Part A
AFE5808AZCF
德州儀器
- Lifecycle
- Active
- Stock
- 4985 件
- Package
- NFBGA-135
- Series
- 資料獲取-類比前端（AFE）
Replacement verdict
Compatible functional replacement candidate
The AFE5816ZAV and AFE5808AZCF are both 8-channel ultrasound analog front ends from Texas Instruments sharing a common architecture and 14-bit ADC resolution, making them functionally comparable in many imaging systems. However, differences in package footprint, power consumption, and noise/performance specifications require careful validation before substitution in a given design.
Channel Count
High match
Package Type
Validation required
Power Consumption
Validation required
Noise Performance
Validation required
Parts at a glance
Part B
AFE5816ZAV
德州儀器
- Lifecycle
- Active
- Stock
- 2161 件
- Package
- NFBGA-289
- Series
- 資料獲取-類比前端（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 | AFE5808AZCF | Why it matters |
|---|---|---|---|
| Number of Channels | 16 | 8 | Channel count determines how many transducer elements can be processed simultaneously; a 16-channel device supports twice the array size of an 8-channel device. |
| ADC Resolution | 14 bit | 12 bit | Higher ADC resolution provides greater dynamic range and finer quantization, improving image quality and small-signal detection. |
| Maximum Sampling Rate | 65 MSPS | 65 MSPS | Sampling rate sets the achievable signal bandwidth and axial resolution for ultrasound receive chains. |
| LNA Gain Range | 12 dB to 30 dB | 12 dB to 30 dB | Low-noise amplifier gain range affects sensitivity and the ability to handle both weak and strong echoes without saturating the signal chain. |
| Total Gain Range | 12 dB to 51 dB | 12 dB to 51 dB | Overall gain range determines the dynamic range of the receive path and compatibility with time-gain-compensation profiles. |
| Output Interface | LVDS | LVDS | The digital output interface must match the downstream FPGA or receiver to ensure data can be captured correctly. |
| Package | NFBGA (ZAV) | NFBGA (ZCF) | Package footprint and pinout affect PCB layout and whether the parts are drop-in compatible on an existing board. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Supply rails must match the board power design; mismatches require additional regulation or level shifting. |
| Power Consumption per Channel | Approx. 90 mW | Approx. 90 mW | Per-channel power drives thermal design and battery life in portable ultrasound systems. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AFE5808AZCF | AFE5816ZAV |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12, 14 | 12, 14 |
| Number of Channels | 8 | 16 |
| Power (Watts) | 158 mW | 94 mW |
| Voltage - Supply, Analog | 1.7V ~ 1.9V, 3.15V ~ 3.6V, 5V | 1.7V ~ 2V, 3V ~ 3.3V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V | 1.15V ~ 1.25V, 1.7V ~ 1.9V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AFE5816ZAV and AFE5808AZCF?
The AFE5816ZAV is an 8-channel, fully integrated analog front-end (AFE) for ultrasound systems featuring a 14-bit ADC with a maximum sampling rate of 65 MSPS. The AFE5808AZCF is an 8-channel AFE that integrates a 12-bit ADC with a maximum sampling rate of 65 MSPS. Both devices integrate a low-noise amplifier (LNA), voltage-controlled attenuator (VCA), programmable gain amplifier (PGA), and anti-aliasing filter, but they differ in ADC resolution and specific gain range specifications.
Are the AFE5816ZAV and AFE5808AZCF pin-to-pin compatible?
No. The AFE5816ZAV is supplied in a 289-ball NFBGA package, while the AFE5808AZCF is supplied in a 289-ball NFBGA package with a different ball map and thermal pad configuration. They are not pin-to-pin compatible, and the PCB land patterns and routing must be redesigned if substituting one for the other.
What are the maximum sampling rates and ADC resolutions for these two devices?
The AFE5816ZAV integrates a 14-bit ADC with a maximum sampling rate of 65 MSPS. The AFE5808AZCF integrates a 12-bit ADC with a maximum sampling rate of 65 MSPS. Both devices support LVDS output interfaces for the ADC data.
Do both devices support the same input signal range and gain settings?
No. The AFE5816ZAV features a programmable gain range from 0 dB to 40 dB in the VCA/PGA stage, with an LNA gain of 20 dB. The AFE5808AZCF features a VCA attenuation range of 0 dB to 40 dB and a PGA gain range of 20 dB to 40 dB, with an LNA gain of 20 dB. The total signal chain gain and input-referred noise specifications differ between the two devices, so system-level gain calibration must be recalculated.
Can the AFE5816ZAV and AFE5808AZCF operate from the same power supply voltages?
Yes. Both devices typically operate from a 1.8 V digital supply, a 3.3 V analog supply, and a 5 V supply for the LNA and VCA stages. However, the exact current consumption and power dissipation differ between the two devices, so the power supply design and thermal management must be verified against the respective datasheets.
Which device is better suited for higher dynamic range ultrasound imaging?
The AFE5816ZAV is generally better suited for higher dynamic range applications because its 14-bit ADC provides 4 times the quantization levels of the 12-bit ADC in the AFE5808AZCF. This results in a lower quantization noise floor and improved signal-to-noise ratio (SNR) for weak echo signals, provided the rest of the signal chain is designed to take advantage of the higher resolution.
Are the evaluation tools and reference designs interchangeable between the two AFEs?
No. Texas Instruments provides separate evaluation modules (EVMs) and reference designs for the AFE5816 and AFE5808A families. The register maps, SPI configuration sequences, and FPGA firmware for data capture differ between the two devices, so evaluation hardware and software cannot be used interchangeably without modification.