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Analog Devices Inc. LTC2205CUK-14#PBF
- Part No.:
- LTC2205CUK-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2205CUK-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,566
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Product details
Overview
LTC2205CUK-14#PBF from Analog Devices (acquired Linear Technology) is a 14-bit, 65Msps pipelined analog-to-digital converter optimized for high-frequency undersampling applications up to 700MHz full-power bandwidth. It features 78.3dB SNR at 5MHz input (2.25VP-P range), 98dB SFDR, and ultralow 90fsRMS aperture jitter - enabling high-fidelity digitization in cellular base station receivers and spectrum analyzers.
For engineers reviewing the LTC2205CUK-14#PBF datasheet, LTC2205CUK-14#PBF pinout, LTC2205CUK-14#PBF application, or LTC2205CUK-14#PBF equivalent, key selection criteria include its differential 14-bit CMOS output interface, programmable gain amplifier (PGA) supporting 1.5VP-P/2.25VP-P input ranges, optional internal dither, and clock duty cycle stabilizer for robust timing under non-ideal clock sources.
Technical Context
The LTC2205CUK-14#PBF implements a five-stage pipelined ADC architecture with integrated sample-and-hold, PGA front end, and correction logic. Its differential analog input (AIN+/AIN–) and encode inputs (ENC+/ENC–) provide >60dB common-mode rejection and support sine wave, LVDS, PECL, TTL, or CMOS clocking.
It delivers 7-cycle pipeline latency, supports offset binary or 2's complement output formats via MODE pin configuration, and includes dedicated control pins for shutdown (SHDN), dither enable (DITH), output randomization (RAND), and over/underflow indication (OF). The separate OVDD supply (0.5V–3.6V) enables flexible interfacing with downstream logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full code coverage across temperature. |
| Sample Rate | 65Msps - fixed maximum sampling frequency; supports real-time digitization of wideband IF signals. |
| SNR | 78.3dBFS at 5MHz input (2.25VP-P, PGA=0) - defines usable dynamic range for high-SNR signal capture. |
| SFDR | 98dBc at 5MHz input (2.25VP-P, PGA=0) - determines spurious-free resolution in multi-tone environments. |
| Aperture Jitter | 90fsRMS - enables clean undersampling of RF carriers up to 140MHz without significant noise degradation. |
| Full-Power Bandwidth | 700MHz - allows direct digitization of wideband analog inputs without external anti-alias filtering below this frequency. |
| Power Dissipation | 597mW typical at 65Msps - defines thermal management requirements for dense 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 performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±1.125V or ±0.75V differential signals depending on PGA setting; optimized for high CMRR and harmonic suppression. |
| ENC+, ENC– | Differential encode clock input | Sampling edge defined by ENC+ rising / ENC– falling; supports single-ended drive with bypass capacitor on ENC–. |
| D0–D13 | CMOS digital outputs | 14-bit parallel data bus (D13 = MSB); output swing configurable via OVDD (0.5V–3.6V). |
| CLKOUT+, CLKOUT– | Data valid strobe outputs | Complementary clock-aligned signals indicating valid data window; used for synchronous latching in FPGA/ASIC interfaces. |
| PGA | Programmable gain amplifier control | Logic-low selects 1× gain (2.25VP-P input range); logic-high selects 1.5× gain (1.5VP-P input range). |
| SHDN | Power shutdown control | Active-high input; places analog core in low-power state (<0.2mW) and forces digital outputs to high-impedance. |
| MODE | Output format & duty cycle stabilizer select | Four-state voltage level (0V, 1/3VDD, 2/3VDD, VDD) configures offset binary/2's complement and enables/disables clock stabilizer. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow aperture jitter (90fsRMS) | Enables high-fidelity undersampling of RF carriers up to 140MHz without SNR penalty from sampling uncertainty. |
| Configurable PGA front end | Switches between 2.25VP-P (low-gain, high-input-headroom) and 1.5VP-P (high-gain, improved small-signal resolution) input ranges. |
| Optional internal dither | Reduces harmonic distortion and improves SFDR by >10dB at low input levels when enabled via DITH pin. |
| Output randomization (RAND) | XOR-based scrambling of D1–D13 with D0 reduces deterministic EMI from repetitive digital output patterns. |
| Separate OVDD supply | Allows independent optimization of digital output voltage (0.5V–3.6V) to match downstream logic family (e.g., 1.8V FPGA I/O). |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
Use Scenario: Digitizing 70MHz–250MHz IF signals from RF downconverters in LTE/5G macrocell base stations. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth with minimal quantization noise and spurious content. Use Value: 98dB SFDR ensures accurate detection of weak adjacent-channel signals in crowded spectral environments. |
Use Scenario: Real-time acquisition of broadband RF spectra up to 140MHz input frequency in portable and benchtop analyzers. IC Role / Device Role / Timing Role: Primary digitizer providing high-resolution FFT-ready samples with low aperture jitter for precise frequency-domain analysis. Use Value: 700MHz full-power bandwidth eliminates need for external anti-alias filters below 140MHz, simplifying analog front-end design. |
| Communications ATE System | High-Speed Imaging Data Acquisition |
Use Scenario: Automated test equipment validating RF transceiver linearity and modulation accuracy across multiple standards (WCDMA, LTE, Wi-Fi). IC Role / Device Role / Timing Role: Precision ADC capturing modulated waveforms for EVM, ACLR, and ACPR measurements. Use Value: 78.3dB SNR enables measurement of low-level distortion products critical for transmitter compliance testing. |
Use Scenario: Digitizing fast-ramping analog outputs from scientific CCD/CMOS image sensors in medical or industrial inspection systems. IC Role / Device Role / Timing Role: High-throughput ADC synchronizing with pixel clock to capture transient light intensity events. Use Value: 65Msps sample rate supports >10Mpixel/s frame rates with 14-bit depth for high-fidelity image reconstruction. |
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, 88dB SFDR; requires external reference; no PGA or dither | Lacks integrated PGA and dither - less flexible for varying input signal levels and low-amplitude distortion testing | Select when reference and clock conditioning are already implemented externally and lower cost is prioritized over feature integration. |
| LTC2206IUH-14#PBF | 14-bit, 80Msps, 77.5dB SNR, 92dB SFDR; same pinout; higher power (850mW) | Higher sample rate but reduced SFDR at 140MHz - trade-off between speed and spurious performance | Select when system requires >65Msps sampling and can accommodate increased power dissipation and thermal design complexity. |
Compared with AD9246BCPZ-65 and LTC2206IUH-14#PBF, the LTC2205CUK-14#PBF provides superior SFDR (98dB vs. 88dB/92dB) and integrated signal conditioning (PGA, dither, randomizer), making it optimal for demanding communications receiver and spectral analysis applications where spurious-free dynamic range is critical.
Availability
LTC2205CUK-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, test instrumentation, and high-speed imaging systems requiring stable component supply, long-term manufacturability, and guaranteed lead-free compliance.
Supply support for LTC2205CUK-14#PBF 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 LTC2205CUK-14#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for wideband communications receivers, spectrum monitoring, and automated test equipment where ultra-low jitter and high SFDR are essential.
FAQ
What is the operating temperature range for the LTC2205CUK-14#PBF?
The LTC2205CUK-14#PBF is rated for commercial temperature operation from 0°C to +70°C. This is confirmed by the "C" grade designation in the part number and the ordering information table specifying "0°C to 70°C" for the LTC2205CUK-14#PBF variant. Industrial-grade alternatives (e.g., LTC2205IUK-14#PBF) extend to –40°C to +85°C.
Does the LTC2205CUK-14#PBF require an external reference voltage?
No, the LTC2205CUK-14#PBF includes an internal 2.5V bandgap reference. When SENSE (Pin 1) is tied to VDD, the device uses this internal reference to set the full-scale ADC range. An external 2.5V or 1.25V reference may be applied to SENSE for improved accuracy or system-level reference synchronization, but it is not required for basic operation.
How does the PGA pin affect the input range of the LTC2205CUK-14#PBF?
The PGA pin on the LTC2205CUK-14#PBF selects between two differential input voltage ranges: logic-low (PGA = 0) configures a 2.25VP-P range with 1× gain, while logic-high (PGA = 1) configures a 1.5VP-P range with 1.5× gain. Both settings maintain the same 14-bit resolution but optimize dynamic range for either high-headroom or high-sensitivity signal acquisition scenarios.
Can the LTC2205CUK-14#PBF operate with a single-ended clock input?
Yes, the LTC2205CUK-14#PBF supports single-ended clocking. While ENC+ and ENC– are designed for differential operation, the datasheet explicitly states that ENC– may be driven with a single-ended sine wave, PECL, LVDS, TTL, or CMOS signal - provided it is bypassed to ground with a 0.1μF capacitor. ENC+ remains the active edge-triggered input in this configuration.
What is the purpose of the RAND pin on the LTC2205CUK-14#PBF?
The RAND pin on the LTC2205CUK-14#PBF enables digital output randomization: when asserted high, it XORs bits D1–D13 with D0 (LSB), scrambling the output pattern to reduce deterministic electromagnetic interference (EMI) caused by repetitive data sequences. The original data can be recovered by reapplying the same XOR operation at the receiving end.
LTC2205CUK-14#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 65M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3.135V ~ 3.465V
- Voltage - Supply, Digital:
- 3.135V ~ 3.465V
- Features:
- PGA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2205CUK-14#PBF FAQ
1.How can I place an order for LTC2205CUK-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2205CUK-14#PBF 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 LTC2205CUK-14#PBF reliable?
The price and inventory of LTC2205CUK-14#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2205CUK-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2205CUK-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2205CUK-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2205CUK-14#PBF?
LTC2205CUK-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2205CUK-14#PBF 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 LTC2205CUK-14#PBF?
For technical support, including LTC2205CUK-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2205CUK-14#PBF requirements.
6.How does Aetrix verify that LTC2205CUK-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2205CUK-14#PBF 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 LTC2205CUK-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2205CUK-14#PBF?
All LTC2205CUK-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2205CUK-14#PBF, 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 LTC2205CUK-14#PBF part is unused and in its original packaging.
Return procedure for LTC2205CUK-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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