Datasheet LT1677 (Analog Devices) - 20
| 制造商 | Analog Devices |
| 描述 | Low Noise, Rail-to-Rail Precision Op Amp |
| 页数 / 页 | 20 / 20 — TYPICAL APPLICATIO. 2-Wire Remote Geophone Preamp. RELATED PARTS. PART … |
| 文件格式/大小 | PDF / 561 Kb |
| 文件语言 | 英语 |
TYPICAL APPLICATIO. 2-Wire Remote Geophone Preamp. RELATED PARTS. PART NUMBER. DESCRIPTION. COMMENTS
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LT1677
U TYPICAL APPLICATIO
This 2-wire remote Geophone preamp operates on a gain of ~107. Components R5 and Q1 convert the voltage current-loop principle and so has good noise immunity. into a current for transmission back to R10, which con- Quiescent current is ≈10mA for a VOUT of 2.5V. Excitation verts it into a voltage again. The LM334 and 2N3904 are will cause AC currents about this point of ~±4mA for a not temperature compensated so the DC output contains VOUT of ~±1V max. The op amp is configured for a voltage temperature information.
2-Wire Remote Geophone Preamp
R9 20Ω LINEAR V + TECHNOLOGY R LM334Z R8 6mA V – 11Ω Q1 12V 3V R2 2N3904 R6 C R4 100k 4.99k + R LT1431CZ C3 14k 220µF A R7 R5 R1 V 24.9k 243Ω OUT 365Ω 2 – C2 2.5V ±1V 7 R10 GEOSPACE – 0.1µF 250Ω 6 GS-20DX LT1677 RL = 630Ω + 3 + GEOPHONE 4 www.geospacecorp.com/default.htm R3 C4 (713) 939-7093 16.2k 1000pF 1677 TA04 A R2 + R3||R4 V = ≅ 107 R1 + RL
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT1028/LT1128 Ultralow Noise Precision Op Amps Lowest Noise 0.85nV/√Hz LT1115 Ultralow Noise, Low distortion Audio Op Amp 0.002% THD, Max Noise 1.2nV/√Hz LT1124/LT1125 Dual/Quad Low Noise, High Speed Precision Op Amps Similar to LT1007 LT1126/LT1127 Dual/Quad Decompensated Low Noise, High Speed Precision Op Amps Similar to LT1037 LT1226 Low Noise, Very High Speed Op Amp 1GHz, 2.6nV/√Hz, Gain of 25 Stable LT1498/LT1499 10MHz, 5V/µs, Dual/Quad Rail-to-Rail Input and Output Op Amps Precision C-LoadTM Stable LT1792 Low Noise, Precision JFET Input Op Amp 4.2nV/√Hz, 10fA/√Hz LT1793 Low Noise, Picoampere Bias Current Op Amp 6nV/√Hz, 1fA/√Hz, IB = 10pA Max LT1806 Low Noise, 325MHz Rail-to-Rail Input and Output Op Amp 3.5nV/√Hz LT1881/LT1882 Dual/Quad Rail-to-Rail Output Picoamp Input Precision Op Amps CLOAD to 1000pF, IB = 200pA Max LT1884/LT1885 Dual/Quad Rail-to-Rail Output Picoamp Input Precision Op Amps 2.2MHz Bandwidth, 1.2V/µs SR C-Load is a trademark of Linear Technology Corporation. 1677fa LT 0306 REV A • PRINTED IN USA 20 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com © LINEAR TECHNOLOGY CORPORATION 2000
U TYPICAL APPLICATIO
This 2-wire remote Geophone preamp operates on a gain of ~107. Components R5 and Q1 convert the voltage current-loop principle and so has good noise immunity. into a current for transmission back to R10, which con- Quiescent current is ≈10mA for a VOUT of 2.5V. Excitation verts it into a voltage again. The LM334 and 2N3904 are will cause AC currents about this point of ~±4mA for a not temperature compensated so the DC output contains VOUT of ~±1V max. The op amp is configured for a voltage temperature information.
2-Wire Remote Geophone Preamp
R9 20Ω LINEAR V + TECHNOLOGY R LM334Z R8 6mA V – 11Ω Q1 12V 3V R2 2N3904 R6 C R4 100k 4.99k + R LT1431CZ C3 14k 220µF A R7 R5 R1 V 24.9k 243Ω OUT 365Ω 2 – C2 2.5V ±1V 7 R10 GEOSPACE – 0.1µF 250Ω 6 GS-20DX LT1677 RL = 630Ω + 3 + GEOPHONE 4 www.geospacecorp.com/default.htm R3 C4 (713) 939-7093 16.2k 1000pF 1677 TA04 A R2 + R3||R4 V = ≅ 107 R1 + RL
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT1028/LT1128 Ultralow Noise Precision Op Amps Lowest Noise 0.85nV/√Hz LT1115 Ultralow Noise, Low distortion Audio Op Amp 0.002% THD, Max Noise 1.2nV/√Hz LT1124/LT1125 Dual/Quad Low Noise, High Speed Precision Op Amps Similar to LT1007 LT1126/LT1127 Dual/Quad Decompensated Low Noise, High Speed Precision Op Amps Similar to LT1037 LT1226 Low Noise, Very High Speed Op Amp 1GHz, 2.6nV/√Hz, Gain of 25 Stable LT1498/LT1499 10MHz, 5V/µs, Dual/Quad Rail-to-Rail Input and Output Op Amps Precision C-LoadTM Stable LT1792 Low Noise, Precision JFET Input Op Amp 4.2nV/√Hz, 10fA/√Hz LT1793 Low Noise, Picoampere Bias Current Op Amp 6nV/√Hz, 1fA/√Hz, IB = 10pA Max LT1806 Low Noise, 325MHz Rail-to-Rail Input and Output Op Amp 3.5nV/√Hz LT1881/LT1882 Dual/Quad Rail-to-Rail Output Picoamp Input Precision Op Amps CLOAD to 1000pF, IB = 200pA Max LT1884/LT1885 Dual/Quad Rail-to-Rail Output Picoamp Input Precision Op Amps 2.2MHz Bandwidth, 1.2V/µs SR C-Load is a trademark of Linear Technology Corporation. 1677fa LT 0306 REV A • PRINTED IN USA 20 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com © LINEAR TECHNOLOGY CORPORATION 2000