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Analog Devices Inc. LTC2208IUP#TRPBF
- Part No.:
- LTC2208IUP#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2208IUP#TRPBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,438
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Product details
Overview
LTC2208IUP#TRPBF from Analog Devices (acquired Linear Technology) is a 16-bit, 130Msps analog-to-digital converter optimized for high-frequency signal digitization up to 700MHz full-power bandwidth, featuring 78dBFS noise floor, 100dB spurious-free dynamic range (SFDR), and 70fsRMS aperture jitter. It integrates a programmable gain amplifier (PGA) front end supporting 1.5VP-P or 2.25VP-P input ranges and operates from a single 3.3V supply with 1.25W typical power dissipation. This ADC serves as the core digitizer in wideband communications receivers and spectrum analyzers.
For engineers reviewing the LTC2208IUP#TRPBF datasheet, LTC2208IUP#TRPBF pinout, LTC2208IUP#TRPBF application, or LTC2208IUP#TRPBF equivalent, key selection considerations include its LVDS/CMOS output flexibility, clock duty cycle stabilizer support, internal dither capability, PGA configurability, and guaranteed performance across –40°C to +85°C industrial temperature range.
Technical Context
The LTC2208IUP#TRPBF employs a 16-bit pipelined ADC architecture with integrated sample-and-hold (S/H) and correction logic, enabling undersampling of RF signals up to 700MHz while maintaining 78dBFS SNR at 5MHz and >83dB SFDR at 250MHz. Its dual-bus LVDS output supports standard or low-power modes with differential swing options (247–454mV or 125–250mV), and CMOS outputs offer full-rate or demultiplexed configurations with programmable OVDD (0.5V–3.6V).
Control is implemented via dedicated logic pins: LVDS pin selects output mode (Standard LVDS, Low Power LVDS, Demux CMOS, Full-Rate CMOS); MODE pin configures output format (offset binary/2's complement) and enables/disables the clock duty cycle stabilizer; PGA pin sets input range; DITH enables internal dither; RAND activates output randomization. The SENSE pin selects internal 2.5V reference or external 1.25V/2.5V reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Sample Rate | 16-bit, 130Msps - delivers 2.08 Gbps raw data throughput with quantization sufficient for high-fidelity IF/RF sampling in base stations and test equipment. |
| Noise Floor | 78dBFS - enables detection of weak signals buried 78dB below full-scale, critical for spectrum analysis and receiver sensitivity. |
| SFDR | 100dB (at 5MHz), >83dB (at 250MHz) - suppresses harmonics and spurs to preserve signal integrity in dense spectral environments. |
| Aperture Jitter | 70fsRMS - limits sampling uncertainty, allowing clean undersampling of 250MHz+ inputs without significant SNR degradation. |
| Input Bandwidth | 700MHz full-power - supports direct sampling of L-band and lower S-band RF signals without external downconversion. |
| Power Dissipation | 1.25W (CMOS mode) - manageable thermal load with appropriate PCB copper and exposed pad soldering in compact 9mm × 9mm QFN. |
| Supply | Single 3.3V analog rail (VDD), independent 0.5–3.6V digital output rail (OVDD) - simplifies power design and enables level-shifting to FPGA I/O banks. |
Pinout & Package
Package: 64-lead (9mm × 9mm) plastic QFN 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 | Sample edge defined by ENC+ rising / ENC– falling; supports sine, PECL, LVDS, TTL, CMOS; duty cycle stabilizer optional. |
| D0+ to D15+, D0– to D15– | LVDS data outputs (MSB D15) | Differential 100Ω-terminated outputs; Standard LVDS (247–454mV) or Low Power LVDS (125–250mV) per LVDS pin setting. |
| CLKOUT+, CLKOUT– | LVDS data valid strobe | Edge-aligned with data; rising CLKOUT+ / falling CLKOUT– latches sampled data at receiver; latency = 7 cycles. |
| LVDS (Pin 61) | Output mode select | 0V = Full-Rate CMOS; 1/3VDD = Demux CMOS; 2/3VDD = Low Power LVDS; VDD = Standard LVDS - configures entire output interface. |
| 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 dynamic range for signal amplitude. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Configurable 1× or 1.5× front-end gain allows matching of ADC input range to varying signal amplitudes without external amplification. |
| Internal Dither | Reduces harmonic distortion and improves SFDR by >10dB at –25dBFS input when enabled, especially beneficial for narrowband signal analysis. |
| Output Randomization (RAND) | XOR-based scrambling of D1–D15 with D0 reduces deterministic EMI from repetitive digital patterns on PCB traces and connectors. |
| Clock Duty Cycle Stabilizer | Enables high-performance sampling with non-50% clock duty cycles (e.g., from PLLs or dividers), eliminating need for external duty-cycle correction circuitry. |
| Flexible Reference Selection | SENSE pin selects internal 2.5V bandgap or external 1.25V/2.5V reference, supporting system-level calibration and mixed-signal synchronization. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
Use Scenario: Digitizing wideband IF signals (e.g., 70–300MHz) from quadrature downconverters in multi-carrier LTE/NR base station transceivers. IC Role / Device Role / Timing Role: Primary high-speed ADC capturing complex baseband I/Q data at 130Msps with <70fs jitter to preserve EVM and ACLR performance. Use Value: 100dB SFDR prevents intermodulation distortion from adjacent carriers; 700MHz bandwidth enables direct IF sampling, reducing component count and phase-matching complexity. | Use Scenario: Capturing real-time RF spectrum over 100MHz instantaneous bandwidth in portable and benchtop analyzers. IC Role / Device Role / Timing Role: Core digitizer feeding FFT engine; uses internal dither and randomization to minimize spectral leakage and spurious artifacts in displayed trace. Use Value: 78dBFS noise floor ensures visibility of low-level signals; LVDS outputs drive long traces to FPGA with minimal EMI impact on sensitive analog front end. |
| High-Speed ATE Channel | Imaging System Digitizer |
Use Scenario: Precision waveform capture in automated test equipment for RF IC validation, requiring repeatable DC accuracy and AC linearity. IC Role / Device Role / Timing Role: High-fidelity ADC in stimulus-response measurement path; leverages ±4LSB INL and ±1LSB DNL for accurate DC offset/gain calibration. Use Value: Single-supply 3.3V operation simplifies ATE card power design; shutdown pin (SHDN) enables power gating between test sequences to reduce thermal drift. | Use Scenario: Converting analog outputs from scientific CCD/CMOS image sensors or ultrasound beamformers operating at multi-MHz pixel rates. IC Role / Device Role / Timing Role: High-linearity digitizer preserving contrast and dynamic range in medical or industrial imaging pipelines. Use Value: PGA front end adapts to varying sensor output levels; CMOS output mode interfaces directly to image processor ASICs with configurable OVDD (1.8V/2.5V/3.3V). |
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; 77.5dBFS SNR; 90dB SFDR @ 70MHz; requires dual 1.8V/3.3V supplies; no integrated PGA. | Better power efficiency (750mW), but lower sample rate and no PGA limits dynamic range adaptation in variable-signal environments. | Select when lower power and fixed-gain architecture suffice, and 125Msps meets system bandwidth requirements. |
| LTC2268IUP-14 | 14-bit, 130Msps pin-compatible variant; 73.5dBFS SNR; 90dB SFDR @ 70MHz; same package and pinout; lower resolution but reduced power (950mW). | Lower resolution trades off dynamic range for cost and power savings in applications where 14-bit fidelity is adequate (e.g., mid-tier instrumentation). | Select for drop-in replacement where 14-bit resolution satisfies ENOB requirements and power budget is constrained. |
Compared with AD9268BCPZ-125 and LTC2268IUP-14, the LTC2208IUP#TRPBF uniquely combines 130Msps sampling, integrated PGA, and 100dB SFDR in a single 3.3V supply QFN-making it optimal for wideband, variable-amplitude RF digitization where board space, supply simplicity, and spur-free performance are critical.
Availability
LTC2208IUP#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, test & measurement equipment, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2208IUP#TRPBF 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 LTC2208IUP#TRPBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding wideband digitization in communications infrastructure, instrumentation, and defense electronics where ultra-low jitter, high SFDR, and flexible interface options are essential.
FAQ
What is the operating temperature range for the LTC2208IUP#TRPBF?
The LTC2208IUP#TRPBF is rated for industrial operation from –40°C to +85°C, as indicated by the "I" grade suffix in the part number. This specification is guaranteed per the Absolute Maximum Ratings table and applies to all dynamic and DC performance parameters unless otherwise noted in the datasheet conditions.
Does the LTC2208IUP#TRPBF support both LVDS and CMOS digital outputs?
Yes, the LTC2208IUP#TRPBF supports both LVDS and CMOS outputs. Output mode is selected via the LVDS pin (Pin 61): tying to VDD enables Standard LVDS, to 2/3VDD enables Low Power LVDS, to 1/3VDD enables Demultiplexed CMOS, and to GND enables Full-Rate CMOS. The device does not support simultaneous LVDS and CMOS output activation.
How does the PGA function affect the input voltage range of the LTC2208IUP#TRPBF?
The PGA pin (Pin 64) configures the LTC2208IUP#TRPBF's front-end gain: logic low selects 1× gain with 2.25VP-P differential input range; logic high selects 1.5× gain with 1.5VP-P differential input range. Both settings maintain the same full-scale ADC code span, allowing optimization for signal amplitude without changing reference or digital scaling.
What is the purpose of the SENSE pin on the LTC2208IUP#TRPBF?
The SENSE pin (Pin 1) on the LTC2208IUP#TRPBF selects the reference source: tied to VDD, it enables the internal 2.5V bandgap reference; tied to an external 1.25V or 2.5V source, it configures the ADC for that reference voltage. Both external options yield a 2.25VP-P full-scale input range when PGA = 0, supporting system-level reference synchronization.
Can the LTC2208IUP#TRPBF be used with non-50% duty cycle clock inputs?
Yes, the LTC2208IUP#TRPBF includes an optional clock duty cycle stabilizer activated via the MODE pin (Pin 62). When enabled, this circuit corrects duty cycle deviations in the ENC+/ENC– input, allowing high-performance sampling (e.g., 70fs jitter, 100dB SFDR) even with clocks exhibiting 30%–70% duty cycle - eliminating need for external duty-cycle correction.
LTC2208IUP#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2208IUP#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2208IUP#TRPBF 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#TRPBF reliable?
The price and inventory of LTC2208IUP#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2208IUP#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2208IUP#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2208IUP#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2208IUP#TRPBF?
LTC2208IUP#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2208IUP#TRPBF 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#TRPBF?
For technical support, including LTC2208IUP#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2208IUP#TRPBF requirements.
6.How does Aetrix verify that LTC2208IUP#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2208IUP#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2208IUP#TRPBF?
All LTC2208IUP#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2208IUP#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC2208IUP#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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