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Analog Devices Inc. DC996B-D
- Part No.:
- DC996B-D
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC996B-D.pdf
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- 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 pipelined 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 supporting 1.5VP-P or 2.25VP-P input ranges, ultralow 70fsRMS aperture jitter, and ±1.5LSB INL. It serves as the core ADC in cellular base station receivers and spectrum analyzers requiring high SFDR at RF input frequencies.
For engineers reviewing the LTC2208-14 datasheet, LTC2208-14 pinout, LTC2208-14 application, or LTC2208-14 equivalent, this page delivers verified specifications including LVDS/CMOS output configuration, clock duty cycle stabilization, internal dither enable, PGA control, and 64-pin QFN package layout - all critical for RF receiver design, undersampling architectures, and high-speed data acquisition system integration.
Technical Context
The LTC2208-14 employs a 14-bit pipelined ADC core with integrated sample-and-hold (S/H) and correction logic, supported by a 700MHz full-power bandwidth track-and-hold amplifier. Its architecture enables undersampling of IF/RF signals up to 250MHz while maintaining >81dB SFDR (at 250MHz, 1.5VP-P input).
It supports dual-output modes: differential LVDS (standard or low-power) and single-ended CMOS (full-rate or demultiplexed), with separate OVDD supply enabling 0.5V–3.6V CMOS swing. Clock interface accepts differential (LVDS/PECL) or single-ended (TTL/CMOS) inputs, and includes an optional duty cycle stabilizer for robust timing at 130Msps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - defines quantization granularity and dynamic range ceiling of 84dB theoretical SNR. |
| Sample Rate | 130Msps - supports real-time digitization of wideband signals up to Nyquist frequency of 65MHz, or undersampling of higher IFs. |
| Noise Floor | 77.1dBFS at 5MHz - determines minimum detectable signal level in noise-limited applications like spectrum analysis. |
| SFDR | 98dBc at 5MHz (2nd/3rd harmonic); >81dBc at 250MHz - critical for rejecting spurious tones in multi-carrier cellular receivers. |
| Aperture Jitter | 70fsRMS - limits SNR degradation at high input frequencies; enables clean undersampling up to 250MHz. |
| INL / DNL | ±1.5LSB / ±0.5LSB - ensures monotonicity and accurate amplitude fidelity for measurement and imaging systems. |
| Input Bandwidth | 700MHz full-power - allows direct sampling of L-band and S-band IF signals without external amplification or filtering. |
| Power Dissipation | 1.32W (CMOS mode, 3.3V) - requires thermal management in dense RF subsystem layouts; exposed pad must be soldered to PCB ground. |
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 differential signal; common-mode voltage set by internal VCM (1.25V) or external bias. |
| ENC+, ENC– | Differential encode clock input | Sampling edge defined by ENC+ rising / ENC– falling; supports PECL/LVDS/TTL/CMOS; duty cycle stabilizer optional. |
| DA0–DA13, DB0–DB13 | Parallel digital outputs | DA bus active in full-rate CMOS; DB bus active in demux mode; both support LVDS or CMOS signaling per LVDS pin selection. |
| LVDS (Pin 61) | Output mode select | 0V = full-rate CMOS; 1/3VDD = demux CMOS; 2/3VDD = low-power LVDS; VDD = standard LVDS - configures I/O standard and power. |
| PGA (Pin 64) | Front-end gain control | Low = 1× gain, 2.25VP-P input range; High = 1.5× gain, 1.5VP-P input range - trades input headroom for SNR at lower signal levels. |
| SHDN (Pin 19) | Power shutdown control | Active-high; places analog circuitry in low-power state and forces digital outputs to high-impedance - enables rapid power cycling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Configurable 1× or 1.5× gain front end enables optimization between input dynamic range and SNR for varying signal amplitudes. |
| Internal Dither Enable (DITH) | Reduces harmonic distortion and improves SFDR by >10dB at –25dBFS input when enabled - critical for low-level signal detection. |
| Digital Output Randomizer (RAND) | XOR-based scrambling of D1–D13 with D0 reduces deterministic digital switching noise coupling into analog sections. |
| Clock Duty Cycle Stabilizer | Allows high-performance operation with clock duty cycles from 40% to 60%, relaxing requirements on clock generation circuitry. |
| Flexible Reference Options | Internal 2.5V bandgap or external 1.25V/2.5V reference selectable via SENSE pin - supports precision calibration and system-level reference sharing. |
| VCM Output (Pin 3) | Stable 1.25V common-mode bias source with <40ppm/°C tempco - eliminates need for external bias network at analog inputs. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
|
Use Scenario: Digitizing multi-carrier WCDMA/LTE IF signals at 185MHz with 20MHz instantaneous bandwidth. IC Role / Device Role / Timing Role: Primary ADC capturing wideband RF samples; uses undersampling and LVDS output to FPGA processing pipeline. Use Value: 98dB SFDR prevents intermodulation masking of adjacent channels; 70fsRMS jitter maintains EVM <1.5% at 20MHz bandwidth. |
Use Scenario: Real-time FFT-based spectral monitoring from 10kHz to 3GHz using superheterodyne downconversion to 140MHz IF. IC Role / Device Role / Timing Role: High-fidelity digitizer for 128k-point FFT engine; leverages PGA and dither to resolve low-level spurs near noise floor. Use Value: 77.1dBFS noise floor and >105dB SFDR (with dither) enable detection of –110dBm signals 60dB below carrier in 1Hz RBW. |
| ATE Digital Test Instrument | Medical Ultrasound Beamformer |
|
Use Scenario: High-speed parametric testing of RF components using swept-tone excitation and coherent capture. IC Role / Device Role / Timing Role: Precision acquisition channel synchronized to stimulus generator; uses CMOS demux mode for FPGA interface simplification. Use Value: ±1.5LSB INL ensures <0.02% gain error across full scale; 130Msps rate supports 65MHz analysis bandwidth per channel. |
Use Scenario: Digitizing 15MHz–20MHz echo return signals from phased-array transducers with time-gain compensation. IC Role / Device Role / Timing Role: Channel ADC in multi-channel receive beamformer ASIC; operates with PGA = 1 for optimal SNR at low-amplitude echoes. Use Value: 700MHz input bandwidth accommodates harmonics without aliasing; 74.9dBFS SNR at 30MHz enables >140dB dynamic range per channel. |
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; no integrated PGA; 650MHz input BW; 72dBFS SNR; LVDS-only outputs. | Lacks PGA and dither; lower SFDR (92dBc @ 5MHz); requires external gain stage for low-level signals. | Select when fixed-gain architecture suffices and 5Msps lower sample rate is acceptable; lower power (950mW). |
| LTC2207IUP-14 | 14-bit, 105Msps; same PGA, dither, and pinout; 600MHz input BW; 76.5dBFS SNR; identical QFN-64 package. | Slower sample rate limits IF bandwidth; slightly lower SFDR (96dBc @ 5MHz); otherwise functionally compatible. | Drop-in replacement for cost-sensitive or thermally constrained designs where 105Msps meets system requirements. |
Compared with AD9246BCPZ-125 and LTC2207IUP-14, the LTC2208-14 uniquely combines 130Msps speed, integrated PGA, and >98dB SFDR - making it optimal for next-generation wireless infrastructure where signal fidelity at high IFs is non-negotiable.
Availability
LTC2208-14 is available at Aetrix Electronics and suitable for cellular base station development, spectrum analyzer production, and high-speed ATE requiring stable component supply across extended temperature ranges (–40°C to 85°C).
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, designed specifically for demanding RF and IF digitization in wireless infrastructure, test equipment, and medical imaging systems.
FAQ
What is the maximum input frequency supported by the LTC2208-14?
The LTC2208-14 supports a full-power analog input bandwidth of 700MHz, enabling direct sampling or undersampling of IF signals up to 250MHz while maintaining >81dB SFDR. This makes the LTC2208-14 suitable for L-band and S-band receiver applications without requiring external anti-alias filtering beyond basic RF front-end conditioning.
Does the LTC2208-14 support both LVDS and CMOS digital outputs?
Yes, the LTC2208-14 supports both LVDS and CMOS outputs via the LVDS pin (Pin 61). Setting LVDS = VDD selects standard LVDS mode; LVDS = 2/3VDD selects low-power LVDS; LVDS = 0V or 1/3VDD configures full-rate or demultiplexed CMOS outputs, respectively. CMOS swing is adjustable from 0.5V to 3.6V using OVDD.
How does the PGA feature affect the input range and performance of the LTC2208-14?
The PGA (Pin 64) selects between two input ranges: low = 2.25VP-P (1× gain), high = 1.5VP-P (1.5× gain). At PGA = high, SNR improves ~2dB for low-level signals but full-scale headroom decreases - allowing better utilization of ADC dynamic range when input signals are attenuated prior to digitization. The LTC2208-14 maintains ±1.5LSB INL in both modes.
What is the purpose of the RAND pin on the LTC2208-14?
The RAND pin (Pin 63) enables digital output randomization: when high, bits D1–D13 are XORed with D0 (LSB), reducing deterministic spectral content in the digital output bus. This minimizes radiated emissions and crosstalk into sensitive analog sections. The LTC2208-14 output can be decoded by reapplying the same XOR operation in the receiving logic.
Can the LTC2208-14 operate with a single 3.3V supply?
Yes, the LTC2208-14 operates from a single 3.3V analog supply (VDD = 3.135V to 3.465V) and supports independent output supply (OVDD = 0.5V to 3.6V). All digital I/Os (ENC+, ENC–, DITH, SHDN, etc.) are 3.3V-compatible, and internal reference generation eliminates need for external voltage references unless higher accuracy is required.
DC996B-D 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)
DC996B-D FAQ
1.How can I place an order for DC996B-D through Aetrix?
Please submit a Request for Quotation (RFQ) for DC996B-D 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 DC996B-D reliable?
The price and inventory of DC996B-D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC996B-D is usually 5 days.
3.What payment methods are accepted for DC996B-D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC996B-D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC996B-D?
DC996B-D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC996B-D 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 DC996B-D?
For technical support, including DC996B-D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC996B-D requirements.
6.How does Aetrix verify that DC996B-D is sourced from the original manufacturer or authorized distributors?
All DC996B-D 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 DC996B-D meets industry standards.
7.What is the process for return or replacement of DC996B-D?
All DC996B-D units undergo pre-shipment inspection (PSI). If there is an issue with DC996B-D, 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 DC996B-D part is unused and in its original packaging.
Return procedure for DC996B-D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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