Part A
AD7714ARZ-5
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3765 個数
- Package
- SOIC-24
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7714ARZ-5 and AD7714AR-3 are functionally compatible 24-bit sigma-delta ADCs sharing the same package, pinout, and architecture, with the primary distinction being the specified supply voltage range. The AD7714ARZ-5 supports a wider supply range suitable for 5 V systems, while the AD7714AR-3 is characterized for 3 V operation. Designers should confirm that the supply rail and reference configuration of the target application align with the selected variant before substituting.
Resolution and Architecture
High match
Package and Pinout
High match
Supply Voltage Range
Validation required
Interface Type
High match
Parts at a glance
Part B
AD7714AR-3
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3597 個数
- Package
- SOIC-24
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | AD7714ARZ-5 | AD7714AR-3 | Why it matters |
|---|---|---|---|
| Supply Voltage (VDD) | 5 V nominal | 3 V nominal | The two parts are specified for different nominal supply rails, so the board power supply must match the chosen device; substituting one for the other may require a supply change. |
| Operating Supply Range | 4.75 V to 5.25 V | 2.7 V to 3.3 V (3 V operation) | The valid supply window differs, so a design regulated for one rail cannot directly host the other without verifying the supply stays within the device's allowed range. |
| Resolution | 24-bit sigma-delta ADC | 24-bit sigma-delta ADC | Both provide 24-bit resolution, so the core conversion capability is equivalent and substitutability hinges on supply and interface compatibility rather than resolution. |
| Number of Input Channels | 5 channels (3 differential / 5 pseudo-differential) | 5 channels (3 differential / 5 pseudo-differential) | Identical channel count and configuration means the same sensor front-end topology can be reused across both parts. |
| Interface | SPI-compatible serial (3-wire) | SPI-compatible serial (3-wire) | The same serial interface allows the same microcontroller firmware and wiring to be used, simplifying substitution. |
| Package | 24-lead SOIC (wide body) | 24-lead SOIC (wide body) | Matching package and pinout means the PCB footprint is identical, so no layout change is needed when swapping parts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure both parts suit the same environmental conditions and reliability requirements. |
| Reference Input | External differential reference | External differential reference | Both require an external reference, so the reference circuit design carries over unchanged between the two devices. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7714ARZ-5 | AD7714AR-3 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 1k | 1k |
| Number of Inputs | 3, 5 | 3, 5 |
| Input Type | Differential, Pseudo-Differential | Differential, Pseudo-Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 3V ~ 3.6V |
| Voltage - Supply, Digital | 3V ~ 5.25V | 3V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary differences between the AD7714ARZ-5 and the AD7714AR-3?
The AD7714ARZ-5 and AD7714AR-3 are both 24-bit sigma-delta ADCs from Analog Devices in a 24-lead SOIC package, but they differ in their specified supply voltage and performance grades. The AD7714ARZ-5 is specified for a 5 V supply, while the AD7714AR-3 is specified for a 3 V supply. The suffix digit indicates the nominal supply voltage for which the device is characterized, so the two variants are not interchangeable without verifying the target system's supply rail and the corresponding datasheet specifications.
Are the AD7714ARZ-5 and AD7714AR-3 pin-compatible?
Yes. Both devices are offered in the same 24-lead SOIC (RW-24) package and share the same pinout, since they belong to the same AD7714 family. The difference is the specified supply voltage and associated performance characteristics, not the package or pin assignment. PCB footprint and pin functions are therefore identical, but electrical compatibility must still be confirmed against the respective datasheet.
Can the AD7714AR-3 be used as a drop-in replacement for the AD7714ARZ-5?
Not directly. The AD7714ARZ-5 is characterized for a 5 V supply, whereas the AD7714AR-3 is characterized for a 3 V supply. Substituting one for the other requires verifying that the system supply voltage, reference voltage, input range, and output data rate requirements match the specifications of the replacement device. The designer must consult the Analog Devices datasheet for the specific grade to confirm that all timing, accuracy, and interface parameters are satisfied in the target design.
What is the resolution and architecture of the AD7714ARZ-5 and AD7714AR-3?
Both devices are 24-bit sigma-delta (charge-balancing) analog-to-digital converters with on-chip programmable gain amplifiers, intended for low-frequency, high-resolution measurement applications. They provide a serial interface and are part of the AD7714 family. The 24-bit resolution and sigma-delta architecture are common to both variants; the distinguishing factor is the specified supply voltage (5 V for the AD7714ARZ-5 and 3 V for the AD7714AR-3).
Do both parts support the same serial interface and communication protocol?
Yes. Both the AD7714ARZ-5 and AD7714AR-3 are members of the AD7714 family and use the same serial interface for communication with a host microcontroller or DSP. Because they share the same silicon family and pinout, the interface protocol and register set are common. Designers should still confirm interface timing specifications in the respective datasheet, since timing parameters can be specified differently at 5 V versus 3 V supply voltages.
Which part should be selected for a 3 V system versus a 5 V system?
For a system operating from a 3 V supply, the AD7714AR-3 is the appropriate choice because it is specified and characterized at that supply voltage. For a system operating from a 5 V supply, the AD7714ARZ-5 is the appropriate choice. Selecting the variant that matches the system supply ensures that the published datasheet specifications for accuracy, linearity, and timing apply to the actual operating conditions.
Are the AD7714ARZ-5 and AD7714AR-3 RoHS compliant?
The "Z" suffix in AD7714ARZ-5 indicates a RoHS-compliant package per Analog Devices' part numbering convention, whereas the AD7714AR-3 designation does not carry the Z suffix. Designers requiring RoHS compliance should verify the exact ordering code and compliance status against the current Analog Devices datasheet or product page, as compliance status is tied to the specific orderable part number.