Part A
AFE5818ZBV
Техасские инструменты
- Lifecycle
- Active
- Stock
- 4837 ПКС
- Package
- NFBGA-289
- Series
- Сбор данных - аналоговый фронт-энд (AFE)
Replacement verdict
Compatible functional replacement candidate
The AFE5818ZBV and AFE5803ZCF are both integrated analog front-end (AFE) devices for ultrasound signal chains, but they differ in channel count, package footprint, and power profile. The AFE5818ZBV offers a higher channel count and a different package, so it is not a pin-for-pin drop-in replacement for the AFE5803ZCF; however, both share a compatible functional role in ultrasound receive paths, making the AFE5818ZBV a viable functional candidate only after validating channel mapping, package footprint, and thermal/power constraints against the target design.
Channel Count
Validation required
Package Type
Not compatible
Power Consumption
Validation required
Functional Role
High match
Parts at a glance
Part B
AFE5803ZCF
Техасские инструменты
- Lifecycle
- Active
- Stock
- 9647 ПКС
- Package
- BGA-135
- Series
- Сбор данных - аналоговый фронт-энд (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 | AFE5803ZCF | Why it matters |
|---|---|---|---|
| Number of Channels | 16 | 8 | Channel count determines how many transducer elements can be processed simultaneously, directly affecting system density and imaging architecture. |
| ADC 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 bandwidth and timing resolution of the receive path; matching rates simplify timing design when substituting parts. |
| LNA Gain Range | 12 dB to 30 dB | 12 dB to 30 dB | Low-noise amplifier gain range determines sensitivity and noise performance for weak echo signals in the receive chain. |
| Total Power Consumption | Approximately 1.1 W (typical, full 16 channels) | Approximately 0.6 W (typical, full 8 channels) | Power consumption affects thermal design and battery life in portable ultrasound systems; per-channel power is a key selection criterion. |
| Package Type | NFBGA (ZBV) | NFBGA (ZCF) | Package footprint and pinout must be compatible with the PCB layout for a drop-in or redesign substitution. |
| Interface Type | LVDS serial output | LVDS serial output | Output interface compatibility determines whether the downstream FPGA or receiver can accept the data stream without rework. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation across environmental conditions in medical and industrial imaging equipment. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AFE5818ZBV | AFE5803ZCF |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 14 | 14 |
| Number of Channels | 16 | 8 |
| Power (Watts) | 140 mW | 190 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 functional differences between the AFE5818ZBV and AFE5803ZCF?
The AFE5818ZBV 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 AFE5803ZCF is an 8-channel AFE with a 12-bit ADC and a maximum sampling rate of 50 MSPS. The AFE5818ZBV offers higher resolution and a faster ADC conversion rate, while both integrate a low-noise amplifier (LNA), voltage-controlled attenuator (VCA), programmable gain amplifier (PGA), and anti-aliasing filter.
Are the AFE5818ZBV and AFE5803ZCF pin-to-pin or package compatible?
No. The AFE5818ZBV is supplied in a 9 mm × 9 mm, 64-pin QFN package (ZBV suffix), while the AFE5803ZCF is supplied in a 9 mm × 9 mm, 64-pin QFN package (ZCF suffix). Although both use a 64-pin QFN outline, the pin assignments and internal signal routing differ between the two devices, so they are not drop-in replacements. PCB layout and pin function verification against the respective datasheets are required before any substitution.
How do the ADC resolution and sampling rates compare between the two devices?
The AFE5818ZBV integrates a 14-bit ADC with a maximum sampling rate of 65 MSPS per channel. The AFE5803ZCF integrates a 12-bit ADC with a maximum sampling rate of 50 MSPS per channel. The higher bit depth and faster sampling of the AFE5818ZBV provide greater dynamic range and finer temporal resolution, which can benefit higher-frequency ultrasound imaging modes.
Do both devices integrate the same signal chain blocks (LNA, VCA, PGA, AAF)?
Yes. Both the AFE5818ZBV and AFE5803ZCF integrate an 8-channel signal chain consisting of a low-noise amplifier (LNA), a voltage-controlled attenuator (VCA), a programmable gain amplifier (PGA), and an anti-aliasing filter (AAF) ahead of the ADC. The architectural blocks are functionally equivalent, but the specific gain ranges, noise performance, and bandwidth specifications differ and must be compared using the respective manufacturer datasheets.
What are the typical power consumption differences between the AFE5818ZBV and AFE5803ZCF?
The AFE5818ZBV, with its higher-resolution 14-bit ADC and 65 MSPS capability, typically consumes more power per channel than the AFE5803ZCF, which uses a 12-bit ADC at 50 MSPS. Designers should consult the official Texas Instruments datasheets for the exact per-channel and total power figures under specified operating conditions, as power scales with sampling rate and channel configuration.
Can the AFE5803ZCF be used as a direct replacement for the AFE5818ZBV in an existing design?
No. Because the two devices differ in ADC resolution (12-bit vs. 14-bit), maximum sampling rate (50 MSPS vs. 65 MSPS), and pin assignments within the 64-pin QFN package, a direct replacement is not possible without redesign. System-level impacts on dynamic range, timing, FPGA interface width, and PCB layout must be evaluated against the target design requirements and the manufacturer datasheets.
Which device is better suited for higher-channel-count or higher-performance ultrasound systems?
The AFE5818ZBV is generally better suited for higher-performance ultrasound systems that require greater dynamic range and faster sampling, owing to its 14-bit ADC at 65 MSPS. The AFE5803ZCF, with a 12-bit ADC at 50 MSPS, is appropriate for cost- and power-sensitive systems where the lower resolution and sampling rate meet the imaging requirements. Selection should be based on verified datasheet parameters for noise, bandwidth, and power against the system specification.