參數(shù)資料
型號(hào): MAX4222EEE+T
廠商: Maxim Integrated Products
文件頁數(shù): 16/16頁
文件大?。?/td> 0K
描述: IC BUFFER R-R W/ENABLE 16QSOP
標(biāo)準(zhǔn)包裝: 2,500
放大器類型: 緩沖器
電路數(shù): 4
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 600 V/µs
-3db帶寬: 200MHz
電流 - 輸入偏壓: 5.4µA
電壓 - 輸入偏移: 4000µV
電流 - 電源: 5.5mA
電流 - 輸出 / 通道: 120mA
電壓 - 電源,單路/雙路(±): 3.15 V ~ 11 V,±1.575 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-QSOP
包裝: 帶卷 (TR)
________________ Detailed Description
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/s slew rates and 230MHz
bandwidths. These buffers use internal 500
resistors
to provide a preset closed-loop gain of 2V/V in the non-
inverting configuration or -1V/V in the inverting configu-
ration. 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.
___________Applications Information
Power Supplies
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 VCC pin
to ground with a 0.1F capacitor as close to the pin as
possible. If operating with dual supplies, bypass each
supply with a 0.1F capacitor.
Selecting 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 noninverting ter-
minal 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 Techniques
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 Voltage Range and Output Swing
The MAX4214 family’s input range extends from
(VEE - 100mV) to (VCC - 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.
MAX4214/MAX4215/MAX4217/MAX4219/MAX4222
High-Speed, Single-Supply, Gain of 2,
Closed-Loop, Rail-to-Rail Buffers with Enable
_______________________________________________________________________________________
9
MAX42_ _
500
500
IN-
OUT
RO
RTO
OUT
IN
RTIN
IN+
Figure 1a. Noninverting Gain Configuration (AV = +2V/V)
MAX42_ _
500
500
OUT
RO
RTO
OUT
RS
RTIN
IN+
IN-
IN
Figure 1b. Inverting Gain Configuration (AV = -1V/V)
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MAX4222ESD+ 功能描述:高速運(yùn)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(bǔ)償電壓:0.5 mV 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MAX4222ESD+T 功能描述:高速運(yùn)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(bǔ)償電壓:0.5 mV 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
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