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Analog Devices Inc. DC854D-C
- Part No.:
- DC854D-C
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC854D-C.pdf
- Description:
- EVAL BOARD FOR LTC2208-14
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Product details
Overview
LTC2208-14 from Analog Devices (acquired Linear Technology) is a 14-bit, 130Msps analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization up to 700MHz full-power bandwidth. It features a programmable gain amplifier (PGA) front end, 70fsRMS aperture jitter, ±1.5LSB INL, and dual-output flexibility (LVDS or CMOS). It serves as the core ADC in cellular base station receivers requiring undersampling of RF signals with high SFDR.
For engineers reviewing the LTC2208-14 datasheet, LTC2208-14 pinout, LTC2208-14 application, or LTC2208-14 equivalent, key selection considerations include its 130Msps sampling rate, 98dB SFDR at 5MHz, LVDS/CMOS output configurability, PGA-selectable input range (1.5VP-P or 2.25VP-P), and 64-pin QFN package thermal and layout requirements.
Technical Context
The LTC2208-14 employs a pipelined ADC architecture with integrated sample-and-hold and correction logic, supporting both undersampling and baseband acquisition. Its internal 1.25V VCM reference and SENSE pin-controlled internal/external reference selection enable precise analog input biasing across temperature.
Digital interface behavior is defined by three configurable modes: Standard LVDS (350mV differential swing), Low-Power LVDS (175mV), or CMOS (0.5–3.6V OVDD); output format (offset binary or 2's complement) and clock duty cycle stabilization are controlled via MODE and LVDS pins respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels for high-fidelity signal capture |
| Sampling Rate | 130Msps - supports Nyquist-limited bandwidth up to 65MHz or undersampling of IF/RF signals up to 700MHz |
| Noise Floor | 77.1dBFS - enables detection of low-level signals in dense spectral environments |
| SFDR | 98dBc at 5MHz - suppresses harmonics and spurs critical for receiver dynamic range |
| Aperture Jitter | 70fsRMS - limits sampling-time uncertainty, preserving SNR at high input frequencies |
| INL / DNL | ±1.5LSB / ±0.5LSB - ensures monotonicity and accurate transfer function linearity |
| Power Dissipation | 1.32W (CMOS mode) - requires thermal management on PCB with exposed pad soldered to GND |
Pinout & Package
64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts 1.5VP-P or 2.25VP-P full-scale differential signal; common-mode voltage set by internal 1.25V VCM |
| ENC+, ENC– | Differential encode clock input | Sample edge triggered on ENC+ rising / ENC– falling; supports sine, PECL, LVDS, TTL, CMOS drive |
| DA0–DA13, DB0–DB13 | Parallel digital outputs | DA bus active in full-rate CMOS; DB bus active in demultiplexed CMOS; both active in LVDS mode |
| LVDS | Output mode select | 0V = full-rate CMOS; 1/3VDD = demux CMOS; 2/3VDD = LP-LVDS; VDD = standard LVDS |
| MODE | Output format & duty cycle control | Selects offset binary/2's complement and enables/disables clock duty cycle stabilizer |
| PGA | Front-end gain control | Low = 1× gain (2.25VP-P input range); High = 1.5× gain (1.5VP-P input range) |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Configurable 1× or 1.5× front-end gain enables optimal SNR trade-off between input range and noise floor |
| Optional internal dither | Reduces harmonic distortion and improves SFDR >10dB at –25dBFS input when enabled |
| Digital output randomizer | XOR-based bit scrambling minimizes deterministic digital switching noise coupling into analog section |
| Flexible clock interface | Duty cycle stabilizer allows high-performance operation across 40%–60% input clock duty cycles without external conditioning |
| Multiple output standards | Single-part support for LVDS (standard or low-power) and CMOS (full-rate or demux) simplifies system-level I/O compatibility |
Applications
| Cellular Base Station Receivers | Spectrum Analyzers |
|---|---|
Use Scenario: Digitizing 70–250MHz IF signals from multi-carrier GSM/LTE radio front ends under high adjacent-channel interference. IC Role / Device Role / Timing Role: Primary high-speed ADC capturing wide instantaneous bandwidth with minimal spurious content. Use Value: 98dB SFDR and 70fsRMS jitter preserve EVM and ACLR compliance in multi-tone LTE signals. |
Use Scenario: Real-time frequency-domain analysis of broadband RF emissions from 10MHz to 380MHz with >100dB dynamic range. IC Role / Device Role / Timing Role: Core digitizer enabling fast Fourier transforms with low phase noise and high resolution. Use Value: 77.1dBFS noise floor and 128k-point FFT capability support sub-0.1dB amplitude accuracy across span. |
| Communications Test Equipment | High-Speed ATE Systems |
Use Scenario: Signal generation and analysis in vector signal analyzers verifying 5G NR waveform fidelity. IC Role / Device Role / Timing Role: Precision ADC in receiver path validating modulation accuracy and spectral regrowth. Use Value: ±1.5LSB INL and 2.25VP-P PGA range ensure <0.3% ENOB error at –1dBFS full-scale inputs. |
Use Scenario: Automated test of RF transceivers requiring rapid, repeatable digitization of stimulus responses. IC Role / Device Role / Timing Role: High-throughput ADC interfacing directly to FPGA-based pattern generators and comparators. Use Value: 7-cycle data latency and LVDS output timing skew ≤0.6ns enable deterministic real-time pass/fail decisions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9246BCPZ-125 | 14-bit, 125Msps; lower max sample rate; no PGA; fixed 2VPP input range | Better power efficiency (950mW), but lacks undersampling headroom above 250MHz due to 550MHz BW | Select when system clock is ≤125MHz and analog front end provides fixed gain; not suitable for 130Msps or 700MHz BW needs |
| LTC2207IUP-14 | 14-bit, 105Msps; same pinout/package; identical feature set except reduced speed grade | Lower power (1.1W) and cost; maintains same SFDR/noise specs at 105Msps | Drop-in replacement only if system design tolerates 105Msps maximum; retains all software and layout compatibility |
Compared with AD9246BCPZ-125 and LTC2207IUP-14, the LTC2208-14 uniquely delivers 130Msps sampling with 700MHz full-power bandwidth and integrated PGA-enabling direct RF sampling in compact 64-pin QFN without external gain stages or clock cleanup circuits.
Availability
LTC2208-14 is available at Aetrix Electronics and suitable for cellular infrastructure, spectrum monitoring, and high-speed automated test equipment requiring stable component supply, long-term obsolescence planning, and traceable sourcing.
Supply support for LTC2208-14 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 communications, industrial, automotive, and healthcare markets.
The LTC2208-14 belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding communications infrastructure where wide bandwidth, ultra-low jitter, and high SFDR are mandatory for modern wireless standards.
FAQ
What is the maximum analog input frequency supported by the LTC2208-14?
The LTC2208-14 supports a full-power bandwidth of 700MHz, meaning it can accurately digitize analog input signals up to 700MHz while maintaining specified dynamic performance (e.g., SFDR >81dB at 250MHz). This enables direct undersampling of IF and RF signals without downconversion in receiver architectures.
Does the LTC2208-14 require an external reference voltage?
No-the LTC2208-14 includes an internal 2.5V bandgap reference. The SENSE pin selects reference mode: tied to VDD enables the internal reference, while external 2.5V or 1.25V references may be applied for improved stability or system-level calibration. Both configurations yield a 2.25VP-P full-scale range with PGA = 0.
How does the PGA setting affect the LTC2208-14's input range and noise performance?
When PGA = low, the LTC2208-14 uses 1× gain and accepts a 2.25VP-P differential input range; when PGA = high, it applies 1.5× gain and accepts 1.5VP-P. Higher gain reduces effective input-referred noise but compresses headroom-SNR drops from 77.1dBFS to 74.9dBFS at 5MHz when PGA is enabled.
Can the LTC2208-14 operate with a 2.5V digital supply (OVDD)?
Yes-the LTC2208-14 supports OVDD from 0.5V to 3.6V in CMOS mode. At OVDD = 2.5V, VOH is guaranteed ≥2.49V and VOL ≤0.1V under load, ensuring compatibility with 2.5V FPGA I/O banks. LVDS mode requires OVDD = 3.0–3.6V per standard LVDS specifications.
What is the purpose of the RAND pin on the LTC2208-14?
The RAND pin enables digital output randomization: when high, bits D1–D13 are XORed with D0 (LSB), reducing deterministic spectral energy in the digital output bus. This minimizes radiated emissions and crosstalk into sensitive analog sections-critical in densely packed RF receiver PCB layouts using the LTC2208-14.
DC854D-C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Number of A/D Converters:
- 1
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 130M
- Data Interface:
- Parallel
- Input Range:
- 2.25Vpp
- Power (Typ) @ Conditions:
- 1.498W @ 130MSPS
- Utilized IC / Part:
- LTC2208-14
- Contents:
- Board(s)
DC854D-C FAQ
1.How can I place an order for DC854D-C through Aetrix?
Please submit a Request for Quotation (RFQ) for DC854D-C 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-C reliable?
The price and inventory of DC854D-C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC854D-C is usually 5 days.
3.What payment methods are accepted for DC854D-C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC854D-C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC854D-C?
DC854D-C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC854D-C 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-C?
For technical support, including DC854D-C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC854D-C requirements.
6.How does Aetrix verify that DC854D-C is sourced from the original manufacturer or authorized distributors?
All DC854D-C 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-C meets industry standards.
7.What is the process for return or replacement of DC854D-C?
All DC854D-C units undergo pre-shipment inspection (PSI). If there is an issue with DC854D-C, 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-C part is unused and in its original packaging.
Return procedure for DC854D-C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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