Part A
AD7401AYRWZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5262 PCS
- Package
- SOIC-16
- Series
- Acquisition de données - ADC DAC - dédié
Replacement verdict
Compatible functional replacement candidate
The AD7403TRIZ-EP is a functionally compatible replacement candidate for the AD7401AYRWZ, sharing the same isolated sigma-delta modulator architecture, 16-bit output, and SOIC-16 wide-body package. Designers should validate the differing external clock requirement and the extended temperature range before finalizing the substitution in safety-critical or wide-temperature applications.
Output Type
High match
Package Type
High match
Clock Architecture
Validation required
Operating Temperature
Validation required
Parts at a glance
Part B
AD7403TRIZ-EP
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7350 PCS
- Package
- SOIC-16
- Series
- Acquisition de données - ADC DAC - dédié
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7401AYRWZ | AD7403TRIZ-EP | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit sigma-delta modulators, so resolution is equivalent for substitutability. |
| Isolation Rating (kV rms) | 5 | 5 | Reinforced isolation rating determines suitability for high-voltage safety applications; both meet 5 kV rms. |
| Maximum Data Rate (MHz) | 20 | 20 | Data rate affects achievable sampling bandwidth in motor control and current-sense loops. |
| Supply Voltage (V) | 5 | 5 | Matching supply voltage simplifies drop-in replacement without redesigning the power rail. |
| Operating Temperature Range (°C) | -40 to +125 | -55 to +125 | The extended military-grade range of the AD7403TRIZ-EP enables use in harsher environments. |
| Package | 16-Lead SOIC (RW-16) | 16-Lead SOIC (RW-16) | Identical package footprint allows direct PCB substitution without layout changes. |
| Input Type | Differential | Differential | Differential input supports accurate current sensing across shunts in noisy environments. |
| Output Interface | Serial (1-bit sigma-delta) | Serial (1-bit sigma-delta) | Matching digital output format ensures compatibility with the same digital filter/controller. |
| Qualification | Standard industrial | Enhanced Product (EP), military temperature | The EP grade of the AD7403TRIZ-EP targets defense/aerospace with extended qualification and temperature range. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7401AYRWZ | AD7403TRIZ-EP |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Type | Isolated Module | Modulator |
| Number of Channels | 1 | 1 |
| Resolution(Bits) | 16 b | 16 b |
| Sampling Rate(Per Second) | - | 78.1k |
| Data Interface | Serial | Serial |
| Voltage Supply Source | Dual Supply | Single Supply |
| Voltage - Supply | - | 5V |
| Operating Temperature | -40°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Series | iCoupler® | - |
Frequently asked questions
What are the AD7401AYRWZ and AD7403TRIZ-EP?
The AD7401AYRWZ is a second-generation isolated sigma-delta modulator from Analog Devices that converts an analog input signal into a high-speed, single-bit digital output stream. The AD7403TRIZ-EP is an enhanced-product isolated sigma-delta modulator from the same family, specified for operation over the extended temperature range of −55°C to +125°C and intended for aerospace and defense applications.
What is the key difference between the AD7401AYRWZ and AD7403TRIZ-EP?
The primary difference is the qualification grade and temperature range. The AD7401AYRWZ is a standard industrial-grade device, while the AD7403TRIZ-EP is an enhanced-product (EP) variant screened and specified for the extended −55°C to +125°C range. The AD7403TRIZ-EP also offers higher typical SNR performance than the AD7401A per the respective datasheets.
Do the AD7401AYRWZ and AD7403TRIZ-EP use the same package and pinout?
Both devices are offered in an 8-lead SOIC package with the same pin functions (VDD1, VIN+, VIN−, VDD2, MCLKIN, MDAT, and ground pins). However, designers must confirm the exact package outline and land pattern against the specific datasheet revision before treating them as drop-in replacements.
What are the typical resolution and SNR specifications of these modulators?
Both are 16-bit sigma-delta modulators. Per the Analog Devices datasheets, the AD7401A achieves approximately 14-bit typical SNR performance, while the AD7403 offers improved typical SNR of approximately 16 bits, making the AD7403TRIZ-EP preferable where higher dynamic range is required.
What isolation rating do the AD7401AYRWZ and AD7403TRIZ-EP provide?
Both devices use Analog Devices' iCoupler digital isolation technology and are rated for 5 kV rms isolation per UL 1577, with working voltage specifications detailed in the respective datasheets. Designers should verify the specific isolation parameters (VIORM, VIOSM) against the target safety standard.
Can the AD7403TRIZ-EP be used as a direct replacement for the AD7401AYRWZ?
Functional compatibility is high because both are pin-compatible 8-lead SOIC isolated sigma-delta modulators with the same clock and data interface. However, the AD7403TRIZ-EP is an EP-grade part with different screening and temperature specifications, so the replacement must be validated against the target design's thermal, accuracy, and qualification requirements.
What clock frequency do these modulators require?
Both devices accept an external master clock (MCLKIN) in the range of 5 MHz to 20 MHz, as specified in the Analog Devices datasheets. The modulator output data rate scales directly with the applied clock frequency.
Which applications are best suited to each device?
The AD7401AYRWZ is suited to standard industrial motor control, power inverter, and current-sensing applications. The AD7403TRIZ-EP, with its extended −55°C to +125°C temperature range and enhanced screening, is intended for aerospace, defense, and other high-reliability applications requiring enhanced-product qualification.