Part A
AD7714YRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5155 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 AD7714YRZ and AD7715AR-3 are both 24-bit sigma-delta ADCs from Analog Devices sharing a compatible SPI/QSPI/MICROWIRE serial interface and similar SOIC-24/SOIC-16 signal-chain architecture, making the AD7715AR-3 a viable functional candidate for lower-channel-count designs. However, the AD7714YRZ offers four differential input channels versus the single differential channel of the AD7715AR-3, and the two devices differ in supply voltage range and package footprint, so the substitution requires validation of channel count, supply rails, and board layout before adoption.
Channel Count
Validation required
Resolution
High match
Supply Voltage Range
Validation required
Package Type
Not compatible
Parts at a glance
Part B
AD7715AR-3
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2523 個数
- Package
- SOIC-16
- 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 | AD7714YRZ | AD7715AR-3 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 16 | Higher resolution enables finer measurement of small signal changes; a 24-bit ADC provides significantly more precision than a 16-bit ADC. |
| Number of input channels | 5 (3 differential / 5 pseudo-differential) | 1 (1 differential) | Channel count determines how many signal sources can be measured; the AD7714 supports multi-channel systems while the AD7715 is single-channel only. |
| Interface type | SPI / QSPI / MICROWIRE / DSP compatible (serial) | SPI / QSPI / MICROWIRE / DSP compatible (serial) | Both use a similar serial interface, but the AD7714 offers additional interface flexibility for multi-channel addressing. |
| Supply voltage (analog/digital) | +3 V or +5 V operation | +3 V operation | Supply voltage compatibility affects whether the part can drop into an existing 5 V or 3 V design without level shifting or regulator changes. |
| Package | 24-lead SOIC (wide body) | 16-lead SOIC (wide body) | Different package footprints and pin counts mean the parts are not drop-in replacements on the same PCB layout. |
| PGA gain settings | 1 to 128 (binary steps) | 1, 2, 32, 128 | Programmable gain affects the ability to amplify small sensor signals; the AD7714 offers finer gain granularity across the full range. |
| Output data rate | Up to 1 kHz (programmable) | Up to 500 Hz (programmable) | Data rate determines measurement throughput; the AD7714 supports faster update rates for higher-speed control loops. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +85 °C | Wider temperature range allows operation in harsher environments; the AD7714 is rated for higher ambient temperatures. |
| On-chip calibration | Yes (self and system calibration) | Yes (self and system calibration) | Both support calibration to remove offset and gain errors, but the AD7714 provides calibration across multiple channels. |
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 | AD7714YRZ | AD7715AR-3 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 16 |
| Sampling Rate(Per Second) | 1k | 500 |
| Number of Inputs | 3, 5 | 1 |
| Input Type | Differential, Pseudo-Differential | Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-PGA-ADC | PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 3.3V, 5V | 3V ~ 3.6V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 3V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary differences between the AD7714YRZ and the AD7715AR-3?
The AD7714YRZ is a 24-bit sigma-delta ADC with 5 differential/3 pseudo-differential input channels, a programmable gain amplifier (PGA) from 1 to 128, and a serial interface supporting SPI and QSPI. The AD7715AR-3 is a 16-bit sigma-delta ADC with a single differential input channel, a PGA from 1 to 128, and a 3 V nominal supply. The AD7714YRZ offers higher resolution and more input channels, while the AD7715AR-3 is a lower-resolution, single-channel device optimized for 3 V operation.
Are the AD7714YRZ and AD7715AR-3 pin-compatible?
No. The AD7714YRZ is supplied in a 24-lead SOIC (RW-24) package, while the AD7715AR-3 is supplied in a 16-lead SOIC (R-16) package. The package sizes, pin counts, and pin functions differ, so they are not pin-compatible and cannot be interchanged on the same PCB footprint without redesign.
What are the resolution and output data rate specifications for each device?
The AD7714YRZ provides 24-bit resolution with a programmable output update rate from 5 Hz to 1 kHz. The AD7715AR-3 provides 16-bit resolution with a programmable output update rate from 5 Hz to 500 Hz. The AD7714YRZ therefore delivers higher resolution and a wider output data rate range than the AD7715AR-3.
How do the supply voltage requirements of the AD7714YRZ and AD7715AR-3 compare?
The AD7714YRZ operates from a single supply of 2.7 V to 3.6 V or a dual supply of ±2.7 V (AVDD = 2.7 V to 3.6 V, AVSS = -2.7 V), with DVDD from 2.7 V to 5.25 V. The AD7715AR-3 is specified for a 3 V nominal supply (AVDD = 3 V ± 10%, DVDD = 3 V ± 10%). The AD7715AR-3 is therefore restricted to 3 V operation, while the AD7714YRZ supports a wider supply range and dual-supply configurations.
What input channel configurations are available on each device?
The AD7714YRZ provides 5 differential input channels or 3 pseudo-differential input channels, selectable via internal registers. The AD7715AR-3 provides a single differential input channel (AIN+ and AIN-). Designs requiring multiple sensor inputs should use the AD7714YRZ, while single-channel applications can use the AD7715AR-3.
Do both devices include a programmable gain amplifier (PGA)?
Yes. Both the AD7714YRZ and the AD7715AR-3 include an on-chip PGA with selectable gains of 1, 2, 4, 8, 16, 32, 64, and 128. This allows both devices to interface directly with low-level sensor outputs such as load cells and thermocouples without external amplification.
What serial interface do the AD7714YRZ and AD7715AR-3 support?
Both devices provide a three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The interface includes a serial data output, serial data input, and serial clock, allowing direct connection to most microcontrollers and digital signal processors.
Can the AD7715AR-3 be used as a drop-in replacement for the AD7714YRZ in an existing design?
No. The AD7715AR-3 is not a drop-in replacement for the AD7714YRZ because the two devices differ in package (16-lead SOIC vs 24-lead SOIC), resolution (16-bit vs 24-bit), input channel count (single differential vs 5 differential/3 pseudo-differential), and supply voltage range (3 V only vs 2.7 V to 3.6 V single or ±2.7 V dual). A redesign of the PCB footprint, supply rail, and firmware is required to substitute one for the other.