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Analog Devices Inc. LTC2208CUP-14#PBF
- Part No.:
- LTC2208CUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2208CUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,755
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Product details
Overview
LTC2208CUP-14#PBF from Analog Devices (acquired Linear Technology) is a 14-bit, 130Msps pipeline 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 is deployed in cellular base station receivers requiring undersampling of RF signals with low noise floor (77.1dBFS) and high SFDR (98dB).
For engineers reviewing the LTC2208CUP-14#PBF datasheet, LTC2208CUP-14#PBF pinout, LTC2208CUP-14#PBF application, or LTC2208CUP-14#PBF equivalent, this page delivers verified package mapping (64-pin QFN), confirmed timing parameters (7-cycle latency, 1.3–4ns ENC-to-data delay), real-world AC performance at 250MHz input (SFDR >81dB), and validated alternative options for communications-grade ADC selection.
Technical Context
The LTC2208CUP-14#PBF employs a 14-bit pipelined ADC core with integrated sample-and-hold, internal reference generator, and correction logic. Its PGA front end supports two input ranges (2.25VP-P or 1.5VP-P), enabling optimization for varying signal amplitudes without external amplification.
Digital output architecture supports four modes: standard LVDS, low-power LVDS, full-rate CMOS, and demultiplexed CMOS - selectable via LVDS and MODE pins. Clock interface accepts differential (LVDS/PECL) or single-ended (TTL/CMOS) inputs, with an optional duty cycle stabilizer ensuring performance across 2.6–3.846ns high/low times.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sample Rate | 130Msps - enables Nyquist-compliant digitization of IF signals up to 65MHz or undersampling of RF bands up to 700MHz. |
| Resolution | 14-bit - provides 84dB theoretical SNR ceiling and sufficient quantization granularity for high-fidelity spectrum analysis. |
| Noise Floor | 77.1dBFS at 5MHz - ensures detection of weak signals in dense spectral environments like cellular base station receivers. |
| SFDR | 98dBc (2nd/3rd harmonic, 5MHz) - suppresses spurious content critical for adjacent-channel interference rejection in LTE/WCDMA. |
| Aperture Jitter | 70fsRMS - limits sampling uncertainty, preserving SNR at high input frequencies (e.g., 250MHz input retains 73.6dBFS SNR). |
| INL / DNL | ±1.5LSB / ±0.5LSB - guarantees monotonicity and accurate amplitude representation across full code range, essential for imaging systems. |
| Power Dissipation | 1.32W (CMOS mode) - balances performance and thermal load in densely packed RF front-end modules. |
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 integrity (θJA = 20°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts 1.5–2.25VP-P differential signal; common-mode voltage set by internal VCM (1.25V) or external bias. |
| ENC+, ENC– | Differential encode clock input | Sampling edge-triggered on ENC+ rising/ENC– falling; supports PECL/LVDS/TTL/CMOS with internal 6.2kΩ bias. |
| 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 levels per LVDS pin setting. |
| LVDS (Pin 61) | Output mode select | GND = full-rate CMOS; 1/3VDD = demux CMOS; 2/3VDD = low-power LVDS; VDD = standard LVDS. |
| PGA (Pin 64) | Front-end gain control | Low = 1× gain, 2.25VP-P input range; High = 1.5× gain, 1.5VP-P input range - enables dynamic range adaptation. |
| SHDN (Pin 19) | Power-down control | Active-high; places analog core in shutdown (0.2mW) and outputs in high-impedance state for power gating. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Configurable 1× or 1.5× gain adjusts input full-scale range between 2.25VP-P and 1.5VP-P to match signal chain headroom. |
| Optional Internal Dither | Reduces harmonic distortion and improves SFDR by >10dB at –25dBFS input when enabled, critical for low-level signal fidelity. |
| Digital Output Randomizer (RAND) | XOR-based scrambling of D1–D13 with D0 reduces deterministic EMI from repetitive digital patterns in high-speed layout. |
| Flexible Clock Interface | Duty cycle stabilizer compensates for non-50% clock sources, maintaining timing margins across 30–70% duty cycles. |
| Multi-Format Digital Outputs | Single supply (3.3V) supports LVDS (standard/low-power) or CMOS (full-rate/demux) - simplifies interface to FPGAs or ASICs. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
|
Use Scenario: Digitizing 70–250MHz IF signals from multi-carrier WCDMA/LTE downconverters under high adjacent-channel interference. IC Role / Device Role / Timing Role: High-SNR, high-SFDR ADC capturing wide instantaneous bandwidth with minimal spurious content. Use Value: 98dB SFDR and 77.1dBFS noise floor enable detection of –100dBm signals in presence of +10dBm blockers. |
Use Scenario: Real-time FFT-based frequency domain analysis requiring low phase noise and high linearity over 100MHz span. IC Role / Device Role / Timing Role: Precision digitizer feeding FPGA-based spectral processing with deterministic 7-cycle latency. Use Value: 70fsRMS jitter preserves frequency resolution; ±1.5LSB INL ensures accurate amplitude calibration across sweep. |
| Communications ATE System | Medical Ultrasound Beamformer |
|
Use Scenario: Automated test equipment validating RF transceivers using swept-tone and modulated signal analysis. IC Role / Device Role / Timing Role: Reference-grade ADC providing traceable measurement accuracy for production test repeatability. Use Value: Guaranteed ±0.5LSB DNL and no missing codes ensure pass/fail decisions reflect true device performance, not ADC artifacts. |
Use Scenario: Digitizing 10–20MHz echo return signals from phased-array transducers with time-of-flight precision. IC Role / Device Role / Timing Role: Low-latency, low-jitter ADC synchronizing with ultrasound transmit pulses for sub-micron depth resolution. Use Value: 7-cycle fixed latency and 1.3ns ENC-to-data delay enable precise time-aligned channel combining in digital beamforming. |
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; 75.5dBFS SNR; requires separate REF buffer; no integrated PGA. | Better suited for cost-sensitive, lower-bandwidth instrumentation where 130Msps is unnecessary. | Select when system clock is ≤125MHz and external gain staging is already present. |
| LTC2207IUP-14#PBF | 14-bit, 105Msps; same pinout/package; identical feature set (PGA, dither, RAND); wider temp range (–40°C to 85°C). | Drop-in replacement for industrial environments requiring extended temperature operation. | Choose for designs needing guaranteed performance beyond 70°C ambient without layout change. |
Compared with AD9246BCPZ-125, the LTC2208CUP-14#PBF delivers 5Msps higher throughput and integrated PGA for direct RF sampling; compared with LTC2207IUP-14#PBF, it trades 25Msps speed for commercial-grade cost and thermal margin - making it optimal for base station IF sections where 130Msps is required but extended temperature is not.
Availability
LTC2208CUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, spectrum monitoring, and automated test equipment requiring stable component supply, long-term obsolescence management, and traceable lot-level documentation.
Supply support for LTC2208CUP-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 data conversion and signal processing, formed through the acquisition of Linear Technology in 2017.
The LTC2208 product line was designed for high-performance communications receivers demanding ultra-low jitter, wide input bandwidth, and flexible digital interfacing - targeting 3G/4G/5G infrastructure and defense EW systems.
FAQ
What is the maximum analog input frequency supported by the LTC2208CUP-14#PBF?
The LTC2208CUP-14#PBF supports a full-power analog input bandwidth of 700MHz, enabling undersampling of RF signals well into the UHF band. This specification is measured with RS ≤ 25Ω source impedance and applies across the commercial temperature range (0°C to 70°C) for the LTC2208CUP-14#PBF variant.
Does the LTC2208CUP-14#PBF require an external reference voltage?
No - the LTC2208CUP-14#PBF includes an internal 2.5V bandgap reference. The SENSE pin can be tied to VDD to activate it, yielding a 2.25VP-P full-scale input range (PGA = 0). An external 2.5V or 1.25V reference may also be used, but is not required for standard operation of the LTC2208CUP-14#PBF.
How does the PGA function affect the input range of the LTC2208CUP-14#PBF?
The PGA pin on the LTC2208CUP-14#PBF selects between two differential input voltage ranges: logic low yields 2.25VP-P (1× gain), and logic high yields 1.5VP-P (1.5× gain). This allows matching of the ADC's full-scale range to varying signal amplitudes without external amplifiers, preserving SNR while avoiding clipping in the LTC2208CUP-14#PBF.
What digital output formats does the LTC2208CUP-14#PBF support?
The LTC2208CUP-14#PBF supports four digital output configurations: standard LVDS, low-power LVDS, full-rate CMOS, and demultiplexed CMOS - selected via the LVDS and MODE pins. CMOS outputs support OVDD from 0.5V to 3.6V, enabling direct interfacing with 1.8V, 2.5V, or 3.3V logic families in the LTC2208CUP-14#PBF design.
Is the LTC2208CUP-14#PBF pin-compatible with any higher-resolution variants?
Yes - the LTC2208CUP-14#PBF is pin-compatible with the 16-bit LTC2208 (130Msps), sharing the same 64-pin QFN package and pinout. This allows migration to higher resolution without PCB redesign, provided system timing and power delivery accommodate the increased current draw of the 16-bit version.
LTC2208CUP-14#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 130M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel, 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:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2208CUP-14#PBF FAQ
1.How can I place an order for LTC2208CUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2208CUP-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 LTC2208CUP-14#PBF reliable?
The price and inventory of LTC2208CUP-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 LTC2208CUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2208CUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2208CUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2208CUP-14#PBF?
LTC2208CUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2208CUP-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 LTC2208CUP-14#PBF?
For technical support, including LTC2208CUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2208CUP-14#PBF requirements.
6.How does Aetrix verify that LTC2208CUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2208CUP-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 LTC2208CUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2208CUP-14#PBF?
All LTC2208CUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2208CUP-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 LTC2208CUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2208CUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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