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Analog Devices Inc. LTC2144CUP-14#PBF
- Part No.:
- LTC2144CUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2144CUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,851
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Product details
Overview
LTC2144CUP-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for high-frequency signal digitization in communications infrastructure. It delivers 72.9dB SNR and 90dB SFDR at 105Msps sampling rate, operates from a single 1.8V supply, supports CMOS/DDR CMOS/DDR LVDS outputs, and features 750MHz full-power bandwidth with ultralow 0.10psRMS jitter-enabling undersampling of IF signals in cellular base stations.
For engineers reviewing the LTC2144CUP-14#PBF datasheet, LTC2144CUP-14#PBF pinout, LTC2144CUP-14#PBF application, or LTC2144CUP-14#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed power and timing specs, real-world application mappings, and two rigorously cross-checked alternative parts for design-in flexibility.
Technical Context
The LTC2144CUP-14#PBF implements two independent 14-bit ADC cores with simultaneous sampling architecture, enabling coherent dual-channel acquisition critical for I/Q demodulation and beamforming. Its sample-and-hold stage achieves 750MHz full-power bandwidth and 0.10psRMS jitter in differential encode mode, directly supporting undersampling of 70MHz+ IF signals without external filtering.
Digital interface flexibility includes full-rate CMOS, DDR CMOS, or DDR LVDS output modes, with separate OVDD supply (1.1–1.9V) allowing output swing control. Configuration is managed via SPI port (CS/SCK/SDI/SDO) or parallel logic inputs, and optional features include clock duty cycle stabilizer, data randomizer, and Nap/Sleep modes reducing power to 16mW/1mW respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature-ensures monotonicity and accurate amplitude representation in wide-dynamic-range applications. |
| Sampling Rate | 105Msps-supports Nyquist sampling of up to 52.5MHz baseband or undersampling of higher IF bands like 70MHz cellular LTE carriers. |
| SNR / SFDR | 72.9dB SNR and 90dB SFDR at 70MHz input-meets stringent linearity requirements for multi-carrier base station receivers. |
| Power Dissipation | 149mW total at 105Msps (75mW per channel)-enables thermal management in dense RF front-end modules without forced cooling. |
| Analog Supply | Single 1.8V VDD (1.7–1.9V range)-simplifies power delivery and reduces BOM count versus dual-supply ADCs. |
| Input Bandwidth | 750MHz full-power bandwidth-preserves signal integrity for wideband radar or broadband instrumentation inputs. |
| Jitter Performance | 0.10psRMS aperture jitter in differential encode mode-limits SNR degradation when undersampling GHz-range IF signals. |
Pinout & Package
64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND), requiring soldering to PCB ground plane for thermal and electrical performance. Pin functions are validated per Linear Technology's official datasheet revision.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,16,17,64) | Analog power supply | 1.7–1.9V supply for ADC core; requires local 0.1μF ceramic bypass-adjacent pins may share capacitor. |
| AIN1+/AIN1– (Pins 4,5) | Channel 1 differential analog input | Accepts 1–2VP-P input range; common-mode biased by VCM1 (Pin 2) at ~0.9V for optimal linearity. |
| ENC+/ENC– (Pins 18,19) | Differential encode clock input | Rising edge on ENC+ initiates conversion; ENC– tied to GND enables single-ended mode-critical for jitter-sensitive timing. |
| PAR/SER (Pin 11) | Programming mode select | Ground = serial SPI mode (CS/SCK/SDI/SDO active); VDD = parallel mode (logic-level control of key functions). |
| OVDD (Pin 42) | Digital output supply | 1.1–1.9V supply setting CMOS output swing (1.2–1.8V) or enabling LVDS termination-decouples analog/digital noise. |
| D1_0–D1_13 / D2_0–D2_13 (Pins 45–48,50–58,25–32,34–38) | Parallel digital data outputs | Two 14-bit buses (CH1/CH2); pin grouping varies by output mode (CMOS vs DDR LVDS)-requires mode-specific PCB layout. |
| SENSE (Pin 63) | Reference and input range programming | Connect to VDD → ±1V range; to GND → ±0.5V; to external 0.625–1.3V → ±0.8×VSENSE-enables flexible signal scaling. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Guarantees phase-matched acquisition across channels-essential for I/Q signal processing and MIMO antenna systems. |
| Configurable output interface | Hardware-selectable CMOS / DDR CMOS / DDR LVDS modes allow optimization for board density (CMOS), speed (DDR), or noise immunity (LVDS). |
| Low-power operating modes | Nap mode (16mW) and Sleep mode (1mW) enable rapid power-state transitions during burst-mode operation in portable SDRs. |
| Integrated reference system | Internal 1.25V VREF (±25ppm/°C drift) and programmable VCM outputs eliminate need for external reference buffers in most layouts. |
| Ultralow-jitter sample-and-hold | 0.10psRMS jitter enables clean undersampling of 70MHz+ IF signals without degrading SNR-reducing front-end filter complexity. |
Applications
| Cellular Base Station Receiver | Portable Medical Ultrasound |
|---|---|
Use Scenario: Digitizing dual-channel I/Q downconverted signals from LTE/FDD/TDD radio front-ends operating at 70–90MHz IF. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing time-aligned 14-bit samples for digital demodulation and channel estimation. Use Value: 90dB SFDR prevents intermodulation distortion between adjacent carriers; 105Msps sampling supports 2× oversampling for improved noise shaping. |
Use Scenario: Acquiring echo return signals from phased-array transducers in handheld ultrasound scanners. IC Role / Device Role / Timing Role: Dual-channel ADC capturing time-coherent RF echoes for beamforming and Doppler processing. Use Value: 72.9dB SNR preserves low-amplitude tissue contrast; 750MHz bandwidth captures harmonics for harmonic imaging modes. |
| Software Defined Radio (SDR) | Multi-Channel Data Acquisition |
Use Scenario: Wideband spectrum monitoring across 0–50MHz using direct-sampling architecture in field-deployable SDR platforms. IC Role / Device Role / Timing Role: High-linearity dual ADC enabling real-time FFT analysis and signal classification without analog preselection. Use Value: 14-bit resolution and 750MHz bandwidth support instantaneous capture of >100MHz instantaneous bandwidth with minimal aliasing. |
Use Scenario: Synchronized voltage/current measurement across four phases in industrial motor drive diagnostics. IC Role / Device Role / Timing Role: Two LTC2144CUP-14#PBF devices used in parallel for eight-channel 14-bit acquisition with sub-ns inter-channel skew. Use Value: Simultaneous sampling eliminates phase error between channels; 0.10psRMS jitter ensures precise time-of-flight measurements. |
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 |
|---|---|---|---|
| AD9253BCPZ-105 | 14-bit, 105Msps, single-channel only; requires two devices for dual-channel operation; 73.2dB SNR at 70MHz. | Lacks simultaneous sampling-inter-device skew limits I/Q coherence; higher board area and routing complexity. | Select when channel isolation > phase matching is prioritized, or when existing design uses ADI ecosystem tools. |
| LTC2264IUP-14#PBF | 14-bit, 80Msps, dual-channel, same QFN-64 package; 72.5dB SNR; lower power (113mW) but reduced speed and bandwidth (550MHz). | Suitable for cost-sensitive or thermally constrained designs where 80Msps suffices (e.g., narrowband comms or legacy radar). | Choose for drop-in replacement in space-constrained layouts needing lower power, accepting 25Msps speed reduction. |
Compared with AD9253BCPZ-105, the LTC2144CUP-14#PBF delivers true simultaneous sampling in one package-eliminating inter-chip skew and simplifying layout-while offering identical speed and superior SFDR. Against LTC2264IUP-14#PBF, it trades 25Msps higher throughput and 200MHz wider bandwidth for +36mW power, targeting performance-critical IF sampling.
Availability
LTC2144CUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, portable medical imaging, software-defined radio, and multi-channel test equipment requiring stable component supply across long production lifecycles.
Supply support for LTC2144CUP-14#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, communications, industrial, and healthcare markets.
The LTC2144CUP-14#PBF belongs to Linear's high-speed precision ADC family designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, low jitter, and flexible digital interfacing.
FAQ
What is the maximum sampling rate supported by the LTC2144CUP-14#PBF?
The LTC2144CUP-14#PBF supports a maximum sampling rate of 105Msps, as specified in its ordering part number suffix "-14" and confirmed in the Electrical Characteristics table. This rate is guaranteed across the full 0°C to 70°C operating temperature range for the C-grade version, enabling reliable digitization of signals up to 52.5MHz under Nyquist criteria or higher frequencies via undersampling.
Does the LTC2144CUP-14#PBF support differential analog inputs?
Yes, the LTC2144CUP-14#PBF is explicitly designed for differential analog inputs on both channels (AIN1+/AIN1– and AIN2+/AIN2–). The datasheet specifies ±1LSB INL and ±0.3LSB DNL performance under differential drive conditions, and common-mode rejection ratio is rated at 80dB-confirming robust operation with transformer-coupled or fully differential amplifier front-ends.
What output interface options does the LTC2144CUP-14#PBF provide?
The LTC2144CUP-14#PBF supports three configurable digital output interfaces: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Selection is controlled via the PAR/SER pin and internal registers. CMOS modes use OVDD=1.2–1.8V for swing control; LVDS mode enables on-chip 100Ω termination and differential signaling for noise-immune transmission over longer traces.
How is the input voltage range configured on the LTC2144CUP-14#PBF?
The input voltage range of the LTC2144CUP-14#PBF is set via the SENSE pin (Pin 63): connecting SENSE to VDD selects ±1V range; to GND selects ±0.5V; applying an external 0.625–1.3V reference sets ±0.8×VSENSE. This configuration is active across all operating modes and is validated in the Analog Input section of the datasheet with min/max specifications.
What power-saving modes are available on the LTC2144CUP-14#PBF?
The LTC2144CUP-14#PBF offers two low-power states: Nap mode (16mW total dissipation) and Sleep mode (1mW). Both are entered via SPI register writes or parallel control pins, and maintain register contents during Nap mode. These modes are documented in the Power Requirements table and enable rapid wake-up for burst-mode acquisition in battery-powered SDR or portable medical devices.
LTC2144CUP-14#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):
- 105M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel, 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2144CUP-14#PBF FAQ
1.How can I place an order for LTC2144CUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2144CUP-14#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 LTC2144CUP-14#PBF reliable?
The price and inventory of LTC2144CUP-14#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2144CUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2144CUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2144CUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2144CUP-14#PBF?
LTC2144CUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2144CUP-14#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 LTC2144CUP-14#PBF?
For technical support, including LTC2144CUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2144CUP-14#PBF requirements.
6.How does Aetrix verify that LTC2144CUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2144CUP-14#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 LTC2144CUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2144CUP-14#PBF?
All LTC2144CUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2144CUP-14#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 LTC2144CUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2144CUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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