OPA4488 - Quad 48V 14MHz Zero-Drift Op Amp | TI
部品番号: OPA4488 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
OPA4488 概要
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in signal conditioning, filtering, and mathematical operations. The OPA4488 belongs to the precision op amp category, which prioritizes low offset voltage, low drift, and low noise for accurate signal processing. As a zero-drift amplifier, it uses chopper stabilization to continuously correct offset and drift, achieving near-zero offset voltage and minimal temperature-induced error.
Key features of the OPA4488 include a low quiescent current of 1.5mA per amplifier, a wide bandwidth of 14MHz, and a low noise density of . The zero-drift architecture provides an offset voltage of and a drift of , making it ideal for precision applications. The mux-friendly input stage allows the amplifier to settle quickly after being switched from a multiplexer, reducing errors in multi-channel data acquisition systems.
The OPA4488 is designed with a CMOS input stage, providing high input impedance and low bias current, which is beneficial for interfacing with high-impedance sensors. The rail-to-rail output stage allows the output to swing close to the supply rails, maximizing dynamic range in single-supply applications. The device also includes internal ESD protection and is specified over the -40°C to 125°C temperature range.
Typical applications include precision data acquisition, industrial process control, test and measurement equipment, and automotive sensor interfaces. The wide supply voltage range and high bandwidth make it suitable for driving ADCs, buffering reference voltages, and conditioning signals in harsh environments. The low quiescent current is advantageous for battery-powered and power-sensitive designs.
When designing with the OPA4488, ensure proper power supply decoupling with 0.1uF ceramic capacitors close to the supply pins. The zero-drift architecture may introduce a small amount of chopper noise, which can be filtered if necessary. For best performance, use a solid ground plane and minimize parasitic capacitance on the input nodes.
ドロップイン代替品: OPA4488 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: OPA4488 （同一形状・フットプリント） — 相違点: Supply Voltage Range, Gain Bandwidth Product, Input Bias Current, Input Offset Voltage, Number of Channels.
クイック比較ツール — 並列比較する代替部品を選択:
OPA4488DR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA4488PWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD8676ARZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.25 / 個
データシートを見る →OPA4170AQPWRQ1
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.98 / 個
データシートを見る →OPA4488 最大定格＆電気的特性
| Number of Channels | 4 |
| Supply Voltage Range | 4.5 V to 48 V |
| Absolute Maximum Supply Voltage | 60 V |
| Gain Bandwidth Product | 14 MHz |
| Quiescent Current per Channel | 1.5 mA |
| Input Type | CMOS |
| 出力タイプ | Rail-to-Rail |
| 動作温度範囲 | -40°C to 125°C |
| Package Options | 14-SOIC (DR), 14-TSSOP (PW) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
OPA4488 ピン構成
| ピン 1 | OUT A — Output of amplifier A |
| ピン 2 | IN A- — Inverting input of amplifier A |
| ピン 3 | IN A+ — Non-inverting input of amplifier A |
| ピン 4 | V+ — Positive supply |
| ピン 5 | IN B+ — Non-inverting input of amplifier B |
| ピン 6 | IN B- — Inverting input of amplifier B |
| ピン 7 | OUT B — Output of amplifier B |
| ピン 8 | OUT C — Output of amplifier C |
| ピン 9 | IN C- — Inverting input of amplifier C |
| ピン 10 | IN C+ — Non-inverting input of amplifier C |
| ピン 11 | V- — Negative supply |
| ピン 12 | IN D+ — Non-inverting input of amplifier D |
| ピン 13 | IN D- — Inverting input of amplifier D |
| ピン 14 | OUT D — Output of amplifier D |
主な用途
OPA4488 の用途: 6 件s: Precision Data Acquisition, Industrial Process Control, Automotive Sensor Interfaces, Test and Measurement Equipment, Medical Instrumentation, Battery-Powered IoT Devices.
Precision Data Acquisition
The OPA4488's zero-drift architecture and 14MHz bandwidth make it ideal for precision data acquisition systems. It provides accurate signal conditioning for sensors and transducers, with low offset and drift ensuring measurement accuracy over time and temperature. The wide supply voltage range allows direct interfacing with 24V industrial sensors. In a typical DAQ front-end, the OPA4488 buffers and amplifies sensor signals before the ADC, maintaining signal integrity with its low noise and high input impedance. The mux-friendly input stage enables fast settling when multiplexing multiple channels, reducing crosstalk and improving throughput. For best performance, use a low-pass filter at the output to limit noise bandwidth.
おすすめ
Industrial Process Control
In industrial process control, the OPA4488 provides reliable signal conditioning for pressure, temperature, and flow sensors. Its 48V supply capability allows it to operate directly from 24V or 48V industrial power rails, simplifying power supply design. The zero-drift performance ensures long-term stability in harsh environments, reducing calibration frequency. The wide operating temperature range (-40°C to 125°C) makes it suitable for factory floor and outdoor installations. The OPA4488 can be used in 4-20mA current loop transmitters, where its low offset and drift maintain loop accuracy. Its high bandwidth supports fast control loops, while the rail-to-rail output maximizes dynamic range. For EMC robustness, add input filtering and proper grounding.
おすすめ
Automotive Sensor Interfaces
The OPA4488 is well-suited for automotive sensor interfaces, such as battery monitoring, motor control, and exhaust gas sensing. Its 48V operating voltage and 60V absolute maximum rating handle load dump transients and other automotive electrical disturbances. The zero-drift architecture ensures accurate measurement of small sensor signals over the vehicle's operating life. The wide temperature range (-40°C to 125°C) meets automotive requirements. In battery monitoring, the OPA4488 can amplify shunt voltages with high precision, enabling accurate state-of-charge estimation. For motor control, its 14MHz bandwidth supports fast current sensing loops. The mux-friendly input allows multiplexing multiple sensors, reducing component count. Use proper ESD protection and filtering for automotive EMC compliance.
おすすめ
Test and Measurement Equipment
The OPA4488 is ideal for test and measurement equipment, such as oscilloscopes, multimeters, and signal generators. Its high bandwidth (14MHz) and low noise enable accurate signal amplification and conditioning. The zero-drift performance ensures stable measurements over time and temperature, critical for calibration instruments. The wide supply voltage range allows operation from various power rails. In an oscilloscope front-end, the OPA4488 can buffer and amplify input signals with minimal distortion. Its rail-to-rail output maximizes the dynamic range of the ADC. The mux-friendly input is beneficial for multi-channel instruments that switch between inputs. For high-impedance probes, the CMOS input provides low loading. Use precision resistors for gain setting to maintain accuracy.
おすすめ
Medical Instrumentation
The OPA4488 is suitable for medical instrumentation, including patient monitoring, diagnostic equipment, and wearable devices. Its low quiescent current (1.5mA per channel) is ideal for battery-powered devices, extending battery life. The zero-drift architecture ensures accurate measurement of biopotential signals, such as ECG and EEG, which are in the microvolt range. The wide supply voltage range allows operation from a variety of battery configurations. The high input impedance of the CMOS input minimizes loading on electrodes. The rail-to-rail output provides good dynamic range for ADC interfacing. For safety, ensure proper isolation and compliance with medical standards. The OPA4488's small package options (SOIC-14, TSSOP-14) are suitable for compact designs.
おすすめ
Battery-Powered IoT Devices
The OPA4488 is well-suited for battery-powered IoT devices, such as wireless sensors and smart meters. Its low quiescent current (1.5mA per channel) helps extend battery life, while the wide supply voltage range (4.5V to 48V) accommodates various battery chemistries and configurations. The zero-drift performance ensures accurate sensor readings over the device's lifetime, reducing maintenance. The small package options (SOIC-14, TSSOP-14) are ideal for space-constrained designs. In a typical IoT sensor node, the OPA4488 conditions signals from temperature, humidity, or pressure sensors before the ADC. Its high input impedance minimizes sensor loading, and the rail-to-rail output maximizes ADC dynamic range. For power optimization, use the enable pin if available (check datasheet) to shut down the amplifier when not in use.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: OPA4488 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | OPA4488DR | OPA4488PWR | AD8676ARZ | OPA4170-Q1 |
|---|---|---|---|---|---|
| Package | 14-SOIC (DR), 14-TSSOP (PW) | 14-SOIC | 14-TSSOP | 14-SOIC | 14-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments |
| Number of Channels | 4 | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 4.5V to 48V | 4.5V to 48V | 4.5V to 48V | 5V to 36V | 2.7V to 36V |
| Gain Bandwidth Product | 14 MHz | 14 MHz | 14 MHz | 10 MHz | 3 MHz |
| Quiescent Current per Channel | 1.5 mA | 1.5 mA | 1.5 mA | 1.2 mA | 0.5 mA |
| Zero-Drift | Yes | Yes | Yes | Yes | No |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
主な差別化要因
- Wide supply voltage range up to 48V （vs OPA4170-Q1)
- Zero-drift architecture （vs OPA4170-Q1)
- Higher bandwidth of 14MHz （vs AD8676ARZ)
設計ノート
The OPA4488 operates from 4.5V to 48V, with an absolute maximum of 60V. Ensure the supply voltage does not exceed 48V under normal operation and that transients stay below 60V. Use proper decoupling capacitors (0.1uF and 10uF) close to the V+ and V- pins to maintain stability and reduce noise. For single-supply operation, connect V- to ground and ensure the input common-mode range is respected.
For optimal performance, place the OPA4488 on a PCB with a solid ground plane. Keep input traces short and shielded to minimize parasitic capacitance and noise pickup. Use a 0.1uF ceramic capacitor for power supply decoupling, placed as close as possible to the supply pins. For high-impedance inputs, consider a guard ring around the input pins to reduce leakage currents.
The zero-drift architecture may introduce chopper noise at the switching frequency. If this is problematic, add a low-pass filter at the output to attenuate high-frequency noise. Also, avoid exceeding the input common-mode range, as this can cause phase reversal. Ensure the output can drive the load capacitance; if driving large capacitive loads, add a series resistor to maintain stability.
コンプライアンス情報
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider OPA4170-Q1 which is AEC-Q100 qualified.
