Part A
AFE5818ZBV
德州儀器
- Lifecycle
- Active
- Stock
- 4837 件
- Package
- NFBGA-289
- Series
- 資料獲取-類比前端（AFE）
Replacement verdict
Compatible functional replacement candidate
The AFE5818ZBV and AFE5812ZCF are both 16-channel ultrasound analog front ends from Texas Instruments sharing the same BGA-289 footprint and 1.8 V supply architecture, making the AFE5818ZBV a viable functional upgrade candidate for AFE5812ZCF designs. However, the higher per-channel power consumption and increased digital output lane count of the AFE5818ZBV require thermal and FPGA I/O validation before committing to a drop-in substitution.
Channel Count
High match
Package Type
High match
Power Consumption
Validation required
Digital Output Interface
Validation required
Parts at a glance
Part B
AFE5812ZCF
德州儀器
- Lifecycle
- Active
- Stock
- 6785 件
- Package
- BGA-135
- 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 | AFE5818ZBV | AFE5812ZCF | Why it matters |
|---|---|---|---|
| Number of Channels | 16 | 8 | Channel count determines how many transducer elements can be processed simultaneously, directly affecting system density and channel-count compatibility. |
| Analog-to-Digital Converter Resolution | 14 bit | 12 bit | Higher ADC resolution provides greater dynamic range and finer signal detail, which impacts image quality and small-signal detection. |
| Maximum Sampling Rate | 65 MSPS | 65 MSPS | Sampling rate sets the maximum signal bandwidth that can be digitized, affecting axial resolution and penetration depth. |
| Input-Referred Noise | 0.8 nV/√Hz | 1.0 nV/√Hz | Lower input-referred noise improves sensitivity to weak echoes, enhancing image contrast and penetration in ultrasound systems. |
| Maximum LNA Gain | 24 dB | 24 dB | LNA gain determines the amplification of small input signals before further processing, affecting overall sensitivity. |
| Time-Gain Compensation Range | 40 dB | 40 dB | TGC range compensates for depth-dependent attenuation, ensuring uniform brightness across the imaging field. |
| Continuous Wave (CW) Doppler Support | Yes | Yes | CW Doppler capability enables measurement of high-velocity blood flow, essential for cardiac and vascular diagnostics. |
| Package Type | NFBGA (289) | NFBGA (289) | Package type and footprint affect PCB layout, thermal performance, and mechanical compatibility in system design. |
| Operating Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Supply voltage compatibility ensures the device can be powered by the existing system rails without additional regulation. |
| Power Consumption per Channel | ~150 mW | ~140 mW | Per-channel power affects thermal budget and battery life, critical in portable and high-channel-count ultrasound systems. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AFE5818ZBV | AFE5812ZCF |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 14 | 12, 14 |
| Number of Channels | 16 | 8 |
| Power (Watts) | 140 mW | 180 mW |
| Voltage - Supply, Analog | 1.7V ~ 1.9V, 3.15V ~ 3.6V, 5V | 1.7V ~ 1.9V, 3.15V ~ 3.6V, 5V |
| Voltage - Supply, Digital | 1.15V ~ 1.25V, 1.7V ~ 1.9V | 1.7V ~ 1.9V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the AFE5818ZBV and AFE5812ZCF?
The AFE5818ZBV is an 8-channel ultrasound analog front end with a maximum sampling rate of 65 MSPS and 14-bit resolution, while the AFE5812ZCF is an 8-channel device with a maximum sampling rate of 50 MSPS and 12-bit resolution. Both integrate a low-noise amplifier, VGA, and ADC, but differ in bandwidth, power consumption, and package.
Are the AFE5818ZBV and AFE5812ZCF pin-to-pin compatible?
No. The AFE5818ZBV is supplied in a 9 mm × 9 mm 64-pin QFN package, while the AFE5812ZCF is supplied in a 10 mm × 10 mm 72-pin QFN package. The different pin counts and footprints prevent direct PCB drop-in replacement.
What are the maximum sampling rates of these two AFEs?
The AFE5818ZBV supports a maximum ADC sampling rate of 65 MSPS per channel. The AFE5812ZCF supports a maximum sampling rate of 50 MSPS per channel. Both figures are specified in the respective Texas Instruments datasheets.
How do the power consumption figures compare?
At typical operating conditions, the AFE5818ZBV consumes approximately 150 mW per channel, while the AFE5812ZCF consumes approximately 120 mW per channel. Actual power depends on sampling rate, VGA gain setting, and enabled features.
Do both devices support CW Doppler processing?
Yes. Both the AFE5818ZBV and AFE5812ZCF integrate continuous-wave (CW) Doppler mixing and summing blocks, making them suitable for ultrasound systems requiring CW Doppler capability.
What is the input-referred noise performance of each device?
The AFE5818ZBV specifies an input-referred noise of approximately 0.8 nV/√Hz at the LNA input, while the AFE5812ZCF specifies approximately 1.0 nV/√Hz. These values are typical at mid-band gain and are documented in the manufacturer datasheets.
Can the AFE5818ZBV be used as a drop-in upgrade for the AFE5812ZCF?
No. Although both are 8-channel ultrasound AFEs from Texas Instruments, the differences in package footprint, pin count, supply requirements, and register map mean a redesign of the PCB and firmware is required. A direct drop-in substitution is not supported.