Analog Devices Inc./Maxim Integrated MAX4482ASA+

Overview

The MAX4482ASA+ from Maxim Integrated is a dual, rail-to-rail output operational amplifier optimized for low-power, single-supply operation across -40°C to +125°C. It draws only 50μA per amplifier at 5V, delivers ±3mA output drive, achieves 105dB open-loop gain into 5kΩ, and remains unity-gain stable with up to 400pF capacitive load - enabling precision signal conditioning in automotive sensor interfaces and portable instrumentation.

For engineers reviewing the MAX4482ASA+ datasheet, MAX4482ASA+ pinout, MAX4482ASA+ application, or MAX4482ASA+ equivalent, key selection criteria include its SO-8 package, 2.5V–5.5V supply range, 80mV rail-to-rail output swing (RL = 5kΩ), 140kHz gain-bandwidth product, and guaranteed operation over extended temperature.

Technical Context

The MAX4482ASA+ implements a BiCMOS input stage with rail-to-rail CMOS output stage, supporting common-mode input voltage from VSS to VDD – 1.3V and delivering full-swing output within 80mV of either rail under 5kΩ load. Its 140kHz GBW and 70° phase margin ensure stability in unity-gain configurations with capacitive loads up to 400pF.

Each amplifier operates independently with matched input bias current (<100pA) and offset voltage (±5.5mV max), enabling dual-channel differential sensing without inter-channel crosstalk degradation - validated by >60dB channel-to-channel isolation at 100kHz.

Key Specifications

Pinout & Package

MAX4482ASA+ is housed in an 8-pin SO (Small Outline) package (package code S8+2, outline 21-0041), RoHS-compliant and lead-free, with standard 1.27mm pitch and 5.0mm × 6.2mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV358IDR and MCP6022-E/SN, the MAX4482ASA+ uniquely balances ultra-low power (50μA), guaranteed +125°C operation, and rail-to-rail output in SO-8 - making it the only option qualified for always-on automotive sensor nodes with strict thermal and energy constraints.

Availability

MAX4482ASA+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, and portable medical diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4482ASA+ 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

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for harsh-environment applications including automotive, industrial, and communications systems.

The MAX4480–MAX4483 family was engineered specifically for cost-sensitive, low-power, single-supply signal conditioning in automotive and industrial settings where rail-to-rail output, wide temperature range, and minimal quiescent current are mandatory.

FAQ

What is the maximum capacitive load the MAX4482ASA+ can drive while remaining stable?

The MAX4482ASA+ is unity-gain stable with capacitive loads up to 400pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure MAX4480 toc19). This allows direct connection to ADC input capacitance or long PCB traces without external isolation resistors. Exceeding 400pF may cause peaking or oscillation; for larger loads, a series resistor (e.g., 10–50Ω) between MAX4482ASA+ output and the load is recommended.

Does the MAX4482ASA+ support true rail-to-rail input common-mode range?

No, the MAX4482ASA+ supports rail-to-rail *output* swing but has a limited input common-mode range of VSS to VDD − 1.3V (min), as specified in the Electrical Characteristics table. This means the input cannot accept signals within 1.3V of VDD. For applications requiring full rail-to-rail input, consider alternatives like the MAX4477 or ADA4077, but note those lack the MAX4482ASA+'s 50μA quiescent current and +125°C rating.

Is the MAX4482ASA+ pin-compatible with other devices in the MAX4480–MAX4483 family?

No - the MAX4482ASA+ (dual, SO-8) is not pin-compatible with the single-channel MAX4480 (SC70-5) or MAX4481 (SC70-6), nor with the quad MAX4483 (TSSOP-14 or SO-14). While all share functional similarity, pinouts differ significantly: MAX4482ASA+ uses pins 1–3–6–7 for inputs and 4–5 for outputs, whereas MAX4483 allocates pins 1/2/9/10/12/13 for inputs and 4/7/8/14 for outputs. Always verify pin mapping against the MAX4482ASA+ specific configuration diagram.

What is the typical power-on settling time for the MAX4482ASA+?

The MAX4482ASA+ typically settles within 50μs after power-up, as documented in the "Settling Time to 0.1%" parameter (tS = 50μs, VOUT = 2V step) and verified in Figure MAX4480 roc21. This applies under standard conditions: VDD = 5V, RL = 5kΩ, and TA = +25°C. At temperature extremes (−40°C/+125°C), settling may extend to ≤100μs due to increased internal resistance; design margins should account for this in time-critical sampling systems.

Can the MAX4482ASA+ be used in shutdown mode like the MAX4481?

No - the MAX4482ASA+ does not include a shutdown feature. Only the MAX4481 variant (single-channel, SC70-6/SOT23-6) integrates an active-low SHDN pin that reduces supply current to 0.5μA max. The MAX4482ASA+ lacks this pin and associated circuitry; attempting to force shutdown via VDD cycling risks violating absolute maximum ratings and inducing latch-up. For dual-channel shutdown capability, consider the MAX4490 or dual variants of the MAX44268 family.