HFA1112IPZ Equivalent & Substitute Parts

Part Overview

The HFA1112IPZ is a buffer amplifier integrated circuit manufactured by Renesas Electronics Corporation, housed in an 8-PDIP package for through-hole mounting applications. This device functions as a single-circuit buffer amplifier with high slew rate performance suitable for signal conditioning and buffering applications. The HFA1112IPZ is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain functional compatibility across critical electrical parameters including bandwidth, slew rate, supply voltage requirements, and output drive capability while accommodating the same physical package footprint.

Substiute Parts

HFA1112IPZ

Renesas Electronics CorporationIn Stock: 1067HFA1112IPZ Datasheet

Current PartRFQ

AD9631ANZ

Analog Devices Inc.In Stock: 2868AD9631ANZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HFA1112IPZ is determined by compatibility across the following critical parameters:

Package and Mounting Compatibility: Both the main part and substitute must use the 8-DIP (0.300", 7.62mm) through-hole package to ensure direct board-level compatibility without layout modifications.

Electrical Performance Envelope: Substitute parts must operate within the specified supply voltage range (9V to 11V minimum and maximum), maintain compatible input bias current and input offset voltage characteristics, and deliver sufficient output current per channel (minimum 60 mA).

Frequency Response and Slew Rate: The substitute must support the required bandwidth and slew rate performance for the intended signal conditioning application. The HFA1112IPZ specifies 850 MHz bandwidth and 2400 V/µs slew rate as baseline performance metrics.

Single-Circuit Configuration: The substitute must contain exactly one amplifier circuit to match the functional architecture of the original device.

Regulatory and Environmental Compliance: Both parts must maintain ROHS3 compliance, MSL Level 1 rating, and support the operating temperature range of -40°C to 85°C.

Parameter Comparison

Engineering Selection Recommendations

The AD9631ANZ qualifies as a functional substitute for the HFA1112IPZ based on the following criteria:

Package Compatibility: Both devices use the 8-DIP (0.300", 7.62mm) through-hole package, enabling direct pin-for-pin replacement without PCB layout modifications.

Supply Voltage Compatibility: The AD9631ANZ supply voltage range (6V to 12V) encompasses the HFA1112IPZ operating range (9V to 11V), ensuring compatibility within the original design envelope.

Output Drive Capability: The AD9631ANZ provides 70 mA output current per channel, exceeding the HFA1112IPZ specification of 60 mA, confirming adequate drive capability for existing load requirements.

Regulatory Compliance: Both parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature specifications (-40°C to 85°C), satisfying environmental and regulatory requirements.

Product Status Advantage: The AD9631ANZ carries active product status from Analog Devices Inc., providing long-term availability and supply chain continuity compared to the obsolete HFA1112IPZ.

Performance Trade-offs: The AD9631ANZ exhibits lower slew rate (1300 V/µs versus 2400 V/µs) and reduced bandwidth (320 MHz versus 850 MHz). These differences reflect the voltage feedback amplifier architecture of the AD9631ANZ compared to the buffer amplifier topology of the HFA1112IPZ. Applications requiring the full performance envelope of the HFA1112IPZ must evaluate whether the reduced slew rate and bandwidth of the AD9631ANZ remain acceptable for the specific signal conditioning function.

Frequently Asked Questions (FAQ)

Q: Can the AD9631ANZ directly replace the HFA1112IPZ without circuit modifications?

A: The AD9631ANZ uses the same 8-DIP (0.300", 7.62mm) package and pin configuration, enabling direct physical replacement. However, the different amplifier topologies (buffer versus voltage feedback) and reduced performance specifications (slew rate and bandwidth) require circuit-level evaluation to confirm functional compatibility with the original application requirements.

Q: What are the key electrical differences between these two parts?

A: The HFA1112IPZ provides higher slew rate (2400 V/µs) and bandwidth (850 MHz) suitable for high-speed buffering applications. The AD9631ANZ operates at lower slew rate (1300 V/µs) and bandwidth (320 MHz) but offers improved input bias current (2 µA versus 25 µA) and lower input offset voltage (3 mV versus 8 mV). The AD9631ANZ also provides greater output current capability (70 mA versus 60 mA).

Q: Are both parts suitable for the same supply voltage range?

A: The HFA1112IPZ requires 9V to 11V supply voltage. The AD9631ANZ operates across 6V to 12V, which includes the HFA1112IPZ range. Designs operating at the 9V to 11V specification will function with either part, provided other performance criteria are met.

Q: What is the significance of the product status difference?

A: The HFA1112IPZ is classified as obsolete, indicating Renesas Electronics Corporation no longer manufactures or supports this device. The AD9631ANZ maintains active product status from Analog Devices Inc., ensuring continued availability, technical support, and supply chain reliability for new designs and ongoing production.

Q: How do the amplifier types differ functionally?

A: The HFA1112IPZ is a buffer amplifier designed for high-speed signal conditioning with minimal gain. The AD9631ANZ is a voltage feedback amplifier offering configurable gain through external resistor networks. Buffer amplifiers provide unity gain with high bandwidth and slew rate, while voltage feedback amplifiers provide flexibility in gain selection with different frequency response characteristics.

Q: Are there any compliance or environmental concerns with substitution?

A: Both parts maintain identical ROHS3 compliance, MSL Level 1 moisture sensitivity rating, and operating temperature range (-40°C to 85°C). No compliance or environmental barriers exist for substitution from a regulatory perspective.

Q: What applications would be affected by the reduced bandwidth and slew rate of the AD9631ANZ?

A: Applications requiring signal conditioning above 320 MHz or transient response faster than 1300 V/µs would experience performance degradation with the AD9631ANZ. High-frequency video buffering, RF signal conditioning, and fast pulse shaping applications may require the higher performance specifications of the HFA1112IPZ or alternative high-speed buffer devices.