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參數資料
| 型號： | OPA4684ID |
| 元件分類： | 運動控制電子 |
| 英文描述： | Quad, Low-Power, Current-Feedback OPERATIONAL AMPLIFIER |
| 中文描述： | 四，低功耗，電流反饋運算放大器 |
| 文件頁數： | 1/26頁 |
| 文件大小： | 455K |
| 代理商： | OPA4684ID |
OPA4684
OPA4684
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
OPA4684
www.ti.com
Copyright 2002, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SBOS240B – JUNE 2002 – REVISED AUGUST 2002
Quad, Low-Power, Current-Feedback
OPERATIONAL AMPLIFIER
FEATURES
G
MINIMAL BANDWIDTH CHANGE VERSUS GAIN
G
170MHz BANDWIDTH AT G = +2
G
> 120MHz BANDWIDTH TO GAIN > +10
G
LOW DISTORTION: < –78dBc at 5MHz
G
HIGH OUTPUT CURRENT: 120mA
G
SINGLE +5V TO +12V SUPPLY OPERATION
G
DUAL
±
2.5 TO
±
6.0V SUPPLY OPERATION
G
LOW SUPPLY CURRENT: 6.8mA Total
DESCRIPTION
The OPA4684 provides a new level of performance in low-
power, wideband, current-feedback (CFB) amplifiers. This
CFB
PLUS
amplifier is among the first to use an internally
closed-loop input buffer stage that enhances performance
significantly over earlier low-power CFB amplifiers. While
retaining the benefits of very low power operation, this new
architecture provides many of the benefits of a more ideal
CFB amplifier. The closed-loop input stage buffer gives a
very low and linearized impedance path at the inverting input
to sense the feedback error current. This improved inverting
input impedance retains exceptional bandwidth to much
higher gains and improves harmonic distortion over earlier
solutions limited by inverting input linearity. Beyond simple
high-gain applications, the OPA4684 CFB
PLUS
amplifier per-
mits the gain setting element to be set with considerable
APPLICATIONS
G
LOW-POWER BROADCAST VIDEO DRIVERS
G
EQUALIZING FILTERS
G
SAW FILTER HIGH-GAIN POST AMPLIFIERS
G
MULTICHANNEL SUMMING AMPLIFIERS
G
WIDEBAND DIFFERENTIAL CHANNELS
G
ANALOG-TO-DIGITAL CONVERTERS (ADC)
INPUT DRIVERS
G
MULTIPLE POLE ACTIVE FILTERS
G
OPA4658 LOW-POWER UPGRADE
freedom from amplifier bandwidth interaction. This allows
frequency response peaking elements to be added, multiple
input inverting summing circuits to have greater bandwidth,
and low-power line drivers to meet the demanding require-
ments of studio cameras and broadcast video.
The output capability of the OPA4684 also sets a new mark
in performance for low-power current-feedback amplifiers.
Delivering a full
±
4Vp-p swing on
±
5V supplies, the OPA4684
also has the output current to support >
±
3V swing into 50
.
This minimal output headroom requirement is complemented
by a similar 1.2V input stage headroom giving exceptional
capability for single +5V operation.
The OPA4684
’
s low 6.8mA supply current is precisely trimmed
at 25
°
C. This trim, along with low shift over temperature and
supply voltage, gives a very robust design over a wide range
of operating conditions.
Patent Pending
V+
V
O
V
–
I
ERR
R
G
R
F
Z
(S)
I
ERR
+
Low-Power
Amplifier
1 of 4 Channels
6
3
0
–
3
–
6
–
9
–
12
–
15
–
18
–
21
–
24
N
R
F
= 800
10
G = 100
G = 50
G = 20
G = 10
G = 2
G = 1
100
200
BW (MHz) vs GAIN
G = 5
MHz
相關PDF資料 |
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|---|---|
| OPA4684 | Wideband, Low-Power, Current Feedback Operational Amplifier |
| OPA4684IPWR | Quad, Low-Power, Current-Feedback OPERATIONAL AMPLIFIER |
| OPA4684IPWT | Quad, Low-Power, Current-Feedback OPERATIONAL AMPLIFIER |
| OPA4684IDR | Quad, Low-Power, Current-Feedback OPERATIONAL AMPLIFIER |
| OPA4705 | Low-Cost, CMOS, Rail-to-Rail, I/O OPERATIONAL AMPLIFIERS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| OPA4684IDBW | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUAD LOW-POWER CURRENT-FEEDBACK OPERATIONAL AMPLIFIER |
| OPA4684IDG4 | 功能描述:高速運算放大器 Quad Low-Power Current Feedback RoHS:否 制造商:Texas Instruments 通道數量: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 |
| OPA4684IDR | 功能描述:高速運算放大器 Quad Low-Power Current Feedback RoHS:否 制造商:Texas Instruments 通道數量: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 |
| OPA4684IDRG4 | 功能描述:高速運算放大器 Quad Low-Power Current Feedback RoHS:否 制造商:Texas Instruments 通道數量: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 |
| OPA4684IPWR | 功能描述:高速運算放大器 Quad Low-Power Current Feedback RoHS:否 制造商:Texas Instruments 通道數量: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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