OP177GSZ-REEL7 - Ultraprecision Op Amp | Analog Devices
MPN: OP177GSZ-REEL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
OP177GSZ-REEL7 Overview
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in analog signal conditioning, filtering, and mathematical operations. The OP177 belongs to the precision op amp category, which prioritizes low offset voltage, low drift, and low noise over speed. In the hierarchy of analog ICs, it sits under linear amplifiers, which are fundamental building blocks in instrumentation, control systems, and data acquisition. Precision op amps like the OP177 are essential in applications where small signals must be amplified without introducing significant error.
Key features of the OP177GSZ-REEL7 include a maximum input offset voltage of 25 µV, a typical input bias current of 1.2 nA, and a common-mode rejection ratio of 120 dB. The device also offers a large signal voltage gain of 120 dB and operates over the industrial temperature range of -40°C to +85°C. The SOIC-8 package is widely used and easy to integrate, and the REEL7 suffix indicates tape-and-reel packaging for automated assembly.
Technically, the OP177 uses a bipolar transistor input stage, which provides low noise and low offset. The internal architecture includes a precision bandgap reference and laser-trimmed resistors to achieve the tight specifications. The device is designed for high closed-loop gain applications where accuracy is critical, and its low noise ensures minimal signal degradation. The OP177 is also available in other package options, such as the OP177GPZ in DIP-8, and in automotive and military grades.
Typical applications include precision instrumentation, thermocouple amplifiers, strain gauge signal conditioning, and active filters. In these roles, the OP177's low offset and drift ensure accurate measurement, while its low noise preserves signal integrity. The device is also used in medical devices, industrial process control, and test equipment.
When designing with the OP177, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The input common-mode range extends to within 1.5 V of the supply rails, so avoid exceeding this range to maintain linearity. For best performance, use a ground plane and keep feedback paths short to minimize parasitic capacitance.
Drop-in alternatives for OP177GSZ-REEL7 — 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 OP177GSZ-REEL7 (same form factor and footprint) — differing in Package, Amplifier Type, Operating Temperature Range, RoHS Status, Slew Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
OP177GSZ
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →OP177FSZ-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4077-1ARZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
OPA177GS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
OP07CDR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →OP177GSZ-REEL7 Maximum Ratings & Electrical Characteristics
| Amplifier Type | General Purpose |
| Number of Circuits | 1 |
| Gain Bandwidth Product | 600 kHz |
| Slew Rate | 0.3 V/µs |
| Input Offset Voltage | 25 µV max |
| Input Bias Current | 1.2 nA typ |
| Supply Voltage Range | ±3 V to ±18 V |
| Common Mode Rejection Ratio | 120 dB typ |
| Large Signal Voltage Gain | 120 dB typ |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| MSL Level | 1 (unlimited) |
OP177GSZ-REEL7 Pin Configuration
| Pin 1 | OFFSET NULL — Offset null adjustment |
| Pin 2 | IN- — Inverting input |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | OFFSET NULL — Offset null adjustment |
| Pin 6 | OUT — Output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | NC — No connection |
Typical Applications
OP177GSZ-REEL7 is suitable for 6 applications: Precision Instrumentation, Sensor Signal Conditioning, Active Filters, Medical Devices, Industrial Process Control, Test and Measurement Equipment.
Precision Instrumentation
The OP177GSZ-REEL7's ultralow offset voltage (25 µV max) and drift (0.3 µV/°C) make it ideal for precision instrumentation amplifiers, where accurate measurement of small signals is critical. Its low noise ensures minimal signal degradation, and the wide supply range (up to ±18 V) accommodates various sensor outputs. In a typical thermocouple amplifier, the OP177 provides high gain with low error, maintaining accuracy over temperature. The device's high CMRR (120 dB) rejects common-mode noise, further enhancing measurement precision.
Recommended
Sensor Signal Conditioning
In sensor signal conditioning, the OP177GSZ-REEL7 excels due to its low input bias current (1.2 nA) and low offset, which minimize errors when interfacing with high-impedance sensors like strain gauges and pH probes. The device's low noise preserves the sensor's signal integrity, and its stability over temperature ensures consistent performance. For a load cell amplifier, the OP177 can be configured as a differential amplifier with external resistors, providing precise gain and offset adjustment. The wide supply range allows operation from ±5 V to ±15 V, common in industrial systems.
Recommended
Active Filters
The OP177GSZ-REEL7 is well-suited for active filters, such as low-pass and high-pass filters, due to its 600 kHz gain-bandwidth product and low noise. In a second-order low-pass filter, the OP177 provides accurate frequency response with minimal distortion. Its low offset voltage prevents DC errors from shifting the filter's output, and its high gain ensures sharp cutoff characteristics. The device's bipolar input stage offers low noise, which is crucial in audio and measurement filters. With supply voltages up to ±18 V, the OP177 can handle large signal swings, making it versatile for various filter designs.
Recommended
Medical Devices
In medical devices, such as ECG and EEG amplifiers, the OP177GSZ-REEL7's low offset and low noise are essential for capturing weak biological signals without distortion. The device's high CMRR (120 dB) rejects common-mode interference from the body, improving signal quality. Its low drift ensures stable performance over body temperature variations. The OP177 can be used in the front-end amplification stage, providing high gain with minimal error. The wide supply range allows operation from battery voltages, and the small SOIC-8 package is suitable for compact medical devices.
Recommended
Industrial Process Control
The OP177GSZ-REEL7 is used in industrial process control for conditioning signals from transducers like pressure and temperature sensors. Its precision ensures accurate control loop feedback, and its wide supply range (up to ±18 V) interfaces with 24 V industrial systems. The device's low offset and drift reduce calibration requirements, and its high gain allows direct connection to ADC inputs. In a PID controller, the OP177 can be used in the error amplifier stage, providing stable and accurate error signals. Its robustness over the -40°C to +85°C range suits harsh industrial environments.
Recommended
Test and Measurement Equipment
In test and measurement equipment, such as digital multimeters and data acquisition systems, the OP177GSZ-REEL7 provides the precision needed for accurate readings. Its low offset voltage (25 µV) and low noise ensure that measurements are not corrupted by amplifier errors. The device's high CMRR and PSRR reject power supply noise, maintaining accuracy in noisy environments. The OP177 can be used in buffer amplifiers, integrators, and comparators within the measurement path. Its wide bandwidth (600 kHz) is sufficient for most DC and low-frequency AC measurements, and the SOIC-8 package allows dense PCB layouts.
Recommended
Recommended Products Summary
Engineering reference data for OP177GSZ-REEL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OP177GSZ | OP177GPZ | OP177FSZ-REEL7 | ADA4077-1ARZ | OPA177GS | OP07CDR |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-DIP | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Input Offset Voltage (max) | 25 µV | 25 µV | 25 µV | 10 µV | 15 µV | 25 µV | 75 µV |
| Gain Bandwidth Product | 600 kHz | 600 kHz | 600 kHz | 600 kHz | 4 MHz | 600 kHz | 600 kHz |
| Slew Rate | 0.3 V/µs | 0.3 V/µs | 0.3 V/µs | 0.3 V/µs | 1.2 V/µs | 0.3 V/µs | 0.3 V/µs |
| Supply Voltage Range | ±3 V to ±18 V | ±3 V to ±18 V | ±3 V to ±18 V | ±3 V to ±18 V | ±2.5 V to ±18 V | ±3 V to ±18 V | ±3 V to ±18 V |
| Input Bias Current | 1.2 nA | 1.2 nA | 1.2 nA | 1.2 nA | 0.5 nA | 1.2 nA | 1.8 nA |
| CMRR (min) | 120 dB | 120 dB | 120 dB | 120 dB | 120 dB | 120 dB | 110 dB |
Key Differentiators
- Ultralow offset voltage of 25 µV max (vs OP07CDR)
- Low offset drift of 0.3 µV/°C (vs OP07CDR)
- Higher bandwidth than older precision op amps (vs OP07CDR)
Design Notes
Ensure proper power supply decoupling. Place 0.1 µF ceramic capacitors close to the V+ and V- pins (pins 7 and 4) to filter high-frequency noise. For best performance, use a 10 µF tantalum capacitor in parallel for low-frequency stability. The OP177 operates from ±3 V to ±18 V, so verify the supply rails are within this range and well-regulated.
Use a ground plane to minimize noise and parasitic inductance. Keep the feedback network components close to the inverting input (pin 2) to reduce stray capacitance. For high-impedance sensor applications, guard the input traces to prevent leakage currents. The SOIC-8 package has a thermal pad? No, it does not, so ensure adequate copper area for heat dissipation if operating at high supply voltages.
Do not exceed the input common-mode voltage range, which extends to within 1.5 V of the supply rails. Exceeding this range can cause phase reversal and output saturation. Also, avoid leaving the offset null pins (pins 1 and 5) floating; connect them to a potentiometer if nulling is required, or tie them together if not used. The OP177 is not unity-gain stable? Actually, it is stable for gains of 1 or higher, but verify stability with capacitive loads.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider OP177GPZ? No, it's not qualified either. Check with manufacturer for specific compliance details.
