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| 型号： | ADA4075-2ARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 6.5MHZ DUAL LN 8SOIC |
| 标准包装： | 98 |
| 系列： | iPolar® |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 转换速率： | 12 V/µs |
| 增益带宽积： | 6.5MHz |
| 电流 - 输入偏压： | 30nA |
| 电压 - 输入偏移： | 200µV |
| 电流 - 电源： | 1.8mA |
| 电流 - 输出 / 通道： | 40mA |
| 电压 - 电源，单路/双路(±)： | ±4.5 V ~ 18 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
| 产品目录页面： | 768 (CN2011-ZH PDF) |
ADA4075-2
Data Sheet
Rev. C | Page 18 of 24
BALANCED LINE DRIVER
The circuit of Figure 67 shows a balanced line driver designed
for audio use. Such drivers are intended to mimic an output
transformer in operation, whereby the common-mode voltage
can be impressed by the load. Furthermore, either output can be
shorted to ground in single-ended applications without affecting
the overall operation.
Circuits of this type use positive and negative feedback to obtain a
high common-mode output impedance, and they are somewhat
notorious for component sensitivity and susceptibility to latch-up.
This circuit uses several techniques to avoid spurious behavior.
First, the 4-op-amp arrangement ensures that the input impedance
is load independent (the input impedance can become negative
with some configurations). Note that the output op amps are
packaged with the input op amps to maximize drive capability.
Second, the positive feedback is ac-coupled by C2 and C3, which
eliminates the need for offset trim. Because the circuit is ac-coupled
at the input, these capacitors do not have significant dc voltage
across them, thus tantalum types of capacitors can be used.
Finally, even with these precautions, it is vital that the positive
feedback be accurately controlled. This is partly achieved by
using 1% resistors. In addition, the following setup procedure
ensures that the positive feedback does not become excessive:
1. Set R11 to its midposition (or short the ends together,
whichever is easier) and temporarily short the negative
output to ground.
2. Apply a 10 V p-p sine wave at approximately 1 kHz to the
input and adjust R7 to provide 930 mV p-p at TEST (see
3. Remove the short from the negative output (and across
R11, if used) and adjust R11 until the output waveforms
are symmetric.
The overall gain of the driver is equal to 2, which provides an
extra 6 dB of headroom in balanced differential mode. The
output noise is about 109 dBV in a 20 kHz bandwidth.
07642-
073
C3
10F
R2
4.7k
OUT+
OUT–
1/2
ADA4075-2
R5
4.7k
R6
4.7k
R7
250
R8
100
R9
4.7k
R13
100
R4
4.7k
A2
1/2
ADA4075-2
A1
IN
C5
50pF
C1
10F
C2
10F
TEST
SYMMETRY
TRIM
FEEDBACK
TRIM
1/2
ADA4075-2
R12
4.7k
R11
250
R17
4.7k
R16
100
R10
4.7k
R15
4.7k
A4
C6
50pF
1/2
ADA4075-2
A3
C4
50pF
R14
100
R1
10k
NOTES
1. ALL RESISTORS SHOULD HAVE 1% TOLERANCE.
2. A1/A2 IN SAME PACKAGE; A3/A4 IN SAME PACKAGE.
R3
4.7k
R18
4.7k
Figure 67. Balanced Line Driver
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4075-2ARZ | 制造商:Analog Devices 功能描述:IC, OP-AMP, 6.5MHZ, 12V/ us, SOIC-8 |
| ADA4075-2ARZ-R7 | 功能描述:IC OPAMP GP 6.5MHZ DUAL LN 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:iPolar® 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
| ADA4075-2ARZ-RL | 功能描述:IC OPAMP GP 6.5MHZ DUAL LN 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:iPolar® 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
| ADA4077-1ARMZ | 功能描述:General Purpose Amplifier 1 Circuit 8-MSOP 制造商:analog devices inc. 系列:- 包装:管件 零件状态:有效 放大器类型:通用 电路数:1 输出类型:- 压摆率:1.2 V/μs 增益带宽积:3.6MHz -3db 带宽:- 电流 - 输入偏置:1nA 电压 - 输入失调:10μV 电流 - 电源:400μA 电流 - 输出/通道:22mA 电压 - 电源，单/双（±）:±2.5 V ~ 15 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商器件封装:8-MSOP 标准包装:50 |
| ADA4077-1ARMZ-R7 | 功能描述:General Purpose Amplifier 1 Circuit 8-MSOP 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:有效 放大器类型:通用 电路数:1 输出类型:- 压摆率:1.2 V/μs 增益带宽积:3.6MHz -3db 带宽:- 电流 - 输入偏置:1nA 电压 - 输入失调:10μV 电流 - 电源:400μA 电流 - 输出/通道:22mA 电压 - 电源，单/双（±）:±2.5 V ~ 15 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商器件封装:8-MSOP 标准包装:1,000 |
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