RS8052XM 100kHz, 670nA, Non-Unity Gain, Rail-to-Rail I/O CMOS Operational Amplifier

RS8052XM vs. MCP6422 / TLV2379 / OPA2379: Precision Dual Op-Amp Comparison

The RS8052XM is a dual-channel CMOS operational amplifier tailored for high-accuracy, low-power analog signal processing. With a focus on precision, ultra-low bias current, and excellent bandwidth-to-power ratio, the RS8052XM is ideal for battery-powered instrumentation, sensor interfaces, and precision analog front ends. This document provides a technical comparison of the RS8052XM against established competitors such as Microchip’s MCP6422/MCP6142 and Texas Instruments’ TLV2379 and OPA2379.

1. Input Offset Voltage (Vos)

• RS8052XM: ±25 μV (typical), ±100 μV (max)

• MCP6422: ±150 μV (typ), ±500 μV (max)

• MCP6142: ±3 mV (typ)

• TLV2379: ±1.5 mV (typ)

• OPA2379: ±150 μV (typ), ±300 μV (max)

✅ Advantage: RS8052XM significantly outperforms all listed competitors in offset voltage, enabling greater precision with minimal system-level calibration.

2. Input Bias Current

• RS8052XM: 0.2 pA (typical)

• MCP6422: 1 pA

• MCP6142: 1 pA

• TLV2379 / OPA2379: 1 pA – 2 pA (typical)

✅ Advantage: RS8052XM’s ultra-low input bias current provides enhanced accuracy when used with high-impedance sources such as photodiodes, thermistors, or capacitive sensors.

3. Gain Bandwidth Product (GBP)

• RS8052XM: 2.5 MHz

• MCP6422: 550 kHz

• MCP6142: 100 kHz

• TLV2379: 2.4 MHz

• OPA2379: 2 MHz

✅ Advantage: RS8052XM offers leading bandwidth within its power class, ideal for fast-settling signal conditioning or ADC buffer stages.

4. Quiescent Current

• RS8052XM: ~280 μA per channel

• MCP6422: 450 μA (total)

• MCP6142: 45 μA (total)

• TLV2379: 750 μA (typical total)

• OPA2379: 750 μA (typical total)

✅ Advantage: RS8052XM strikes an excellent balance of bandwidth and power, providing faster operation than ultra-low-power devices (like MCP6142), and better power efficiency than TLV2379 and OPA2379.

5. Noise Performance

• RS8052XM: 25 nV/√Hz

• MCP6422: 22 nV/√Hz

• MCP6142: 35 nV/√Hz

• TLV2379: 35 nV/√Hz

• OPA2379: 19 nV/√Hz

⚖️ Comparison: While OPA2379 has a slightly lower noise floor, RS8052XM delivers a strong balance between low noise and significantly better Vos and bias current, making it better suited for ultra-precise, low-drift signal chains.

6. Rail-to-Rail Input and Output

• RS8052XM: Rail-to-rail input and output

• All competitors: Rail-to-rail I/O supported

⚖️ Comparison: All parts offer rail-to-rail capability; RS8052XM ensures strong linear output drive close to supply rails, particularly beneficial in low-voltage applications (e.g., 1.8V–5V systems).

✅ Specification Summary

🔧 Recommended Applications for RS8052XM

• Low-drift instrumentation amplifiers

• Thermocouple and RTD signal conditioning

• Battery-powered medical and industrial sensors

• High-resolution ADC buffering

• Portable, low-noise acquisition systems

🎯 Why Choose RS8052XM?

The RS8052XM combines best-in-class offset voltage, ultra-low input bias current, and high bandwidth in a compact dual-channel device. It bridges the gap between high-precision and low-power design, offering a performance upgrade path over both cost-sensitive and mainstream op-amps.

Whether you're replacing the MCP6422 in a medical sensor or enhancing performance over the TLV2379 in an industrial controller, RS8052XM is the drop-in-ready, performance-optimized solution.