Part A
AD7682BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4059 Stückzahl
- Package
- WFQFN-20
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7682BCPZRL7 and AD7682BCPZ are functionally identical 16-bit, 4-channel PulSAR analog-to-digital converters from Analog Devices, differing only in packaging format (tape-and-reel versus tray). Both share the same die, electrical specifications, and LFCSP-20 footprint, making them interchangeable for design and qualification purposes; the choice between them is driven solely by assembly and inventory handling requirements rather than by any performance or interface difference.
Resolution and Architecture
High match
Channel Count and Input Type
High match
Package and Footprint
High match
Supply Voltage and Interface
High match
Parts at a glance
Part B
AD7682BCPZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4566 Stückzahl
- Package
- WFQFN-20
- Series
- Datenerfassung mit 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 | AD7682BCPZRL7 | AD7682BCPZ | 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 | 4 (single-ended) / 2 (differential) | 4 (single-ended) / 2 (differential) | Defines how many analog inputs can be sampled, affecting system channel count and multiplexing needs. |
| Sampling Rate | 250 kSPS | 250 kSPS | Sets the maximum throughput for capturing dynamic signals; must meet the application's bandwidth requirement. |
| Interface Type | SPI / DSP / QSPI / MICROWIRE | SPI / DSP / QSPI / MICROWIRE | Determines compatibility with the host controller's serial bus and firmware driver requirements. |
| Supply Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | Must match the system power rail; affects analog input range and logic-level compatibility. |
| Package / Mounting | 20-Lead LFCSP, Surface Mount | 20-Lead LFCSP, Surface Mount | Footprint and mounting style must match the PCB 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 environment's thermal conditions. |
| Packaging / Delivery Form | Tape & Reel (RL7 suffix) | Tray / Tube (bulk) | Affects manufacturing handling and pick-and-place automation; the reel version suits high-volume SMT assembly while bulk suits prototyping or low-volume runs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7682BCPZ | AD7682BCPZRL7 |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 250k | 250k |
| Number of Inputs | 4 | 4 |
| 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 AD7682BCPZRL7 and AD7682BCPZ?
Both parts are the same AD7682 16-bit, 4-channel, 250 kSPS PulSAR analog-to-digital converter in a 20-lead LFCSP package. The difference is packaging format: AD7682BCPZ is supplied in trays, while AD7682BCPZRL7 is supplied in tape-and-reel (7-inch reel) for automated assembly. Electrical and functional specifications are identical.
Are AD7682BCPZRL7 and AD7682BCPZ electrically and functionally interchangeable?
Yes. Both order codes refer to the same silicon device, the AD7682BCPZ, with identical pinout, package, and datasheet specifications. The suffix difference only reflects the shipping medium (tray vs. tape-and-reel), so they are interchangeable in the target design.
What are the key specifications of the AD7682?
The AD7682 is a 16-bit, 4-channel, charge redistribution successive approximation ADC with a throughput of 250 kSPS, operating from a single 2.3 V to 5.5 V supply (VDD) with a separate 1.8 V to VDD digital interface (VIO). It offers selectable input ranges including 0 V to VREF, 0 V to 2×VREF, and ±VREF configurations, and communicates via an SPI-compatible serial interface.
What package do AD7682BCPZRL7 and AD7682BCPZ use?
Both parts are offered in a 20-lead LFCSP (lead frame chip scale package) with an exposed pad, designated by the "CPZ" code in the orderable part number. The package and pinout are identical between the tray and tape-and-reel versions.
Which part number should be selected for high-volume automated PCB assembly?
AD7682BCPZRL7 is the tape-and-reel option, which is generally preferred for automated pick-and-place assembly lines. AD7682BCPZ in trays is typically used for prototyping, low-volume runs, or manual assembly.
Do AD7682BCPZRL7 and AD7682BCPZ differ in temperature range or performance grade?
No. Both order codes correspond to the same B-grade device with the same specified operating temperature range and performance grade as defined in the AD7682 datasheet. The only difference is the delivery packaging.
What is the function of the AD7682 in a signal chain?
The AD7682 digitizes up to four single-ended or two differential analog input channels with 16-bit resolution at 250 kSPS, making it suitable for multichannel data acquisition, industrial process control, and portable instrumentation applications requiring high accuracy in a small footprint.