Analog Devices Inc. OP400HS

Overview

OP400HS from Analog Devices is a quad low-offset, low-power operational amplifier designed for precision analog signal conditioning in space- and power-constrained systems. It delivers 150 μV max input offset voltage, 1.2 μV/°C max drift over −40°C to +85°C, 725 μA max supply current per amplifier, 5000 V/mV min open-loop gain, and stable operation with 10 nF capacitive loads - enabling high-accuracy sensor front-ends and multi-channel instrumentation.

For engineers reviewing the OP400HS datasheet, OP400HS pinout, OP400HS application, or OP400HS equivalent, this page provides verified technical context, military-grade temperature performance (−40°C to +85°C), SOIC_W package mapping, confirmed quad amplifier architecture, and real-world design values for offset, drift, noise, gain, and load stability - all specific to the OP400HS variant.

Technical Context

The OP400HS integrates four independent precision op amps on a single die, each featuring laser-trimmed input offset via on-chip Zener zap technology - eliminating external nulling components. Its architecture supports unity-gain stability and maintains ≥120 dB CMR and <1.8 μV/V PSRR across its operating range.

It uses bipolar input stages with matched PNP transistors to achieve sub-3 nA input bias current and 11 nV/√Hz input voltage noise density at 1 kHz, while sustaining 500 kHz gain-bandwidth product and 0.15 V/μs slew rate under ±15 V supplies - optimized for DC-critical, low-drift measurement chains.

Key Specifications

Pinout & Package

OP400HS is packaged in a 16-lead SOIC_W (RW-16) with standard quad op amp pinout and no null terminals. Pin 1 is OUT A; pins 2–3 are −IN A/+IN A; pin 4 is V+; pins 5–6 are +IN B/−IN B; pin 7 is OUT B; pins 8–9 are NC/NC; pins 10–11 are OUT C/−IN C; pin 12 is +IN C; pins 13–14 are +IN D/−IN D; pin 15 is OUT D; pin 16 is V−.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad precision op amp applications.

Compared with OP400HS, OP4177ARZ trades 2.5× higher supply current for 2.5× lower offset, while LT1499ISW#PBF extends temperature range by 40°C but increases noise and offset - making OP400HS optimal for industrial instrumentation requiring balanced precision, power, and stability.

Availability

OP400HS is available at Aetrix Electronics and suitable for precision sensor signal conditioning, multi-channel instrumentation amplifiers, bipolar current transmitters, and tracking voltage reference designs requiring stable component supply across extended temperature ranges.

Supply support for OP400HS 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The OP400HS belongs to Analog Devices' precision op amp product line, engineered for applications demanding low offset, low drift, and low power in harsh industrial and military environments - particularly multi-channel measurement systems where space and thermal matching are critical.

FAQ

What is the maximum operating temperature range for the OP400HS?

The OP400HS is rated for operation from −40°C to +85°C, as specified in the Analog Devices ordering guide for the OP400HSZ and OP400HSZ-REEL variants. This temperature range is validated per JEDEC standards and applies to the 16-lead SOIC_W (RW-16) package. The device maintains all key specifications - including 150 μV max input offset voltage and 1.2 μV/°C max drift - across this full range, making it suitable for industrial control and outdoor instrumentation applications where ambient conditions vary widely. OP400HS does not support the −55°C to +125°C military range offered by the OP400AY variant.

Does the OP400HS require external offset nulling components?

No, the OP400HS does not require external offset nulling components. It uses on-chip Zener zap trimming during manufacturing to achieve its guaranteed 150 μV maximum input offset voltage, eliminating the need for potentiometers or external trim networks. This simplifies PCB layout, reduces component count, and improves long-term stability - as the trimmed offset remains stable over time and temperature. The datasheet explicitly states that "on-chip Zener zap trimming achieves the low input offset voltage of the OP400 and eliminates the need for offset nulling," and the OP400HS pinout confirms no null terminals are present.

Can the OP400HS drive a 10 nF capacitive load without oscillation?

Yes, the OP400HS is specifically characterized for stable operation with ≥10 nF capacitive loads, as confirmed in Table 1 (Capacitive Load Stability) and Figure 22 of the Rev. I datasheet. This capability is intrinsic to its internal compensation and allows direct interfacing with ADC input capacitors, long cables, piezoelectric sensors, and RC filters without external isolation resistors or compensation networks. The specification applies across the full −40°C to +85°C temperature range and with ±15 V supplies, making it reliable for high-fidelity data acquisition systems where load capacitance cannot be minimized.

What is the supply current consumption of the OP400HS per amplifier?

The OP400HS draws a maximum of 725 μA per amplifier under no-load conditions with ±15 V supplies, as specified in Table 1 (Supply Current per Amplifier, ISY). This means the full quad device consumes ≤2.9 mA total - less than a single OP07 op amp - while delivering superior precision. Typical consumption is 600 μA per amplifier, and the value is guaranteed over the full −40°C to +85°C operating range. This low quiescent current enables battery-powered portable instrumentation and multi-channel systems where power efficiency is critical without sacrificing DC accuracy.

Is the OP400HS pin-compatible with other OP400 variants like OP400GPZ or OP400GSZ?

The OP400HS is pin-compatible with other 16-lead SOIC_W variants such as OP400GSZ and OP400GSZ-REEL, sharing identical RW-16 footprint and pinout (including NC pins 8 and 9). However, it is not pin-compatible with 14-lead variants (e.g., OP400GPZ in PDIP or OP400AY in CERDIP), which have different pin counts and assignments. All SOIC_W versions use the same functional pin mapping shown in Figure 2 of the datasheet, ensuring drop-in replacement among RW-16 packages - provided temperature grade and electrical specs meet design requirements. Always verify package option codes (RW-16 vs. N-14/Q-14) before substitution.