Part A
AD7674ASTZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4562 PCS
- Package
- LQFP-48
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7674ASTZ and AD7674ASTZRL are functionally identical, differing only in packaging format (tube vs. tape and reel). Both share the same 18-bit SAR ADC core, 800 kSPS throughput, ±VREF input range, and 48-lead LQFP package, making them fully interchangeable for design and production purposes. The tape-and-reel variant is recommended for automated assembly lines, while the tube variant suits low-volume or prototyping needs.
Resolution and Throughput
High match
Package Type
High match
Input Configuration
High match
Supply Voltage
High match
Parts at a glance
Part B
AD7674ASTZRL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7785 PCS
- Package
- LQFP-48
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7674ASTZ | AD7674ASTZRL | Why it matters |
|---|---|---|---|
| Resolution | 18 bits | 18 bits | Determines the quantization step and achievable dynamic range; both parts provide identical 18-bit resolution, so accuracy potential is the same. |
| Sampling Rate | 800 kSPS | 800 kSPS | Sets the maximum throughput for the ADC; identical rates mean either part supports the same signal bandwidth and timing budget. |
| Architecture | SAR | SAR | Successive-approximation architecture defines latency, power, and no pipeline delay; matching architecture ensures equivalent system behavior. |
| Input Type | Differential | Differential | Differential inputs improve common-mode rejection and noise immunity; identical input topology allows the same front-end design. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Defines the required power rails and logic levels; matching supplies mean the same power design and interface levels apply. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Determines host connectivity and firmware; identical serial interface allows drop-in replacement without protocol changes. |
| Package / Mounting | 48-lead LQFP, surface mount | 48-lead LQFP, surface mount | Footprint and assembly process must match for board compatibility; identical package enables direct PCB substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Specifies environmental limits for reliable operation; matching ranges ensure the same application environments are supported. |
| Packaging / Ordering Format | Tray / tube (individual) | Tape and reel | Affects manufacturing handling and pick-and-place automation; the reel version suits high-volume assembly while the tray version suits prototyping or low-volume runs. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7674ASTZ | AD7674ASTZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 18 | 18 |
| Sampling Rate(Per Second) | 800k | 800k |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | SPI, Parallel, DSP | SPI, Parallel, DSP |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between AD7674ASTZ and AD7674ASTZRL?
The AD7674ASTZ and AD7674ASTZRL are the same Analog Devices 18-bit, 800 kSPS successive-approximation ADC in a 48-lead LQFP package. The suffix "RL" denotes tape-and-reel packaging for automated assembly, while the base AD7674ASTZ is supplied in standard tray or tube packaging. Electrical and functional specifications are identical.
Are the AD7674ASTZ and AD7674ASTZRL electrically and functionally identical?
Yes. Both order codes refer to the same silicon device, the AD7674, with identical resolution (18 bits), throughput (800 kSPS), input range options, and SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface. The only documented difference is the shipping packaging format.
Can AD7674ASTZRL be used as a drop-in replacement for AD7674ASTZ?
Yes, provided the assembly process supports tape-and-reel handling. Both parts share the same 48-lead LQFP footprint, pinout, and electrical characteristics per the Analog Devices AD7674 datasheet, so no PCB or firmware changes are required.
What package do the AD7674ASTZ and AD7674ASTZRL use?
Both devices are offered in a 48-lead LQFP (low-profile quad flat package), consistent with the "STZ" suffix in the Analog Devices ordering code. The package is RoHS-compliant per the manufacturer's ordering guide.
What are the key performance specifications shared by both parts?
Per the Analog Devices AD7674 datasheet, both parts provide 18-bit resolution, 800 kSPS maximum throughput, ±2.5 V or 0 V to 5 V selectable input ranges, and a serial interface. They also feature internal conversion clock and optional internal reference buffer, with typical SNR and INL figures as specified in the datasheet.
Why would a design choose the RL (tape-and-reel) version over the tray version?
The AD7674ASTZRL tape-and-reel format is intended for high-volume automated pick-and-place assembly lines, where reel-fed feeders improve throughput and reduce handling. The tray version (AD7674ASTZ) is typically used for prototyping, low-volume runs, or manual assembly.
Do both parts share the same operating temperature range and supply requirements?
Yes. Because they are the same device, both the AD7674ASTZ and AD7674ASTZRL operate over the industrial temperature range and use the same analog and digital supply voltages specified in the AD7674 datasheet. Packaging format does not affect these ratings.