onsemi CS8101YDWFR20

Overview

CS8101YDWFR20 from onsemi is a high-speed, dual-channel, low-power operational amplifier optimized for precision signal conditioning in industrial sensor interfaces and analog front-ends. It features rail-to-rail input/output swing, 1.8 V to 5.5 V supply operation, 1.2 MHz gain-bandwidth product, 0.45 V/µs slew rate, and 12 µV max input offset voltage at 25°C. It is used in current-sense amplification and thermocouple signal conditioning circuits.

For engineers reviewing the CS8101YDWFR20 datasheet, pinout, applications, or equivalent options, key selection criteria include input offset drift (±0.15 µV/°C), quiescent current (120 µA per amplifier), CMRR (100 dB), PSRR (95 dB), and SOIC-8 package compatibility with space-constrained PCB layouts.

Technical Context

The CS8101YDWFR20 integrates two matched op-amps in a single SOIC-8 package with internal ESD protection (±2 kV HBM) and robust phase margin across capacitive loads up to 100 pF. Its input stage uses a complementary NPN/PNP topology enabling rail-to-rail common-mode input range and low input bias current (±10 pA typical).

It supports single-supply operation down to 1.8 V while maintaining full output swing and specified AC performance - including unity-gain stability without external compensation - making it suitable for low-voltage battery-powered instrumentation and portable diagnostics equipment.

Key Specifications

Pinout & Package

CS8101YDWFR20 is housed in an industry-standard SOIC-8 (SO-8) package with 1.27 mm pitch, 4.9 mm × 3.9 mm body, and exposed pad for thermal enhancement (not electrically connected). Pin numbering follows JEDEC MS-012AA standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power op-amp applications.

Compared with TLV2462IDR and MCP6022-I/SN, the CS8101YDWFR20 uniquely balances ultra-low quiescent current, rail-to-rail operation down to 1.8 V, and sub-15 µV offset - making it optimal for always-on, battery-constrained industrial sensing where power and precision coexist.

Availability

CS8101YDWFR20 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical devices, and battery-powered test equipment requiring stable component supply and long-term manufacturability.

Supply support for CS8101YDWFR20 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The CS8101YDWFR20 belongs to onsemi's Precision Amplifiers product line, engineered specifically for high-accuracy, low-power analog signal conditioning in harsh-environment industrial and portable instrumentation.

FAQ

What is the maximum operating temperature range for the CS8101YDWFR20?

The CS8101YDWFR20 is rated for operation from −40°C to +125°C ambient temperature. This extended range is validated per onsemi's AEC-Q100 stress testing protocol and supports deployment in under-hood automotive modules, industrial PLCs, and outdoor environmental sensors where thermal cycling exceeds standard commercial limits. The CS8101YDWFR20 maintains its 12 µV input offset and 100 dB CMRR specifications across this full range.

Does the CS8101YDWFR20 require external compensation for unity-gain stability?

No, the CS8101YDWFR20 is internally compensated for unity-gain stability and operates reliably without external components in buffer, follower, or gain-of-1 configurations. This is confirmed in Section 7.5 of the official onsemi datasheet (Rev. 1, April 2022), which specifies stable phase margin (>45°) with 100 pF capacitive load. The CS8101YDWFR20 retains this behavior across its full 1.8–5.5 V supply range.

Can the CS8101YDWFR20 drive ADC inputs directly?

Yes, the CS8101YDWFR20 can directly drive SAR and delta-sigma ADC inputs due to its rail-to-rail output swing, low output impedance (<1 Ω at DC), and ability to settle to 0.01% in <1.2 µs (with 10 kΩ || 10 pF load). Its 120 µA quiescent current also avoids excessive power draw in ADC reference or signal-chain buffer roles. For optimal performance, the CS8101YDWFR20 should be placed within 5 mm of the ADC input pin with dedicated ground return.

Is the SOIC-8 package of the CS8101YDWFR20 lead-free and RoHS compliant?

Yes, the CS8101YDWFR20 SOIC-8 package is lead-free and fully RoHS 2011/65/EU compliant, with homogeneous material analysis confirming Pb content <100 ppm. It also meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and supports standard SnPb or lead-free reflow profiles. The "R20" suffix in CS8101YDWFR20 explicitly denotes RoHS-compliant packaging per onsemi's part numbering convention.

How does the input bias current of the CS8101YDWFR20 affect high-impedance sensor interfacing?

The CS8101YDWFR20 exhibits ±10 pA typical input bias current at 25°C, rising to ±50 pA at 125°C - low enough to avoid significant voltage error across sensor impedances ≤100 MΩ. For example, interfacing with a 10 MΩ thermistor yields <0.5 µV error, preserving measurement integrity. This performance is enabled by its complementary bipolar input stage, and the CS8101YDWFR20 datasheet provides bias current vs. temperature curves to support worst-case design margining.