Part A
AD7622BSTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5006 PCS
- Package
- LQFP-48
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7622BSTZ and AD7622BSTZRL are functionally identical, differing only in packaging format: the AD7622BSTZ is supplied in a tube, while the AD7622BSTZRL is supplied in tape-and-reel for automated assembly. Both share the same 16-bit SAR ADC core, LQFP-48 package, and specified performance, making the AD7622BSTZRL a direct functional replacement for the AD7622BSTZ when reel packaging is preferred.
Resolution and Architecture
High match
Package Type
High match
Electrical Specifications
High match
Packaging Format
High match
Parts at a glance
Part B
AD7622BSTZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9899 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 | AD7622BSTZ | AD7622BSTZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Determines the number of discrete output codes and the achievable dynamic range/SNR of the converter. |
| Sampling Rate | 2 MSPS | 2 MSPS | Sets the maximum throughput and the analog input bandwidth the system can digitize. |
| Architecture | SAR | SAR | Successive-approximation architecture implies no pipeline latency, which is critical for control-loop and multiplexed applications. |
| Input Type | Differential | Differential | Differential inputs improve common-mode rejection and noise immunity versus single-ended inputs. |
| Supply Voltage | 5 V analog / 2.5 V digital | 5 V analog / 2.5 V digital | Defines the required power rails and interface logic levels for direct board-level substitution. |
| Interface | SPI / QSPI / MICROWIRE / DSP | SPI / QSPI / MICROWIRE / DSP | Determines compatibility with the host controller's serial port and the achievable readback timing. |
| Package / Case | 48-LQFP | 48-LQFP | Must match the PCB footprint and thermal layout for a drop-in replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms the part is rated for the target application's environmental conditions. |
| Packaging / Ordering Format | Tray / tube (single unit) | Tape and reel (reel packaging) | Affects manufacturing handling: tape-and-reel suits automated pick-and-place lines, while trays suit low-volume or prototype builds; the silicon is otherwise identical. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7622BSTZ | AD7622BSTZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 2M | 2M |
| 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 | 2.37V ~ 2.63V | 2.37V ~ 2.63V |
| Voltage - Supply, Digital | 2.37V ~ 2.63V | 2.37V ~ 2.63V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between AD7622BSTZ and AD7622BSTZRL?
Both are the same Analog Devices AD7622 16-bit, 2 MSPS PulSAR analog-to-digital converter in a 48-lead LQFP package. The suffix difference is packaging form: AD7622BSTZ is the standard tray packaging, while AD7622BSTZRL denotes tape-and-reel packaging for automated assembly. Electrical and functional specifications are identical.
Are AD7622BSTZ and AD7622BSTZRL electrically and functionally interchangeable?
Yes. Both variants share the same die, package, pinout, and datasheet specifications (16-bit resolution, 2 MSPS throughput, 5 V analog supply, 2.5 V to 5 V digital interface). The only difference is the shipping form (tray vs. tape-and-reel), so they are interchangeable in the target design.
What are the key performance specifications of the AD7622?
The AD7622 is a 16-bit, 2 MSPS successive-approximation ADC featuring a differential input, SNR of approximately 92 dB, INL of ±1 LSB typical, and operation from a 5 V analog supply with a 2.5 V reference. It supports both parallel and serial interfaces and is specified over the −40 °C to +85 °C industrial temperature range.
Which package do AD7622BSTZ and AD7622BSTZRL use?
Both parts are supplied in a 48-lead LQFP (low-profile quad flat package) with a 7 mm × 7 mm body. The "Z" suffix indicates RoHS-compliant lead-free construction per Analog Devices nomenclature.
When should I choose the tape-and-reel version AD7622BSTZRL over AD7622BSTZ?
Choose AD7622BSTZRL when using automated pick-and-place assembly lines that require tape-and-reel feeding. Choose AD7622BSTZ (tray) for prototyping, low-volume hand assembly, or when tray handling is preferred. Both contain identical devices.
Do AD7622BSTZ and AD7622BSTZRL differ in price or availability?
Pricing and stock can differ between tray and tape-and-reel packaging due to order quantities and distributor inventory. Buyers should verify current pricing, minimum order quantities, and lead times with authorized distributors such as DigiKey, Mouser, or Analog Devices directly, as these commercial parameters change over time.
What is the operating temperature range for both variants?
Both AD7622BSTZ and AD7622BSTZRL are specified over the industrial temperature range of −40 °C to +85 °C, consistent with the AD7622 datasheet.