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Analog Devices Inc. LTC2208IUP#PBF
- Part No.:
- LTC2208IUP#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2208IUP#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,309
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Product details
Overview
LTC2208IUP#PBF from Analog Devices (formerly Linear Technology) is a 16-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, 70fs RMS aperture jitter, 78dBFS noise floor, and ±4LSB INL - deployed in cellular base station receivers and spectrum analyzers requiring undersampling of RF signals with low distortion.
For engineers reviewing the LTC2208IUP#PBF datasheet, LTC2208IUP#PBF pinout, LTC2208IUP#PBF application, or LTC2208IUP#PBF equivalent, key selection criteria include its dual LVDS/CMOS output flexibility, internal clock duty cycle stabilizer, PGA-selectable 1.5VP-P or 2.25VP-P input range, and guaranteed performance over –40°C to +85°C industrial temperature range.
Technical Context
The LTC2208IUP#PBF implements a 16-bit pipelined ADC core with integrated sample-and-hold, internal 2.5V bandgap reference (selectable via SENSE pin), and configurable output interface modes - including standard/low-power LVDS or single-ended/demultiplexed CMOS. Its PGA front end enables dynamic input range optimization without external amplification.
It supports differential or single-ended clock inputs (ENC+/ENC–) across PECL, LVDS, TTL, or CMOS logic families, and includes optional internal dither and data output randomization to suppress harmonic spurs and digital coupling effects in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Sample Rate | 16-bit, 130Msps - delivers 2.08 GSPS raw data throughput in full-rate CMOS mode; sufficient for Nyquist-sampled IF signals up to 65MHz or undersampled RF bands beyond 250MHz. |
| Noise Floor & SFDR | 78dBFS noise floor and 100dB spurious-free dynamic range (SFDR) at 5MHz - enables detection of weak signals adjacent to strong interferers in communications receivers. |
| Aperture Jitter | 70fs RMS - limits SNR degradation to ≤0.3dB at 250MHz input, critical for high-IF sampling and direct RF digitization. |
| Input Bandwidth | 700MHz full-power bandwidth - supports wideband applications like broadband spectrum analysis and imaging systems without external anti-alias filtering below 350MHz. |
| Power Dissipation | 1.25W typical (CMOS mode) - managed via dedicated OVDD supply (0.5V–3.6V) and shutdown pin (SHDN), enabling thermal-aware system partitioning. |
| INL / DNL | ±4LSB integral nonlinearity and ±1LSB differential nonlinearity - ensures monotonicity and accurate amplitude fidelity in precision measurement and ATE applications. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and outdoor wireless infrastructure deployments where ambient thermal cycling impacts ADC offset and gain stability. |
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.
| 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 VCM (1.25V) or external bias. |
| ENC+, ENC– | Differential encode clock input | Sample edge triggered on ENC+ rising / ENC– falling; supports 2VP-P sine, PECL, LVDS, TTL, or CMOS drive with optional duty cycle stabilizer. |
| LVDS (Pin 61) | Output mode select | Logic level selects Standard LVDS (VDD), Low-Power LVDS (2/3VDD), Demux CMOS (1/3VDD), or Full-Rate CMOS (GND). |
| PGA (Pin 64) | Front-end gain control | Low = 1× gain, 2.25VP-P input range; High = 1.5× gain, 1.5VP-P input range - optimizes SNR for varying signal amplitudes. |
| DA0–DA15 / DB0–DB15 | Parallel digital outputs | A bus active in all modes; B bus active only in demultiplexed CMOS - reduces output switching noise vs full-rate parallel bus. |
| SHDN (Pin 19) | Power-down control | High = analog section powered down, digital outputs tri-stated - enables rapid power gating in burst-mode receivers. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Selects between 2.25VP-P (PGA = low) and 1.5VP-P (PGA = high) input ranges to maximize SNR for varying signal levels without external gain stages. |
| Internal Clock Duty Cycle Stabilizer | Enables high-performance operation with clock duty cycles from 40% to 60%, relaxing requirements on clock generation circuitry in FPGA-based systems. |
| Configurable Output Interface | Single-pin LVDS mode selection supports Standard LVDS (350mV swing), Low-Power LVDS (175mV), or two CMOS formats - simplifies board-level interface reuse. |
| Optional Internal Dither | Reduces harmonic distortion and improves SFDR by >10dB at –25dBFS input when enabled, especially beneficial for narrowband signal analysis. |
| Digital Output Randomizer (RAND) | XOR-based scrambling of D1–D15 with D0 lowers deterministic EMI peaks and eases EMC compliance in high-density digital systems. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
Use Scenario: Digitizing 70MHz–380MHz IF or direct-sampled RF signals in LTE/5G macrocell transceivers with multi-carrier aggregation. IC Role / Device Role / Timing Role: Primary high-speed ADC capturing wide instantaneous bandwidth for digital predistortion (DPD) and channel estimation. Use Value: 100dB SFDR at 250MHz and 70fs jitter preserve adjacent-channel leakage ratio (ACLR) and error vector magnitude (EVM) under high input power. |
Use Scenario: Real-time frequency-domain analysis of broadband signals up to 500MHz using FFT-based processing in portable or benchtop analyzers. IC Role / Device Role / Timing Role: High-fidelity digitizer feeding FPGA-based FFT engines with minimal quantization noise and harmonic distortion. Use Value: 78dBFS noise floor and 700MHz bandwidth enable resolution of low-level spectral components within wide capture windows without analog preselection. |
| ATE Test Instrumentation | Medical Imaging Data Acquisition |
Use Scenario: High-accuracy parametric testing of RF components (filters, amplifiers) requiring precise stimulus-response characterization at IF frequencies. IC Role / Device Role / Timing Role: Reference-grade ADC in automated test equipment capturing transient responses and distortion profiles with traceable linearity. Use Value: ±4LSB INL and ±1LSB DNL ensure measurement repeatability and calibration stability across temperature and time. |
Use Scenario: Digitizing ultrasound echo signals (2–20MHz) or MRI gradient waveforms with high dynamic range and low latency in portable diagnostic systems. IC Role / Device Role / Timing Role: Signal-chain ADC interfacing directly with analog beamforming or receive-path filters. Use Value: PGA front end adapts to variable transducer sensitivities; LVDS outputs reduce noise coupling into sensitive analog front ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9268BCPZ-125 | 16-bit, 125Msps; lower sample rate but superior DC specs (±1.5LSB INL); requires external reference and separate analog/digital supplies. | Better suited for precision instrumentation than wideband RF; lacks PGA and internal dither. | Select when absolute linearity and low-frequency accuracy outweigh RF bandwidth needs. |
| LTC2207IUP#PBF | 16-bit, 105Msps; identical pinout, architecture, and feature set except reduced sample rate and lower power (1.05W). | Drop-in replacement where 130Msps is not required; same thermal and layout footprint. | Choose for cost-optimized or thermally constrained designs where 105Msps meets system bandwidth targets. |
Compared with AD9268BCPZ-125, the LTC2208IUP#PBF offers higher sample rate and integrated features (PGA, dither, duty cycle stabilizer) at the expense of slightly relaxed DC linearity; versus LTC2207IUP#PBF, it delivers 24% higher throughput with identical integration and thermal profile.
Availability
LTC2208IUP#PBF is available at Aetrix Electronics and suitable for cellular base station receiver design, spectrum analyzer front-end development, and ATE instrumentation requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LTC2208IUP#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 acquired Linear Technology in 2017 and maintains its high-performance signal chain portfolio, emphasizing precision, speed, and reliability for demanding analog applications.
The LTC2208IUP#PBF belongs to Linear's ultra-low-jitter, wide-bandwidth ADC family designed specifically for communications infrastructure, defense EW systems, and high-fidelity test equipment requiring RF-sampling capability without external IF translation.
FAQ
What is the operating temperature range of the LTC2208IUP#PBF?
The LTC2208IUP#PBF is rated for industrial operation from –40°C to +85°C. This range is validated per the "LTC2208I" grade in the official datasheet and ensures stable performance of parameters including INL, SFDR, and clock jitter across thermal extremes encountered in outdoor wireless infrastructure and industrial test gear.
Does the LTC2208IUP#PBF support both LVDS and CMOS digital outputs?
Yes, the LTC2208IUP#PBF supports both LVDS and CMOS outputs via the LVDS pin (Pin 61). Driving this pin to VDD selects Standard LVDS mode; to 2/3VDD selects Low-Power LVDS; to 1/3VDD enables demultiplexed CMOS; and grounding it selects full-rate CMOS - providing flexible interface matching without redesigning the digital interface layer.
How does the PGA function affect input range and system SNR in the LTC2208IUP#PBF?
The PGA pin (Pin 64) selects between 2.25VP-P (PGA = low) and 1.5VP-P (PGA = high) input ranges. At lower input amplitudes, enabling PGA gain improves effective SNR by ~3dB - confirmed in datasheet plots showing 75.3dBFS SNR at 1.5V range vs. 77.7dBFS at 2.25V range for 5MHz input - allowing optimal trade-off between headroom and sensitivity.
Can the LTC2208IUP#PBF be used with single-ended clock inputs?
Yes, the LTC2208IUP#PBF accepts single-ended clock inputs on ENC+ while biasing ENC– to 1.6V via its internal resistor network. A 0.1μF capacitor from ENC– to ground is recommended for noise rejection. The clock duty cycle stabilizer remains functional, supporting robust timing even with asymmetric input waveforms.
What is the purpose of the SENSE pin on the LTC2208IUP#PBF?
The SENSE pin (Pin 1) configures the reference source: tied to VDD, it selects the internal 2.5V bandgap reference; connected to an external 2.5V or 1.25V reference, it sets the same 2.25VP-P full-scale range (with PGA = 0). This allows calibration traceability to external standards or improved temperature drift performance using a precision external reference.
LTC2208IUP#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:
- 16
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2208IUP#PBF FAQ
1.How can I place an order for LTC2208IUP#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2208IUP#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 LTC2208IUP#PBF reliable?
The price and inventory of LTC2208IUP#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2208IUP#PBF is usually 5 days.
3.What payment methods are accepted for LTC2208IUP#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2208IUP#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2208IUP#PBF?
LTC2208IUP#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2208IUP#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 LTC2208IUP#PBF?
For technical support, including LTC2208IUP#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2208IUP#PBF requirements.
6.How does Aetrix verify that LTC2208IUP#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2208IUP#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 LTC2208IUP#PBF meets industry standards.
7.What is the process for return or replacement of LTC2208IUP#PBF?
All LTC2208IUP#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2208IUP#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 LTC2208IUP#PBF part is unused and in its original packaging.
Return procedure for LTC2208IUP#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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