LT1014DN - Quad Precision Op Amp, 14-PDIP | Texas Instruments
Артикул: LT1014DN ✓ АктивенLT1014DN Обзор
An operational amplifier is a high-gain DC-coupled electronic voltage amplifier with differential inputs that produces an output potential relative to ground. Precision op amps such as the LT1014 family are characterized by very low input offset voltage, low bias current, low noise, and high common-mode rejection ratio (CMRR). Within the broader taxonomy, the LT1014 sits at the intersection of instrumentation amplifiers and general-purpose amplifiers, positioned above simple comparators but below specialized zero-drift or chopper-stabilized amplifiers. Its four channels per package make it a workhorse for multi-channel signal conditioning where matched channel-to-channel DC behavior is required.
Key specifications include 50 µV maximum offset voltage, 0.3 µV/°C offset drift, 0.15 nA offset current, 117 dB CMRR, 120 dB power supply rejection ratio (PSRR), and a guaranteed 500 µA maximum supply current per amplifier. The output stage swings to within millivolts of both rails, and the common-mode input range includes the negative supply (ground in single-supply operation). Noise performance is 0.55 µV peak-to-peak from 0.1 Hz to 10 Hz, making the LT1014 well-suited for low-frequency precision applications.
The LT1014 architecture uses bipolar junction transistor input stages with laser-trimmed thin-film resistors to achieve low offset without external nulling. Notably, no offset null terminals are provided in the quad configuration, which is why the factory-trimmed 50 µV maximum is critical. The combination of low supply current (350 µA typical per amplifier) and 5V minimum supply makes the LT1014 unusually capable for both line-powered instrumentation and battery-powered precision circuits.
Typical applications include 4-20 mA current loop transmitters, strain gauge signal conditioners, thermocouple amplifiers, multiple limit threshold detection, active filters, and battery-powered precision instrumentation. The 14-pin PDIP package is favored for breadboard prototyping, laboratory instrumentation, and through-hole industrial designs where socket replacement is desirable.
When designing with the LT1014DN, observe that no offset null pins are present, so system offset must be tolerated or corrected downstream. The 14-PDIP package has higher thermal resistance than surface-mount equivalents, so multi-amp loads at high supply voltages may require derating. For new designs where SMT is acceptable, consider the LT1014DSW or similar surface-mount variants.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in a single manufacturer datasheet, with cross-references curated for engineers evaluating multi-channel precision analog front ends.
Аналоги без доработки для LT1014DN — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
LT1014DSW
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LT1014IN
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LT1014ACN
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
OP491GPZ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LM324AN
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LT1014DN Максимальные параметры и электрические характеристики
| Number of Channels | 4 (Quad) |
| Amplifier Type | Precision Operational Amplifier |
| Supply Voltage Range (Single) | 5 V to 44 V |
| Supply Voltage Range (Dual) | ±2.5 V to ±22 V |
| Input Offset Voltage (Max) | 50 µV |
| Offset Voltage Drift (Max) | 0.3 µV/°C |
| Input Offset Current (Max) | 0.15 nA |
| Open-Loop Gain (Typical) | 8,000,000 (8 million) |
| CMRR (Min) | 117 dB |
| PSRR (Min) | 120 dB |
| Supply Current per Amplifier (Max) | 500 µA |
| Low-Frequency Noise (0.1 Hz to 10 Hz) | 0.55 µV P-P |
| Package Type | 14-pin PDIP (N) |
| Тип монтажа | Through-Hole |
| Статус RoHS | Compliant |
| Lead-Free | Yes |
Конфигурация выводов LT1014DN
| Контакт 1 | OUT A — Amplifier A output |
| Контакт 2 | IN- A — Amplifier A inverting input |
| Контакт 3 | IN+ A — Amplifier A non-inverting input |
| Контакт 4 | V+ — Positive power supply |
| Контакт 5 | IN+ B — Amplifier B non-inverting input |
| Контакт 6 | IN- B — Amplifier B inverting input |
| Контакт 7 | OUT B — Amplifier B output |
| Контакт 8 | OUT C — Amplifier C output |
| Контакт 9 | IN- C — Amplifier C inverting input |
| Контакт 10 | IN+ C — Amplifier C non-inverting input |
| Контакт 11 | V- — Negative power supply (or GND for single supply) |
| Контакт 12 | IN+ D — Amplifier D non-inverting input |
| Контакт 13 | IN- D — Amplifier D inverting input |
| Контакт 14 | OUT D — Amplifier D output |
Типичное применение
LT1014DN подходит для 6 применениеs: 4-20 mA Current Loop Transmitter, Strain Gauge Signal Conditioner, Thermocouple Amplifier, Battery-Powered Precision Instrumentation, Active Filter Circuit, Multiple Limit Threshold Detector.
4-20 mA Current Loop Transmitter
The LT1014DN is specifically recommended by Analog Devices for 4-20 mA current loop transmitter designs, where its four independent precision amplifiers on a single die enable multiple loops on one IC. The 50 µV maximum input offset voltage and 0.3 µV/°C drift keep current-setting accuracy within the tight tolerances required by industrial process control standards. The 5V to 44V supply range covers both loop-powered and externally-powered transmitter topologies, and the 117 dB CMRR rejects common-mode noise from long field wiring runs. The quad configuration also allows a single chip to implement a complete XTR-compatible signal chain including V-to-I conversion, loop sense, and output protection buffering.
Рекомендуется
Strain Gauge Signal Conditioner
The LT1014DN excels in strain gauge signal conditioning bridges where the 50 µV maximum offset voltage is small compared to typical gauge output signals of 1-10 mV per volt of excitation. The 117 dB CMRR rejects common-mode voltages from the bridge excitation supply, while the 8 million open-loop gain preserves gain accuracy in the instrumentation front end. Four matched amplifiers in one package enable complete Wheatstone bridge excitation buffering, differential amplification, gain stage, and output filtering on a single IC. The wide 5V to 44V supply range supports both battery-powered portable gauges and industrial 24V bus-powered load cell systems.
Рекомендуется
Thermocouple Amplifier
The LT1014DN is well suited to thermocouple amplifier designs where the 0.55 µV P-P low-frequency noise (0.1 Hz to 10 Hz) is below the K-type thermocouple Seebeck coefficient of 40 µV/°C, preserving temperature resolution. The 50 µV offset contributes a fixed error of approximately 1.25°C, which is acceptable for many industrial temperature monitoring applications. Cold-junction compensation can be implemented with one of the four amplifiers, while the remaining three provide differential thermocouple amplification and output filtering. The 0.3 µV/°C offset drift is critical for thermocouples where the amplifier itself must not introduce significant temperature-dependent error.
Рекомендуется
Battery-Powered Precision Instrumentation
The LT1014DN's 500 µA maximum supply current per amplifier (350 µA typical) is unusually low for a precision quad, making it ideal for battery-powered instrumentation where every milliamp matters. Per the manufacturer datasheet, the device can operate from a single 5V supply, drawing only 1.4 mA typical for all four channels, enabling months of operation from a 9V battery in portable measurement equipment. The 5V minimum supply also allows direct operation from lithium or four-cell NiMH battery stacks, simplifying power architecture. The 120 dB PSRR further reduces power supply noise coupling into sensitive measurement channels, important in battery systems with switching regulators.
Рекомендуется
Active Filter Circuit
The LT1014DN's four matched amplifiers per package enable multi-pole active filter implementations on a single IC, reducing board space and improving channel-to-channel matching. The 8 million open-loop gain at DC and the unity-gain bandwidth of approximately 1 MHz support filter designs up to 100 kHz with minimal gain error. Low offset (50 µV) preserves filter passband accuracy, while the 117 dB CMRR rejects power supply noise in the filter stopband. Common configurations include Sallen-Key low-pass filters, multiple-feedback band-pass stages, and state-variable filters for instrumentation signal conditioning, all implementable on one quad device.
Рекомендуется
Multiple Limit Threshold Detector
The LT1014DN supports multi-channel limit threshold detection where four independent comparators on a single die enable monitoring of multiple process variables. While the LT1014 is not optimized as a comparator, its 50 µV offset and fast settling time make it suitable for threshold detection with well-defined output states. The 5V to 44V supply range accommodates both 5V logic-level and 24V industrial signal monitoring on a single chip. Four channels per package allow cost-effective monitoring of multiple sensor outputs, alarm trip points, and safety interlocks in industrial control systems where each comparator typically costs more than the entire quad IC.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для LT1014DN — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LT1014DSW | LT1014IN | LT1014ACN | OP491GPZ | LM324AN |
|---|---|---|---|---|---|---|
| Package | 14-PDIP (N) | 16-SOIC (DW) - different package | 14-PDIP (N) - same | 14-PDIP (N) - same | 14-PDIP (N) - same | 14-PDIP (N) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments |
| Input Offset Voltage (Max) | 50 µV | 50 µV | 50 µV | 30 µV (tighter) | 700 µV | 2 mV |
| Offset Drift (Max) | 0.3 µV/°C | 0.3 µV/°C | 0.3 µV/°C | 0.2 µV/°C (tighter) | 5 µV/°C | 7 µV/°C typical |
| CMRR (Min) | 117 dB | 117 dB | 117 dB | 120 dB | 90 dB | 70 dB |
| PSRR (Min) | 120 dB | 120 dB | 120 dB | 123 dB | 90 dB | 100 dB |
| Supply Current per Amp (Max) | 500 µA | 500 µA | 500 µA | 500 µA | 200 µA (lower) | 300 µA typical |
| Supply Voltage Range | 5V to 44V | 5V to 44V | 5V to 44V | 5V to 44V | 2.7V to 12V (narrower) | 3V to 32V |
| Channels per Package | 4 | 4 | 4 | 4 | 4 | 4 |
Ключевые отличия
- Factory-trimmed 50 µV offset with no external null required (против LM324AN)
- 0.3 µV/°C offset drift - 17x tighter than LM324AN (против LM324AN)
- 117 dB CMRR vs 70 dB for LM324AN (против LM324AN)
- 5V to 44V supply range supports battery and industrial rails (против OP491GPZ)
Заметки по проектированию
Estimated: The LT1014DN at ±15V dual supply draws approximately 1.4 mA typical total quiescent current (350 µA per amplifier x 4). For battery-powered designs, this is acceptable for a 9V battery source, but at ±22V the supply current can rise significantly. A single 5V supply minimizes power consumption to about 0.7 mA total, making the LT1014DN one of the lowest-power precision quads available. Per the manufacturer datasheet, supply voltage must remain within the 5V to 44V absolute maximum range, with proper decoupling (100 nF ceramic at each supply pin) required for high-PSRR performance.
The 14-pin PDIP (N) package has a typical thermal resistance of approximately 100 C/W junction-to-ambient, which is higher than SOIC or QFN equivalents. At full ±15V supply with 1 mA load per channel, the chip dissipates approximately 120 mW, yielding a 12°C temperature rise above ambient. This is well within operating limits for commercial temperature grades. For industrial or military temperature ranges with elevated ambient temperatures, ensure adequate airflow or consider the surface-mount LT1014DSW with a 16-SOIC footprint for lower thermal resistance and better high-temperature derating.
Do not assume the LT1014DN provides external offset null pins - the quad 14-PDIP configuration omits null terminals to maximize amplifier count in the standard pinout. The factory-trimmed 50 µV maximum offset is the system-level specification that must be tolerated or corrected downstream. Additionally, observe that the common-mode input range includes the negative supply (ground in single-supply operation), but the upper limit is approximately 1.5V below the positive supply. Exceeding this input range causes phase reversal and possible output stage damage.
For optimal PSRR performance (120 dB), place 100 nF ceramic bypass capacitors as close as possible to the V+ and V- supply pins, with additional 10 µF bulk capacitors at the IC supply entry point. Keep input traces short and guarded to minimize leakage and stray pickup, especially on high-impedance instrumentation inputs. The PDIP through-hole package is well-suited for socketed prototyping, but for production designs, use the LT1014DSW surface-mount variant for smaller board area and improved thermal performance.
The LT1014DN's 0.55 µV P-P low-frequency noise (0.1 Hz to 10 Hz) is critical for precision DC measurements below 10 Hz, including thermocouple and strain gauge applications. For higher-frequency noise above 10 Hz, the LT1014DN's wideband noise of 22 nV/√Hz typical is competitive with other precision quads. According to the Analog Devices datasheet, low-frequency noise can be reduced by additional filtering at the output, but the 1/f corner at approximately 5 Hz is intrinsic to the bipolar input stage. For applications requiring sub-microvolt noise below 1 Hz, consider a chopper-stabilized amplifier instead.
Информация о соответствии
RoHS compliant per TI/Analog Devices product listings. Lead-free 14-PDIP package. AEC-Q100 automotive qualification not applicable for this part - automotive designs should use AEC-Q100 qualified precision quads. Operating temperature grade for the LT1014DN suffix requires verification against the datasheet ordering information table.
