Part A
AFE5809ZCF
德州儀器
- Lifecycle
- Active
- Stock
- 5909 件
- Package
- NFBGA-135
- Series
- 資料獲取-類比前端（AFE）
Replacement verdict
Compatible functional replacement candidate
The AFE5809ZCF is a functionally compatible replacement candidate for the AFE5808ZCF, sharing the same package, channel count, and supply architecture while adding integrated digital demodulation and continuous-wave Doppler processing. Designers should validate the additional digital signal processing features and confirm firmware compatibility before adopting the AFE5809ZCF in existing AFE5808ZCF sockets.
Package Type
High match
Channel Count
High match
Supply Voltage Architecture
High match
Integrated Digital Signal Processing
Validation required
Parts at a glance
Part B
AFE5808ZCF
德州儀器
- Lifecycle
- Active
- Stock
- 357 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 | AFE5809ZCF | AFE5808ZCF | Why it matters |
|---|---|---|---|
| Number of receive channels | 8 | 8 | Channel count determines how many transducer elements can be processed simultaneously; both are 8-channel devices, so system architecture compatibility is maintained. |
| Integrated CW Doppler mixer | Yes (with digital I/Q demodulation and decimation) | No | The AFE5809 includes an on-chip continuous-wave Doppler mixer with digital I/Q demodulation, eliminating external components for Doppler processing; the AFE5808 lacks this block, so it cannot directly support CW Doppler without additional circuitry. |
| Digital demodulation / decimation | Yes (digital I/Q demodulator with programmable decimation filters) | No | On-chip digital demodulation reduces FPGA/processor load and data rate; the AFE5808 requires external digital processing for the same function. |
| LNA input-referred noise | 0.75 nV/√Hz (typical) | 0.75 nV/√Hz (typical) | Low noise figure directly affects image sensitivity and penetration depth; identical LNA noise means comparable small-signal performance. |
| Maximum LNA gain | 24 dB | 24 dB | Gain range sets the dynamic range handling of the receive chain; matching values ensure similar signal scaling into the VGA and ADC. |
| ADC resolution | 12-bit | 12-bit | ADC bit depth determines quantization noise and dynamic range; both being 12-bit means equivalent digitization performance. |
| ADC sampling rate | Up to 65 MSPS | Up to 65 MSPS | Sample rate limits the maximum signal bandwidth and oversampling ratio; identical rates support the same ultrasound frequency ranges. |
| Supply voltage | 1.8 V (digital), 3.3 V (analog) | 1.8 V (digital), 3.3 V (analog) | Supply rails must match the board power design; identical rails allow drop-in power compatibility. |
| Package | 100-pin NFBGA (ZCF) | 100-pin NFBGA (ZCF) | Package and pinout determine PCB footprint and layout compatibility; identical packages enable hardware substitution without redesign. |
| Power consumption | Approximately 158 mW per channel (typical, with CW Doppler active) | Approximately 128 mW per channel (typical) | Higher power in the AFE5809 reflects the added CW Doppler/demodulation blocks; thermal and power budget planning must account for this difference. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AFE5809ZCF | AFE5808ZCF |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 14 | 12, 14 |
| Number of Channels | 8 | 8 |
| Power (Watts) | 158 mW | 158 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 | 1.7V ~ 1.9V | 1.7V ~ 1.9V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AFE5809ZCF and AFE5808ZCF?
Both are fully integrated analog front-end (AFE) devices from Texas Instruments for ultrasound imaging systems, integrating a low-noise amplifier (LNA), voltage-controlled attenuator (VCA), programmable gain amplifier (PGA), anti-aliasing filter, and 14-bit analog-to-digital converter (ADC) across 8 channels, housed in a 289-ball NFBGA (ZCF) package.
What is the key functional difference between the AFE5809ZCF and AFE5808ZCF?
The AFE5809ZCF integrates an on-chip digital demodulator (IQ demodulator) with a decimation filter, whereas the AFE5808ZCF does not include the demodulation block and provides raw ADC output data. Both share the same analog signal chain and 14-bit ADC architecture.
Are the AFE5809ZCF and AFE5808ZCF pin-to-pin and package compatible?
Yes. Both devices are offered in the same 289-ball NFBGA (ZCF) package with the same pinout, allowing a common PCB footprint. However, firmware and digital output interface configuration differ because the AFE5809ZCF includes the demodulator block.
Do the AFE5809ZCF and AFE5808ZCF share the same ADC resolution and sample rate?
Yes. Both integrate a 14-bit ADC with a maximum sampling rate of 65 MSPS per channel, and both support 8 simultaneous channels, making them suitable for multi-channel ultrasound receive chains.
What digital output interfaces do these devices support?
Both devices provide a low-voltage differential signaling (LVDS) output interface for the ADC data. The AFE5809ZCF additionally outputs demodulated I/Q data through its digital demodulator path, while the AFE5808ZCF outputs the raw 14-bit ADC samples.
Can the AFE5809ZCF replace the AFE5808ZCF in an existing design?
Hardware footprint compatibility exists due to the identical ZCF package and pinout, but replacement requires validating the digital interface, clocking, and firmware, since the AFE5809ZCF adds demodulation functionality and different output data formatting that the system must support.
What are the typical applications for the AFE5809ZCF and AFE5808ZCF?
Both are intended for medical ultrasound imaging systems and similar multi-channel receive applications. The AFE5809ZCF is advantageous where on-chip IQ demodulation reduces FPGA processing load, while the AFE5808ZCF suits designs that perform demodulation in the digital backend.