Part A
AD73311ARZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5927 ПКС
- Package
- SOIC-20
- Series
- Сбор данных - аналоговый фронт-энд (AFE)
Replacement verdict
Compatible functional replacement candidate
The AD73311LAR is a functional replacement candidate for the AD73311ARZ, sharing the same analog front-end architecture, 16-bit sigma-delta conversion, and serial interface. Both devices are pin-compatible in the 20-lead SOIC package, though the LAR variant is specified for lower supply voltage operation, so system-level validation of the supply rail and clock configuration is recommended before substitution.
Package Type
High match
Resolution
High match
Supply Voltage
Validation required
Serial Interface
High match
Parts at a glance
Part B
AD73311LAR
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6788 ПКС
- Package
- SOIC-20
- Series
- Сбор данных - аналоговый фронт-энд (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 | AD73311ARZ | AD73311LAR | 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 number of analog input and output paths; matching channel counts ensures the same signal chain topology can be used. |
| Sampling Rate (max) | 64 ksps | 64 ksps | Sets the maximum conversion bandwidth; identical rates mean the same audio/signal bandwidth can be supported. |
| Supply Voltage (analog and digital) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Determines power rail compatibility; matching ranges allow the parts to drop into the same 3.3 V system design. |
| Interface Type | Serial (SPI-compatible) | Serial (SPI-compatible) | Defines how the device connects to a host processor; identical serial interface enables direct firmware and pin compatibility. |
| Package / Mounting | 20-SOIC (surface mount) | 20-SOIC (surface mount) | Affects PCB footprint and assembly; identical package means the same land pattern can be reused without redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Determines environmental robustness; matching ranges ensure equivalent reliability across the same application conditions. |
| Power Consumption (typical) | ~30 mW | ~30 mW | Impacts thermal budget and battery life; comparable consumption means similar power design constraints apply. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD73311ARZ | AD73311LAR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Number of Channels | 1 | 2 |
| Power (Watts) | 50 mW | 50 mW |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 3V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 3V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD73311ARZ and AD73311LAR?
Both devices are Analog Devices AD73311 series single-channel, 16-bit sigma-delta analog front ends (AFEs) for voice-band and audio applications. The AD73311ARZ is the standard-grade version in a 20-lead SOIC package, while the AD73311LAR is a lower-power variant in the same 20-lead SOIC package. The primary difference is the power consumption specification: the AD73311LAR is characterized for reduced supply current compared with the standard AD73311ARZ. Both share the same serial port, programmable gain amplifier, and 16-bit ADC/DAC architecture.
Are the AD73311ARZ and AD73311LAR pin-compatible?
Yes. Both parts are offered in the same 20-lead SOIC (R-20) package with identical pin assignments, so they are pin-compatible and share the same PCB land pattern. Designers should still confirm the exact package suffix and datasheet revision before substituting one for the other in an existing layout.
Can the AD73311LAR be used as a drop-in replacement for the AD73311ARZ?
Because the two devices are pin-compatible and share the same functional architecture, the AD73311LAR can generally be considered for substitution where lower power consumption is desired. However, the substitution should be validated against the specific datasheet limits for supply current, supply voltage range, and temperature grade, since the L-grade is specified for lower power and may have different guaranteed limits. Always verify against the current Analog Devices datasheet before production release.
What is the resolution and architecture of the AD73311 series converters?
The AD73311 family uses a sigma-delta (delta-sigma) architecture with 16-bit resolution for both the ADC and DAC paths. The devices integrate a programmable gain amplifier (PGA) on the analog input, a 16-bit ADC, a 16-bit DAC, and a serial port for interfacing to a DSP or microcontroller, making them suitable for voice-band and audio front-end applications.
What supply voltage do the AD73311ARZ and AD73311LAR require?
Both devices operate from a single 3 V supply (nominally 3.0 V to 3.6 V) with separate analog and digital supply pins. The exact minimum and maximum supply voltage limits, as well as the corresponding current consumption, should be taken from the respective Analog Devices datasheet for each grade.
What interface do the AD73311ARZ and AD73311LAR use to connect to a host processor?
Both parts use a synchronous serial port for data and control communication with a DSP or microcontroller. The serial port supports daisy-chaining of multiple AD73311 devices, which allows several AFE channels to share a single serial interface. Timing and clocking details are specified in the Analog Devices datasheet.
What temperature range are the AD73311ARZ and AD73311LAR specified for?
The AD73311ARZ and AD73311LAR are both specified for the industrial temperature range of -40°C to +85°C, consistent with the "A" grade designation in the part number. Designers should confirm the exact temperature grade in the current datasheet revision for the specific orderable part number.
Which applications are the AD73311ARZ and AD73311LAR intended for?
Both devices target voice-band and audio front-end applications, including digital telephony, voice processing, speech recognition front ends, and general-purpose audio data acquisition. The lower-power AD73311LAR is particularly suited to battery-powered or power-sensitive systems where reduced supply current is important, while the standard AD73311ARZ serves general-purpose designs.