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Analog Devices Inc. LTC2155IUP-14#TRPBF
- Part No.:
- LTC2155IUP-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2155IUP-14#TRPBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,188
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Product details
Overview
LTC2155IUP-14#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, 14-bit, 170Msps analog-to-digital converter optimized for undersampling wideband RF signals in communications infrastructure. It delivers 70dB SNR and 90dB SFDR at 15MHz input, operates from a single 1.8V supply, features DDR LVDS outputs, and supports 1.25GHz full-power bandwidth with 6-cycle pipeline latency.
For engineers reviewing the LTC2155IUP-14#TRPBF datasheet, LTC2155IUP-14#TRPBF pinout, LTC2155IUP-14#TRPBF application, or LTC2155IUP-14#TRPBF equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and timing behavior across –40°C to +85°C, and real-world substitution guidance for high-speed data acquisition systems.
Technical Context
The LTC2155IUP-14#TRPBF implements a pipelined ADC architecture with integrated sample-and-hold (S/H) front-end and correction logic. Its 1.25GHz analog input bandwidth enables direct RF sampling of cellular and SDR bands without external IF stages. The on-chip clock duty cycle stabilizer maintains performance across variable input clock duty cycles.
Dual-channel simultaneous sampling is achieved via matched internal clock distribution and independent analog paths. DDR LVDS output drivers support programmable 1.75mA or 3.5mA current per pair, with optional 100Ω on-chip termination and configurable CLKOUT phase delay relative to data edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in demanding measurement applications. |
| Sampling Rate | 170Msps maximum - defines real-time bandwidth capture capability for LTE, WiMAX, and radar IF digitization. |
| SNR @ 15MHz | 70dBFS typical - enables high-fidelity signal reconstruction with <0.3% RMS noise contribution at baseband. |
| SFDR @ 15MHz | 90dBFS typical - suppresses harmonics and spurs sufficiently for multi-carrier cellular basestation receiver compliance. |
| Full-Power BW | 1250MHz - allows undersampling of L-band and S-band RF signals without external filtering degradation. |
| Power Dissipation | 567mW total at 170Msps (1.75mA LVDS mode) - reduces thermal load in dense FPGA-ADC interface designs. |
| INL / DNL | ±0.85LSB / ±0.25LSB typical - ensures accurate amplitude linearity for medical imaging and test equipment calibration. |
Pinout & Package
64-lead (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity. Pin pitch: 0.5mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2,15,16,17,64) | Analog power supply | 1.8V ±0.1V supply for ADC core; requires local 0.1µF ceramic bypass per group to minimize switching noise coupling. |
| AINA+/AINA– (Pins 4/5) | Differential analog input A | Accepts 1.5VP-P differential signal with common-mode bias set by VCM; supports DC-coupled or AC-coupled RF inputs. |
| ENC+/ENC– (Pins 19/20) | Differential encode clock input | Edge-triggered sampling control; accepts sine, PECL, LVDS, TTL, or CMOS; duty cycle stabilizer improves jitter tolerance. |
| DA0_1+ / DA0_1– (Pins 42/43) | Channel A DDR LVDS data pair | Carries multiplexed DA0 (even) and DA1 (odd) bits synchronized to CLKOUT+ falling/rising edges; 100Ω on-chip termination optional. |
| CLKOUT+/CLKOUT– (Pins 40/41) | Data output clock | DDR-aligned clock output; phase delay programmable via SPI to compensate for board trace skew in high-speed routing. |
| PAR/SER (Pin 63) | Programming mode select | Ground = serial SPI mode (CS/SCK/SDI/SDO active); VDD = parallel mode (CS/SCK/SDI become discrete control inputs). |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Guarantees precise time alignment between Channel A and B for I/Q demodulation and beamforming without external synchronization overhead. |
| Programmable LVDS output current | 1.75mA or 3.5mA per pair - balances signal integrity against power consumption and EMI in space-constrained layouts. |
| Internal reference with external option | 1.25V ±25mV internal VREF or 1.2–1.3V external reference via SENSE pin - enables flexible input range scaling (±0.75V or ±0.6×VSENSE). |
| Sleep and Nap low-power modes | <5mW sleep mode (clock disabled); 184mW Nap mode (clocked) - extends uptime in portable test equipment and battery-backed monitoring systems. |
| SPI configuration interface | Read/write access to 8-bit mode control registers - allows runtime adjustment of output format, clock phase, and power states without hardware changes. |
Applications
| Cellular Basestation Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing 20MHz LTE FDD uplink band centered at 1.9GHz using undersampling architecture. IC Role / Device Role / Timing Role: Dual-channel ADC performs simultaneous I/Q sampling at 170Msps with 1250MHz analog bandwidth, feeding FPGA-based digital downconversion. Use Value: 90dB SFDR prevents adjacent channel interference; 6-cycle latency enables real-time AGC loop closure within 35ns. | Use Scenario: Wideband spectrum analyzer front-end covering 100MHz–2GHz with reconfigurable bandwidth and modulation schemes. IC Role / Device Role / Timing Role: High-linearity ADC captures instantaneous wideband signals for FFT-based spectral analysis and real-time demodulation. Use Value: 70dB SNR preserves dynamic range across multi-tone signals; DDR LVDS outputs reduce FPGA pin count and routing complexity. |
| Medical Ultrasound Imaging | High-Speed Test & Measurement |
Use Scenario: Beamformed echo digitization in portable ultrasound systems with 5–15MHz transducer arrays. IC Role / Device Role / Timing Role: Dual-channel ADC acquires time-aligned RF echoes from multiple transducer elements for digital beamforming. Use Value: ±0.85LSB INL ensures accurate amplitude mapping of tissue reflectivity; low 567mW power enables fanless handheld design. | Use Scenario: 16-bit oscilloscope digitizer capturing transient events up to 850MHz with 170Msps sustained rate. IC Role / Device Role / Timing Role: Precision ADC serves as front-end for high-resolution waveform capture with minimal aperture jitter and harmonic distortion. Use Value: 0.15psRMS aperture jitter enables sub-picosecond timing resolution; 1.5VP-P input range simplifies driver amplifier selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BCPZ-170 | 14-bit, 170Msps, JESD204B serial output (vs. DDR LVDS); 650mW power; 72dB SNR @ 10MHz. | Requires FPGA with JESD204B PHY; better suited for high-channel-count systems where lane count reduction is critical. | Select AD9257BCPZ-170 when migrating to serial interface architecture and JESD204B ecosystem compatibility is prioritized over LVDS simplicity. |
| LTC2156IUP-14#TRPBF | Same pinout, 210Msps max sampling rate, 616mW power, identical SNR/SFDR specs and feature set. | Direct upgrade path for higher throughput without layout change; suitable when system clock margin allows 210Msps operation. | Select LTC2156IUP-14#TRPBF when additional 40Msps headroom is needed for future-proofing or wider instantaneous bandwidth requirements. |
Compared with AD9257BCPZ-170, LTC2155IUP-14#TRPBF offers simpler board-level integration via LVDS and lower power, while LTC2156IUP-14#TRPBF provides a seamless pin-compatible speed upgrade without firmware or layout revision.
Availability
LTC2155IUP-14#TRPBF is available at Aetrix Electronics and suitable for cellular basestation receivers, software-defined radios, and medical ultrasound systems requiring stable component supply across extended industrial temperature ranges.
Supply support for LTC2155IUP-14#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTC2155 series belongs to Linear's high-speed precision ADC product line, designed specifically for RF-sampling applications in communications, instrumentation, and imaging where wide bandwidth, low distortion, and deterministic latency are critical.
FAQ
What is the operating temperature range for the LTC2155IUP-14#TRPBF?
The LTC2155IUP-14#TRPBF is rated for industrial operation from –40°C to +85°C, as indicated by the "I" grade suffix. This range is validated across all key specifications including SNR, SFDR, INL, and power consumption, making it suitable for outdoor basestation and ruggedized test equipment deployments.
Does the LTC2155IUP-14#TRPBF support external voltage reference?
Yes, the LTC2155IUP-14#TRPBF supports external reference via the SENSE pin. Applying 1.2V to 1.3V to SENSE configures the input range to ±0.6 × VSENSE (e.g., ±0.72V for 1.2V reference), while connecting SENSE to VDD selects the internal 1.25V reference and ±0.75V range. Both configurations maintain full 14-bit performance.
How many LVDS data pairs does the LTC2155IUP-14#TRPBF provide?
The LTC2155IUP-14#TRPBF provides 14 LVDS data pairs: 7 for Channel A (DA0_1 through DA12_13) and 7 for Channel B (DB0_1 through DB12_13), each carrying two multiplexed bits per DDR cycle. Additionally, OF+/OF– provides overflow/underflow status, and CLKOUT+/CLKOUT– supplies the DDR-aligned clock.
Can the LTC2155IUP-14#TRPBF be used in pin-compatible designs with the LTC2156IUP-14#TRPBF?
Yes, the LTC2155IUP-14#TRPBF is fully pin-compatible with the LTC2156IUP-14#TRPBF and LTC2157IUP-14#TRPBF. All share identical 64-pin QFN packaging, pin functions, power sequencing, and register map - enabling drop-in replacement for speed binning or qualification flexibility without PCB redesign.
What is the minimum required bypass capacitance for VDD pins on the LTC2155IUP-14#TRPBF?
Each VDD pin group (Pins 1/2/64 and Pins 15/16/17) requires a minimum 0.1µF ceramic capacitor placed as close as possible to the pins. Additional bulk capacitance (e.g., 4.7µF tantalum or polymer) is recommended on the 1.8V rail upstream to stabilize supply during high-frequency switching transients.
LTC2155IUP-14#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:
- 14
- Sampling Rate (Per Second):
- 170M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2155IUP-14#TRPBF FAQ
1.How can I place an order for LTC2155IUP-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2155IUP-14#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 LTC2155IUP-14#TRPBF reliable?
The price and inventory of LTC2155IUP-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2155IUP-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2155IUP-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2155IUP-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2155IUP-14#TRPBF?
LTC2155IUP-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2155IUP-14#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 LTC2155IUP-14#TRPBF?
For technical support, including LTC2155IUP-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2155IUP-14#TRPBF requirements.
6.How does Aetrix verify that LTC2155IUP-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2155IUP-14#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 LTC2155IUP-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2155IUP-14#TRPBF?
All LTC2155IUP-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2155IUP-14#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 LTC2155IUP-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2155IUP-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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