OP177GSZ - Ultraprecision Op Amp | Analog Devices | 8-SOIC
MPN： OP177GSZ ✓ 啟用中OP177GSZ 概覽
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block in analog signal processing, used in configurations like inverting, non-inverting, and differential amplifiers. Op amps are part of the broader category of linear integrated circuits, which also includes comparators and voltage regulators. The OP177GSZ is a general-purpose precision op amp, designed for applications requiring excellent DC accuracy.
Key features of the OP177GSZ include a maximum input offset voltage of 60 µV, a temperature drift of 0.3 µV/°C, and a low input bias current of 2.8 nA. It operates from a supply voltage range of ±3 V to ±18 V and offers a gain bandwidth product of 600 kHz. The device also features a high open-loop gain of 120 dB and a common-mode rejection ratio of 120 dB, ensuring accurate performance in demanding circuits.
The OP177GSZ uses a bipolar input stage, which provides low noise and low offset. Its architecture is optimized for precision DC applications, with a slew rate of 0.3 V/µs and a settling time of 2.8 µs to 0.01%. The device is fully specified over the industrial temperature range of -40°C to +85°C, making it suitable for a wide range of environments.
Typical applications include precision instrumentation, thermocouple amplifiers, strain gauge amplifiers, and active filters. Its low offset and drift make it ideal for bridge amplifiers and data acquisition systems where accuracy is critical. The OP177GSZ is also used in medical instrumentation and industrial process control.
When designing with the OP177GSZ, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The input common-mode voltage range should be respected to avoid output phase reversal. For best performance, use precision resistors in the feedback network to maintain overall accuracy.
直接替換替代品，適用於 OP177GSZ — 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： OP177GSZ （相同外形與佔位） — 差異在於 Amplifier Type, Gain Bandwidth Product, Slew Rate, Input Bias Current, Input Offset Voltage.
OP2177ARZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →OP07CSZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OP177GSZ 最大額定值與電氣特性
| Amplifier Type | General Purpose |
| Number of Circuits | 1 |
| 輸出類型 | Single-ended |
| Slew Rate | 0.3 V/µs |
| Gain Bandwidth Product | 600 kHz |
| Input Offset Voltage | 60 µV (max) |
| Input Bias Current | 2.8 nA (max) |
| Supply Voltage Range | ±3 V to ±18 V |
| Open-Loop Gain | 120 dB |
| Common-Mode Rejection Ratio | 120 dB |
| Power Supply Rejection Ratio | 120 dB |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 8-SOIC |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
OP177GSZ 腳位配置
| 腳位 1 | OFFSET NULL — Offset null adjustment |
| 腳位 2 | IN- — Inverting input |
| 腳位 3 | IN+ — Non-inverting input |
| 腳位 4 | V- — Negative supply |
| 腳位 5 | OFFSET NULL — Offset null adjustment |
| 腳位 6 | OUT — Output |
| 腳位 7 | V+ — Positive supply |
| 腳位 8 | NC — No connection |
典型應用
OP177GSZ 適用於 6 應用s: Precision Instrumentation, Thermocouple Amplifier, Strain Gauge Amplifier, Active Filters, Medical Instrumentation, Industrial Process Control.
Precision Instrumentation
The OP177GSZ's low offset voltage (60 µV max) and low drift (0.3 µV/°C) make it ideal for precision instrumentation amplifiers. In a typical bridge amplifier configuration, the OP177GSZ amplifies small differential signals from strain gauges or thermocouples with high accuracy. Its high CMRR of 120 dB rejects common-mode noise, ensuring clean signal acquisition. The device operates from ±3 V to ±18 V, allowing use in both battery-powered and industrial systems. For best performance, use precision resistors in the feedback network to maintain overall accuracy.
推薦
Thermocouple Amplifier
The OP177GSZ is well-suited for thermocouple signal conditioning due to its low input bias current (2.8 nA) and low offset voltage. In a cold-junction compensated thermocouple circuit, the OP177GSZ amplifies the small thermoelectric voltage (typically tens of microvolts per degree) with minimal error. Its low drift ensures stable readings over temperature. The device's wide supply range accommodates both 5V and ±15V systems. For cold-junction compensation, use a precision temperature sensor like the AD7314. The OP177GSZ's low noise (not specified but typical for bipolar) helps maintain signal integrity.
推薦
Strain Gauge Amplifier
In strain gauge applications, the OP177GSZ provides the precision needed to measure tiny resistance changes. Its low offset voltage and drift minimize errors in the bridge output. The high open-loop gain of 120 dB ensures linear amplification. The OP177GSZ can be used in a differential amplifier configuration with four active gauges. Its common-mode rejection of 120 dB rejects noise from the excitation supply. For a complete solution, pair with a precision ADC like the AD7793. The device's bipolar input stage offers low noise, essential for high-resolution measurements.
推薦
Active Filters
The OP177GSZ's gain bandwidth product of 600 kHz makes it suitable for low-frequency active filters, such as low-pass filters in data acquisition systems. Its low offset and drift ensure accurate DC performance in the passband. In a Sallen-Key topology, the OP177GSZ provides stable gain and low distortion. The device's high open-loop gain maintains filter accuracy. For higher-order filters, multiple OP177GSZ stages can be cascaded. The 8-SOIC package allows compact PCB layouts. Use precision resistors and capacitors to achieve the desired cutoff frequency and Q factor.
推薦
Medical Instrumentation
The OP177GSZ is used in medical devices such as ECG and EEG amplifiers, where precision and low noise are critical. Its low offset voltage and drift ensure accurate biopotential measurements. The device's high CMRR rejects 50/60 Hz interference. The OP177GSZ operates from low supply voltages, making it suitable for battery-powered portable monitors. Its small 8-SOIC package is ideal for space-constrained designs. For safety, ensure proper isolation and use medical-grade power supplies. The OP177GSZ's reliability and long-term stability make it a trusted choice in medical electronics.
推薦
Industrial Process Control
In industrial process control, the OP177GSZ provides accurate signal conditioning for sensors like pressure transmitters and flow meters. Its wide supply range (±3 V to ±18 V) allows integration into 24V industrial systems. The low offset and drift ensure precise control loop feedback. The device's high open-loop gain and CMRR reject noise from motors and power lines. The OP177GSZ can be used in PID controllers and data acquisition modules. For harsh environments, the industrial temperature range (-40°C to +85°C) ensures reliable operation. Pair with a precision ADC like the AD7793 for digital processing.
推薦
推薦產品摘要
工程參考資料，適用於 OP177GSZ — 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 | OP177GPZ | OP2177ARZ | OP07CSZ | AD8628ARZ | OPA2277UA |
|---|---|---|---|---|---|---|
| Package | 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 |
| Number of Circuits | 1 | 1 | 2 | 1 | 1 | 2 |
| Input Offset Voltage (max) | 60 µV | 60 µV | 50 µV | 150 µV | 5 µV | 50 µV |
| Gain Bandwidth Product | 600 kHz | 600 kHz | 800 kHz | 600 kHz | 2.5 MHz | 800 kHz |
| Supply Voltage Range | ±3 V to ±18 V | ±3 V to ±18 V | ±2.5 V to ±18 V | ±3 V to ±18 V | 2.7 V to 5 V (single) | ±2 V to ±18 V |
| Input Bias Current (max) | 2.8 nA | 2.8 nA | 2 nA | 7 nA | 30 pA | 1 nA |
| CMRR (min) | 120 dB | 120 dB | 120 dB | 110 dB | 130 dB | 120 dB |
主要差異化特點
- Ultraprecision performance at low cost (對比OP07CSZ)
- Pin-compatible with OP07 (對比OP07CSZ)
- Lower noise than chopper amplifiers (對比AD8628ARZ)
設計說明
Decouple the power supply pins with 0.1 µF ceramic capacitors placed as close as possible to the V+ and V- pins. For noisy environments, add a 10 µF tantalum capacitor in parallel. Ensure the supply voltage does not exceed the absolute maximum rating of ±18 V to prevent damage.
For best performance, use a ground plane and keep the input traces short and shielded. Avoid routing high-frequency digital signals near the input pins. Use precision resistors with low temperature coefficient in the feedback network to maintain accuracy.
Do not exceed the input common-mode voltage range, which is typically from V- to V+ minus 2 V. Exceeding this range can cause output phase reversal. Also, ensure the load capacitance is not too high, as it may cause instability. Use a small series resistor if driving capacitive loads.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
