DAC7615PB Equivalent & Substitute Parts

Part Overview

The DAC7615PB is a 12-bit digital-to-analog converter featuring four independent D/A channels with voltage-buffered output, designed for data acquisition applications. Manufactured by Texas Instruments in a 16-DIP through-hole package, this component operates with ±5V analog and 5V digital supply voltages using an external reference and SPI data interface.

The DAC7615PB is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

DAC7615PB

Texas InstrumentsIn Stock: 919DAC7615PB Datasheet

Current PartRFQ

DAC7615EB

Texas InstrumentsIn Stock: 2074DAC7615EB Datasheet

MFR RecommendedRFQ

DAC8420FPZ

Analog Devices Inc.In Stock: 3666DAC8420FPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DAC7615PB are qualified based on the following core electrical and mechanical parameters:

• 12-bit resolution with 4 independent D/A converters
• Voltage-buffered output configuration
• SPI serial data interface
• External reference input requirement
• R-2R resistor ladder architecture
• Operating temperature range of -40°C to 85°C
• Compatible supply voltage specifications

Two substitute parts meet these criteria:

DAC7615EB (Texas Instruments): Functionally identical to the DAC7615PB with all core electrical parameters matching. The primary difference is packaging: DAC7615EB uses a 20-SSOP surface-mount package instead of the 16-DIP through-hole format. This substitution requires PCB redesign for surface-mount assembly.

DAC8420FPZ (Analog Devices Inc.): Maintains 12-bit resolution, 4-channel configuration, SPI interface, and R-2R architecture. Settling time is 13µs (typical) versus 10µs for the DAC7615PB. Supply voltage range is broader (5V ~ 15V, -15V for analog supply). INL/DNL specifications differ slightly (±1, ±0.25 LSB versus ±1, ±1 LSB). Package format is identical 16-DIP through-hole, enabling direct board-level substitution.

Parameter Comparison

Engineering Selection Recommendations

For Direct Board-Level Substitution (No Redesign):

The DAC8420FPZ is the preferred substitute when maintaining the existing 16-DIP through-hole package footprint. Both parts share identical package dimensions and mounting type, allowing socket-compatible replacement. The DAC8420FPZ is currently in active production status, ensuring long-term availability. All core electrical parameters align with the DAC7615PB requirements. The broader analog supply voltage range (5V ~ 15V, -15V) provides additional design flexibility for systems with variable supply configurations.

For Surface-Mount Redesign:

The DAC7615EB offers an active-status alternative with identical electrical specifications to the DAC7615PB. This option requires PCB layout modification to accommodate the 20-SSOP surface-mount package. The DAC7615EB maintains the same manufacturer lineage and electrical performance, making it suitable for new designs or board revisions where surface-mount assembly is preferred.

Compliance Considerations:

All three parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for component selection.

Frequently Asked Questions (FAQ)

Q: Can the DAC7615EB replace the DAC7615PB without any circuit modifications?

A: The DAC7615EB is electrically equivalent to the DAC7615PB with identical core specifications. However, it requires PCB redesign because it uses a 20-SSOP surface-mount package instead of the 16-DIP through-hole package. Direct socket substitution is not possible.

Q: Is the DAC8420FPZ a pin-compatible replacement for the DAC7615PB?

A: The DAC8420FPZ uses the same 16-DIP through-hole package as the DAC7615PB, enabling direct board-level substitution without PCB redesign. Both parts share identical package dimensions and pin spacing.

Q: What is the difference in settling time between the DAC7615PB and DAC8420FPZ?

A: The DAC7615PB has a settling time of 10µs, while the DAC8420FPZ has a typical settling time of 13µs. This 3µs difference may be relevant for applications requiring high-speed analog output updates. Verify timing requirements against your specific application specifications.

Q: Can I use the DAC8420FPZ in a system designed for ±5V analog supply?

A: Yes. The DAC8420FPZ supports analog supply voltages of 5V ~ 15V and -15V, which encompasses the ±5V requirement of the original DAC7615PB design. The broader supply range provides compatibility with the original specification.

Q: What are the INL/DNL differences between these parts?

A: The DAC7615PB and DAC7615EB both specify INL/DNL as ±1 LSB (maximum) for both parameters. The DAC8420FPZ specifies INL as ±1 LSB and DNL as ±0.25 LSB, offering tighter differential nonlinearity performance.

Q: Are all three parts currently available for purchase?

A: The DAC7615PB is classified as obsolete. The DAC7615EB and DAC8420FPZ are both in active production status, ensuring ongoing availability for new orders and future supply chain continuity.