Part A
AD7328BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7432 PCS
- Package
- TSSOP-20
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7322BRUZ and AD7328BRUZ share the same TSSOP-20 footprint, 12-bit SAR architecture, and software-selectable input ranges, making them strong functional replacement candidates. The primary distinction is channel count, so the AD7328BRUZ can serve as a higher-density substitute for the AD7322BRUZ where additional analog inputs are required, provided the system timing budget accommodates the corresponding throughput trade-off.
Package Type
High match
Resolution
High match
Input Range Configuration
High match
Channel Count
Validation required
Parts at a glance
Part B
AD7322BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4528 PCS
- Package
- TSSOP-14
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | AD7328BRUZ | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 2 | 8 | Channel count determines how many independent analog signals can be digitized; 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 when substituting parts. |
| Maximum Throughput Rate | 1 MSPS | 1 MSPS | Sample rate defines the highest signal bandwidth the ADC can capture; identical rates mean no loss of dynamic performance in the target application. |
| 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 a wide variety of sensors without external signal conditioning; matching ranges ensures drop-in compatibility. |
| Supply Voltage | 2.7 V to 16.5 V (VDD/VSS) | 2.7 V to 16.5 V (VDD/VSS) | Supply requirements must match the host system rails; identical supply ranges allow the same power design to be reused. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | A matching serial interface ensures the same microcontroller or DSP firmware can drive either part without protocol changes. |
| Package | 10-lead TSSOP | 20-lead TSSOP | Package footprint and pin count affect PCB layout; different packages require board redesign and cannot be swapped on the same land pattern. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range defines the environments in which the part is guaranteed to meet specifications; matching ranges preserve reliability in industrial applications. |
| Internal Reference | 2.5 V internal reference | 2.5 V internal reference | An on-chip reference simplifies the analog front end and improves accuracy; identical references mean the same external circuitry and calibration can be retained. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7328BRUZ | AD7322BRUZ |
|---|---|---|
| Series | iCMOS® | iCMOS® |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 4, 7, 8 | 1, 2 |
| 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 | Temperature Sensor, True Bipolar | True Bipolar |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7322BRUZ and AD7328BRUZ?
The AD7322BRUZ is a 2-channel, 12-bit plus sign successive approximation ADC, while the AD7328BRUZ is an 8-channel, 12-bit plus sign successive approximation ADC. Both are software-selectable true bipolar input ADCs from Analog Devices, but they differ in channel count and package pin count (TSSOP-16 for the AD7322 vs TSSOP-20 for the AD7328).
Do the AD7322BRUZ and AD7328BRUZ support the same input voltage ranges?
Yes. Both devices support software-selectable true bipolar input ranges of ±10 V, ±5 V, and ±2.5 V, as well as a 0 V to +10 V unipolar range, per Analog Devices datasheets.
Are the AD7322BRUZ and AD7328BRUZ pin-compatible?
No. The AD7322BRUZ is housed in a 16-lead TSSOP, while the AD7328BRUZ is housed in a 20-lead TSSOP. The different pin counts and pin assignments prevent direct pin-for-pin substitution without PCB redesign.
What is the maximum throughput rate of these ADCs?
Both the AD7322BRUZ and AD7328BRUZ offer a maximum throughput rate of 1 MSPS, according to Analog Devices datasheets.
Do both devices use the same digital interface?
Yes. Both the AD7322BRUZ and AD7328BRUZ feature a serial SPI-compatible interface, supporting standard serial communication with microcontrollers and DSPs.
What is the resolution of the AD7322BRUZ and AD7328BRUZ?
Both devices provide 12-bit resolution plus a sign bit, yielding 13-bit bipolar output coding, as specified in the Analog Devices datasheets.
Can the AD7322BRUZ be used as a drop-in replacement for the AD7328BRUZ?
No. The AD7322BRUZ has only 2 analog input channels versus 8 on the AD7328BRUZ, and the packages differ (16-lead vs 20-lead TSSOP). A drop-in replacement is not possible; the design must be validated against the specific channel count and footprint requirements.