مدار مجتمع (آی سی) آی‌سی خطی (آنالوگ) تقویت‌کننده (آپ‌امپ)

Product Attributes

Introduction

CM4141/CM4142 are single-channel/dual-channel high-precision, wide-bandwidth, zero-drift chopper amplifiers operating from a 2.7V–5V single supply. Using a proprietary topology, they simplify peripheral circuit design, reduce cost, and suppress the high switching noise typical of conventional chopper amplifiers.

The CM4141/CM4142 feature a typical offset voltage of only 0.5μV, offset voltage drift below 0.03μV/°C, and noise of just 0.15μVₚ₋ₚ (0.1Hz–10Hz), introducing minimal error into the system and making them suitable for a wide range of high-precision applications. Near-zero temperature drift across the operating temperature range benefits applications such as pressure and position sensors, medical instruments, and strain gauge amplifiers. Rail-to-rail input and output swing reduces input biasing complexity and optimizes system SNR performance.

The CM4141 is available in SOT23-5 and SOP8 packages; the CM4142 is available in SOP8 and MSOP8 packages. The operating temperature range is −40°C to 125°C.

The CM4141/CM4142 are ultra-high-precision rail-to-rail input/output op-amps with single-supply operation. With a typical offset voltage of only 0.5μV, output saturation is not a concern even at high gain configurations. Near-zero temperature drift ensures minimal offset voltage error across the full temperature range, making them ideal for sensitive measurement applications.

The CM4141/CM4142 achieve high precision through auto-zero and chopping techniques. The unique topology maintains low offset voltage over wide temperature ranges and long service life. Low-frequency noise and reduced noise energy at the chopping frequency maximize application SNR without additional filtering. Within the 60kHz internal clock frequency, a flat equivalent input noise spectral density of 9nV/√Hz is maintained, simplifying downstream filter design requirements.

The CM4141/CM4142 exhibit low noise across a wide bandwidth from 0.1Hz to 10kHz, making them suitable for applications requiring high DC accuracy. In systems with signal bandwidths of 5kHz to 10kHz, they deliver true 16-bit accuracy, making them the optimal choice for high-resolution systems.

The CM4141/CM4142 eliminate 1/f noise internally, greatly reducing output error.

Features

• 5V single-supply operation
• Low-noise auto-zero amplifier
• Low offset voltage: 0.5μV typical (5V)
• Offset voltage drift: < 0.03μV/℃
• Rail-to-rail input and output swing
• High gain, high CMRR, and high PSRR: > 130dB
• Ultra-low input bias current: 100pA maximum
• Low power consumption: 900μA typical
• Overload recovery time: 130μs typical (5V)
• SOP8 4.9mm × 3.9mm, SOT23-5 2.9mm × 1.6mm packages (CM4141)
• SOP8 4.9mm × 3.9mm, MSOP8 3mm × 3mm packages (CM4142)

Applications

• Automotive sensors
• Pressure and position sensors
• Strain gauge amplifiers
• Medical instrumentation
• Thermocouple amplifiers
• Precision current sensing
• Photodiode amplifiers