Part A
AD7718BRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5458 個数
- Package
- TSSOP-28
- 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 AD7718BRUZ and AD7714ARS-5 are both 24-bit sigma-delta ADCs from Analog Devices sharing a comparable signal chain architecture, but they differ in channel count, package footprint, and supply configuration. The AD7714ARS-5 can serve as a functional substitute for the AD7718BRUZ only where the reduced channel count and SSOP-28 footprint are acceptable; a full pin-for-pin drop-in replacement is not possible without layout and firmware validation.
Resolution and ADC Architecture
Validation required
Channel Count
Not compatible
Package Type
Not compatible
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD7714ARS-5
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4752 個数
- Package
- SSOP-28
- 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 | AD7718BRUZ | AD7714ARS-5 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution alone does not distinguish them for substitutability. |
| Number of input channels | 8 (4 differential / 8 single-ended) | 5 (3 differential / 5 single-ended) | Channel count determines how many sensors can be multiplexed; the AD7718 offers more inputs, which affects system architecture. |
| Package | 28-lead TSSOP | 24-lead SSOP | Different package footprints and pin counts prevent direct drop-in replacement on an existing PCB. |
| Supply voltage (analog) | 2.7 V to 5.25 V | 5 V (4.75 V to 5.25 V) | The AD7718 supports lower supply voltages, enabling 3 V systems, while the AD7714-5 is a 5 V-only device. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Both use a similar serial interface, so firmware-level compatibility is generally maintained. |
| PGA gain range | 1 to 128 | 1 to 128 | Identical programmable gain ranges allow similar handling of low-level sensor signals. |
| Output data rate (max) | Up to 1.365 kSPS | Up to 1 kSPS | Slightly higher throughput on the AD7718 may matter for faster-sampling applications. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ranges mean both suit the same environmental conditions. |
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 | AD7718BRUZ | AD7714ARS-5 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 1.37k | 1k |
| Number of Inputs | 4/5, 8/10 | 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 | 2.7V ~ 3.6V, 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V | 3V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the AD7718BRUZ and the AD7714ARS-5?
The AD7718BRUZ is a 24-bit, 8-channel (4 differential) sigma-delta ADC with an on-chip PGA and programmable filter, housed in a 28-lead TSSOP. The AD7714ARS-5 is a 24-bit, 5-channel (3 differential) sigma-delta ADC with an on-chip PGA, housed in a 24-lead SSOP and specified for 5 V operation. The AD7718 offers more input channels and a different package, while the AD7714 provides a smaller channel count in a narrower package.
Are the AD7718BRUZ and AD7714ARS-5 pin-compatible or package-compatible?
No. The AD7718BRUZ uses a 28-lead TSSOP package, while the AD7714ARS-5 uses a 24-lead SSOP package. The pin counts and package footprints differ, so they are not drop-in replacements and require different PCB land patterns.
Do both devices support the same supply voltage range?
No. The AD7714ARS-5 is specified for a 5 V analog supply (the "-5" suffix denotes 5 V operation). The AD7718BRUZ operates from a 2.7 V to 5.25 V analog supply (AVDD) and a 2.7 V to 5.25 V digital supply (DVDD), allowing lower-voltage operation that the AD7714ARS-5 does not support.
How do the input channel counts compare between the two ADCs?
The AD7718BRUZ provides 8 analog input channels configurable as 4 fully differential or 8 pseudo-differential inputs. The AD7714ARS-5 provides 5 analog input channels configurable as 3 fully differential or 5 pseudo-differential inputs. The AD7718 therefore offers more channels for multi-sensor designs.
Do both parts include an on-chip programmable gain amplifier (PGA) and digital filter?
Yes. Both the AD7718BRUZ and AD7714ARS-5 integrate a programmable gain amplifier and a sigma-delta modulator with on-chip digital filtering, allowing direct interfacing of low-level sensor signals and rejection of power-line frequencies without external signal conditioning.
What serial interface do the AD7718BRUZ and AD7714ARS-5 use?
Both devices provide a three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, supporting daisy-chaining and readback of the internal registers for configuration and data retrieval.
Can the AD7714ARS-5 be used as a direct substitute for the AD7718BRUZ in an existing design?
No. Because the two devices differ in package (24-lead SSOP vs 28-lead TSSOP), channel count (5 vs 8), and supply voltage specification (5 V vs 2.7 V to 5.25 V), a direct substitution is not possible. Any replacement requires a PCB redesign and revalidation against the target system requirements.