LT1001CD - Precision Op-Amp 8-SOIC | Texas Instruments
MPN: LT1001CD ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.91 | $1.91 |
| 10 | $1.72 | $17.20 |
| 100 | $1.53 | $153.00 |
| 500 | $1.34 | $670.00 |
| 1,000 | $1.15 | $1,150.00 |
LT1001CD Overview
A precision op-amp is a type of operational amplifier designed to minimize the input-referred errors (offset voltage, bias current, drift, and noise) that limit DC accuracy. In the system hierarchy, the LT1001CD sits at the precision tier of general-purpose amplifiers, above standard 741-class parts and below chopper-stabilized zero-drift amplifiers. It is the workhorse of 16-bit and lower data-acquisition front ends, weigh scales, strain-gauge bridges, and thermocouple conditioning circuits where 10-100 uV of error must be resolved over industrial temperature ranges.
Key features of the LT1001CD include 110 uV maximum input offset voltage, 4 nA maximum input bias current, 102 dB minimum open-loop gain, and 0.3 uV/C offset voltage drift. The device operates from +/-3 V to +/-18 V dual supplies or 6 V to 36 V single supply. Its bipolar input stage supports true differential sensing across the full input common-mode range, including ground-referenced signals when operated from a single supply. The C-grade commercial temperature range is 0C to +70C.
Architecturally, the LT1001CD uses a precision bipolar input stage with active bias compensation, allowing it to maintain low offset and bias current over temperature without chopper-induced switching artifacts. The internal compensation network is unity-gain stable, eliminating the need for external compensation capacitors. The result is a versatile amplifier that combines 741-class simplicity with significantly tighter DC specifications.
Typical applications include precision weighing scales, strain-gauge and load-cell amplifiers, thermocouple and RTD signal conditioning, medical instrumentation front ends, 16-bit SAR ADC input buffers, industrial process-control analog inputs, and reference-voltage buffering for precision DACs. The 8-SOIC package is footprint-compatible with industry-standard dual op-amps, simplifying board reuse in legacy designs.
When designing with the LT1001CD, take care to provide adequate supply decoupling (100 nF ceramic close to each supply pin) and route sensitive bias-current paths to avoid leakage. Optional pins 1 and 8 support external offset nulling via a 10 kOhm potentiometer; if unused, leave them open. The input common-mode range extends to the negative supply, making true ground sensing possible on a single rail.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. The information is anchored to the official Analog Devices LT1001 datasheet and cross-checked against Rochester Electronics, DigiKey, and JAK Electronics stock data as of 2026-10-22.
Drop-in alternatives for LT1001CD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LT1001CD (same form factor and footprint) — differing in Amplifier Type, Number of Channels, Operating Temperature Range, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LT1001CS8
✅ Drop-In📋 Reference alternative (not in catalog)
LT1001CDR
✅ Drop-In📋 Reference alternative (not in catalog)
OP07CDR
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →OP27GSZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD8628AUJZ
✅ Drop-In📋 Reference alternative (not in catalog)
OPA277UA
✅ Drop-In📋 Reference alternative (not in catalog)
LT1001CD Maximum Ratings & Electrical Characteristics
| Manufacturer | Texas Instruments |
| Part Number | LT1001CD |
| Amplifier Type | Precision Operational Amplifier |
| Number of Channels | 1 |
| Input Offset Voltage (Max) | 110 uV |
| Input Bias Current (Max) | 4 nA |
| Unity-Gain Bandwidth | 0.8 MHz |
| Open-Loop Gain (Min) | 102 dB |
| Offset Voltage Drift (Typ) | 0.3 uV/C |
| Supply Voltage Range | +/-3 V to +/-18 V dual, 6 V to 36 V single |
| Slew Rate (Typ) | 0.25 V/us |
| Operating Temperature Range | 0C to +70C (C grade) |
| Package | 8-SOIC (D), 3.90 mm body width |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
LT1001CD Pin Configuration
| Pin 1 | OFFSET NULL — Optional offset trim, leave open if unused |
| Pin 2 | IN- — Inverting input |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | OUT — Amplifier output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | OFFSET NULL — Optional offset trim, leave open if unused |
Typical Applications
LT1001CD is suitable for 7 applications: Precision Weigh-Scale Amplifier, Thermocouple Signal Conditioning, 16-bit SAR ADC Input Buffer, Industrial Process Control Analog Input, Strain-Gauge Bridge Amplifier, Precision Voltage Reference Buffer, Medical Instrumentation Front End.
Precision Weigh-Scale Amplifier
The LT1001CD fits weigh-scale signal conditioning because its 110 uV max offset and 0.3 uV/C typ drift keep total error well below the 0.01% resolution of a 24-bit load-cell ADC. Connected as a classic three-amp instrumentation front end with a 350-ohm bridge excited at 10 V, the LT1001CD's 4 nA max bias current contributes less than 1.4 uV of error per microampere of source resistance. The 102 dB open-loop gain preserves linearity across the full ADC input range. Unlike chopper-stabilized alternatives, the LT1001CD introduces no switching noise that would alias into the ADC output.
Recommended
Thermocouple Signal Conditioning
The LT1001CD is well suited to thermocouple and RTD signal conditioning front ends because of its low bias current (4 nA max) and stable drift over the 0C-70C commercial range. Configured as a low-side current source driving a PT100 RTD with a differential gain stage, the LT1001CD's high common-mode rejection rejects supply noise and 50/60 Hz pickup on long sensor leads. The 6V-36V supply range accommodates 12V and 24V industrial rails. Designers should add a precision reference such as the LT1019 for cold-junction compensation to maintain 0.1C measurement accuracy.
Recommended
16-bit SAR ADC Input Buffer
The LT1001CD buffers 16-bit SAR ADC inputs in precision data acquisition because its low offset and 0.8 MHz bandwidth settle within 1 LSB (76 uV at 5V full scale) of a 16-bit conversion in under 4 microseconds. With 0.25 V/us slew rate and unity-gain stability, the part can drive the ADC's switched-capacitor input without ringing when combined with a 100 ohm series resistor. The 8-SOIC package is footprint-compatible with industry-standard dual op-amps. For higher-resolution 18-bit/20-bit ADCs, upgrade to the AD8628 zero-drift variant for sub-microvolt accuracy.
Recommended
Industrial Process Control Analog Input
The LT1001CD excels in 4-20 mA current loop and 0-10V analog input modules for PLC and DCS systems because it operates from +/-15V industrial supplies, handles the full +/-12V common-mode range of a typical signal, and survives the 24V over-voltage transient protection typically required. Its 110 uV max offset contributes less than 0.005% error on a 10V full-scale range, meeting the 0.1% accuracy class of industrial instrumentation. The commercial temperature range suits indoor control panels, while the LT1001MD variant covers outdoor or extended-temperature installations.
Recommended
Strain-Gauge Bridge Amplifier
The LT1001CD provides precision amplification of strain-gauge bridge outputs in structural-health monitoring and pressure transducer applications because its high open-loop gain (102 dB min) preserves linearity over the full 1-4 mV/V bridge output range. Configured as an instrumentation amplifier with two or three LT1001CDs plus a precision reference, the circuit achieves better than 0.1% full-scale accuracy with sub-microvolt drift. The bipolar input stage supports true differential sensing, rejecting ground-loop noise common in field-installed sensor networks. The 8-SOIC package enables compact PCB layouts.
Recommended
Precision Voltage Reference Buffer
The LT1001CD serves as a low-noise, low-drift buffer for precision voltage references in calibration equipment, digital multimeters, and 16-bit DAC output stages because its unity-gain topology preserves reference accuracy without adding significant error. The 102 dB open-loop gain ensures the output follows the reference within 8 ppm at 5V, and the 4 nA max bias current contributes negligible load error to a typical 5 mA reference. The 6V-36V supply range accommodates both 12V and 15V reference system rails. For sub-ppm buffer performance, upgrade to the AD8628 zero-drift amplifier.
Recommended
Medical Instrumentation Front End
The LT1001CD functions in medical instrumentation signal paths such as ECG, EEG, and blood-pressure monitor front ends because its low noise, low bias current, and stable DC characteristics preserve the integrity of low-amplitude bioelectric signals. Configured as a gain-of-1000 ECG amplifier with high-pass filtering, the LT1001CD's 0.3 uV/C drift maintains baseline stability over the patient's body-temperature range. The 8-SOIC package is footprint-compatible with industry-standard op-amps, simplifying board layouts. For newer designs requiring single-supply 3V operation, choose the AD8628 or OPA2333 rail-to-rail amplifier instead.
Recommended
Recommended Products Summary
Engineering reference data for LT1001CD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LT1001CS8 | LT1001CDR | OP07CDR | OP27GSZ | AD8628AUJZ | OPA277UA |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC (D) | 8-SOIC (S8) - same | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC (S8) - same | 8-SOIC (S8) - same | 8-SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices | Texas Instruments |
| Input Offset Voltage (Max) | 110 uV | 110 uV | 110 uV | 75 uV | 100 uV | 1 uV | 10 uV |
| Unity-Gain Bandwidth | 0.8 MHz | 0.8 MHz | 0.8 MHz | 0.6 MHz | 8 MHz | 2.5 MHz | 1 MHz |
| Input Bias Current (Max) | 4 nA | 4 nA | 4 nA | 7 nA | 80 nA | 200 pA | 1 nA |
| Supply Voltage Range | 6 V to 36 V | 6 V to 36 V | 6 V to 36 V | 6 V to 36 V | 6 V to 36 V | 5 V to 16 V | 4 V to 36 V |
| Slew Rate (Typ) | 0.25 V/us | 0.25 V/us | 0.25 V/us | 0.3 V/us | 2.8 V/us | 1 V/us | 0.8 V/us |
| Operating Temperature Range | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C | -40C to +125C | -40C to +85C |
| Approx. Unit Price (qty 1) | $1.91 | ~$1.91 | ~$1.91 | ~$1.50 | ~$3.20 | ~$3.00 | ~$1.80 |
Key Differentiators
- Tighter bias current than OP-07 (vs OP07CDR)
- Sub-microvolt offset achievable with AD8628 (vs AD8628AUJZ)
- Pin-compatible with industry-standard OP-07/OP-27 (vs OP27GSZ)
Design Notes
Decouple each supply pin (V+ and V-) with a 100 nF X7R ceramic capacitor placed within 5 mm of the IC. For dual-supply operation from +/-15V, add a 10 uF tantalum or aluminum-polymer bulk capacitor near the LT1001CD. According to the Analog Devices LT1001 datasheet, inadequate supply decoupling can couple switching noise from digital circuits into the precision op-amp output through the supply pins, degrading AC performance in mixed-signal designs.
Route sensitive bias-current paths away from leakage sources. Use guard rings driven by the same potential around high-impedance input nodes on the PCB. The 4 nA max input bias current of the LT1001CD can produce 4 uV of error per 1 kOhm of source resistance, so PCB leakage below 1 GOhm is essential for sub-100 uV accuracy. According to the datasheet, the input stage is bipolar and tolerates source resistances up to 10 kOhm without significant degradation, but careful layout maximizes DC accuracy.
Do not leave pins 1 and 8 floating if the optional offset null function is not used; leave them open per datasheet. Estimated: connecting them to V+ or V- will inject bias current into the input stage and increase offset voltage by 100-500 uV. For unity-gain buffer applications, the input common-mode range extends to the negative supply (ground on single-supply rails), but never to V+; the input must remain 1.5V below V+ to avoid saturation. For 5V single-supply operation, choose a rail-to-rail op-amp such as OPA2333 instead of the LT1001CD, which requires a minimum 6V supply.
Compliance Information
RoHS compliant per TI/ADI product documentation. C-grade commercial temperature range (0C to +70C) - not AEC-Q100 qualified; for automotive applications use the LT1001MD or AD8628 automotive-grade variants.
