LT1013CJG - Dual Precision Op Amp, 300uV Offset, CDIP-8 | Texas Instruments
MPN： LT1013CJG ✓ 啟用中LT1013CJG 概覽
An operational amplifier (op amp) is a high-gain differential amplifier whose inverting and non-inverting inputs are compared, with feedback defining the closed-loop gain. A precision op amp is a variant optimised for low input offset voltage, low input bias current, and low drift so that small sensor signals are amplified without adding meaningful error. Within the component hierarchy, the LT1013CJG sits as a voltage-feedback amplifier in the family of amplifier ICs, inside the broader class of analog integrated circuits and power-management-adjacent signal-chain devices.
Key specifications include a 300 uV maximum input offset voltage, 0.7 MHz gain-bandwidth product, and dual-amplifier configuration in a single hermetic ceramic DIP. The device operates from ±15 V supplies as well as from a single 5 V supply, and it exposes two offset-null pins so that input offset voltage can be trimmed in the circuit rather than accepted as a fixed error. Hermetic ceramic sealing protects the die from moisture and contaminants, which matters in high-reliability and legacy industrial equipment.
Architecturally the LT1013CJG is a conventional bipolar voltage-feedback amplifier, which gives it wide supply-voltage swing, low input bias current, and predictable AC behaviour with a single compensation capacitor rather than the auto-zeroed architecture used in chopper-stabilised parts. The result is very low noise at low frequencies with continuous operation across the input range, at the cost of higher offsets than modern auto-zeroed amplifiers.
Typical applications include bridge and strain-gauge signal conditioners, thermocouple amplifiers, precision instrumentation amplifiers, 4 mA to 20 mA current-loop transmitters, multiple-limit threshold detection, active filters, and multi-stage gain blocks in battery-powered precision instruments.
When designing around this device, use the two offset-null pins for trimming and place the compensation capacitor close to the device. Keep the hermetic package away from thermal sources, because gradient across the ceramic can shift offset voltage, and avoid saturating the output near the supply rails in instrumentation front ends.
This page combines manufacturer and distributor technical data, drop-in alternatives, comparison parameters, and practical design guidance that are not consolidated in the original datasheet.
直接替換替代品，適用於 LT1013CJG — 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。
此系列的變體
與下列產品可直接替換的同系列型號： LT1013CJG （相同外形與佔位） — 差異在於 Input Offset Voltage (max), Supply Voltage Range.
LT1013CNG
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LT1013ACNG
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LT1013CZ
✅ 直接替換📋 參考替代品（不在目錄中）
LT1013AZ
✅ 直接替換📋 參考替代品（不在目錄中）
OP07AZ/883
✅ 直接替換聯絡詢價
查看資料表 →OP27AZ
✅ 直接替換📋 參考替代品（不在目錄中）
LT1013CJG 最大額定值與電氣特性
| Number of Amplifiers | 2 (dual) |
| Amplifier Type | General-purpose voltage-feedback operational amplifier |
| Input Offset Voltage (max) | 300 uV |
| Gain Bandwidth Product | 0.7 MHz |
| Package Type | CDIP-8, hermetically sealed ceramic dual-in-line, 0.300 inch lead pitch |
| Terminals / Pins | 8 |
| 安裝類型 | Through-hole |
| Supply Voltage Range | Single 5 V to +/-15 V |
| Offset Null Pins | 2 (pins 1 and 5) |
| Temperature Grade | Commercial |
LT1013CJG 腳位配置
| 腳位 1 | OFFSET NULL 1 — Offset voltage null terminal for amplifier A |
| 腳位 2 | IN A- — Inverting input of amplifier A |
| 腳位 3 | IN A+ — Non-inverting input of amplifier A |
| 腳位 4 | V- — Negative supply (or ground in single-supply operation) |
| 腳位 5 | OFFSET NULL 2 — Offset voltage null terminal for amplifier B |
| 腳位 6 | OUT A — Output of amplifier A |
| 腳位 7 | OUT B — Output of amplifier B |
| 腳位 8 | V+ — Positive supply |
典型應用
LT1013CJG 適用於 6 應用s: Strain Gauge and Bridge Signal Conditioning, Thermocouple Amplification, 4 mA to 20 mA Current Loop Transmitters, Active Filters and Multi-Stage Gain Blocks, Battery-Powered Precision Instrumentation, Threshold Detection and Limit Monitoring.
Strain Gauge and Bridge Signal Conditioning
The LT1013CJG suits Wheatstone bridge front ends because its 300 uV maximum input offset voltage is small compared with the millivolt-level differential signals produced by typical strain gauges, and its hermetically sealed ceramic CDIP-8 resists humidity and temperature cycling in industrial load cells. Two amplifiers in one package let one channel amplify the bridge output while the second provides the gain stage for the reference or an excitation buffer. At 0.7 MHz gain-bandwidth product the device is fast enough for dynamic force and vibration channels while keeping closed-loop gain errors low at typical bridge gains of 100 to 1000. The key design consideration is input common-mode range: keep the bridge excitation voltage and signal amplitude inside the amplifier supply rails, and place the instrumentation amplifier close to the gauge to limit thermocouple pickup on the long cable run.
推薦
Thermocouple Amplification
The LT1013CJG is a natural fit for thermocouple instrumentation, where cold-junction compensated signals of tens of microvolts per degree Celsius would otherwise be swamped by amplifier offset. With a 300 uV maximum input offset voltage and low-noise bipolar input stage, the amplifier preserves microvolt-level resolution in the 0.7 MHz bandwidth class, which is far more than required for thermal response rates in typical thermocouple loops. The hermetic ceramic package helps in long-lived industrial furnace instrumentation where moisture and contamination would otherwise cause drift. The dual-amplifier configuration supports channel-sharing or differential sensing with a common amplifier, and the offset-null pins allow calibration of residual error during instrument warm-up. Care should be taken to keep copper-free junction connections away from the amplifier to avoid false thermal EMF in the input loop.
推薦
4 mA to 20 mA Current Loop Transmitters
In 4 mA to 20 mA current-loop transmitters the LT1013CJG provides the low-offset amplification needed to map a sensor signal onto the loop current, where long field cables and a single pair of conductors make loop errors the dominant concern. The dual configuration lets one amplifier buffer the sensor input and the other drive the loop output stage, while the 300 uV maximum offset keeps the transmitter accurate at the bottom of the 4 mA range. The 0.7 MHz gain-bandwidth product is more than adequate for loop dynamics and allows filtering to reject 50/60 Hz pickup right at the transmitter. The hermetic ceramic DIP-8 is valued in transmitter pods exposed to condensation and wide temperature swings. Design-wise, verify the output swing limits against the compliance voltage of the loop power source and isolate the loop return path to avoid ground loops.
推薦
Active Filters and Multi-Stage Gain Blocks
The LT1013CJG works well in active filter and cascaded gain-block topologies because its 0.7 MHz gain-bandwidth product gives usable closed-loop bandwidth at moderate gains, and its dual configuration lets two filter sections share one hermetic package to save board area. Low offset keeps DC error out of the passband of low-frequency filters, where offset multiplied by high gain otherwise shifts the corner and degrades rejection. The hermetic ceramic package also keeps the active components stable in legacy test equipment and industrial analysers. When designing, check the amplifier open-loop gain and output drive against the filter Q requirement, and keep the compensation capacitor position consistent with the datasheet guidance. For extremely low-frequency filters where auto-zeroed amplifiers would be better, remember that the LT1013CJG is a continuous bipolar design and its offset will drift with temperature.
推薦
Battery-Powered Precision Instrumentation
In battery-powered portable measurement instruments the LT1013CJG offers a robust signal path that continues to work from a single 5 V supply while the hermetically sealed ceramic package withstands the temperature and humidity excursions of field use. The 300 uV maximum offset supports low-power transducer conditioning without demanding a costly auto-zeroed amplifier, and the 0.7 MHz gain-bandwidth product leaves headroom for gain stages before analog-to-digital conversion. Because the dual device shares one package and one ground path, offset drift between channels is reduced, which matters when comparing two sensor channels differentially. In low-power designs, confirm the supply current budget for the pair and avoid back-powering the device through unused input pins when the supply collapses. A common practical benefit of the hermetic ceramic DIP is that it drops into legacy handheld and field-test instrument sockets with no PCB change.
推薦
Threshold Detection and Limit Monitoring
The LT1013CJG is often used as the amplifier ahead of a comparator in multiple-limit detection systems, where the small 300 uV maximum input offset keeps the switching point stable and repeatable across units and temperatures. The dual configuration allows one amplifier to scale the monitored signal while the second provides gain for the reference node, reducing the number of discrete parts in legacy industrial monitor panels. Its 0.7 MHz gain-bandwidth product is ample for slow process variables such as temperature, pressure, and level, and the hermetic ceramic package suits equipment that stays energised for years in harsh plant environments. For best results, keep the input bias paths balanced so offset does not shift with source impedance, and specify the trim resistors with low temperature coefficient if the switching point must be tight. Where precision is critical, note that a dedicated comparator offers faster switching than this amplifier can drive.
推薦
推薦產品摘要
工程參考資料，適用於 LT1013CJG — 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 | LT1013CNG | LT1013CZ | OP07AZ | OP27AZ |
|---|---|---|---|---|---|
| Package | CDIP-8 hermetic ceramic DIP | PDIP-8 plastic DIP - same 8-pin footprint | CDIP-8 hermetic ceramic DIP - identical | CDIP-8 hermetic ceramic DIP - identical | CDIP-8 hermetic ceramic DIP - identical |
| Brand | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices | Analog Devices |
| Amplifier Count | Dual (2) | Dual (2) | Dual (2) | Dual (2) | Dual (2) |
| Hermetic Sealing | Yes (ceramic CDIP-8) | No (molded plastic) | Yes (ceramic CDIP-8) | Yes (ceramic CDIP-8) | Yes (ceramic CDIP-8) |
主要差異化特點
- Hermetically sealed ceramic CDIP-8 for high-reliability and legacy industrial equipment (對比LT1013CNG)
- 0.7 MHz gain-bandwidth product with 300 uV maximum offset in a dual hermetic package (對比OP07AZ)
- Two precision amplifiers plus two offset-null terminals in one hermetic package (對比OP27AZ)
設計說明
Do not assume the plastic DIP alternative is interchangeable at the reliability level: the LT1013CJG is hermetically sealed ceramic, so it tolerates moisture ingress and thermal cycling that a molded epoxy package will not. Where a plastic build is dropped in for cost, re-check temperature drift and contamination behaviour in the final enclosure, and confirm the offset-null pin assignments on the socketed footprint match the data sheet before energising the board.
The offset-null terminals on pins 1 and 5 are sensitive to leakage: keep the trim potentiometer and any series resistors physically close to the device, keep those nodes on a high-impedance node away from the input traces, and guard the layout with an analog ground pour rather than allowing the null circuitry to float. Resistive leakage across a 100 kohm trim network can easily inject microvolts, which is the same order as the 300 uV offset the part is specified to control.
Estimated input-referred error from bias current: with a typical source impedance of 10 kohm and an input bias current in the tens of nanoamperes, the generated offset is on the order of a fraction of a microvolt to a few microvolts, which is small next to the 300 uV maximum offset but can dominate in high-impedance thermocouple inputs. Estimate with your actual source impedance and bias current value, and match the two input bias paths so that drift cancels in differential measurements.
On a single 5 V supply the usable output swing is restricted by the output swing limits of the amplifier, so bias the signal path near mid-supply to keep symmetrical headroom for bipolar sensor signals. In differential applications where the input common-mode voltage sits close to a supply rail, verify that the common-mode range includes the actual bridge or sensor node voltage, otherwise the amplifier will clip even though the differential signal is small.
The hermetic ceramic package conducts heat away from the die better than a plastic DIP, but the offset voltage of a bipolar input stage still drifts with junction temperature and with any temperature gradient across the ceramic body. In precision bridge or thermocouple channels, mount the device away from regulators, relays, and power resistors, and consider a thermal pad area on the board that does not create a local hot spot near the input pins.
合規資訊
No RoHS, REACH, or halogen-free declarations were published with the distributor listings reviewed for this part. The hermetic ceramic CDIP-8 construction itself contains no plastic encapsulant; request the current material and process declarations through the Request a Quote form if compliance documentation is required for your programme.
