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Analog Devices Inc. LTC2285CUP#PBF
- Part No.:
- LTC2285CUP#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2285CUP#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
LTC2285CUP#PBF from Analog Devices (formerly Linear Technology) is a dual 14-bit, 125Msps low-power 3V analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in communications and imaging systems. It delivers 72.4dB SNR and 88dB SFDR at 5MHz input, ±1.5LSB INL, and operates from a single 2.85V–3.4V supply with 790mW total power dissipation.
For engineers reviewing the LTC2285CUP#PBF datasheet, LTC2285CUP#PBF pinout, LTC2285CUP#PBF application, or LTC2285CUP#PBF equivalent, key selection considerations include dual-channel synchronization, 640MHz full-power bandwidth, clock duty cycle stabilization, flexible 1VP-P to 2VP-P input range, and 64-pin QFN package thermal and layout requirements.
Technical Context
The LTC2285CUP#PBF implements a six-stage CMOS pipelined ADC architecture per channel, achieving 5-cycle pipeline latency and supporting simultaneous sampling via independent CLKA/CLKB inputs or synchronized operation when tied together. Its sample-and-hold features 0.2psRMS aperture jitter and 640MHz full-power bandwidth.
It integrates dual independent reference paths (REFHA/REFLA and REFHB/REFLB), programmable input ranges via SENSEA/SENSEB pins, and configurable output formats (offset binary or 2's complement) controlled by the MODE pin. The CLKOUT signal provides data-ready timing derived from CLKB with ≤0.6ns skew relative to data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full code coverage across full dynamic range. |
| Sample Rate | 125Msps - supports Nyquist-limited IF sampling up to 62.5MHz with sufficient margin for anti-alias filtering. |
| SNR @ 5MHz | 72.4dBFS - enables >12-bit effective resolution for narrowband RF receiver applications. |
| SFDR @ 5MHz | 88dBc - suppresses spurious content critical for multi-carrier communication systems like LTE and DOCSIS. |
| Channel Isolation | –110dB at 100MHz - prevents crosstalk-induced distortion in dual-signal acquisition such as I/Q demodulation. |
| Power Dissipation | 790mW at 125Msps - balances performance and thermal load in space-constrained 9mm × 9mm QFN layouts. |
| Input Bandwidth | 640MHz - accommodates wideband direct RF sampling without external pre-filtering below 300MHz. |
| Transition Noise | 1.3LSBRMS - minimizes quantization uncertainty in precision measurement and spectral analysis. |
Pinout & Package
The LTC2285CUP#PBF is housed in a 64-lead (9mm × 9mm) plastic QFN package with exposed pad (Pin 65) requiring solder connection to PCB ground for thermal and electrical integrity. Package meets RoHS-compliant lead-free finish standards (PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINA+, AINA– | Differential analog input Channel A | Accepts ±0.5V to ±1V differential signal; requires matched 100Ω source impedance for optimal SFDR. |
| AINB+, AINB– | Differential analog input Channel B | Independent acquisition path; supports time-interleaved or I/Q sampling with <–110dB crosstalk at 100MHz. |
| CLKA, CLKB | Sampling clock inputs | Single-ended CMOS-compatible; rising-edge triggered; supports independent or synchronized dual-channel sampling. |
| DA0–DA13, DB0–DB13 | Parallel digital outputs | 14-bit LVCMOS outputs; configurable MSB-first; driven by separate OVDD (0.5V–3.6V) for logic-level flexibility. |
| CLKOUT | Data-ready strobe | Derived from CLKB; falling edge latches valid data; ≤0.6ns skew ensures reliable capture timing. |
| SHDNA, SHDNB | Per-channel shutdown control | Enables nap/sleep modes reducing power to 15mW or 2mW per channel while preserving configuration state. |
| MODE | Output format & duty cycle stabilizer | Selects offset binary/2's complement and enables/disables internal clock duty cycle correction for robust high-speed timing. |
| SENSEA, SENSEB | Input range programming | Sets ±0.5V (to VCMA/VCMB), ±1V (to VDD), or custom ±VSENSE range - enables dynamic input scaling without external gain stages. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 14-bit ADC cores | Enables synchronous I/Q sampling or time-interleaved architectures without external multiplexing or clock skew compensation. |
| 640MHz full-power analog bandwidth | Supports direct RF sampling of L-band and lower S-band signals without intermediate frequency conversion stages. |
| Integrated clock duty cycle stabilizer | Compensates for >40%–60% input clock duty cycle variation, eliminating need for external duty cycle correction circuits. |
| Flexible 1VP-P to 2VP-P input range | Reduces requirement for external programmable gain amplifiers in multi-standard receivers (e.g., LTE/WiMAX/DOCSIS). |
| 110dB channel isolation at 100MHz | Ensures minimal inter-channel interference in dual-path architectures such as MIMO baseband processing. |
| Low 1.3LSBRMS transition noise | Improves histogram stability and reduces code-width variation critical for high-accuracy metrology and test equipment. |
Applications
| Wireless Baseband Receiver | Medical Ultrasound Imaging |
|---|---|
Use Scenario: Digitizing I/Q downconverted signals from zero-IF or low-IF radio front-ends in LTE-A and 5G NR base stations. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC providing synchronized 14-bit I and Q data streams at 125Msps with sub-1ps timing skew. Use Value: Enables real-time digital beamforming and MIMO processing with 72.4dB SNR and –110dB crosstalk, minimizing adjacent-channel interference. | Use Scenario: Capturing echo return signals from phased-array transducers operating at 2–15MHz center frequencies. IC Role / Device Role / Timing Role: High-fidelity analog front-end digitizer delivering 640MHz input bandwidth and 72.2dB SNR at 70MHz input for deep-tissue resolution. Use Value: Supports 12+ bit effective resolution required for Doppler shift detection and tissue harmonic imaging without analog gain compression. |
| Spectral Analysis Instrumentation | Portable Test & Measurement Equipment |
Use Scenario: Real-time FFT-based spectrum monitoring in EMI/EMC compliance testers and signal intelligence receivers. IC Role / Device Role / Timing Role: Wideband digitizer capturing 125Msps continuous streaming with 88dB SFDR to resolve weak spurs amid strong interferers. Use Value: Delivers >100dB spurious-free dynamic range over 60MHz instantaneous bandwidth, enabling accurate mask testing per CISPR 16-1-1. | Use Scenario: Battery-powered handheld oscilloscopes and vector signal analyzers requiring low power and high fidelity. IC Role / Device Role / Timing Role: Dual-channel acquisition engine with nap mode (15mW/channel) and 790mW active power for extended field operation. Use Value: Achieves 14-bit resolution at 125Msps while maintaining thermal profile compatible with fanless aluminum enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9233BCPZ-125 | 12-bit, 125Msps, single-channel only; no integrated clock stabilizer; 650MHz bandwidth; 70.2dB SNR @ 70MHz. | Lacks dual-channel synchronization and crosstalk isolation; requires external clock conditioning for duty cycle correction. | Choose when 12-bit resolution suffices and board space allows separate clock cleanup circuitry. |
| LTC2283CUP#PBF | 12-bit, 125Msps, pin-compatible dual ADC; 70.5dB SNR @ 70MHz; identical package, pinout, and power architecture. | Same footprint and interface but trades 2 bits of resolution for improved SFDR margin and lower cost in less demanding SNR applications. | Select for cost-sensitive designs where 12-bit ENOB meets system requirements and layout reuse is prioritized. |
Compared with AD9233BCPZ-125 and LTC2283CUP#PBF, the LTC2285CUP#PBF uniquely delivers 14-bit resolution with dual-channel isolation and integrated clock stabilization - essential for coherent I/Q sampling and compact RF instrumentation where SNR and spurious suppression are non-negotiable.
Availability
LTC2285CUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical ultrasound, spectral analysis, and portable test equipment requiring stable component supply across industrial temperature grades and long-term production cycles.
Supply support for LTC2285CUP#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 high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, industrial, communications, and healthcare markets.
The LTC2285CUP#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding RF and instrumentation applications requiring simultaneous dual-channel sampling, wide analog bandwidth, and low-noise digitization at 125Msps.
FAQ
What is the operating temperature range for the LTC2285CUP#PBF?
The LTC2285CUP#PBF is rated for commercial temperature operation from 0°C to 70°C, as indicated by the "C" grade suffix in the part number. This distinguishes it from the industrial-grade LTC2285IUP#PBF (–40°C to 85°C). Thermal design must account for its 790mW power dissipation and exposed-pad thermal path in the 9mm × 9mm QFN package.
Does the LTC2285CUP#PBF support single-ended analog input?
Yes, the LTC2285CUP#PBF supports single-ended input drive: connect AIN+ to the signal and AIN– to 1.5V (VCM) or a DC bias. However, this degrades harmonic distortion and INL performance versus differential drive; SNR and DNL remain unaffected. For optimal AC performance, differential drive with matched 100Ω source impedance is recommended.
How does the MODE pin configure output format and clock stabilization on the LTC2285CUP#PBF?
The MODE pin on the LTC2285CUP#PBF selects both output coding and clock duty cycle stabilization: GND = offset binary + stabilizer off; 1/3 VDD = offset binary + stabilizer on; 2/3 VDD = 2's complement + stabilizer on; VDD = 2's complement + stabilizer off. This single-pin control applies identically to both channels.
Can the LTC2285CUP#PBF operate with different input voltage ranges on Channel A and Channel B?
Yes - SENSEA and SENSEB are independently configurable. SENSEA sets Channel A's input range (±0.5V, ±1V, or ±VSENSEA); SENSEB sets Channel B's range (±0.5V, ±1V, or ±VSENSEB). This enables asymmetric signal conditioning, e.g., digitizing a high-dynamic-range I path and a lower-amplitude Q path without external attenuators or gain stages.
What is the function of the OF (overflow/underflow) pin on the LTC2285CUP#PBF?
OF is an open-drain output that asserts high when either Channel A or Channel B experiences overflow (code = 0x3FFF) or underflow (code = 0x0000), indicating input signal clipping beyond the selected full-scale range. It serves as a real-time saturation flag for automatic gain control (AGC) loops or diagnostic logging in systems using the LTC2285CUP#PBF.
LTC2285CUP#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):
- 125M
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- 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:
- 2.85V ~ 3.4V
- Voltage - Supply, Digital:
- 2.85V ~ 3.4V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2285CUP#PBF FAQ
1.How can I place an order for LTC2285CUP#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2285CUP#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 LTC2285CUP#PBF reliable?
The price and inventory of LTC2285CUP#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2285CUP#PBF is usually 5 days.
3.What payment methods are accepted for LTC2285CUP#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2285CUP#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2285CUP#PBF?
LTC2285CUP#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2285CUP#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 LTC2285CUP#PBF?
For technical support, including LTC2285CUP#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2285CUP#PBF requirements.
6.How does Aetrix verify that LTC2285CUP#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2285CUP#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 LTC2285CUP#PBF meets industry standards.
7.What is the process for return or replacement of LTC2285CUP#PBF?
All LTC2285CUP#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2285CUP#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 LTC2285CUP#PBF part is unused and in its original packaging.
Return procedure for LTC2285CUP#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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