Part A
AD7923BRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1788 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7927BRU is a viable functional replacement candidate for the AD7923BRUZ, sharing the same 12-bit SAR architecture, 200 kSPS throughput, 16-lead TSSOP footprint, and serial interface, though the differing input channel count and analog input range require validation against the target application's signal chain requirements.
Resolution and Throughput
High match
Package and Pinout
High match
Input Channel Count
Validation required
Analog Input Range
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7923BRUZ | AD7927BRU | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so conversion resolution is equivalent for substitutability. |
| Number of Input Channels | 4 single-ended | 8 single-ended | The AD7927 provides twice the channel count, which affects how many signals can be sampled without an external multiplexer. |
| Sampling Rate | 200 kSPS | 200 kSPS | Identical throughput means timing and bandwidth requirements are met by either device. |
| Supply Voltage (Analog and Digital) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Matching supply ranges allow either part to operate in the same system power domain. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Same serial interface protocol ensures firmware and host controller compatibility. |
| Package | 16-lead TSSOP | 20-lead TSSOP | Different package footprints and pin counts prevent direct drop-in replacement on an existing PCB. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Equivalent temperature ratings mean both suit the same environmental conditions. |
| Power Consumption | Typically ~3.5 mW at 5 V, 200 kSPS | Typically ~3.5 mW at 5 V, 200 kSPS | Similar power draw supports comparable thermal and energy budgets in the target design. |
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 | AD7923BRUZ | AD7927BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 200k | 200k |
| Number of Inputs | 4 | 8 |
| Input Type | Single Ended | 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 | External |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7923BRUZ and the AD7927BRU?
The AD7923BRUZ is a 4-channel, 12-bit successive-approximation ADC, while the AD7927BRU is an 8-channel, 12-bit successive-approximation ADC. Both are specified for a 2.7 V to 5.25 V supply and offer throughput rates up to 200 kSPS, but the AD7927 provides twice the number of analog input channels. Both devices are offered in a 20-lead TSSOP package.
Are the AD7923BRUZ and AD7927BRU pin-compatible?
No. Although both devices are housed in a 20-lead TSSOP package, they are not pin-compatible because the AD7927 uses additional pins for its extra analog input channels (CH4 through CH7). The pin functions differ between the two devices, so a direct drop-in replacement on the same PCB layout is not possible without design changes.
What is the resolution and throughput of these ADCs?
Both the AD7923BRUZ and the AD7927BRU are 12-bit successive-approximation analog-to-digital converters with a maximum throughput rate of 200 kSPS. The resolution and conversion speed are identical; the primary distinction is the number of analog input channels (4 versus 8).
What analog input configuration do these devices support?
Both the AD7923BRUZ and the AD7927BRU provide a multiplexed analog input structure that can be configured for single-ended or pseudo-differential operation. The AD7923BRUZ supports four analog input channels, while the AD7927BRU supports eight analog input channels, selectable through the serial interface.
What supply voltage and interface do the AD7923BRUZ and AD7927BRU require?
Both devices operate from a single supply of 2.7 V to 5.25 V and include a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The digital interface allows high-speed data transfer and is common to both parts.
Can the AD7923BRUZ be used as a substitute for the AD7927BRU in an existing design?
Not directly. Because the AD7927BRU provides eight analog input channels and a different pin assignment in the same 20-lead TSSOP package, substituting the AD7923BRUZ would require verifying that only four input channels are needed and that the PCB layout and firmware are adapted to the different pin functions and channel addressing. The substitution should only be made after validation against the respective manufacturer datasheets.
What package do the AD7923BRUZ and AD7927BRU use?
Both the AD7923BRUZ and the AD7927BRU are supplied in a 20-lead TSSOP (Thin Shrink Small Outline Package). The package type is the same, but the pin assignments differ due to the different number of analog input channels.