Microchip Technology MCP6472T-E/MSVAO

Overview

MCP6472T-E/MSVAO from Microchip Technology is a dual-channel, rail-to-rail input/output operational amplifier optimized for precision, low-leakage signal conditioning in battery-powered and high-impedance sensor interfaces. It delivers 2 MHz gain bandwidth, 1.1 V/µs slew rate, ±1.5 mV max input offset voltage, 100 µA/amplifier quiescent current (typical), and operates from 2.0V to 5.5V supply across –40°C to +125°C. It is widely used in photodiode amplifiers and pH electrode front-ends where ultra-low input bias current (150 pA at +125°C) is critical.

For engineers reviewing the MCP6472T-E/MSVAO datasheet, MCP6472T-E/MSVAO pinout, MCP6472T-E/MSVAO application, or MCP6472T-E/MSVAO equivalent, key selection criteria include verified input bias current performance at elevated temperature, rail-to-rail output swing under light load (e.g., 10 kΩ), CMRR/PSRR stability over full common-mode range, and MSOP-8 package thermal resistance (θ_JA = 211°C/W) for compact industrial designs.

Technical Context

The MCP6472T-E/MSVAO employs a dual-input-stage CMOS architecture enabling rail-to-rail input operation from V_SS – 0.3 V to V_DD + 0.3 V, with seamless transition near V_DD – 1.1 V. Its unity-gain-stable design features 65° phase margin and no phase reversal - confirmed under overvoltage conditions beyond supply rails.

This dual op amp integrates two independent, fully matched amplifiers sharing only the V_DD and V_SS supply pins. Channel-to-channel separation exceeds 60 dB at 100 kHz (per Figure 2-35), supporting multi-channel precision sensing without crosstalk-induced error in active filter or differential signal conditioning topologies.

Key Specifications

Pinout & Package

The MCP6472T-E/MSVAO is housed in an 8-lead MSOP (Mini Small Outline Package) with exposed thermal pad (EP), offering θ_JA = 211°C/W and compatibility with standard surface-mount reflow profiles. The EP must be soldered to PCB ground plane for optimal thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-input-bias-current op amp applications.

Compared with MCP6482T-E/MS and OPA316IDR, the MCP6472T-E/MSVAO provides optimal balance of ultra-low high-temperature input bias current, 2 MHz bandwidth, and 100 µA quiescent current in a space-constrained MSOP-8 package - making it the preferred choice for thermally demanding, battery-sensitive precision sensing.

Availability

MCP6472T-E/MSVAO is available at Aetrix Electronics and suitable for photodiode amplifiers, pH electrode interfaces, and battery-powered signal conditioning requiring stable component supply across automotive, industrial, and medical device production programs.

Supply support for MCP6472T-E/MSVAO 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

Microchip Technology Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability semiconductor products.

The MCP6471/2/4 family was designed specifically for low-power, high-precision analog signal conditioning in high-impedance sensor interfaces - emphasizing ultra-low input bias current, rail-to-rail operation, and extended temperature robustness.

FAQ

What is the maximum input bias current specification for MCP6472T-E/MSVAO at +125°C?

The MCP6472T-E/MSVAO has a maximum input bias current of 350 pA and a typical value of 150 pA at +125°C, as specified in Table 1-1 of DS20002324C. This performance is enabled by Microchip's advanced CMOS process and makes the MCP6472T-E/MSVAO suitable for applications involving pH electrodes and photodiodes where leakage current directly impacts measurement accuracy.

Does MCP6472T-E/MSVAO support true rail-to-rail input operation below ground (VSS)?

Yes, the MCP6472T-E/MSVAO supports common-mode input voltages down to V_SS – 0.3 V, as stated in Table 1-1. This capability is essential for interfacing with sensors that produce negative-going signals relative to ground or for single-supply circuits requiring full input range utilization - and is verified across the full –40°C to +125°C temperature range.

Can MCP6472T-E/MSVAO drive capacitive loads without external isolation resistors?

The MCP6472T-E/MSVAO can drive capacitive loads up to ~100 pF stably in unity-gain configuration without added series resistance. For larger loads (e.g., >100 pF), Figure 4-5 in DS20002324C recommends adding an output isolation resistor (R_ISO) - for example, 20 Ω for 1 nF at G = +1 V/V - to restore phase margin and prevent peaking or ringing in the step response.

Is the exposed thermal pad (EP) on MCP6472T-E/MSVAO electrically connected to any internal node?

Yes, the exposed thermal pad (EP) on the MCP6472T-E/MSVAO is internally connected to the V_SS pin, as explicitly stated in Section 3.4 and Table 3-1 of DS20002324C. It must be soldered to a PCB ground plane to ensure proper thermal dissipation (θ_JA = 211°C/W) and to reduce noise coupling - floating or unconnected EP degrades both thermal and electrical performance.

How does channel-to-channel separation affect dual-op-amp performance in MCP6472T-E/MSVAO?

Per Figure 2-35 in DS20002324C, the MCP6472T-E/MSVAO achieves >60 dB channel-to-channel separation at 100 kHz, meaning crosstalk between amplifier A and B remains below –60 dB across audio and low-MHz frequencies. This enables independent use of both amplifiers in multi-channel sensor systems - such as simultaneous pH and ORP measurement - without signal contamination or gain error from adjacent channel activity.