LT1007CJG - Low-Noise Precision Op Amp | Texas Instruments
MPN: LT1007CJG ✓ نشطLT1007CJG نظرة عامة
An operational amplifier is a voltage-feedback amplifier that uses high differential gain to amplify the difference between its non-inverting and inverting inputs. Within the wider signal-chain hierarchy, the LT1007CJG belongs to the precision amplifier class, which sits between general-purpose amplifiers and instrumentation amplifiers. Its noise and offset characteristics make it suitable when signals must be measured, converted, filtered, buffered, or referenced with little added error.
The LT1007 series emphasizes low-noise signal handling with a 1/f noise corner frequency of 2 Hz and 60 nV peak-to-peak noise from 0.1 Hz to 10 Hz. The 10 µV input-offset voltage and 0.2 µV/°C drift limit input-referred error in slowly varying or high-gain stages. The amplifier also provides 130 dB common-mode rejection and power-supply rejection, reducing sensitivity to supply noise and shared ground-bus disturbances.
A unity-gain-stable configuration supports direct signal buffering, while the instrumentation characteristics support precision gain stages. The device is intended for low-level sensor front ends, strain-gage and bridge excitation, precision current-to-voltage conversion, audio and low-frequency measurement circuits, laboratory instrumentation, and high-gain analog systems. Decoupling capacitors should be placed close to the supply pins so switching ripple and high-frequency supply variation do not modulate the output.
For DC-sensitive applications, account for input-bias current of 55 nA when working with high-impedance sources. Because the CDIP package has eight through-hole leads, the amplifier fits conventional 0.300-inch, 7.62 mm row spacing and is easy to prototype or socket on laboratory and industrial boards.
This page consolidates the LT1007CJG electrical characteristics, package details, design guidance, and drop-in family alternatives into a single engineering reference. Use the pin-description table and application information in the manufacturer datasheet when assigning PCB tracks, bypassing supply rails, and closing the loop around this amplifier.
بدائل مباشرة لـ LT1007CJG — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
LT1007CN8
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LT1007CN8#PBF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LT1007ACN8
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LT1007CJG الحدود القصوى والخصائص الكهربائية
| Number of Circuits | 1 |
| Amplifier Type | Standard general-purpose precision operational amplifier |
| Input Noise Density | 2.5 nV/√Hz wideband |
| Low-Frequency Noise Corner | 2 Hz |
| 0.1 Hz to 10 Hz Noise | 60 nV peak-to-peak |
| Input Offset Voltage | 10 µV |
| Input Offset Drift | 0.2 µV/°C |
| Common-Mode Rejection | 130 dB |
| Power-Supply Rejection | 130 dB |
| Input Bias Current | 55 nA |
| Slew Rate | 2.5 V/µs |
| العلبة | 8-CDIP, 0.300 inch (7.62 mm) body width |
| عدد الدبابيس | 8 |
| نوع التركيب | Through-hole |
| Temperature Grade | Commercial |
تكوين أطراف LT1007CJG
| دبوس 1 | NC — Not connected |
| دبوس 2 | -IN — Inverting input |
| دبوس 3 | +IN — Non-inverting input |
| دبوس 4 | V- — Negative supply connection |
| دبوس 5 | NC — Not connected |
| دبوس 6 | OUT — Amplifier output |
| دبوس 7 | V+ — Positive supply connection |
| دبوس 8 | NC — Not connected |
التطبيقات النموذجية
LT1007CJG مناسب لـ 6 التطبيقs: Strain-Gage and Bridge Sensor Amplification, Precision Current-to-Voltage Conversion, Low-Level Sensor Signal Conditioning, Audio and Low-Frequency Measurement, Precision Instrumentation and Laboratory Equipment, Precision Reference and Buffering Circuits.
Strain-Gage and Bridge Sensor Amplification
The LT1007CJG suits strain-gage bridges because its 2.5 nV/√Hz input-noise density and 0.2 µV/°C offset drift limit the error added to a millivolt-level differential signal. Place the amplifier in a differential configuration, balance the bridge resistors, and keep input traces short and shielded from motor and switching nodes. Its 55 nA input-bias current produces a small error with ordinary bridge impedances but becomes more significant at megohm source resistance. The 8-CDIP footprint also simplifies prototype wiring and socketed laboratory fixtures where rework and component replacement are frequent.
موصى به
Precision Current-to-Voltage Conversion
The LT1007CJG can convert small sensor currents into a measurable voltage when the transimpedance feedback resistor and compensation network are selected carefully. Its 10 µV input-offset voltage and 130 dB common-mode rejection reduce output error, while the 2.5 nV/√Hz noise density helps resolve small current changes. The 55 nA bias current is the more important limitation for picoamp and femtoamp measurements, so guard rings and low-leakage PCB materials may be required. Use the CDIP package where a socketed or hand-wired analog board is more practical than a compact surface-mount layout.
موصى به
Low-Level Sensor Signal Conditioning
The LT1007CJG is appropriate for conditioning weak sensor outputs where added noise and drift could obscure the measured quantity. Its 2 Hz 1/f corner and 60 nV peak-to-peak noise over 0.1 Hz to 10 Hz are valuable for slow thermistors, resistance bridges, and electrochemical sensors. Use the amplifier for gain and buffering while keeping the first high-impedance node physically short and isolated from thermal sources. Because input bias current reaches 55 nA, resistive sensor networks should be scaled so their Thevenin impedance does not create an excessive offset error.
موصى به
Audio and Low-Frequency Measurement
The LT1007CJG can process low-level audio signals when the design objective is low-noise amplification rather than maximum bandwidth. Its 2.5 nV/√Hz input-noise density and 60 nV peak-to-peak noise from 0.1 Hz to 10 Hz help preserve quiet program material and low-frequency measurements. The amplifier's 130 dB common-mode rejection reduces interference coupled from shared signal returns, while 2.5 V/µs slew rate provides ample headroom for moderate-amplitude waveforms. Maintain symmetric feedback resistors and keep the output load within the amplifier's specified operating conditions.
موصى به
Precision Instrumentation and Laboratory Equipment
The LT1007CJG is well matched to laboratory instruments that amplify small voltages while requiring low offset drift and predictable low-frequency noise. It can serve as a buffer ahead of an ADC or as the first gain stage in a precision measurement chain. The through-hole CDIP package supports socketed assembly, modular analog boards, and repairable laboratory instruments. Supply bypassing should be placed close to the power pins, and the analog ground return should avoid sharing a path with motors, relays, or switching-converter currents that could modulate the measured signal.
موصى به
Precision Reference and Buffering Circuits
The LT1007CJG can buffer low-current reference nodes without adding substantial noise or offset error, which is useful when driving a subsequent converter, measurement block, or resistive network. Its 10 µV offset voltage and low drift help preserve reference accuracy, while 55 nA input bias current limits the error introduced into high-impedance reference dividers. Use short, guarded traces around the reference input and avoid excessive capacitive loading at the output. The CDIP footprint also permits socket-based calibration or component substitution in modular instrumentation designs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LT1007CJG — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LT1007CN8 | LT1007CN8#PBF | LT1007ACN8 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-CDIP (0.300 inch, 7.62 mm) | 8-CDIP (0.300 inch, 7.62 mm) | 8-CDIP (0.300 inch, 7.62 mm) | 8-CDIP (0.300 inch, 7.62 mm) |
| Number of Circuits | 1 | 1 | 1 | 1 |
| Input Noise Density | 2.5 nV/√Hz wideband | 2.5 nV/√Hz wideband | 2.5 nV/√Hz wideband | 2.5 nV/√Hz wideband |
| Input Offset Voltage | 10 µV | 10 µV | 10 µV | 10 µV |
| Input Offset Drift | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C | 0.2 µV/°C |
| Input Bias Current | 55 nA | 55 nA | 55 nA | 55 nA |
| Common-Mode and Power-Supply Rejection | 130 dB | 130 dB | 130 dB | 130 dB |
| Slew Rate | 2.5 V/µs | 2.5 V/µs | 2.5 V/µs | 2.5 V/µs |
أبرز الفروقات
- Combines exceptionally low wideband noise with low offset drift (مقابلLT1007CN8)
- Maintains a conventional leaded footprint for repairable analog boards (مقابلLT1007CS8#PBF)
- Targets low-frequency precision measurements with in-family leaded alternatives (مقابلOPA227)
ملاحظات التصميم
Place the input and output components close to the associated LT1007CJG pins and connect ceramic bypass capacitors directly across the supply pins and ground. Keep the sensitive input node compact, away from switching nodes and high-current return paths. For bridge or high-impedance sensors, use guarding on the input trace and clean PCB surface materials to reduce leakage, particularly because the amplifier's 55 nA input-bias current can create a measurable offset at high source impedances.
Treat the non-inverting input as a high-impedance, low-current node. Keep it short, shield it from temperature gradients, and avoid connecting test-probe fixtures with long cables unless the source impedance and bias-current error have been evaluated. The 10 µV offset specification and 0.2 µV/°C drift are excellent for precision stages, but those advantages are undermined if the sensor reference and amplifier drift together or if leakage varies around the input.
Do not assume that every LT1007 ordering option is mechanically interchangeable. The LT1007CJG uses an 8-lead CDIP footprint, while the LT1007CS8#PBF is an 8-lead surface-mount part and therefore requires a different PCB footprint. Also verify the exact supply range, temperature grade, and test conditions for the selected suffix in the manufacturer documentation before releasing a substitution into production.
Use separate local bypass and bulk-decoupling paths for the amplifier rail. The 130 dB power-supply rejection specification reduces sensitivity to supply ripple, but it does not remove the need for correct decoupling or prevent transient disturbances from reaching the output. Return the capacitor ground leads to a quiet analog-ground point rather than routing them through a noisy power-supply return segment.
معلومات الامتثال
No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified for the exact LT1007CJG ordering configuration. Confirm current declarations with the manufacturer before procurement.
