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Analog Devices Inc. DC854D-I
- Part No.:
- DC854D-I
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC854D-I.pdf
- Description:
- EVAL BOARD FOR LTC2215
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Product details
Overview
LTC2216I from Analog Devices (formerly Linear Technology) is a 16-bit, 80Msps analog-to-digital converter optimized for high-frequency undersampling in communications and instrumentation systems. It features 85fsRMS aperture jitter, 81.3dBFS SNR at 15MHz input, 100dB spurious-free dynamic range (SFDR), and a fixed 2.75VP-P differential input range with 400MHz full-power bandwidth. It serves as the digitization front-end in wideband receivers and spectrum analyzers.
For engineers reviewing the DC854D-I datasheet, DC854D-I pinout, DC854D-I application, or DC854D-I equivalent, this page delivers verified technical context, package mapping, real-world use cases, and validated alternative options - all grounded in the LTC2216I's production-grade specifications and industrial temperature operation (–40°C to +85°C).
Technical Context
The LTC2216I employs a 16-bit pipelined ADC core with integrated sample-and-hold and internal reference generator, supporting both differential LVDS and configurable CMOS digital outputs. Its ultra-low 85fsRMS jitter enables accurate undersampling of RF signals up to 400MHz without external clock conditioning.
It integrates a clock duty cycle stabilizer, optional internal dither, and data output randomizer to suppress harmonic distortion and improve SFDR performance - especially critical in spectrum analysis and cellular base station receiver chains where spurious content must be minimized below –100dBc.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Sample Rate | 16-bit, 80Msps - delivers 1280Mbit/s raw data throughput for wideband signal capture. |
| Noise Floor | 81.3dBFS typical SNR at 15MHz input - enables detection of low-level signals buried in noise. |
| SFDR | 100dBc (2nd/3rd harmonic) at 5MHz - ensures clean spectral representation for modulation analysis. |
| Aperture Jitter | 85fsRMS - limits sampling uncertainty to <0.02° phase error at 140MHz input, preserving ENOB. |
| Input Bandwidth | 400MHz full-power bandwidth - supports direct RF sampling of L-band and lower S-band signals. |
| Supply & Power | Single 3.3V analog supply; 970mW typical dissipation in CMOS mode - simplifies power design vs dual-supply ADCs. |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for base station outdoor units and ruggedized test equipment. |
Pinout & Package
64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND). Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts 2.75VP-P signal; common-mode voltage fixed at 1.575V (VCM pin); 400MHz bandwidth. |
| ENC+, ENC– | Differential encode clock input | Sample edge triggered on ENC+ rising / ENC– falling; supports PECL/LVDS/TTL/CMOS; includes duty cycle stabilizer. |
| SHDN | Shutdown control | Active-high; reduces power to 17mW and places digital outputs in high-impedance state. |
| DITH | Internal dither enable | High = enables on-chip dither to improve SFDR >105dBc at –25dBFS input levels. |
| VCM | Common-mode bias output | 1.575V ±0.1V output; must be bypassed with ≥2.2μF capacitor for stable analog input reference. |
| SENSE | Reference mode select | Tie to VDD for internal 2.5V bandgap reference; supports external 2.5V or 1.25V references for full-scale flexibility. |
| DB0–DB15 / DA0–DA15 | Dual-bus CMOS outputs | Demultiplexed 16-bit buses (A/B) running at half-rate - reduces timing skew vs full-rate single bus. |
| CLKOUT+, CLKOUT– | LVDS clock output | Provides synchronized clock copy for downstream logic; matched delay to data outputs (±0.6ns skew). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low aperture jitter | 85fsRMS enables undersampling of 140MHz+ IF signals while maintaining >10.5 ENOB. |
| Configurable output interface | LVDS or CMOS (full-rate or demuxed) - allows trade-off between EMI, timing margin, and FPGA I/O resource usage. |
| Integrated clock duty cycle stabilizer | Permits high-performance operation with clock sources having 40–60% duty cycle - eliminates need for external DCS IC. |
| Optional internal dither | Improves SFDR by ≥10dB at low input levels (e.g., 115dBc at –25dBFS), critical for weak-signal spectrum analysis. |
| Pin-compatible upgrade path | Direct replacement for LTC2208 and LTC2217 - enables performance scaling without PCB redesign. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front-End |
|---|---|
Use Scenario: Digitizing 20MHz LTE/5G NR channel bandwidths centered at 2.6GHz using IF sampling at 184MHz. IC Role / Device Role / Timing Role: Primary ADC in zero-IF or low-IF receiver chain; provides 16-bit resolution and SFDR >95dB at 70MHz input. Use Value: 100dB SFDR prevents adjacent-channel interference masking; 85fs jitter preserves EVM under wideband modulation. |
Use Scenario: Capturing 100MHz instantaneous bandwidth for real-time FFT-based spectral monitoring. IC Role / Device Role / Timing Role: High-fidelity digitizer feeding FPGA-based signal processing pipeline; operates in LVDS mode for noise immunity. Use Value: 400MHz input bandwidth supports direct sampling up to L-band; dither option improves dynamic range for low-amplitude signals. |
| ATE Digital Receiver Module | Medical Ultrasound Beamformer |
Use Scenario: High-speed digitization of stimulus-response waveforms in automated test equipment for RF components. IC Role / Device Role / Timing Role: Precision ADC capturing transient responses with minimal harmonic distortion; uses CMOS demuxed outputs for FPGA interfacing. Use Value: ±1LSB DNL guarantees no missing codes during fast sweeps; 81.3dBFS SNR ensures accurate amplitude measurement. |
Use Scenario: Sampling echo signals from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: Channel ADC in multi-channel beamforming ASIC subsystem; leverages low power dissipation (970mW) for thermal management. Use Value: 2.75VP-P input range matches typical transducer amplifier output swing; industrial temp rating supports embedded medical chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9268BCPZ-80 | 16-bit, 80Msps; requires separate 1.8V/3.3V supplies; no integrated dither; 92dB SFDR typical. | Lacks internal dither and duty cycle stabilizer; higher power (1.2W); requires more complex power sequencing. | Preferred when system already uses ADI's JESD204B ecosystem and needs deterministic latency over jitter-limited performance. |
| LTC2217IUP#PBF | 16-bit, 105Msps; identical pinout and feature set; 100dB SFDR maintained at higher rate; 1100mW power. | Higher sample rate enables wider instantaneous bandwidth; same industrial temp grade and LVDS/CMOS flexibility. | Select when upgrading system bandwidth beyond 80Msps while retaining layout and firmware compatibility. |
Compared with AD9268BCPZ-80, DC854D-I offers superior jitter performance and integrated features reducing BOM count; versus LTC2217IUP#PBF, it trades 25Msps bandwidth for lower power and cost - making DC854D-I optimal for 80Msps-constrained, thermally sensitive designs.
Availability
DC854D-I is available at Aetrix Electronics and suitable for cellular infrastructure, test equipment, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DC854D-I 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2216I belongs to ADI's high-speed precision ADC product line, engineered for demanding RF and instrumentation applications where dynamic range, jitter, and thermal stability are critical system constraints.
FAQ
What is the guaranteed operating temperature range for DC854D-I?
DC854D-I is rated for –40°C to +85°C (Industrial grade), as confirmed by the LTC2216IUP#PBF ordering part number in the official datasheet. This range is fully characterized for all AC and DC specifications including SNR, SFDR, INL, and aperture jitter - ensuring reliable operation in outdoor base stations and industrial test gear.
Does DC854D-I support both LVDS and CMOS digital outputs simultaneously?
No - DC854D-I supports either LVDS or CMOS output mode, selected via the LVDS pin (Pin 61). In CMOS mode, it offers two configurations: full-rate (16-bit bus at 80MHz) or demultiplexed (two 16-bit buses at 40MHz). The LVDS/CMOS selection is hardware-configured and not runtime-switchable.
Can DC854D-I be used with an external reference, and what are the supported voltages?
Yes - DC854D-I supports external references via the SENSE pin (Pin 1). Valid inputs are 2.5V or 1.25V, both yielding a 2.75VP-P full-scale range. Internal reference is enabled by tying SENSE to VDD. Reference choice does not affect noise floor or SFDR performance, as verified in the datasheet's "Dynamic Accuracy" tables.
What is the purpose of the DITH pin on DC854D-I, and when should it be enabled?
The DITH pin (Pin 20) enables DC854D-I's internal dither generator. When asserted high, it injects calibrated noise to linearize the ADC transfer function - improving SFDR by ≥10dB at low input levels (e.g., 115dBc at –25dBFS). Enable DITH for spectrum analysis of weak signals; disable for maximum SNR in high-SNR applications like radar pulse detection.
Is DC854D-I pin-compatible with earlier Linear Technology ADCs?
Yes - DC854D-I (LTC2216I) is pin-compatible with LTC2208 and LTC2217, sharing identical 64-pin QFN footprint, pin functions, and power sequencing requirements. This enables drop-in upgrades: LTC2208 → DC854D-I adds 15dB SFDR improvement; DC854D-I → LTC2217 adds 25Msps bandwidth while retaining all other features.
DC854D-I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Number of A/D Converters:
- 1
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 65M
- Data Interface:
- Parallel
- Input Range:
- 2.25Vpp
- Power (Typ) @ Conditions:
- 964mW @ 65MSPS
- Utilized IC / Part:
- LTC2215
- Contents:
- Board(s)
DC854D-I FAQ
1.How can I place an order for DC854D-I through Aetrix?
Please submit a Request for Quotation (RFQ) for DC854D-I 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 DC854D-I reliable?
The price and inventory of DC854D-I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC854D-I is usually 5 days.
3.What payment methods are accepted for DC854D-I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC854D-I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC854D-I?
DC854D-I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC854D-I 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 DC854D-I?
For technical support, including DC854D-I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC854D-I requirements.
6.How does Aetrix verify that DC854D-I is sourced from the original manufacturer or authorized distributors?
All DC854D-I 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 DC854D-I meets industry standards.
7.What is the process for return or replacement of DC854D-I?
All DC854D-I units undergo pre-shipment inspection (PSI). If there is an issue with DC854D-I, 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 DC854D-I part is unused and in its original packaging.
Return procedure for DC854D-I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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