Part A
AD7322BRUZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4528 PCS
- Package
- TSSOP-14
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7322BRUZ and AD7327TRU-EP share the same 12-bit SAR ADC architecture, 1 MSPS throughput, and TSSOP-20 footprint, making them functionally comparable for many designs. However, the AD7327TRU-EP offers twice the input channel count and an extended temperature range, while the AD7322BRUZ provides a simpler single-channel configuration. Designers should validate channel requirements and thermal margins before substituting.
Channel Count
Validation required
Resolution
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
AD7327TRU-EP
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6822 PCS
- Package
- TSSOP-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD7322BRUZ | AD7327TRU-EP | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 2 | 8 | Channel count determines how many analog signals can be sampled; a 2-channel part cannot directly replace an 8-channel part in multi-sensor systems. |
| Resolution | 12 bit plus sign (13-bit) | 12 bit plus sign (13-bit) | Resolution sets the smallest measurable signal step; matching resolution preserves measurement accuracy in a substitution. |
| Maximum Throughput Rate | 1 MSPS | 500 kSPS | Throughput rate limits the highest signal frequency that can be digitized; a slower part may not meet sampling requirements of the original design. |
| Input Voltage Range | ±10 V, ±5 V, ±2.5 V, 0 to 10 V (software selectable) | ±10 V, ±5 V, ±2.5 V, 0 to 10 V (software selectable) | Selectable bipolar/unipolar ranges allow direct interface to various sensors; matching ranges preserves signal conditioning compatibility. |
| Supply Voltage | 2.7 V to 16.5 V (VDD), ±5 V to ±16.5 V (VSS) | 2.7 V to 16.5 V (VDD), ±5 V to ±16.5 V (VSS) | Supply requirements determine power rail compatibility; identical rails simplify drop-in replacement. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Serial interface compatibility ensures the host microcontroller can communicate without firmware or hardware changes. |
| Package | 16-lead TSSOP | 20-lead TSSOP | Package footprint and pin count affect PCB layout; different packages require board redesign and cannot be drop-in substituted. |
| Operating Temperature Range | -40 °C to +85 °C | -55 °C to +125 °C (enhanced product) | Temperature range determines suitability for harsh environments; the EP variant supports wider military/industrial extremes. |
| Power Consumption | Typically 6 mW at 3 V (normal mode) | Typically 17 mW at 3 V (normal mode) | Power consumption affects thermal budget and battery life; the higher-channel part draws more current, impacting low-power designs. |
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 | AD7322BRUZ | AD7327TRU-EP |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | iCMOS® | iCMOS® |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 500k |
| Number of Inputs | 1, 2 | 2, 3, 4 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Differential, Pseudo-Differential, Single Ended |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-S/H-ADC | MUX-S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | ±12V ~ 16.5V | ±12V ~ 16.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Features | True Bipolar | Temperature Sensor, True Bipolar |
| Operating Temperature | -40°C ~ 85°C | -55°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7322BRUZ and AD7327TRU-EP?
The AD7322BRUZ is a 2-channel, 12-bit plus sign successive approximation ADC in a 16-lead TSSOP package, specified for the 0°C to +70°C commercial temperature range. The AD7327TRU-EP is an 8-channel, 12-bit plus sign ADC in a 20-lead TSSOP package, enhanced product (EP) version specified for the −55°C to +125°C extended temperature range. The AD7327TRU-EP provides six additional input channels and a wider operating temperature range compared to the AD7322BRUZ.
Do the AD7322BRUZ and AD7327TRU-EP have the same number of analog input channels?
No. The AD7322BRUZ provides 2 analog input channels, while the AD7327TRU-EP provides 8 analog input channels. The channel count difference is a primary factor when selecting between the two devices.
Are the AD7322BRUZ and AD7327TRU-EP pin-compatible?
No. The AD7322BRUZ is housed in a 16-lead TSSOP, and the AD7327TRU-EP is housed in a 20-lead TSSOP. The different package sizes and pin counts mean the two devices are not pin-compatible and cannot be used as drop-in replacements on the same PCB land pattern.
What is the resolution and throughput of these AD7322/AD7327 devices?
Both the AD7322BRUZ and AD7327TRU-EP are 12-bit plus sign successive approximation ADCs. The AD7322 offers throughput up to 1 MSPS, and the AD7327 offers throughput up to 500 kSPS, per the respective Analog Devices datasheets. Designers should confirm the exact timing specification against the latest datasheet revision for their target operating conditions.
What analog input voltage ranges do the AD7322BRUZ and AD7327TRU-EP support?
Both devices support software-selectable input ranges of ±10 V, ±5 V, ±2.5 V, 0 V to +10 V, and 0 V to +5 V, allowing direct interfacing with a variety of industrial signal levels. The bipolar and unipolar ranges are configured through the serial interface on both parts.
What is the difference in temperature range between the AD7322BRUZ and AD7327TRU-EP?
The AD7322BRUZ is specified over the 0°C to +70°C commercial temperature range. The AD7327TRU-EP is an enhanced product version specified over the −55°C to +125°C extended temperature range, making it suitable for harsher environments such as aerospace and defense applications.
What serial interface do the AD7322BRUZ and AD7327TRU-EP use?
Both devices use an SPI-compatible serial interface for configuration and data readback, supporting daisy-chain and multiple-device configurations. The interface operates at clock rates specified in the respective Analog Devices datasheets, and designers should verify the maximum SCLK rate for the exact grade and supply voltage used.
Can the AD7322BRUZ be used as a substitute for the AD7327TRU-EP in an existing design?
No, not as a direct drop-in replacement. The AD7322BRUZ has fewer channels (2 versus 8) and a different package (16-lead versus 20-lead TSSOP), and it is specified over a narrower temperature range. Any substitution would require a PCB redesign, firmware changes for channel configuration, and validation against the target application's environmental requirements.