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Analog Devices Inc. AD9681BBCZ-125
- Part No.:
- AD9681BBCZ-125
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 144-LFBGA, CSPBGA
- Datasheet:
-
AD9681BBCZ-125.pdf
- Description:
- IC ADC 14BIT PIPELINED 144CSPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,251
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Product details
Overview
AD9681BBCZ-125 from Analog Devices is an octal, 14-bit, 125 MSPS serial LVDS analog-to-digital converter operating from a single 1.8 V supply, delivering 74 dBFS SNR and 90 dBc SFDR at Nyquist, with 650 MHz full-power analog bandwidth and integrated sample-and-hold - deployed in multichannel medical imaging and communications receivers.
For engineers reviewing the AD9681BBCZ-125 datasheet, AD9681BBCZ-125 pinout, AD9681BBCZ-125 application, or AD9681BBCZ-125 equivalent, key selection criteria include per-channel power (110 mW at 125 MSPS), LVDS output compliance (ANSI-644 or reduced-signal mode), programmable clock/data alignment, built-in test pattern generation, and industrial temperature range (−40°C to +85°C) support.
Technical Context
The AD9681BBCZ-125 implements eight parallel pipeline ADC cores with on-chip digital serializers, each supporting 12- or 16-bit DDR/SDR LVDS output across two lanes per channel pair. Clock management includes internal multiplication for LVDS data rate synchronization and configurable frame/data clock outputs (FCO±1/2, DCO±1/2).
It features programmable digital test patterns (deterministic, pseudorandom, user-defined), SPI-controlled configuration of gain/offset calibration, clock/data alignment, and power modes (standby: 485 mW; full power-down: 2 mW). Input interface accepts 2 V p-p differential signals with 0.5–1.3 V common-mode range and supports LVPECL/LVDS/CMOS clock inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonicity and no missing codes over full industrial temperature range. |
| Sampling Rate | 125 MSPS - maximum sustained conversion rate with full AC performance (SNR ≥72.6 dBFS up to 69.5 MHz input). |
| SNR / SFDR | 74 dBFS / 90 dBc at Nyquist - enables high-fidelity signal capture in wideband receiver front-ends. |
| Analog Bandwidth | 650 MHz - supports direct RF sampling of L-band and lower S-band signals without external amplification. |
| Power Consumption | 988 mW total (eight channels, ANSI-644 LVDS mode) - scalable to 825 mW using reduced-signal LVDS option. |
| DNL / INL | ±0.8 LSB / ±1.2 LSB typical - ensures accurate amplitude representation in precision measurement systems. |
| Aperture Jitter | 135 fs rms - minimizes sampling uncertainty for high-frequency input signals. |
Pinout & Package
The AD9681BBCZ-125 is housed in a RoHS-compliant, 144-ball CSP-BGA package (10 mm × 10 mm), with 1.0 mm ball pitch and exposed thermal pad. Pin functions are defined per Analog Devices Rev. D datasheet Figure 10 and Table 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+A1/VIN−A1 VIN+A2/VIN−A2 ... VIN+D1/VIN−D1 VIN+D2/VIN−D2 | Differential analog inputs (8 channels, 2 per bank) | Accepts 2 V p-p differential signals; supports 0.5–1.3 V common-mode voltage; 5.2 kΩ input resistance. |
| CLK+/CLK− | Differential clock input | LVPECL/LVDS/CMOS-compatible; 10–1000 MHz range; 4 ns minimum pulse width. |
| D0±A1/D1±A1 D0±A2/D1±A2 ... D0±D1/D1±D1 D0±D2/D1±D2 | LVDS serialized digital outputs (two-lane per channel) | ANSI-644 compliant (290–400 mV VOD) or low-power mode (160–230 mV VOD); twos-complement coding. |
| DCO±1/DCO±2 FCO±1/FCO±2 | Data and frame clock outputs | DDR-capable up to 500 MHz; used for synchronous capture of serialized data; programmable delay alignment via SPI. |
| CSB1/CSB2 SCLK/DTP SDIO/OLM | Serial port interface (SPI) | 4-wire SPI (CSB, SCLK, SDIO, OLM) for register configuration, calibration, and test pattern control. |
| PDWN/SYNC | Power-down and synchronization control | Asynchronous PDWN asserts full device shutdown (2 mW); SYNC aligns internal sampling phases across all eight channels. |
Key Features
| Feature | Design Value |
|---|---|
| Octal integration in 10 mm × 10 mm CSP-BGA | Reduces PCB area by >70% vs. discrete quad ADC solutions while maintaining channel isolation (−83 dB crosstalk). |
| Programmable LVDS output mode | Switches between full-swing ANSI-644 and low-power reduced-signal LVDS to cut driver power by ~25% without sacrificing timing margin. |
| Built-in deterministic test patterns | Enables production-level functional testing without external pattern generators - supports quick validation of serializer integrity and lane alignment. |
| Per-channel power-down | Allows dynamic channel gating in burst-mode acquisition systems, reducing idle power to <2 mW when all channels disabled. |
| Flexible clock/data alignment | SPI-adjustable delays on DCO/FCO paths compensate for board-level skew, enabling reliable DDR capture at 500 MHz without custom layout tuning. |
Applications
| Medical Ultrasound Imaging | Phased Array Radar Receivers |
|---|---|
Use Scenario: Simultaneous digitization of echo return signals from 8 transducer elements in portable ultrasound systems. IC Role / Device Role / Timing Role: Octal ADC captures time-aligned RF echoes with 125 MSPS sampling and 650 MHz bandwidth to preserve harmonic content for beamforming. Use Value: Eliminates need for eight separate ADCs and associated routing, reducing BOM count and improving channel-to-channel timing matching (aperture jitter ≤135 fs rms). | Use Scenario: High-speed digitization of I/Q downconverted radar returns across multiple antenna channels in ground-based surveillance systems. IC Role / Device Role / Timing Role: Provides synchronized 14-bit sampling across eight receive paths with programmable SYNC input to align phase across distributed front-ends. Use Value: Enables coherent multi-channel processing with <±50 ps inter-channel data skew, critical for accurate angle-of-arrival estimation. |
| Software-Defined Radio (SDR) Base Stations | High-Speed Data Acquisition Systems |
Use Scenario: Digitizing multiple 20 MHz LTE carriers simultaneously in compact macrocell or small-cell base station radios. IC Role / Device Role / Timing Role: ADC delivers 74 dBFS SNR at 69.5 MHz input frequency and supports flexible LVDS serialization to match FPGA interface requirements. Use Value: Supports dual-carrier LTE-A with 2×2 MIMO using one device, reducing FPGA I/O count and simplifying clock distribution architecture. | Use Scenario: Capturing transient waveforms from sensor arrays in automated test equipment for aerospace component qualification. IC Role / Device Role / Timing Role: Acts as central digitizer for 8-channel vibration, strain, or acoustic emission monitoring with precise inter-channel timing control. Use Value: Achieves <1 ns aperture uncertainty and <±1.2 LSB INL to meet MIL-STD-810G waveform fidelity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9695-13 | 14-bit, 130 MSPS, JESD204B output (not LVDS); higher power (1.2 W); 75 dBFS SNR at Nyquist | Requires JESD204B-capable FPGA; better suited for high-density backplane interconnects than point-to-point LVDS | Select AD9695-13 when migrating to serial interface standards requiring deterministic latency and lane synchronization. |
| ADC3660IRSBT | 16-bit, 125 MSPS, LVDS output; lower power (640 mW); 77.5 dBFS SNR but only dual-channel (not octal) | Limited to two channels; requires four devices to match AD9681BBCZ-125's channel count, increasing layout complexity | Select ADC3660IRSBT only when resolution priority exceeds channel density and system-level power budget allows multi-device scaling. |
Compared with AD9681BBCZ-125, AD9695-13 trades LVDS simplicity for JESD204B scalability and deterministic latency, while ADC3660IRSBT improves resolution and power efficiency at the cost of channel count and board-level integration density.
Availability
AD9681BBCZ-125 is available at Aetrix Electronics and suitable for medical imaging, communications receivers, and multichannel data acquisition requiring stable component supply, long-term obsolescence planning, and traceable sourcing through authorized channels.
Supply support for AD9681BBCZ-125 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD9681BBCZ-125 belongs to Analog Devices' high-speed data converter product line, engineered for multichannel, space-constrained systems where simultaneous sampling, low power, and LVDS interoperability are critical - especially in portable medical and defense electronics.
FAQ
What is the maximum analog input frequency supported by the AD9681BBCZ-125?
The AD9681BBCZ-125 has a full-power analog bandwidth of 650 MHz, meaning it maintains specified SNR and SFDR performance for input signals up to that frequency. At 301 MHz input, SNR remains 66.6 dBFS and SFDR is 73 dBc - confirming usable RF sampling capability well into L-band. Performance degrades gradually beyond 650 MHz due to front-end roll-off.
Does the AD9681BBCZ-125 require an external reference voltage?
No, the AD9681BBCZ-125 integrates a 1.0 V internal voltage reference with ±2% tolerance (0.98 V to 1.02 V) and 3 mV load regulation at 1.0 mA. External reference is optional and only needed if tighter initial accuracy or lower drift is required; the internal reference supports full specified performance including 74 dBFS SNR and ±1.2 LSB INL.
How many LVDS data lanes does the AD9681BBCZ-125 use per channel?
The AD9681BBCZ-125 uses two LVDS lanes per channel pair in default configuration - e.g., D0±A1/D1±A1 carry Channel A Bank 1 data. Each lane transmits 12 or 16 bits per sample in DDR mode. One-lane operation is configurable via SPI but reduces maximum sample rate and increases per-lane data rate.
Can the AD9681BBCZ-125 operate with a 1.2 V supply?
No. The AD9681BBCZ-125 requires AVDD and DRVDD supplies within 1.7 V to 1.9 V (typical 1.8 V). Operation below 1.7 V violates absolute maximum ratings and causes functional failure - including loss of LVDS output compliance, degraded SNR, and unstable SPI communication. Supply sequencing must follow datasheet recommendations (AVDD before DRVDD).
What is the purpose of the SYNC pin on the AD9681BBCZ-125?
The SYNC pin on the AD9681BBCZ-125 provides asynchronous alignment of sampling phases across all eight ADC cores. When asserted, it resets internal pipeline stages to ensure deterministic latency and precise inter-channel timing - essential for coherent beamforming in ultrasound or phased array radar. Setup/hold timing relative to CLK+ is strictly defined (tSSYNC ≥1.2 ns, tHSYNC ≥−0.2 ns).
AD9681BBCZ-125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 144-LFBGA, CSPBGA
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 125M
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 4
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 144-CSPBGA (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9681BBCZ-125 FAQ
1.How can I place an order for AD9681BBCZ-125 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9681BBCZ-125 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD9681BBCZ-125 reliable?
The price and inventory of AD9681BBCZ-125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9681BBCZ-125 is usually 5 days.
3.What payment methods are accepted for AD9681BBCZ-125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9681BBCZ-125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9681BBCZ-125?
AD9681BBCZ-125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9681BBCZ-125 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD9681BBCZ-125?
For technical support, including AD9681BBCZ-125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9681BBCZ-125 requirements.
6.How does Aetrix verify that AD9681BBCZ-125 is sourced from the original manufacturer or authorized distributors?
All AD9681BBCZ-125 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9681BBCZ-125 meets industry standards.
7.What is the process for return or replacement of AD9681BBCZ-125?
All AD9681BBCZ-125 units undergo pre-shipment inspection (PSI). If there is an issue with AD9681BBCZ-125, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD9681BBCZ-125 part is unused and in its original packaging.
Return procedure for AD9681BBCZ-125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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