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参数资料
| 型号： | EL2126CW-T13 |
| 英文描述： | 3.3 Volt Ringing SLIC Family for Voice Over Broadband (VOB); Temperature Range: 0°C to 70°C; Package: 32-QFN |
| 中文描述： | 放大器。其他 |
| 文件页数： | 6/16页 |
| 文件大小： | 408K |
| 代理商： | EL2126CW-T13 |
14
EL2126C
Ultra-Low Noise, Low Power, Wideband Amplifier
E
L
2126C
Applications Information
Product Description
The EL2126C is an ultra-low noise, wideband mono-
lithic operational amplifier built on Elantec's proprietary
high speed complementary bipolar process. It features
1.3nV/
√Hz input voltage noise, 200V typical offset
voltage, and 73dB THD. It is intended for use in systems
such as ultrasound imaging where very small signals are
needed to be amplified. The EL2126C also has excellent
DC specifications: 200V VOS, 22A IB, 0.4A IOS,
and 106dB CMRR. These specifications allow the
EL2126C to be used in DC-sensitive applications such
as difference amplifiers.
Gain-Bandwidth Product
The EL2126C has a gain-bandwidth product of 650MHz
at ±5V. For gains less than 20, higher-order poles in the
amplifier's transfer function contribute to even higher
closed-loop bandwidths. For example, the EL2126C has
a -3dB bandwidth of 100MHz at a gain of 10 and
decreases to 33MHz at gain of 20. It is important to note
that the extra bandwidth at lower gain does not come at
the expenses of stability. Even though the EL2126C is
designed for gain
≥ 10. With external compensation, the
device can also operate at lower gain settings. The RC
network shown in Figure 1 reduces the feedback gain at
high frequency and thus maintains the amplifier stabil-
ity. R values must be less than RF divided by 9 and 1
divided by 2
πRC must be less than 200MHz.
Choice of Feedback Resistor, RF
The feedback resistor forms a pole with the input capac-
itance. As this pole becomes larger, phase margin is
reduced. This increases ringing in the time domain and
peaking in the frequency domain. Therefore, RF has
some maximum value which should not be exceeded for
optimum performance. If a large value of RF must be
used, a small capacitor in the few pF range in parallel
with RF can help to reduce this ringing and peaking at
the expense of reducing the bandwidth. Frequency
response curves for various RF values are shown in the
typical performance curves section of this data sheet.
Noise Calculations
The primary application for the EL2126C is to amplify
very small signals. To maintain the proper signal-to-
noise ratio, it is essential to minimize noise contribution
from the amplifier. Figure 2 below shows all the noise
sources for all the components around the amplifier.
VN is the amplifier input voltage noise
IN+ is the amplifier positive input current noise
IN- is the amplifier negative input current noise
VRX is the thermal noise associated with each resistor:
where:
- k is Boltzmann's constant = 1.380658 x 10-23
- T is temperature in degrees Kelvin (273+ °C)
-
+
RF
R
C
VIN
VOUT
Figure 1.
-
+
VON
VIN
IN+
IN-
R2
R3
R1
VN
VR3
VR2
VR1
Figure 2.
V
RX
4kTRx
=
相关PDF资料 |
PDF描述 |
|---|---|
| EL2125CW-T13 | 3.3 Volt Ringing SLIC Family for Voice Over Broadband (VOB); Temperature Range: 0°C to 70°C; Package: 28-PLCC |
| EL2140C | 150 MHz High Bandwidth Amplifier （Differential Twisted Pair Driver）(150 MHz宽带放大器（差分双绞线驱动器）) |
| EL2140 | 150 MHz Differential Twisted Pair Driver |
| EL2140CN | 150 MHz Differential Twisted Pair Driver |
| EL2140CS | 150 MHz Differential Twisted Pair Driver |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL2126CW-T7 | 功能描述:IC AMP ULT LO NOISE/PWR SOT23-5 RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:2pA 电压 - 输入偏移:1000µV 电流 - 电源:85µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):1.8 V ~ 6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:剪切带 (CT) 产品目录页面:680 (CN2011-ZH PDF) 其它名称:MCP6L04T-E/SLCT |
| EL2126CW-T7A | 功能描述:IC AMP ULT LO NOISE/PWR SOT23-5 RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:2pA 电压 - 输入偏移:1000µV 电流 - 电源:85µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):1.8 V ~ 6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:剪切带 (CT) 产品目录页面:680 (CN2011-ZH PDF) 其它名称:MCP6L04T-E/SLCT |
| EL2126CWZ-T7 | 功能描述:高速运算放大器 EL2126CWZ LW NOISE CVR A=10 RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| EL2126CWZ-T7A | 功能描述:高速运算放大器 EL2126CWZ LW NOISE CVR A=10 RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| EL21278 PC93 | 制造商:YARWAY 功能描述: |
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