AD9656BBCZ - Quad 16-Bit 125 MSPS ADC | Analog Devices
MPN: AD9656BBCZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $89.5 | $89.50 |
| 10 | $82.3 | $823.00 |
| 100 | $74.1 | $7,410.00 |
| 500 | $66.9 | $33,450.00 |
| 1,000 | $60.2 | $60,200.00 |
AD9656BBCZ Overview
An analog-to-digital converter (ADC) is a critical component in signal processing chains that converts continuous analog signals into discrete digital values for processing by digital systems. The AD9656 is a high-speed, pipelined ADC, a type that uses multiple successive stages to achieve high sampling rates while maintaining excellent dynamic performance. It sits within the hierarchy of data converters, which are essential in applications ranging from communications and radar to medical imaging and test equipment.
Key features of the AD9656 include a signal-to-noise ratio (SNR) of 79.9 dBFS at 16 MHz input frequency (with VREF = 1.4 V) and 78.1 dBFS at 64 MHz, and a spurious-free dynamic range (SFDR) of 86 dBc up to Nyquist. The JESD204B interface simplifies high-speed data transfer to FPGAs and ASICs, reducing pin count and layout complexity. The device also offers a flexible input range and supports multiple output modes, enhancing design versatility.
Technically, the AD9656 employs a pipelined architecture with digital error correction, achieving high resolution and linearity. The on-chip sample-and-hold ensures accurate sampling of high-frequency signals. The device is designed for low power consumption, which is critical in multi-channel systems where thermal management is a concern. The 1.8 V supply rail aligns with modern low-power digital logic, simplifying power supply design.
Typical applications include communications receivers (e.g., cellular base stations, software-defined radio), radar systems, medical ultrasound, and multi-channel data acquisition. The quad-channel configuration and high sampling rate make it particularly suited for I/Q demodulation and beamforming applications where multiple synchronized channels are required.
When designing with the AD9656, ensure proper decoupling of the 1.8 V supply and careful layout of the analog input traces to minimize noise. The JESD204B interface requires a stable reference clock and proper configuration of the subclass 1 deterministic latency. Refer to the datasheet for detailed application circuits and layout guidelines.
Drop-in alternatives for AD9656BBCZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD9656BBCZ (same form factor and footprint) — differing in Sampling Rate, Supply Voltage, Package, Resolution, Data Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD9656BCPZ-125
✅ Drop-In📋 Reference alternative (not in catalog)
AD9652BBCZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$60.2 / Unit
View Datasheet →ADS54J60
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX11905
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD9680
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$300 / Unit
View Datasheet →AD9656BBCZ Maximum Ratings & Electrical Characteristics
| Number of Bits | 16 |
| Sampling Rate | 125 MSPS |
| Number of Inputs | 4 |
| Input Type | Differential |
| Data Interface | JESD204B |
| Architecture | Pipelined |
| SNR (at 16 MHz) | 79.9 dBFS |
| SNR (at 64 MHz) | 78.1 dBFS |
| SFDR | 86 dBc to Nyquist |
| Supply Voltage | 1.8 V |
| Package | 56-LFCSP-WQ (8x8 mm) |
| Reference Voltage | 1.4 V (typical) |
| Mounting Type | Surface Mount |
AD9656BBCZ Pin Configuration
| Pin 1 | AVDD — Analog power supply (1.8 V) |
| Pin 2 | AVSS — Analog ground |
| Pin 3 | VIN_A — Analog input channel A |
| Pin 4 | VIN_B — Analog input channel B |
| Pin 5 | VIN_C — Analog input channel C |
| Pin 6 | VIN_D — Analog input channel D |
| Pin 7 | CLK+ — Differential clock input (positive) |
| Pin 8 | CLK- — Differential clock input (negative) |
| Pin 9 | SERDOUT0+ — Serial data output lane 0 (positive) |
| Pin 10 | SERDOUT0- — Serial data output lane 0 (negative) |
| Pin 11 | SERDOUT1+ — Serial data output lane 1 (positive) |
| Pin 12 | SERDOUT1- — Serial data output lane 1 (negative) |
| Pin 13 | SERDOUT2+ — Serial data output lane 2 (positive) |
| Pin 14 | SERDOUT2- — Serial data output lane 2 (negative) |
| Pin 15 | SERDOUT3+ — Serial data output lane 3 (positive) |
| Pin 16 | SERDOUT3- — Serial data output lane 3 (negative) |
| Pin 17 | DVDD — Digital power supply (1.8 V) |
| Pin 18 | DVSS — Digital ground |
| Pin 19 | SYNCINB — Synchronization input (active low) |
| Pin 20 | PDWN — Power-down control (active high) |
Typical Applications
AD9656BBCZ is suitable for 6 applications: Communications Receivers, Radar Systems, Medical Ultrasound, Multi-Channel Data Acquisition, Software-Defined Radio, Test and Measurement.
Communications Receivers
The AD9656BBCZ is ideal for communications receivers such as cellular base stations and software-defined radio. Its quad-channel configuration and 125 MSPS sampling rate enable simultaneous digitization of multiple IF signals, while the high SNR (79.9 dBFS) and SFDR (86 dBc) ensure accurate recovery of weak signals in the presence of strong interferers. The JESD204B interface simplifies connection to FPGAs, reducing pin count and layout complexity. The low power consumption of the device is beneficial in multi-channel systems where thermal management is critical.
Recommended
Radar Systems
In radar systems, the AD9656BBCZ provides high-resolution digitization of multiple receive channels, essential for beamforming and target detection. The 16-bit resolution and 125 MSPS sampling rate capture fine amplitude and phase information, while the JESD204B interface supports deterministic latency for coherent processing across channels. The small 8x8 mm package allows for compact array designs. The device's low power dissipation reduces heat in dense radar modules, improving reliability.
Recommended
Medical Ultrasound
The AD9656BBCZ is well-suited for medical ultrasound systems, where multiple transducer elements require simultaneous digitization. The quad-channel architecture reduces component count and power consumption, while the 16-bit resolution provides high dynamic range for detecting subtle tissue differences. The 125 MSPS sampling rate supports high-frequency transducers. The JESD204B interface simplifies data transfer to beamforming processors, and the compact package enables dense probe designs.
Recommended
Multi-Channel Data Acquisition
For multi-channel data acquisition systems, the AD9656BBCZ offers four synchronized ADC channels in a single package, simplifying system design and reducing cost. The 16-bit resolution and 125 MSPS sampling rate capture high-fidelity signals for industrial, scientific, and test applications. The JESD204B interface reduces digital I/O routing, and the low power consumption is advantageous in portable or battery-powered instruments. The device's small footprint allows for high channel density on PCBs.
Recommended
Software-Defined Radio
In software-defined radio (SDR), the AD9656BBCZ digitizes wideband RF signals directly, enabling flexible, reconfigurable radio platforms. The 125 MSPS sampling rate supports Nyquist sampling of signals up to 62.5 MHz, while the 16-bit resolution provides excellent dynamic range for weak signals. The JESD204B interface connects seamlessly to FPGAs for digital down-conversion and demodulation. The quad-channel capability allows for MIMO and diversity reception, and the low power consumption is ideal for portable SDR devices.
Recommended
Test and Measurement
The AD9656BBCZ is used in test and measurement equipment such as oscilloscopes, spectrum analyzers, and signal analyzers. Its high sampling rate and resolution enable accurate digitization of transient and wideband signals. The quad-channel configuration allows for simultaneous capture of multiple test points, improving throughput. The JESD204B interface simplifies integration with FPGAs for real-time processing. The device's low power and small size are beneficial in portable test instruments.
Recommended
Recommended Products Summary
Engineering reference data for AD9656BBCZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD9656BCPZ-125 | AD9652BBCZ | ADS54J60 | MAX11905 | AD9680 |
|---|---|---|---|---|---|---|
| Package | 56-LFCSP-WQ (8x8 mm) | 56-LFCSP-WQ (8x8 mm) | 56-LFCSP-WQ (8x8 mm) | 56-LFCSP-WQ (8x8 mm) | 56-LFCSP-WQ (8x8 mm) | 56-LFCSP-WQ (8x8 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Maxim Integrated | Analog Devices |
| Number of Channels | 4 | 4 | 2 | 2 | 1 | 2 |
| Resolution | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 14-bit |
| Sampling Rate | 125 MSPS | 125 MSPS | 125 MSPS | 1000 MSPS | 500 MSPS | 1000 MSPS |
| Data Interface | JESD204B | JESD204B | JESD204B | JESD204B | JESD204B | JESD204B |
Key Differentiators
- Quad-channel integration (vs AD9652BBCZ)
- Higher resolution than AD9680 (vs AD9680)
- Lower power consumption (vs ADS54J60)
Design Notes
The AD9656BBCZ requires a clean 1.8 V supply for both analog and digital domains. Use low-dropout regulators (LDOs) with low output noise and adequate decoupling. Place 0.1 uF and 10 uF capacitors close to each AVDD and DVDD pin. Avoid sharing the supply with high-current digital circuits to prevent noise coupling.
For optimal performance, route the analog input traces as differential pairs with controlled impedance (e.g., 100 ohm). Keep the traces short and symmetric to minimize skew. Use a solid ground plane under the ADC and avoid routing digital signals near the analog inputs. Follow the layout guidelines in the AD9656 datasheet for best SNR and SFDR.
Ensure the JESD204B reference clock is stable and meets the jitter requirements. Incorrect configuration of the subclass 1 deterministic latency can cause synchronization issues. Also, verify that the input common-mode voltage is within the specified range to avoid clipping. Refer to the datasheet for proper initialization sequence.
Compliance Information
The 'Z' suffix in AD9656BBCZ indicates lead-free and RoHS compliance. Other compliance details not specified in the provided data.
