 1GHz. Pay care-
ful attention to inputs and outputs to avoid large para-
sitic capacitance. Whether or not you use a constant-
impedance board, observe the following guidelines
when designing the board:
Don’t use wire-wrapped boards. They are too induc-
tive.
Don’t use IC sockets. They increase parasitic capac-
itance and inductance.
Use surface-mount instead of through-hole compo-
nents for better high-frequency performance.
Use a PC board with at least two layers; it should be
as free from voids as possible.
Keep signal lines as short and as straight as possi-
ble. Do not make 90° turns; round all corners.
Input V oltage Range and Output S wing
The MAX4214 family’s input range extends from
(V
EE
- 100mV) to (V
CC
- 2.25V). Input ground sensing
increases the dynamic range for single-supply applica-
tions. The outputs drive a 2k
load to within 60mV of
the power-supply rails. With smaller resistive loads, the
output swing is reduced as shown in the Electrical
Characteristics and Typical Operating Characteristics.
M
High-S peed, S ingle-S upply, Gain of +2,
Closed-Loop, Rail-to-Rail Buffers with Enable
_______________________________________________________________________________________
9
MAX42_ _
500
500
IN-
OUT
R
O
R
TO
OUT
IN
R
TIN
IN+
Figure 1a. Noninverting Gain Configuration (A
V
= +2V/V)
MAX42_ _
500
500
OUT
R
O
R
TO
OUT
R
S
R
TIN
IN+
IN-
IN
Figure 1b. Inverting Gain Configuration (A
V
= -1V/V)
相關PDF資料 |
PDF描述 |
|---|---|
| MAX4215 | High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable |
| MAX4217 | High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable |
| MAX4214EUK-T | High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable |
| MAX4222 | High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable |
| MAX4222EEE | High-Speed, Single-Supply, Gain of @, Closed-Loop, Rail-to-Rail Buffers with Enable |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4214EUK | 制造商:Maxim Integrated Products 功能描述:HIGH-SPEED SINGLE-SUPPLY GAIN OF - Rail/Tube |
| MAX4214EUK+ | 制造商:Maxim Integrated Products 功能描述:OP AMP SGL VOLT FDBK R-R O/P 5.5V/11V 5PIN SOT-23 - Bulk |
| MAX4214EUK+T | 功能描述:高速運算放大器 Closed-Loop Rail-Rail Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4214EUK-T | 功能描述:高速運算放大器 Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4215ESA | 功能描述:高速運算放大器 Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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