Part A
AD7689BCPZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5917 PCS
- Package
- WFQFN-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7689BCPZRL7 and AD7689BCPZ are functionally identical 16-bit, 8-channel PulSAR analog-to-digital converters sharing the same silicon die, package, and electrical specifications. The only distinction is the packaging format: the BCPZRL7 suffix denotes tape-and-reel shipment, while the BCPZ suffix denotes tray shipment. Either part number can be used interchangeably in the same design, with the selection driven solely by the assembly line's feeder and reflow requirements.
Resolution and Architecture
High match
Package and Footprint
High match
Electrical Specifications
High match
Packaging Format
High match
Parts at a glance
Part B
AD7689BCPZRL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1710 PCS
- Package
- WFQFN-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD7689BCPZRL7 | AD7689BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Determines the ADC's measurement precision and the smallest signal change it can resolve. |
| Number of Channels | 8 (single-ended) / 4 (differential) | 8 (single-ended) / 4 (differential) | Defines how many analog inputs can be multiplexed into the converter, affecting system channel count. |
| Sampling Rate | 250 kSPS | 250 kSPS | Sets the maximum throughput for capturing dynamic signals; must match the application's bandwidth needs. |
| Interface Type | SPI / DSP / QSPI / MICROWIRE | SPI / DSP / QSPI / MICROWIRE | Determines compatibility with the host microcontroller or DSP serial bus. |
| Supply Voltage (Analog & Digital) | 2.3 V to 5.5 V | 2.3 V to 5.5 V | Must match the system power rails and affects input range and logic-level compatibility. |
| Input Type | Pseudo-differential / single-ended | Pseudo-differential / single-ended | Defines how input signals are referenced, impacting noise immunity and grounding requirements. |
| Package / Mounting | 20-Lead LFCSP, Surface Mount | 20-Lead LFCSP, Surface Mount | Footprint and assembly compatibility must match the PCB layout for drop-in substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures the device meets the environmental conditions of the target application. |
| Packaging / Ordering Format | Tape & Reel (RL7 suffix) | Tray / Tube (bulk) | Affects manufacturing handling and pick-and-place automation; the electrical part is otherwise identical. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7689BCPZ | AD7689BCPZRL7 |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 250k | 250k |
| Number of Inputs | 8 | 8 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Differential, Pseudo-Differential, Single Ended |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-S/H-ADC | MUX-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 | 2.3V ~ 5.5V | 2.3V ~ 5.5V |
| Voltage - Supply, Digital | 2.3V ~ 5.5V | 2.3V ~ 5.5V |
| Features | Temperature Sensor | Temperature Sensor |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between AD7689BCPZRL7 and AD7689BCPZ?
Both parts are the same AD7689 16-bit, 8-channel, 250 kSPS PulSAR ADC in a 20-lead LFCSP package. The difference is packaging format: AD7689BCPZ is supplied in trays, while AD7689BCPZRL7 is supplied in tape-and-reel (7-inch reel) for automated assembly. Electrical and functional specifications are identical.
Are AD7689BCPZRL7 and AD7689BCPZ electrically and functionally identical?
Yes. Both share the same datasheet specifications: 16-bit resolution, 8-channel multiplexer, 250 kSPS throughput, SPI-compatible serial interface, and internal reference. The suffix difference (RL7 vs. none) denotes reel packaging versus tray packaging, not a change in silicon or performance.
Can AD7689BCPZRL7 be used as a drop-in replacement for AD7689BCPZ?
Yes, from a form, fit, and function perspective, since both are the same die in the same 20-lead LFCSP package with identical pinout. The only practical consideration is assembly: AD7689BCPZRL7 is tape-and-reel, while AD7689BCPZ is tray, so the pick-and-place equipment and feeder setup must match the chosen packaging.
What package do AD7689BCPZRL7 and AD7689BCPZ use?
Both are offered in a 20-lead LFCSP (lead frame chip scale package), designated by the "CPZ" code in the part number. The package is RoHS-compliant per the manufacturer's ordering guide.
What are the key performance specifications shared by AD7689BCPZRL7 and AD7689BCPZ?
Both are 16-bit successive-approximation ADCs with 8-channel input multiplexing, up to 250 kSPS throughput, an SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and operation from a single 2.3 V to 5.5 V supply (with separate VIO). They include an internal reference and support both unipolar and bipolar input ranges.
Which packaging option should be selected for high-volume automated production?
AD7689BCPZRL7 is the tape-and-reel option (7-inch reel), which is generally preferred for high-volume automated pick-and-place assembly. AD7689BCPZ in trays is typically used for prototyping, low-volume runs, or manual assembly.
Do AD7689BCPZRL7 and AD7689BCPZ differ in temperature range or grade?
No. Both carry the same "B" grade and are specified over the industrial temperature range of −40°C to +85°C, as defined in the AD7689 datasheet. The packaging suffix does not affect the temperature grade.