LT1007CH - Low-Noise Precision Op Amp | Analog Devices
MPN： LT1007CH ✓ 啟用中LT1007CH 概覽
直接替換替代品，適用於 LT1007CH — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品LT1007CH 最大額定值與電氣特性
| Amplifier Type | Single low-noise, high-speed precision operational amplifier |
| Circuit Count | 1 circuit |
| Wideband Input Noise | 2.5 nV/√Hz |
| Guaranteed Noise at 10 Hz | 4.5 nV/√Hz |
| Guaranteed Noise at 1 kHz | 3.8 nV/√Hz |
| Low-Frequency Peak-to-Peak Noise | 60 nV peak-to-peak from 0.1 Hz to 10 Hz |
| 1/f Corner Frequency | 2 Hz |
| Input Offset Voltage | 10 µV |
| Input Offset Voltage Drift | 0.2 µV/°C |
| Common-Mode Rejection | 130 dB |
| Power-Supply Rejection | 130 dB |
| 封裝 | TO-5 |
| 安裝類型 | Through-hole |
LT1007CH to-5 腳位配置指南
LT1007CH（to-5 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LT1007CH.
請參閱 資料表 以查看完整腳位配置。
典型應用
LT1007CH 適用於 6 應用s: Precision Sensor Instrumentation, Low-Noise Signal Conditioning, Low-Level Bridge and Strain Measurements, Audio and Microphone Preamplification, Medical and Laboratory Measurement, High-Resolution Analog Measurement.
Precision Sensor Instrumentation
The LT1007CH is suitable for amplifying low-level sensor outputs where input-referred noise, offset error, and drift set the measurement floor. Its 2.5 nV/√Hz wideband noise, guaranteed 4.5 nV/√Hz at 10 Hz, and 10 µV offset voltage are valuable when the signal source resistance is high enough for amplifier noise to dominate. The 130 dB common-mode and power-supply rejection figures also help suppress coupled disturbances. Use the device in a grounded, temperature-stable layout, keep the two input leads adjacent, and verify the actual common-mode and output-swing limits from the manufacturer datasheet.
Low-Noise Signal Conditioning
The LT1007CH can condition small analog signals whose information content lies close to the amplifier noise floor. With 3.8 nV/√Hz guaranteed noise at 1 kHz and typical 60 nV peak-to-peak noise from 0.1 Hz to 10 Hz, the part is appropriate for precision gain stages ahead of measurement or conversion. The 10 µV offset and 0.2 µV/°C drift must be included in the system error budget, especially across changing ambient temperatures. Short input traces, symmetrical input routing, clean grounding, and supply bypassing are essential because board leakage and thermal gradients can otherwise negate the device’s exceptional low-frequency noise performance.
Low-Level Bridge and Strain Measurements
The LT1007CH fits bridge and strain-gauge front ends that require low voltage noise and excellent DC rejection. The 130 dB common-mode rejection is especially relevant when the bridge is excited by a supply and its small differential output is superimposed on a larger common-mode voltage. The LT1007’s 2.5 nV/√Hz wideband noise limits amplifier-added noise, while its 0.2 µV/°C drift contributes to total measurement uncertainty. Actual bridge excitation, gain, resistor matching, input bias current, and supply operating range must be verified because the supplied data does not quantify those design limits.
Audio and Microphone Preamplification
The LT1007CH can serve as a very-low-noise preamplifier for high-impedance microphones, pickups, and other audio sources. Its wideband noise of 2.5 nV/√Hz is below the thermal noise associated with a 400 Ω resistor, while the typical 60 nV peak-to-peak 0.1 Hz-to-10 Hz figure supports low-frequency audio work. The tradeoff is that the verified material does not provide the LT1007CH bandwidth, output drive, or common-mode limits, and the TO-5 package offers limited bandwidth relative to modern surface-mount alternatives. Confirm those parameters and use short, shielded input routing before using it in a new audio design.
Medical and Laboratory Measurement
The LT1007CH is applicable to laboratory and medical instrumentation when very small signals must be measured with low added noise. The combination of 2.5 nV/√Hz wideband noise, 10 µV offset voltage, 0.2 µV/°C drift, and 130 dB rejection allows the amplifier to preserve signals close to the source noise floor. For medical equipment, system-level safety, isolation, leakage, and qualification requirements remain separate from the op amp specifications. The verified data does not state whether this exact ordering option is AEC-Q100 qualified or medical-grade certified, so compliance must be confirmed from the current manufacturer product documentation.
High-Resolution Analog Measurement
The LT1007CH is useful as the amplifier immediately preceding a high-resolution ADC when the analog input is small and source impedance is relatively high. Low amplifier noise prevents the front end from masking the converter’s useful resolution, while 130 dB power-supply rejection can reduce sensitivity to supply ripple. The 10 µV offset and 0.2 µV/°C drift should be included in a calibration and temperature-error budget. Designers must also confirm that the signal bandwidth, settling behavior, and output range of the LT1007CH support the intended ADC acquisition time, because those values are not present in the supplied search excerpts.
工程參考資料，適用於 LT1007CH — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | TO-5 |
| Brand | Analog Devices |
| Wideband Input Noise | 2.5 nV/√Hz |
| Guaranteed Noise at 10 Hz | 4.5 nV/√Hz |
| Guaranteed Noise at 1 kHz | 3.8 nV/√Hz |
| Low-Frequency Noise | 60 nV peak-to-peak from 0.1 Hz to 10 Hz |
| Input Offset Voltage | 10 µV |
| Offset Voltage Drift | 0.2 µV/°C |
| Common-Mode Rejection | 130 dB |
| Power-Supply Rejection | 130 dB |
主要差異化特點
- Exceptionally low wideband input noise (對比LT1007CS8#PBF)
- Guaranteed low-frequency noise performance (對比LT1007CJ8)
- Precision DC performance for low-level signals (對比LT1007CSW#PBF)
設計說明
Keep the two input leads physically close, route them as a compact differential pair, and minimize loop area around the sensitive input node. The Analog Devices manufacturer datasheet specifically advises that package leads should be short, the two input leads should be close together, and they should be maintained at the same temperature. These practices reduce susceptibility to thermoelectric effects, air currents, and electromagnetic pickup that could otherwise increase the effective noise or offset of this extremely low-noise amplifier.
Use a quiet, stable ground reference and place power-supply bypass capacitors close to the amplifier pins. The verified data confirms 130 dB power-supply rejection but does not provide the recommended capacitor values, so capacitor selection must follow the official LT1007/LT1037 datasheet. Avoid long supply traces and noisy switching nodes near the input and reference paths. If the source has very high impedance, guard the input node and account for board-surface leakage, contamination, and guard-ring construction.
Do not assume that a functional equivalent is a direct replacement. The verified comparison identifies LT1007CH as TO-5, while LT1007CS8#PBF uses SOIC-8 and LT1007CJ8 uses an 8-pin CERDIP. Forum-mentioned devices such as OPA227, TLE2027, LT1014, and OPA277 are not confirmed as pin-compatible TO-5 alternatives. A replacement requires verification of pin assignments, supply range, input and output common-mode limits, unity-gain stability, offset, noise, and package lead geometry.
Keep the two inputs at similar temperature because temperature gradients across the input pair can create offset drift beyond the specified 0.2 µV/°C value. Avoid mounting the TO-5 package near a hot regulator, power resistor, processor, or vent stream. The supplied data does not provide maximum junction temperature, thermal resistance, supply voltage, or quiescent current, so an actual dissipation calculation cannot be completed without the manufacturer electrical-characteristics tables.
合規資訊
The supplied search excerpts do not state the exact RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status of LT1007CH. Current manufacturer product and compliance documentation should be checked before qualification.
