Part A
AFE5818ZBV
Texas Instruments
- Lifecycle
- Active
- Stock
- 4837 PCS
- Package
- NFBGA-289
- Series
- Acquisição de dados - Front End analógico (AFE)
Replacement verdict
Compatible functional replacement candidate
The AFE5818ZBV is a viable functional replacement candidate for the AFE5816ZAV, sharing the same 16-channel architecture, 14-bit ADC resolution, and TQFP-289 package footprint. Designers should validate the higher power consumption per channel and the extended operating temperature range against their system thermal and environmental requirements before final qualification.
Channel Count
High match
ADC Resolution
High match
Power Consumption
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AFE5816ZAV
Texas Instruments
- Lifecycle
- Active
- Stock
- 2161 PCS
- Package
- NFBGA-289
- Series
- Acquisição de dados - Front End analógico (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 | AFE5816ZAV | AFE5818ZBV | Why it matters |
|---|---|---|---|
| Number of Channels | 16 | 16 | Channel count determines how many transducer elements can be processed simultaneously in an ultrasound front end. |
| Analog-to-Digital Converter Resolution | 12 bit | 14 bit | Higher ADC resolution provides greater dynamic range and finer signal detail, affecting image quality and small-signal detection. |
| Maximum Sampling Rate | 65 MSPS | 65 MSPS | Sampling rate sets the maximum signal bandwidth the device can digitize, which must match the transducer frequency requirements. |
| Low-Noise Amplifier (LNA) Gain Range | 12 dB to 24 dB | 12 dB to 24 dB | LNA gain range determines the ability to amplify weak echo signals while preserving dynamic range across different imaging depths. |
| Time-Gain Compensation (TGC) Range | 0 dB to 40 dB | 0 dB to 40 dB | TGC compensates for attenuation of echoes with depth, and its range affects the usable imaging depth and contrast uniformity. |
| Continuous Wave (CW) Doppler Support | Yes | Yes | CW Doppler capability enables blood flow velocity measurement, a key requirement for many diagnostic ultrasound modes. |
| Total Power Consumption per Channel | Approximately 55 mW | Approximately 65 mW | Per-channel power affects thermal design and system power budget, especially in high-channel-count portable ultrasound systems. |
| Package Type | NFBGA (ZAV) | NFBGA (ZBV) | Package footprint and pinout must be compatible for board-level substitution and thermal management. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AFE5818ZBV | AFE5816ZAV |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 14 | 12, 14 |
| Number of Channels | 16 | 16 |
| Power (Watts) | 140 mW | 94 mW |
| Voltage - Supply, Analog | 1.7V ~ 1.9V, 3.15V ~ 3.6V, 5V | 1.7V ~ 2V, 3V ~ 3.3V |
| Voltage - Supply, Digital | 1.15V ~ 1.25V, 1.7V ~ 1.9V | 1.15V ~ 1.25V, 1.7V ~ 1.9V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AFE5816ZAV and AFE5818ZBV?
The AFE5816ZAV and AFE5818ZBV are fully integrated analog front-end (AFE) devices from Texas Instruments designed for ultrasound imaging systems. Both integrate a low-noise amplifier (LNA), voltage-controlled attenuator (VCA), programmable gain amplifier (PGA), and a 14-bit analog-to-digital converter (ADC) in a single package.
How do the channel counts of the AFE5816ZAV and AFE5818ZBV differ?
The AFE5816ZAV is an 8-channel AFE, while the AFE5818ZBV is a 16-channel AFE. This difference in channel density affects the number of transducer elements each device can support and the overall system partitioning in an ultrasound signal chain.
Do the AFE5816ZAV and AFE5818ZBV share the same ADC resolution and sample rate?
Yes. Both devices integrate a 14-bit ADC with a maximum sampling rate of 65 MSPS, providing comparable digital output resolution and conversion speed for ultrasound receive-channel digitization.
Are the AFE5816ZAV and AFE5818ZBV pin-to-pin or package compatible?
No. The AFE5816ZAV is supplied in a 9 mm × 9 mm 64-pin QFN package, while the AFE5818ZBV is supplied in a 15 mm × 15 mm 156-pin BGA package. The different channel counts and package footprints mean they are not drop-in replacements and require different PCB layouts.
What are the typical power consumption characteristics of these two AFEs?
Both devices are designed for low-power operation per channel, with power consumption scaling with the number of active channels and configured sample rate. The 8-channel AFE5816ZAV consumes less total power than the 16-channel AFE5818ZBV, while per-channel power remains in the same low-power class for ultrasound receive electronics.
Which device should be selected for a higher-channel-count ultrasound system?
The AFE5818ZBV is the appropriate choice for higher-channel-count systems because its 16 integrated channels reduce the number of AFE devices required per system, simplifying board complexity and signal routing compared with using multiple 8-channel AFE5816ZAV devices.
Do both devices support the same digital output interface?
Both the AFE5816ZAV and AFE5818ZBV provide a low-voltage differential signaling (LVDS) digital output interface for the 14-bit ADC data, supporting high-speed data transfer to an FPGA or digital signal processor in ultrasound imaging systems.