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Analog Devices Inc. DC919A-I
- Part No.:
- DC919A-I
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC919A-I.pdf
- Description:
- BOARD DEMO LTC2205CUK-14
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Product details
Overview
LTC2205-14 from Analog Devices (acquired Linear Technology) is a 14-bit, 65Msps pipelined analog-to-digital converter optimized for high-frequency signal digitization up to 700MHz full-power bandwidth. It features a programmable gain amplifier (PGA), ultralow 90fsRMS aperture jitter, 78.3dB SNR at 5MHz, and 98dB SFDR - enabling undersampling in communications receivers and spectrum analyzers.
For engineers reviewing the LTC2205-14 datasheet, LTC2205-14 pinout, LTC2205-14 application, or LTC2205-14 equivalent, key selection criteria include its differential 2.25VP-P input range, 48-pin QFN package with exposed thermal pad, clock duty cycle stabilizer option, and support for offset binary or 2's complement output formats.
Technical Context
The LTC2205-14 employs a five-stage CMOS pipelined ADC architecture with integrated sample-and-hold, correction logic, and shift register. Its front-end PGA provides selectable 1× or 1.5× gain, directly setting input ranges of 2.25VP-P or 1.5VP-P, while internal dither and output randomization reduce spectral artifacts.
Encode timing is controlled differentially via ENC+/ENC–, supporting sine wave, PECL, LVDS, TTL, or CMOS inputs. The device outputs 14-bit parallel CMOS data with configurable OVDD (0.5V–3.6V), includes CLKOUT± for data valid strobing, and features an out-of-range (OF) flag and shutdown (SHDN) control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full code coverage for precision measurement systems. |
| Sample Rate | 65Msps - supports real-time digitization of IF signals up to 140MHz without aliasing when undersampling. |
| SNR | 78.3dB at 5MHz input (2.25VP-P, PGA=0) - enables >12.7 effective bits for high-fidelity baseband capture. |
| SFDR | 98dBc at 5MHz (2nd/3rd harmonic), >90dBc at 140MHz - suppresses spurious tones critical in multi-carrier cellular base station receivers. |
| Aperture Jitter | 90fsRMS - limits sampling noise floor degradation, allowing clean digitization of 170MHz input signals. |
| INL / DNL | ±1.5LSB / ±1LSB max - ensures accurate amplitude linearity for calibration-sensitive ATE and imaging applications. |
| Power Dissipation | 597mW typical at 3.3V - balances performance and thermal management in dense RF front-end PCB layouts. |
Pinout & Package
48-pin (7mm × 7mm) plastic QFN package with exposed thermal pad (Pin 49 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±1.125V or ±0.75V differential signals; common-mode voltage set by VCM (1.25V) or external bias. |
| ENC+, ENC– | Differential encode clock input | Sampling edge defined by crossing point; supports single-ended drive with ENC– bypassed to GND. |
| D0–D13 | Parallel digital output bus | 14-bit MSB-first CMOS outputs; voltage swing set by OVDD (0.5V–3.6V) for interfacing with FPGA or ASIC logic. |
| CLKOUT+, CLKOUT– | Data valid strobe pair | Complementary outputs toggling at sample rate; used to latch D0–D13 on rising/falling edges for timing margin. |
| PGA, DITH, RAND, MODE, OE, SHDN | Configuration control inputs | Set gain (1×/1.5×), enable dither/randomization, select output format (offset binary/2's complement), and manage output state. |
| VCM, SENSE | Reference and bias control | VCM provides 1.25V common-mode reference; SENSE selects internal 2.5V bandgap or external 1.25V/2.5V reference. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Selects 1× (2.25VP-P) or 1.5× (1.5VP-P) input range - adapts dynamic range to signal level without external amplification. |
| Optional Internal Dither | Reduces harmonic distortion and improves SFDR by >10dB at low input levels - critical for detecting weak signals near noise floor. |
| Digital Output Randomizer | XOR-based scrambling of D1–D13 with D0 - lowers EMI emissions and minimizes deterministic coupling into adjacent traces or power planes. |
| Configurable Clock Duty Cycle Stabilizer | Enables high-performance operation with non-50% clock duty cycles - relaxes clock source requirements in system-level timing design. |
| Out-of-Range Indicator (OF) | Digital flag asserts on over/underflow - enables real-time saturation detection for automatic gain control (AGC) loop feedback. |
Applications
| Cellular Base Station Receivers | Spectrum Analyzers |
|---|---|
Use Scenario: Digitizing 70–250MHz IF signals from RF downconverters in LTE/5G macrocell base stations. IC Role / Device Role / Timing Role: High-speed ADC front-end capturing wide instantaneous bandwidth with minimal spurious content. Use Value: 98dB SFDR at 140MHz enables simultaneous reception of multiple carriers without intermodulation masking adjacent channels. |
Use Scenario: Real-time FFT-based frequency domain analysis of broadband RF signals up to 700MHz. IC Role / Device Role / Timing Role: Precision digitizer providing low-noise, high-linearity samples for 32k-point spectral processing. Use Value: 78.3dB SNR and 90fsRMS jitter preserve small-signal resolution across 10+ decade dynamic range measurements. |
| Communications Test Equipment (ATE) | Medical Ultrasound Imaging Systems |
Use Scenario: Automated functional testing of RF transceivers requiring calibrated stimulus and response capture. IC Role / Device Role / Timing Role: Reference-grade ADC validating modulation accuracy, EVM, and ACLR of DUTs. Use Value: ±1.5LSB INL and ±1LSB DNL ensure traceable amplitude fidelity for metrology-grade pass/fail thresholds. |
Use Scenario: Beamforming channel digitization in portable ultrasound probes operating at 5–15MHz carrier frequencies. IC Role / Device Role / Timing Role: Low-jitter, low-power ADC enabling high-frame-rate B-mode image reconstruction. Use Value: 65Msps sample rate with 700MHz bandwidth supports 12-bit-equivalent depth resolution at 15MHz center frequency. |
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-65 | 14-bit, 65Msps, 75dB SNR, 90dB SFDR, 3.3V supply, 48-pin LFCSP - lacks PGA and internal dither. | Lower dynamic range performance; requires external gain stage for sub-2VP-P signals. | Choose when cost sensitivity outweighs need for on-chip gain flexibility and ultra-low spurs. |
| LTC2206-14 | 14-bit, 80Msps, 77.5dB SNR, 95dB SFDR, same PGA/dither/RAND features - higher speed, slightly lower SFDR at 140MHz. | Supports wider instantaneous bandwidth but consumes ~15% more power (690mW). | Choose when system requires >65Msps sampling without redesigning clock distribution or data interface timing. |
Compared with AD9246BCPZ-65 and LTC2206-14, the LTC2205-14 delivers superior SFDR at 140MHz and integrated PGA functionality - making it optimal for receiver architectures where signal-level adaptability and spur suppression are prioritized over raw speed or lowest BOM cost.
Availability
LTC2205-14 is available at Aetrix Electronics and suitable for cellular infrastructure, test instrumentation, and medical imaging systems requiring stable component supply, long-term obsolescence planning, and guaranteed lot traceability.
Supply support for LTC2205-14 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 industrial, automotive, communications, and healthcare markets.
The LTC2205-14 belongs to ADI's high-speed precision ADC product line, designed specifically for demanding RF receiver and instrumentation applications requiring wide bandwidth, low jitter, and flexible input conditioning.
FAQ
What is the maximum analog input frequency supported by the LTC2205-14?
The LTC2205-14 has a 700MHz full-power bandwidth, meaning it maintains ≥–3dB amplitude response up to 700MHz for a full-scale input. This enables direct undersampling of RF signals in the UHF and low microwave bands without external filtering prior to the ADC input.
Does the LTC2205-14 require an external reference voltage?
No - the LTC2205-14 includes an internal 2.5V bandgap reference. Tying the SENSE pin to VDD activates this reference, setting a 2.25VP-P full-scale range. An external 1.25V or 2.5V reference may be used for improved stability or system-level reference sharing, but is not required for basic operation of the LTC2205-14.
How does the PGA function affect the LTC2205-14's input range and noise performance?
When PGA = low, the LTC2205-14 uses 1× gain with a 2.25VP-P input range; when PGA = high, it applies 1.5× gain and scales the range to 1.5VP-P. The latter reduces headroom but improves SNR for smaller signals by maximizing ADC utilization - verified at 76.0dB SNR (1.5V range) vs. 78.3dB (2.25V range) per the LTC2205-14 datasheet.
Can the LTC2205-14 operate with a 2.5V OVDD supply for interfacing with legacy 2.5V logic?
Yes - the LTC2205-14 supports OVDD from 0.5V to 3.6V. At OVDD = 2.5V, VOH is guaranteed ≥2.49V and VOL ≤0.1V under specified load conditions, ensuring reliable interfacing with 2.5V CMOS or LVCMOS logic families without level-shifting circuitry.
What is the pipeline latency of the LTC2205-14, and how does it impact system synchronization?
The LTC2205-14 has a fixed 7-cycle pipeline latency from ENC+ edge to valid D0–D13 output. This deterministic delay enables precise time-of-arrival alignment in multi-channel systems and simplifies timing closure in FPGA-based data capture engines - a key specification confirmed in the LTC2205-14 timing diagram and datasheet Table 6.
DC919A-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:
- 14
- Sampling Rate (Per Second):
- 65M
- Data Interface:
- Parallel
- Input Range:
- 1.5 ~ 2.25Vpp
- Power (Typ) @ Conditions:
- 597mW @ 65MSPS
- Utilized IC / Part:
- LTC2205-14
- Contents:
- Board(s)
DC919A-I FAQ
1.How can I place an order for DC919A-I through Aetrix?
Please submit a Request for Quotation (RFQ) for DC919A-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 DC919A-I reliable?
The price and inventory of DC919A-I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC919A-I is usually 5 days.
3.What payment methods are accepted for DC919A-I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC919A-I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC919A-I?
DC919A-I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC919A-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 DC919A-I?
For technical support, including DC919A-I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC919A-I requirements.
6.How does Aetrix verify that DC919A-I is sourced from the original manufacturer or authorized distributors?
All DC919A-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 DC919A-I meets industry standards.
7.What is the process for return or replacement of DC919A-I?
All DC919A-I units undergo pre-shipment inspection (PSI). If there is an issue with DC919A-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 DC919A-I part is unused and in its original packaging.
Return procedure for DC919A-I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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