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Analog Devices Inc. LTC2215CUP#TRPBF
- Part No.:
- LTC2215CUP#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2215CUP#TRPBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,263
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Product details
Overview
LTC2215CUP#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 65Msps low-noise analog-to-digital converter optimized for high-frequency signal digitization up to 400MHz full-power bandwidth. It features 81.5dBFS noise floor, 100dB spurious-free dynamic range (SFDR), and 85fsRMS aperture jitter, operating from a single 3.3V supply with 700mW power dissipation. It is used in cellular base station receivers requiring precise undersampling of RF/IF signals.
For engineers reviewing the LTC2215CUP#TRPBF datasheet, LTC2215CUP#TRPBF pinout, LTC2215CUP#TRPBF application, or LTC2215CUP#TRPBF equivalent, key selection criteria include its 65Msps sampling rate, LVDS/CMOS output flexibility, internal dither option, clock duty cycle stabilizer, and 64-pin QFN package compatibility with pin-equivalent LTC2208/LTC2217 designs.
Technical Context
The LTC2215CUP#TRPBF implements a 16-bit pipelined ADC architecture with integrated sample-and-hold, internal 2.5V bandgap reference (selectable via SENSE pin), and configurable digital outputs-either differential LVDS or single-ended CMOS (full-rate or demultiplexed). Its 400MHz input bandwidth supports undersampling of IF signals in communications receivers.
It accepts differential or single-ended encode clocks (PECL/LVDS/TTL/CMOS), includes an optional clock duty cycle stabilizer for robust timing at full speed, and supports internal dithering to improve SFDR at low input levels. The device operates over 0°C to 70°C and uses a fixed 2.75VP-P analog input range referenced to 1.575V common-mode voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sampling Rate | 65Msps - fixed maximum conversion rate; determines Nyquist zone and real-time data throughput. |
| Resolution | 16-bit - provides 96.3dB theoretical SNR ceiling and fine amplitude quantization for wide dynamic range signals. |
| Noise Floor | 81.5dBFS - measured at 5MHz input; defines minimum detectable signal level in receiver chain. |
| SFDR | 100dB - 2nd/3rd harmonic distortion performance at 5MHz; critical for multi-tone interference rejection. |
| Aperture Jitter | 85fsRMS - limits SNR degradation at high input frequencies; enables clean undersampling up to 140MHz. |
| Input Bandwidth | 400MHz - full-power -3dB bandwidth; supports direct sampling of L-band and lower S-band IF signals. |
| Power Dissipation | 700mW - at 65Msps with CMOS outputs; enables thermal management in dense RF front-end layouts. |
| Supply Voltage | 3.3V ±5% - single analog rail; simplifies power delivery vs dual-supply ADCs. |
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 2.75VP-P signal centered at 1.575V; high-impedance, 9.1pF capacitance in sample mode. |
| ENC+, ENC– | Differential encode clock input | Edge-triggered sampling control; supports sine wave, PECL, LVDS, TTL, or CMOS; internal 6.2kΩ bias. |
| SHDN | Shutdown control | Active-high logic input; places analog core in low-power state (17mW) and outputs in high-Z. |
| DITH | Internal dither enable | Active-high; adds controlled noise to improve SFDR at low input levels (e.g., –25dBFS). |
| SENSE | Reference mode select | Tie to VDD for internal 2.5V reference; accept external 2.5V or 1.25V for same 2.75VP-P full-scale range. |
| VCM | Common-mode bias output | 1.575V ±0.1V output; must be bypassed with ≥2.2μF ceramic capacitor to support analog input common-mode stability. |
| DB0–DB15 / DA0–DA15 | Digital output buses (demux) | B and A buses active in demultiplexed CMOS mode; DB15/DA15 = MSB; each bus runs at 32.5MHz. |
| LVDS, MODE, RAND | Output configuration controls | LVDS = high enables LVDS outputs; MODE selects CMOS bus format; RAND enables output data randomization. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low aperture jitter (85fsRMS) | Enables high-fidelity undersampling of 70MHz+ IF signals without significant SNR penalty. |
| Optional internal dither | Improves SFDR by up to 10dB at low input levels (e.g., 115dBFS at –25dBFS, 70MHz), suppressing harmonic artifacts. |
| Configurable digital outputs | Supports LVDS (standard or low-power) or CMOS (full-rate or demux); OVDD adjustable 0.5V–3.6V for interface voltage translation. |
| Integrated clock duty cycle stabilizer | Allows high-performance operation with encode clocks having 40%–60% duty cycle, relaxing clock generation requirements. |
| Pin-compatible upgrade path | Direct replacement for LTC2208 and LTC2217 in existing 64-pin QFN layouts, enabling performance upgrades without PCB redesign. |
| Low-power shutdown mode | Reduces power to 17mW while retaining fast wake-up (<1.5ms full-scale settling), ideal for time-division systems. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front-End |
|---|---|
|
Use Scenario: Digitizing 70MHz IF signals from heterodyne downconversion in LTE/FDD-TDD macrocell radios. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth for digital channelization and MIMO processing. Use Value: 100dB SFDR rejects adjacent-channel interferers; 85fsRMS jitter preserves EVM under 64-QAM modulation. |
Use Scenario: Real-time acquisition of 0–40MHz span with 10kHz RBW in portable spectrum analyzers. IC Role / Device Role / Timing Role: Primary digitizer feeding FFT engine; synchronized to precision clock source with duty cycle stabilizer enabled. Use Value: 81.5dBFS noise floor enables detection of –130dBm signals; 400MHz bandwidth supports harmonic analysis up to 3rd order. |
| ATE Digital Receiver Module | Medical Ultrasound Beamformer |
|
Use Scenario: Capturing multi-tone test stimuli (e.g., two 14/21MHz tones) to validate DUT linearity and IMD performance. IC Role / Device Role / Timing Role: Reference-grade ADC in calibration path; dither enabled to resolve low-level intermodulation products. Use Value: 100dB SFDR isolates 2nd/3rd harmonics; 16-bit resolution ensures <0.0015% gain error across temperature. |
Use Scenario: Digitizing 5–15MHz echo return signals from phased-array transducers with >120dB dynamic range requirement. IC Role / Device Role / Timing Role: Channel ADC in receive beamformer ASIC subsystem; LVDS outputs reduce EMI in high-density analog backplane. Use Value: 65Msps sampling satisfies Nyquist for 15MHz bandwidth; 700mW power enables integration into compact handheld units. |
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-65 | 16-bit, 65Msps; requires external reference and separate analog/digital supplies; no integrated dither or duty cycle stabilizer. | Used in military radar digitizers where external clock conditioning is already present; less suited for space-constrained comms boards. | Choose when system already provides precision external reference and dual 1.8V/3.3V rails; avoid if board area or BOM count must be minimized. |
| LTC2217CUP#TRPBF | 16-bit, 80Msps; identical pinout, package, and feature set; higher power (970mW) and improved SFDR at 70MHz (97dB vs 95dB). | Targeted for next-generation base stations requiring wider instantaneous bandwidth or tighter EVM specs. | Choose for performance uplift without layout change; verify thermal margin given +270mW increase over LTC2215CUP#TRPBF. |
Compared with AD9268BCPZ-65 and LTC2217CUP#TRPBF, the LTC2215CUP#TRPBF offers optimal balance of integrated features (dither, DCS, internal reference), lower power, and proven deployment in cost-sensitive telecom infrastructure-making it ideal for volume production where design-in simplicity and thermal efficiency are prioritized.
Availability
LTC2215CUP#TRPBF is available at Aetrix Electronics and suitable for cellular base station receivers, spectrum analyzers, ATE systems, and medical ultrasound equipment requiring stable component supply across multi-year production cycles.
Supply support for LTC2215CUP#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 DSP solutions for precision instrumentation, communications, and industrial applications.
The LTC2215CUP#TRPBF belongs to the LTC22xx family of ultra-low-noise, high-SFDR pipeline ADCs designed specifically for demanding wireless infrastructure, test equipment, and imaging systems requiring exceptional dynamic range at intermediate sampling rates.
FAQ
What is the maximum input frequency supported by the LTC2215CUP#TRPBF?
The LTC2215CUP#TRPBF supports a full-power analog input bandwidth of 400MHz (-3dB point), enabling direct undersampling of IF signals up to this frequency. Performance metrics such as SFDR and SNR are specified up to 140MHz, but the device maintains usable response beyond that-verified by typical FFT plots showing clean spectra at 140.5MHz input.
Does the LTC2215CUP#TRPBF require an external reference voltage?
No-the LTC2215CUP#TRPBF includes an internal 2.5V bandgap reference. Tying the SENSE pin to VDD selects this internal reference, establishing a fixed 2.75VP-P input range. An external 2.5V or 1.25V reference may also be applied to SENSE for identical full-scale range, offering flexibility in systems with precision reference sources.
How does the internal dither function improve performance in the LTC2215CUP#TRPBF?
When enabled via the DITH pin, internal dither adds calibrated noise to the ADC core, breaking up harmonic correlation and raising the effective noise floor. This improves SFDR by up to 10dB at low input levels-for example, from 105dBFS to 115dBFS at –25dBFS and 70MHz-without increasing analog input noise or requiring external circuitry.
Can the LTC2215CUP#TRPBF operate with a non-50% encode clock duty cycle?
Yes-the LTC2215CUP#TRPBF includes an optional clock duty cycle stabilizer (DCS) that corrects encode clock asymmetry. With DCS enabled, the device maintains full AC performance (SNR/SFDR) across 40%–60% duty cycle ranges, eliminating the need for external clock reshaping circuits in systems using crystal oscillators or PLLs with variable duty cycle.
What is the power-down behavior of the LTC2215CUP#TRPBF during SHDN assertion?
Asserting SHDN high reduces total power dissipation to 17mW and places all digital outputs in high-impedance state. Analog circuitry powers down, but full-scale settling occurs within 1.5ms after SHDN deassertion-verified by mid-scale and full-scale settling curves in the datasheet-making it suitable for TDMA or burst-mode applications.
LTC2215CUP#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):
- 65M
- 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:
- -
LTC2215CUP#TRPBF FAQ
1.How can I place an order for LTC2215CUP#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2215CUP#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 LTC2215CUP#TRPBF reliable?
The price and inventory of LTC2215CUP#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2215CUP#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2215CUP#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2215CUP#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2215CUP#TRPBF?
LTC2215CUP#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2215CUP#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 LTC2215CUP#TRPBF?
For technical support, including LTC2215CUP#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2215CUP#TRPBF requirements.
6.How does Aetrix verify that LTC2215CUP#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2215CUP#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 LTC2215CUP#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2215CUP#TRPBF?
All LTC2215CUP#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2215CUP#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 LTC2215CUP#TRPBF part is unused and in its original packaging.
Return procedure for LTC2215CUP#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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