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| BA6845FS-E2资料 | |
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BA6845FS-E2 PDF Download |
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File Size : 116 KB
Manufacturer:ROHM Description:The noise of Q1A and Q1B would normally be quite signifi- cant about 6 nV 0Hz but the 10 mF capacitors completely filter out the noise At all frequencies above 10 Hz Q2A and Q2B act as the input transistors while Q1A and Q1B merely buffer the lowest frequency and DC signals For audio frequencies (20 Hz to 20 kHz) the voltage noise of this amplifier is predicted to be 1 4 nV 0Hz which is quite small compared to the Johnson noise of the 1 kX source 4 0 nV 0Hz A noise figure of 0 7 dB is thus predicted and has been measured and confirmed Note that for best DC balance R6 e 976X is added into the feedback path so that the total impedance seen by the op amp at its negative input is 1 kX But the 976X is heavily bypassed and the total Johnson noise contributed by the feedback network is belownV 0Hz To achieve lowest drift below 0 1 mV C R1 and R2 should of course be chosen to have good tracking tempco below 5 ppm C and so should R3 and R4 When this is done the drift referred to input will be well below 0 5 mV C and this has been confirmed in the range a 10 C to a 50 C Overall we have designed a low-noise op amp which can rival the noise of the best audio amplifiers and at the same |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：BA6845FS-E2 厂 家：ROHM 封 装：SSOP16 批 号：08+ 数 量：1430 说 明：本公司价格合理，质量保证，全部料号均保证厂家原装正品! |
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运 费： 所在地： 新旧程度： |
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| 联系人：丛先生、马小姐 |
| 电 话：010-82638693，62571319 |
| 手 机：13718657300 |
| QQ：200657300 |
| MSN：zweililong168@hotmail.com |
| 传 真：010-62573370 |
| EMail：200657300@qq.com |
| 公司地址： 北京市海淀区知春路108号豪景大厦B座1101室 |
