Part A
AD73311ARSZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6819 PCS
- Package
- SSOP-20
- Series
- Acquisition de données - Analog Front End (AFE)
Replacement verdict
Compatible functional replacement candidate
The AD73311LARS is a functionally compatible replacement candidate for the AD73311ARSZ, sharing the same analog front-end architecture, 16-bit sigma-delta conversion, serial interface, and 20-lead SSOP footprint. The primary distinction is the operating supply voltage range, which requires validation against the target system's power rail before substitution.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
Validation required
Serial Interface
High match
Parts at a glance
Part B
AD73311LARS
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3698 PCS
- Series
- Acquisition de données - Analog Front End (AFE)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD73311ARSZ | AD73311LARS | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Determines the dynamic range and signal-to-noise performance of the analog front end; identical resolution means comparable conversion fidelity. |
| Number of ADC/DAC Channels | 1 ADC / 1 DAC | 1 ADC / 1 DAC | Defines the analog I/O count per device; matching channel counts ensures the same signal chain architecture can be used. |
| Supply Voltage (Analog and Digital) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Confirms both parts operate from the same 3.3 V rail, so no power supply redesign is needed for substitution. |
| Package / Mounting | 20-Lead SSOP | 20-Lead SSOP | Identical package and footprint allow drop-in board replacement without layout changes. |
| Serial Interface | SPI-compatible serial port | SPI-compatible serial port | Same digital interface protocol ensures firmware and host controller compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching industrial temperature ratings mean both parts suit the same environmental conditions. |
| Sampling / Conversion Rate | Up to 64 kSPS | Up to 64 kSPS | Equal maximum sample rate supports the same voice-band and audio signal processing bandwidth. |
| On-Chip Programmable Gain Amplifier | Yes (PGA with programmable gain) | Yes (PGA with programmable gain) | Both integrate a PGA, allowing direct connection of low-level analog signals without external amplification. |
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 | AD73311ARSZ | AD73311LARS |
|---|---|---|
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Number of Channels | 1 | 2 |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 3V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 3V |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | AD73311L |
| Power (Watts) | 50 mW | 50 mW |
Frequently asked questions
What are the key differences between the AD73311ARSZ and AD73311LARS?
Both are Analog Devices AD73311 series 16-bit sigma-delta analog front ends in a 20-lead SSOP package. The primary difference is the operating temperature range: the AD73311ARSZ is specified for the industrial range of −40°C to +85°C, while the AD73311LARS is specified for the commercial range of 0°C to +70°C. The "L" suffix denotes the commercial temperature grade.
Are the AD73311ARSZ and AD73311LARS pin-compatible?
Yes. Both devices are offered in the same 20-lead SSOP (RS) package with identical pin assignments, so they are pin-compatible and share the same PCB footprint.
Can the AD73311LARS be used as a drop-in replacement for the AD73311ARSZ?
Electrically and mechanically they are interchangeable, but the AD73311LARS is only rated for 0°C to +70°C. It should not be substituted for the AD73311ARSZ in applications that must operate below 0°C or above +70°C, where the industrial-grade AD73311ARSZ is required.
What is the resolution and architecture of the AD73311ARSZ and AD73311LARS?
Both devices are 16-bit sigma-delta analog front ends (AFEs) intended for voice-band and audio signal processing, integrating an ADC and DAC with programmable gain and serial port interfacing.
What supply voltage do the AD73311ARSZ and AD73311LARS require?
Both parts operate from a single 3.3 V supply (nominally 3.0 V to 3.6 V), consistent with the AD73311 family specification.
Do the AD73311ARSZ and AD73311LARS differ in power consumption or performance specifications?
No. Apart from the temperature grade, the AD73311ARSZ and AD73311LARS share the same datasheet electrical specifications, including conversion resolution, supply voltage, and serial interface characteristics. Only the guaranteed operating temperature range differs.
Which part should be selected for an industrial-temperature design?
The AD73311ARSZ should be selected for designs requiring operation from −40°C to +85°C. The AD73311LARS is limited to the commercial 0°C to +70°C range and is not guaranteed outside it.