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Analog Devices Inc. LTC2144IUP-12#PBF
- Part No.:
- LTC2144IUP-12#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2144IUP-12#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:128
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Product details
Overview
LTC2144IUP-12#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, dual-channel, simultaneous-sampling analog-to-digital converter with 105Msps sampling rate, 70.5dB SNR, and 89dB SFDR. It operates from a single 1.8V supply, supports CMOS/DDR CMOS/DDR LVDS outputs, and targets high-performance communications systems including software-defined radios and portable medical imaging.
For engineers reviewing the LTC2144IUP-12#PBF datasheet, LTC2144IUP-12#PBF pinout, LTC2144IUP-12#PBF application, or LTC2144IUP-12#PBF equivalent, key selection criteria include guaranteed 105Msps operation across –40°C to +85°C, differential input bandwidth up to 750MHz, ultralow 0.10psRMS jitter in differential encode mode, and configurable power modes (Nap: 16mW, Sleep: 1mW).
Technical Context
The LTC2144IUP-12#PBF implements two independent 12-bit ADC cores sharing a common sample-and-hold with 750MHz full-power bandwidth and 0.3LSBRMS transition noise. Its digital interface supports three output formats-full-rate CMOS, DDR CMOS, and DDR LVDS-with separate OVDD supply (1.1V–1.9V) enabling flexible voltage-level translation.
Configuration is handled via SPI-compatible serial port (CS/SCK/SDI/SDO) or parallel logic inputs, with on-chip features including clock duty cycle stabilizer, data output randomizer, and programmable input range (1VP-P to 2VP-P). DC accuracy includes ±0.3LSB INL and ±0.1LSB DNL over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature - ensures monotonicity and full code coverage in precision measurement. |
| Sampling Rate | 105Msps - enables Nyquist-limited digitization of signals up to 52.5MHz without aliasing. |
| SNR | 70.5dB at 70MHz input - delivers >11.5 effective bits for demanding IF sampling applications. |
| SFDR | 89dB at 70MHz input - suppresses spurious content critical for multi-tone signal integrity in SDRs. |
| Power Dissipation | 144mW total at 105Msps (72mW per channel) - enables thermal management in dense RF front-end layouts. |
| Input Bandwidth | 750MHz full-power - supports undersampling of 2nd/3rd IF bands in cellular base station receivers. |
| Jitter | 0.10psRMS (differential encode) - limits aperture uncertainty to <0.02% ENOB loss at 140MHz input. |
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 pitch: 0.5mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (1,16,17,64) | Analog supply input | 1.7V–1.9V rail powering ADC core and reference; requires local 0.1μF ceramic bypass. |
| AIN1+/AIN1– (4,5) | Differential analog input CH1 | Accepts 1VP-P to 2VP-P differential signal; common-mode biased by VCM1. |
| ENC+/ENC– (18,19) | Differential encode clock input | Starts conversion on rising/falling edges; supports PECL/LVDS/TTL/CMOS drive. |
| D1_0–D1_11 / D2_0–D2_11 (47–58, 27–32, 38–39) | Parallel digital outputs | 12-bit DDR CMOS or DDR LVDS data per channel; output format selected via SCK/CS in parallel mode. |
| PAR/SER (11) | Programming mode select | Ground = serial SPI control; VDD = parallel logic control - determines function of CS/SCK/SDI/SDO pins. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Guarantees matched gain/offset and timing between channels for coherent I/Q demodulation. |
| Selectable output interface | CMOS/DDR CMOS/DDR LVDS - allows direct interfacing to FPGAs (LVDS) or ASICs (CMOS) without level-shifting. |
| Configurable input range | 1VP-P to 2VP-P differential - optimizes dynamic range for varying signal amplitudes without external gain stages. |
| Low-power Nap/Sleep modes | 16mW Nap, 1mW Sleep - enables rapid wake-up in battery-powered portable medical or test equipment. |
| On-chip clock duty cycle stabilizer | Compensates for >40%–60% input clock duty cycle variation - eliminates need for external clock conditioning circuitry. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing dual IF paths (I/Q) in macrocell LTE/5G transceivers operating at 70–140MHz. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing time-aligned I/Q samples for digital downconversion and MIMO processing. Use Value: 89dB SFDR prevents intermodulation distortion from adjacent channels; 750MHz bandwidth supports direct IF sampling without analog filtering. | Use Scenario: Reconfigurable RF front-end in military/commercial SDR platforms requiring wide instantaneous bandwidth. IC Role / Device Role / Timing Role: High-fidelity digitizer capturing multi-MHz signal blocks for real-time spectrum analysis and waveform synthesis. Use Value: 70.5dB SNR preserves signal fidelity across 105Msps bandwidth; DDR LVDS outputs reduce FPGA I/O count and EMI. |
| Portable Medical Imaging | Multi-Channel Data Acquisition |
Use Scenario: Ultrasound beamformer digitizing echo returns from phased-array transducers with low latency. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring synchronized RF echoes from adjacent receive channels for digital beamforming. Use Value: ±0.1LSB DNL ensures accurate amplitude linearity for tissue contrast; 144mW total power enables compact, fanless handheld designs. | Use Scenario: High-channel-count test equipment capturing transient waveforms across multiple sensors simultaneously. IC Role / Device Role / Timing Role: Precision dual ADC used in modular DAQ systems where channel-to-channel skew must be minimized. Use Value: Guaranteed simultaneous sampling and ±1.5mV offset matching enable sub-degree phase coherence across channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 12-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9233BCPZ-105 | 12-bit, 105Msps, single-channel only; 70.2dB SNR; requires external clock buffer for low jitter. | Lacks simultaneous dual-channel sampling; needs two devices for I/Q, increasing board area and skew risk. | Choose when single-channel density suffices and system-level timing alignment is managed externally. |
| LTC2145IUP-12#PBF | Same family, 125Msps sampling rate; 183mW power; identical pinout and feature set. | Higher speed variant with same footprint - suitable when design margin requires >105Msps capability. | Direct drop-in upgrade path if future-proofing for higher sample rates is needed without layout change. |
Compared with AD9233BCPZ-105, LTC2144IUP-12#PBF provides true simultaneous dual-channel acquisition in one package, reducing component count and inter-channel skew. Compared with LTC2145IUP-12#PBF, it trades 20Msps speed for 39mW lower power - ideal for thermally constrained portable applications.
Availability
LTC2144IUP-12#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging systems requiring stable component supply across extended temperature ranges.
Supply support for LTC2144IUP-12#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 industrial, automotive, communications, and healthcare markets.
The LTC2144IUP-12#PBF belongs to ADI's high-speed ADC product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, low power, and exceptional dynamic range.
FAQ
What is the operating temperature range for the LTC2144IUP-12#PBF?
The LTC2144IUP-12#PBF is rated for industrial temperature operation from –40°C to +85°C, as indicated by the "I" grade in the part number. This range is validated across all key specifications including SNR, SFDR, INL, and power consumption, making it suitable for outdoor base stations and ruggedized portable equipment where ambient conditions vary widely.
Does the LTC2144IUP-12#PBF support differential analog input only?
No, the LTC2144IUP-12#PBF supports both differential and single-ended analog inputs. Differential mode uses AIN1+/AIN1– and AIN2+/AIN2– pairs with common-mode bias from VCM1/VCM2. Single-ended operation is possible by AC-coupling each input to VCMx and grounding the complementary pin, though differential mode delivers superior CMRR (>80dB) and dynamic performance.
How does the PAR/SER pin affect the functionality of CS, SCK, SDI, and SDO on the LTC2144IUP-12#PBF?
When PAR/SER = GND, the LTC2144IUP-12#PBF enters serial programming mode: CS becomes chip select, SCK is the serial clock, SDI is data-in, and SDO is open-drain data-out for register readback. When PAR/SER = VDD, it enters parallel mode: CS controls the clock duty cycle stabilizer, SCK selects output format (CMOS/LVDS), SDI enables shutdown, and SDO is unused - enabling hardware-configured operation without firmware overhead.
Can the LTC2144IUP-12#PBF achieve its specified 70.5dB SNR using single-ended encode clock inputs?
No - the 70.5dB SNR specification for the LTC2144IUP-12#PBF is guaranteed only with differential encode inputs (ENC+/ENC–). Single-ended encode (ENC– tied to GND) increases jitter to 0.12psRMS, degrading SNR by ~0.8dB at 70MHz input. For full spec compliance, use differential clock sources such as LVDS or transformer-coupled sine waves.
What is the purpose of the SENSE pin on the LTC2144IUP-12#PBF, and what voltage range should it be driven with?
The SENSE pin on the LTC2144IUP-12#PBF sets the internal reference voltage for the ADC core when external reference mode is enabled. It accepts 0.625V to 1.300V, with typical operation at 1.250V. Driving SENSE within this range directly scales the full-scale input range (1VP-P to 2VP-P) and affects SNR - optimal SNR occurs near 1.25V, dropping ~0.3dB at 0.625V or 1.300V per the G15/G30/G45 plots.
LTC2144IUP-12#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:
- 12
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2144IUP-12#PBF FAQ
1.How can I place an order for LTC2144IUP-12#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2144IUP-12#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 LTC2144IUP-12#PBF reliable?
The price and inventory of LTC2144IUP-12#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2144IUP-12#PBF is usually 5 days.
3.What payment methods are accepted for LTC2144IUP-12#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2144IUP-12#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2144IUP-12#PBF?
LTC2144IUP-12#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2144IUP-12#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 LTC2144IUP-12#PBF?
For technical support, including LTC2144IUP-12#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2144IUP-12#PBF requirements.
6.How does Aetrix verify that LTC2144IUP-12#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2144IUP-12#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 LTC2144IUP-12#PBF meets industry standards.
7.What is the process for return or replacement of LTC2144IUP-12#PBF?
All LTC2144IUP-12#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2144IUP-12#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 LTC2144IUP-12#PBF part is unused and in its original packaging.
Return procedure for LTC2144IUP-12#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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