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
Not a drop-in replacement
The AD7714YRZ and AD7715AR-5 are both 24-bit sigma-delta ADCs from Analog Devices, but they are not functionally interchangeable. The AD7714YRZ offers a 5-channel programmable-gain input multiplexer with a bidirectional serial interface supporting both SPI and MICROWIRE, while the AD7715AR-5 is a single-channel fixed-gain device with a simpler 3-wire serial interface. Their package footprints, supply voltage ranges, and input configurations differ substantially, so a direct board-level substitution is not possible without redesign.
Different channel count
Different input configuration
Different package footprint
Different supply voltage range
Parts at a glance
Part B
AD7715AR-5
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2567 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-5 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 16 | Higher resolution provides finer measurement granularity; a 24-bit ADC can resolve much smaller signal changes than a 16-bit ADC, affecting precision-critical designs. |
| 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 limited to a single differential input. |
| 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; matching the host interface is essential for direct drop-in compatibility. |
| Supply voltage (analog/digital) | 2.7 V to 5.25 V (single supply) | 5 V (single supply, 4.75 V to 5.25 V) | Operating voltage range affects compatibility with system power rails; the AD7714 supports lower-voltage operation while the AD7715 is fixed to a 5 V supply. |
| Package type | 24-lead SOIC (wide body) | 16-lead SOIC (wide body) | Different package footprints and pin counts prevent direct PCB drop-in replacement without layout changes. |
| Programmable gain amplifier (PGA) | Yes (gain 1 to 128) | Yes (gain 1 to 128) | Both include a PGA for amplifying low-level signals, but the gain settings and input ranges differ slightly, affecting small-signal measurement capability. |
| Output data rate | Up to 1 kHz (programmable) | Up to 500 Hz (programmable) | Data rate determines measurement throughput; the AD7714 supports faster update rates, which matters for dynamic or multiplexed signal acquisition. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +85 °C | Wider temperature range enables use in harsher environments; the AD7714 is rated for higher ambient temperatures than the AD7715. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7714YRZ | AD7715AR-5 |
|---|---|---|
| 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 | 5V |
| 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-5?
The AD7714YRZ is a 24-bit sigma-delta ADC with 5 differential/3 pseudo-differential input channels, a programmable gain amplifier (PGA) with gains from 1 to 128, and an SPI-compatible serial interface, housed in a 24-lead SOIC. The AD7715AR-5 is a 16-bit sigma-delta ADC with a single differential input channel, PGA gains of 1, 2, 32, and 128, and a 3-wire serial interface, housed in a 16-lead SOIC. The AD7714YRZ offers higher resolution and more input channels, while the AD7715AR-5 is a simpler, lower-resolution single-channel device.
Are the AD7714YRZ and AD7715AR-5 pin-compatible or package-compatible?
No. The AD7714YRZ is supplied in a 24-lead SOIC (RW-24) package, while the AD7715AR-5 is supplied in a 16-lead SOIC (R-16) package. The pin counts, pin functions, and package footprints differ, so they are not drop-in replacements for each other.
What are the resolution and input channel differences between these two ADCs?
The AD7714YRZ provides 24-bit resolution with five input channels configurable as five differential or three pseudo-differential inputs. The AD7715AR-5 provides 16-bit resolution with a single differential input channel. The AD7714YRZ is therefore suited to multi-channel, high-resolution measurement, while the AD7715AR-5 targets single-channel 16-bit applications.
How do the programmable gain amplifier (PGA) settings compare between the AD7714YRZ and AD7715AR-5?
The AD7714YRZ PGA supports gains of 1, 2, 4, 8, 16, 32, 64, and 128. The AD7715AR-5 PGA supports gains of 1, 2, 32, and 128. The AD7714YRZ offers a finer gain selection, which allows more flexible scaling of low-level sensor signals.
Do the AD7714YRZ and AD7715AR-5 use the same serial interface?
No. The AD7714YRZ uses an SPI-compatible serial interface with separate DIN and DOUT lines and a DOUT/DRDY pin, supporting 3-wire operation. The AD7715AR-5 uses a 3-wire serial interface with a single bidirectional DATA line. The interface protocols and register maps differ, so firmware must be adapted when migrating between the two devices.
What are the supply voltage requirements for the AD7714YRZ and AD7715AR-5?
The AD7714YRZ operates from a single 3 V or 5 V supply (AVDD and DVDD), with the specified Y grade supporting 3 V and 5 V operation. The AD7715AR-5 is specified for a single 5 V supply. Designs migrating from the AD7715AR-5 to the AD7714YRZ should verify the supply rail and digital interface levels against the respective datasheets.
Can the AD7715AR-5 be replaced by the AD7714YRZ in an existing design?
Not as a direct drop-in replacement. The devices differ in package size and pinout (16-lead vs 24-lead SOIC), resolution (16-bit vs 24-bit), input channel count, PGA gain options, and serial interface protocol. A replacement requires PCB redesign, firmware changes, and revalidation against the AD7714YRZ datasheet.
Which device is better suited for multi-channel sensor measurement?
The AD7714YRZ is better suited for multi-channel sensor measurement because it provides five input channels (five differential or three pseudo-differential) and 24-bit resolution with a wide PGA gain range. The AD7715AR-5 provides only a single differential input channel at 16-bit resolution, making it appropriate for single-channel designs.