LT1013CP - Dual Precision Op Amp, 4-44V | Texas Instruments
N.º de pieza: LT1013CP ✓ ActivoLT1013CP Descripción general
A dual precision op amp is a two-channel integrated operational amplifier that combines matched transistor pairs and laser-trimmed thin-film resistors to achieve DC accuracy comparable to chopper-stabilized designs while consuming milliwatts of power. Within the broader component taxonomy, dual op amps sit under operational amplifiers -> amplifiers -> analog ICs -> semiconductor. The LT1013 was the first precision dual op amp in the 8-pin industry-standard pinout, upgrading legacy devices such as the MC1458/MC1558, LM158, and OP-221 with significantly lower noise and better DC stability.
Key features include 150 µV max input offset voltage (LT1013A) with 2.5 µV/°C max offset voltage temperature coefficient, 0.5 mA typical supply current per amplifier, single-supply operation from 4V to 44V, ground-sensing input range, and output swing to within millivolts of ground. The NPN input stage delivers low input bias current and low voltage noise density suitable for transducer and instrumentation front-ends.
Typical applications include battery-powered precision instrumentation, strain-gauge signal conditioners, thermocouple amplifiers, 4 mA to 20 mA current-loop transmitters, active filters, multiple limit threshold detection, and instrumentation amplifier building blocks. The wide supply range and ground-sensing inputs make it ideal for single-supply industrial and process-control systems.
When designing with this part, observe the input common-mode limit: although the inputs include ground, the upper common-mode limit is approximately 1.5V below the positive rail. Place a 0.1 µF bypass capacitor close to the supply pin and add a 10 µF bulk capacitor on the supply rail to maintain low-impedance power across the LT1013's full bandwidth.
Alternativas directas para LT1013CP — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
LT1013ACP
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LT1013IP
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LT1013AIP
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LT1013CN8
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LT1013CDR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LT1013CP Valores máximos y características eléctricas
| Number of Channels | 2 (Dual) |
| Amplifier Type | Precision / General Purpose |
| Supply Voltage Range (Single) | 4 V to 44 V |
| Supply Voltage Range (Dual) | ±2 V to ±22 V |
| Input Offset Voltage (Max, LT1013A) | 150 µV at 25°C |
| Offset Voltage Temperature Coefficient (Max, LT1013A) | 2.5 µV/°C |
| Supply Current per Amplifier (Typ) | 0.5 mA |
| Input Common-Mode Range | Includes ground (V-) |
| Output Swing to Ground | Within a few millivolts (while sinking current) |
| Rango de temperatura de funcionamiento | 0°C to 70°C (C suffix) |
| Encapsulado | 8-PDIP (P) |
| Recuento de pines | 8 |
| Tipo de montaje | Through-Hole |
| Gain | High (open-loop) |
| Lead-Free | Yes (per TI product page P suffix) |
Configuración de pines de LT1013CP
| Pin 1 | OUT A — Output of amplifier A |
| Pin 2 | IN- A — Inverting input of amplifier A |
| Pin 3 | IN+ A — Non-inverting input of amplifier A |
| Pin 4 | V- — Negative supply (ground in single-supply operation) |
| Pin 5 | IN+ B — Non-inverting input of amplifier B |
| Pin 6 | IN- B — Inverting input of amplifier B |
| Pin 7 | OUT B — Output of amplifier B |
| Pin 8 | V+ — Positive supply |
Aplicaciones típicas
LT1013CP es adecuado para 6 aplicacións: Battery-Powered Precision Instrumentation, Strain-Gauge Signal Conditioner, Thermocouple Amplifier, 4-20 mA Current-Loop Transmitter, Active Filter Building Block, Multiple Limit Threshold Detector.
Battery-Powered Precision Instrumentation
The LT1013CP's 0.5 mA per-amplifier supply current and 4 V to 44 V supply range make it ideal for battery-powered precision instruments where both runtime and DC accuracy matter. Its 150 µV maximum input offset (LT1013A grade) preserves measurement accuracy at low signal levels, and the ground-sensing input common-mode range simplifies single-supply sensor interfaces. Compared to a chopper-stabilized amplifier, the LT1013CP trades a small amount of offset drift for a much lower quiescent current, which directly extends battery life in portable data loggers, handheld multimeters, and field-calibration equipment.
Recomendado
Strain-Gauge Signal Conditioner
Strain-gauge bridges produce millivolt-level differential signals that demand low-offset, low-drift amplification, exactly what the LT1013CP provides. Its 150 µV maximum input offset (LT1013A) and 2.5 µV/°C max offset drift keep bridge excitation errors well below typical gauge sensitivities, while the 4 V to 44 V supply range allows the bridge excitation and the op amp to share the same rail. Place the LT1013CP as the first-stage instrumentation amplifier building block, with gain set by external precision resistors, to deliver a clean, scaled output for the ADC.
Recomendado
Thermocouple Amplifier
Thermocouple signals are low-amplitude (tens of µV/°C) and require low-drift amplification with cold-junction compensation. The LT1013CP's 2.5 µV/°C maximum offset voltage temperature coefficient (LT1013A) makes it well suited as a precision thermocouple front-end, and the wide supply range accommodates both battery and line-powered temperature transmitters. The ground-sensing input simplifies single-supply cold-junction compensation circuits built around a precision silicon diode or dedicated temperature sensor. For higher-precision applications, a chopper-stabilized amp may be preferred.
Recomendado
4-20 mA Current-Loop Transmitter
The 4-20 mA current loop is the workhorse of industrial process control, and the LT1013CP is explicitly listed by TI as a recommended part for loop transmitter designs. Its 4 V to 44 V supply range gives the compliance headroom needed to drive 20 mA into a 1 kΩ loop load (20 V drop) plus loop supply, while the ground-sensing input allows the input signal to be referenced to the same ground as the loop return. The low 0.5 mA per-amp supply current leaves plenty of budget for the loop current, and the precision offset keeps transmitter calibration stable.
Recomendado
Active Filter Building Block
The LT1013CP works well as a building block for active low-pass, high-pass, and band-pass filters in instrumentation and audio signal-conditioning paths. Its dual-channel configuration lets designers realize two-pole Sallen-Key or multiple-feedback filters in a single 8-pin package, and its low noise preserves filter dynamic range. The wide supply range supports both single-supply sensor filters and dual-supply audio crossover networks. Choose A-grade for filters where DC offset matters (e.g. low-frequency integrators) and the standard grade for AC-only filter sections.
Recomendado
Multiple Limit Threshold Detector
The LT1013CP's dual-channel configuration is ideal for window-comparator and multiple-limit threshold detection in alarm and monitoring systems. Each channel can be wired as a comparator with a precision reference, providing two independent threshold detectors in one 8-pin PDIP. The wide supply range (4 V to 44 V) accepts the same rail that powers the sensor or transducer being monitored, simplifying power architecture. The low supply current keeps continuous-monitoring battery drain minimal.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LT1013CP — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LT1013ACP | LT1013IP | LT1013AIP | LT1013CN8 | LT1013CDR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-PDIP (P) | 8-PDIP (P) - same | 8-PDIP (P) - same | 8-PDIP (P) - same | 8-PDIP (P) - same | 8-SOIC (D) - different footprint |
| Input Offset Voltage (Max) | 200–400 µV (typ, CP grade) | 150 µV (A-grade) | 200–400 µV (typ, IP grade) | 150 µV (A-grade) | 200–400 µV (CN8 grade) | 200–400 µV (CDR grade) |
| Supply Voltage Range | 4 V to 44 V | 4 V to 44 V | 4 V to 44 V | 4 V to 44 V | 4 V to 44 V | 4 V to 44 V |
| Supply Current per Amplifier (Typ) | 0.5 mA | 0.5 mA | 0.5 mA | 0.5 mA | 0.5 mA | 0.5 mA |
| Operating Temperature Range | 0°C to 70°C (Commercial) | 0°C to 70°C | -40°C to 85°C (Industrial) | -40°C to 85°C (Industrial) | 0°C to 70°C | 0°C to 70°C |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Mounting Type | Through-Hole (PDIP) | Through-Hole | Through-Hole | Through-Hole | Through-Hole | Surface Mount (SOIC) |
| A-Grade Precision (150 µV max offset) | No (CP grade) | Yes | No | Yes | No | No |
Diferenciadores clave
- A-grade option with guaranteed 150 µV max input offset voltage (frente a LT1013ACP)
- Industrial temperature variant for harsh environments (frente a LT1013IP)
- First precision dual op amp in the 8-pin industry-standard pinout (frente a MC1458 / LM158 legacy dual op amps)
Notas de diseño
Place a 0.1 µF ceramic bypass capacitor as close as possible to the V+ pin (pin 8) and a 10 µF bulk tantalum or aluminum electrolytic capacitor on the supply rail. The LT1013's wide 4 V to 44 V supply range is forgiving, but high-impedance circuits and high-gain configurations are sensitive to supply noise. In dual-supply designs, bypass both V+ and V- pins. Estimated: typical supply current for the dual is 1 mA, so the bulk capacitor only needs to supply a few hundred microseconds of hold-up during transients.
For high-gain (>100) or low-offset applications, use a guard ring driven by a low-impedance point at the same potential as the sensitive input to minimize leakage across the PDIP-8 package. Keep input traces short and routed away from digital switching lines to preserve the LT1013's 150 µV max input offset (LT1013A grade). Use a star-ground topology so the return current of the load does not flow through the op amp's ground pin. Estimated trace length budget: keep sensitive input traces under 10 mm where practical.
Do not assume the input common-mode range extends to V+: the upper common-mode limit is approximately 1.5 V below V+ for the LT1013. Also, while the output can swing to within a few millivolts of ground (V-) while sinking current, it cannot source current all the way to V-; this asymmetry is normal for the LT1013 architecture. For true rail-to-rail input AND output operation, choose a different op amp such as the LMV321 or OPA2188. The LT1013's 0.5 mA per-amp supply current is much higher than modern CMOS op amps; do not use it where sub-100 µA quiescent current is required.
Información de cumplimiento
RoHS and REACH status not directly stated in the provided Verified Web Data; set to 'unknown' per data authenticity rules. Lead-free is indicated by the P (PDIP) package suffix on the TI product page. The part is not AEC-Q100 qualified (not an automotive-grade part). Refer to the latest TI material declaration for full compliance certification.
