Part A
AD7793BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6887 Stückzahl
- Package
- TSSOP-16
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7793BRUZ and AD7793BRU are functionally equivalent 24-bit sigma-delta ADCs from Analog Devices, differing only in the RoHS-compliant packaging designation of the TSSOP-16 package. Both parts share identical resolution, channel count, interface, and operating specifications, making the BRUZ a suitable drop-in replacement for the BRU in new and existing designs where lead-free compliance is required.
Resolution and Channel Count
High match
Package Type and Pinout
High match
Supply Voltage and Interface
High match
Operating Temperature Range
High match
Parts at a glance
Part B
AD7793BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5584 Stückzahl
- Package
- TSSOP-16
- Series
- Datenerfassung mit Analog to Digital Converters (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 | AD7793BRUZ | AD7793BRU | Why it matters |
|---|---|---|---|
| Resolution | 24 bit | 24 bit | Determines the smallest signal change the ADC can resolve; identical resolution means equivalent measurement precision. |
| Number of ADC Inputs / Channels | 3 differential | 3 differential | Defines how many sensor channels can be connected; matching channel count supports the same system architecture. |
| Sampling Rate (max) | 470 SPS | 470 SPS | Sets the maximum output data rate; identical rates ensure the same timing and filtering performance. |
| Interface Type | SPI | SPI | Determines host communication protocol; matching SPI interface allows drop-in firmware compatibility. |
| Supply Voltage (analog/digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Defines the operating voltage range; identical ranges allow use in the same power supply design. |
| Package / Mounting | 16-TSSOP, surface mount | 16-TSSOP, surface mount | Determines PCB footprint and assembly; identical package enables direct board-level substitution. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Non-RoHS (contains lead) | Affects regulatory compliance and solder process; the Z suffix denotes lead-free, which matters for RoHS-restricted production. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Defines environmental limits; identical ranges ensure the same reliability across applications. |
| Internal PGA Gain Range | 1 to 128 | 1 to 128 | Allows amplification of small sensor signals; matching gain range supports the same low-level input conditioning. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7793BRU | AD7793BRUZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 470 | 470 |
| Number of Inputs | 3 | 3 |
| Input Type | Differential | Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What is the difference between the AD7793BRUZ and the AD7793BRU?
The AD7793BRUZ and AD7793BRU are functionally identical 24-bit sigma-delta ADCs from Analog Devices. The only difference is the "Z" suffix, which indicates that the AD7793BRUZ is supplied in a RoHS-compliant, lead-free package, while the AD7793BRU is the non-RoHS (leaded) version. Both are specified over the −40°C to +105°C temperature range and come in a 16-lead TSSOP.
Can the AD7793BRUZ be used as a direct replacement for the AD7793BRU?
Yes, from an electrical and functional standpoint the two parts are identical and share the same datasheet, pinout, and 16-lead TSSOP footprint. The AD7793BRUZ can be used in place of the AD7793BRU where RoHS compliance is required or preferred. Verify your assembly process and any regulatory requirements before substituting, since the lead-free finish may require different soldering profiles.
Are the AD7793BRUZ and AD7793BRU RoHS compliant?
The AD7793BRUZ is RoHS compliant and lead-free (the "Z" suffix denotes this). The AD7793BRU is the non-RoHS, leaded version and is not RoHS compliant. Designers targeting RoHS-compliant products should select the AD7793BRUZ.
What are the key specifications shared by the AD7793BRUZ and AD7793BRU?
Both devices are 24-bit sigma-delta ADCs with three differential input channels, an on-chip low-noise programmable gain amplifier (PGA), an internal reference, and an internal clock. They support output data rates from 4.17 SPS to 470 SPS, operate from a 2.7 V to 5.25 V supply, and are housed in a 16-lead TSSOP package specified over −40°C to +105°C.
Do the AD7793BRUZ and AD7793BRU have the same package and pinout?
Yes. Both parts are offered in the same 16-lead TSSOP (RU-16) package with identical pin assignments, so the PCB land pattern and pin functions are the same. The difference is only the package finish (lead-free/RoHS for the Z version versus leaded for the non-Z version).
Which part should be chosen for a new RoHS-compliant design?
For new designs requiring RoHS compliance, the AD7793BRUZ should be selected because it is the lead-free, RoHS-compliant variant. The AD7793BRU is the non-RoHS version and is generally not appropriate for products that must meet RoHS requirements.
Are the AD7793BRUZ and AD7793BRU interchangeable in terms of firmware and register configuration?
Yes. Because both parts share the same silicon design and datasheet, the register map, communication interface (SPI), and configuration settings are identical. Firmware written for the AD7793BRU will operate the AD7793BRUZ without modification; only the physical package finish differs.