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Analog Devices Inc. LTC2152CUJ-14#PBF
- Part No.:
- LTC2152CUJ-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC2152CUJ-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
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Product details
Overview
LTC2152CUJ-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 250Msps pipeline analog-to-digital converter optimized for high-frequency undersampling in communications and instrumentation systems. It delivers 70dB SNR, 90dB SFDR, 1.25GHz full-power bandwidth, DDR LVDS outputs, and operates from a single 1.8V supply with 356mW total power consumption.
For engineers reviewing the LTC2152CUJ-14#PBF datasheet, LTC2152CUJ-14#PBF pinout, LTC2152CUJ-14#PBF application, or LTC2152CUJ-14#PBF equivalent, this ADC supports demanding RF digitization tasks including cellular basestation receivers, software-defined radios, medical ultrasound front-ends, and high-definition video capture where wide dynamic range and low jitter sampling are critical.
Technical Context
The LTC2152CUJ-14#PBF employs a 14-bit pipelined architecture with integrated sample-and-hold, correction logic, and DDR LVDS output drivers. Its 1.25GHz input bandwidth enables direct RF sampling of signals up to Nyquist (125MHz) and robust undersampling of IF/RF bands up to 900MHz with maintained SFDR performance.
It features a programmable serial SPI interface for configuration of clock duty cycle stabilization, LVDS current mode (1.75mA/3.5mA), nap/sleep modes, and output timing alignment. The ENC+/ENC– differential clock inputs accept sine wave, PECL, LVDS, TTL, or CMOS signals, and the internal reference supports ±0.75V or externally scaled ±0.6×VSENSE input ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision measurement systems. |
| Sampling Rate | 250Msps - enables real-time digitization of 125MHz baseband or higher IF signals without aliasing in undersampling architectures. |
| SNR / SFDR | 70dB SNR / 90dB SFDR at 15MHz input - provides >11.3 effective bits and clean spectral purity for signal integrity-critical applications. |
| Input Bandwidth | 1.25GHz full-power bandwidth - supports direct sampling of L-band, S-band, and lower C-band RF signals with minimal amplitude roll-off. |
| Power Consumption | 356mW total at 250Msps - balances high-speed performance with thermal manageability in dense PCB layouts. |
| Digital Interface | DDR LVDS outputs with on-chip 100Ω termination - reduces external component count and improves signal integrity at 500Mbps per lane. |
| Supply Voltage | Single 1.8V analog (VDD) and digital (OVDD) supply - simplifies power delivery and eliminates level-shifting requirements. |
Pinout & Package
40-lead (6mm × 6mm) plastic QFN package with exposed pad (Pin 41 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2) | Analog power supply | 1.8V supply for core ADC circuitry; requires local 0.1µF ceramic bypass to GND. |
| AIN+, AIN– (Pins 4,5) | Differential analog input | Accepts 1.5VP-P differential signal centered at VCM; supports DC-coupled or AC-coupled high-frequency inputs. |
| ENC+, ENC– (Pins 11,12) | Differential encode clock | Edge-triggered sampling control; rising edge on ENC+ initiates conversion; accepts multiple logic families. |
| D0_1+ / D0_1– to D12_13+ / D12_13– (Pins 16–17, 18–19, 22–23, 24–25, 28–29, 31–32, 33–34) | DDR LVDS data outputs | Seven differential pairs carrying 14-bit data multiplexed at double-data rate; each pair transmits two bits per clock cycle. |
| CLKOUT+, CLKOUT– (Pins 26,27) | Data output clock | Synchronizes DDR LVDS data transitions; phase can be adjusted via SPI register for timing alignment. |
| OF+, OF– (Pins 14,15) | Overflow/underflow flag | Differential indicator signaling saturation events; valid during respective half-cycles of CLKOUT+. |
| PAR/SER, CS, SCK, SDI, SDO (Pins 40,39,38,37,36) | SPI configuration interface | Enables serial programming of operating modes; SDO is open-drain requiring external 2kΩ pull-up if used. |
Key Features
| Feature | Design Value |
|---|---|
| Optional clock duty cycle stabilizer | Enables high-performance operation across wide input clock duty cycles (15%–85%), eliminating need for external clock conditioning circuits. |
| Low-power nap and sleep modes | Reduces power to 105mW (nap) or <2mW (sleep) while preserving configuration state - ideal for burst-mode or power-gated systems. |
| Easy-to-drive 1.5VP-P input range | Minimizes drive requirements for preceding amplifiers or baluns, reducing signal chain complexity and distortion contribution. |
| 1.82LSBRMS transition noise | Ensures stable code transitions and low histogram spread - critical for accurate amplitude and phase measurements in coherent systems. |
| Pin-compatible 12-bit variants | Enables design reuse and migration paths (e.g., LTC2152-12) without PCB layout changes when resolution trade-offs are acceptable. |
Applications
| Cellular Basestation Receiver | Software-Defined Radio (SDR) |
|---|---|
|
Use Scenario: Digitizing 70–220MHz IF signals from multi-carrier GSM/LTE/FDD-TDD front-ends with simultaneous channel capture. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth with minimal spurious content to preserve adjacent-channel selectivity. Use Value: 90dB SFDR prevents intermodulation distortion from masking weak adjacent channels; 1.25GHz bandwidth allows flexible IF placement. |
Use Scenario: Reconfigurable RF receiver supporting multiple waveforms (e.g., LTE, WiMAX, military comms) via FPGA-based digital backend. IC Role / Device Role / Timing Role: Front-end digitizer providing real-time 250Msps samples to FPGA for adaptive filtering, demodulation, and protocol parsing. Use Value: SPI configurability enables runtime adjustment of LVDS current, clock stabilization, and power modes to match waveform-specific latency and power budgets. |
| Medical Ultrasound Imaging | High-Speed Test & Measurement |
|
Use Scenario: Beamforming acquisition in portable ultrasound systems digitizing 5–15MHz echo return signals from phased-array transducers. IC Role / Device Role / Timing Role: Channel ADC in multi-channel receive path delivering synchronized, low-noise samples for digital beam synthesis. Use Value: 70dB SNR ensures detection of low-amplitude tissue echoes; 14-bit resolution preserves dynamic range across near/far field imaging depths. |
Use Scenario: Real-time spectrum analysis and signal generation validation in benchtop oscilloscopes and vector signal analyzers. IC Role / Device Role / Timing Role: Core digitizer enabling >100MHz instantaneous bandwidth and fast Fourier transform processing at 250Msps. Use Value: Low 0.15ps RMS aperture jitter minimizes frequency-domain smearing; DDR LVDS interface sustains sustained 3.5Gbps aggregate throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9643BCPZ-250 | 14-bit, 250Msps; JESD204B serial interface instead of DDR LVDS; higher 435mW power; 73.5dB SNR typical. | Better suited for FPGA-centric designs with JESD204B lanes; less compatible with legacy LVDS FPGA I/O banks. | Select AD9643BCPZ-250 when migrating to high-density serial interconnects and FPGA resources support JESD204B decoding. |
| LTC2262CUH-14#PBF | 14-bit, 105Msps; lower speed but superior 73.5dB SNR and 95dB SFDR; same 1.8V supply and QFN-40 package. | Optimized for lower-frequency, ultra-low-noise applications like precision instrumentation or radar pulse compression. | Select LTC2262CUH-14#PBF when system bandwidth requirement is ≤52.5MHz and SNR/SFDR margin is prioritized over speed. |
Compared with AD9643BCPZ-250 and LTC2262CUH-14#PBF, the LTC2152CUJ-14#PBF offers the optimal balance of 250Msps speed, proven LVDS interoperability, and sub-360mW power in a drop-in-compatible footprint-making it ideal for cost-sensitive, high-volume RF digitization where parallel interface simplicity and thermal efficiency are decisive.
Availability
LTC2152CUJ-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, test equipment, and medical imaging systems requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for LTC2152CUJ-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 DSP technologies, serving aerospace, industrial, automotive, and communications markets.
The LTC2152CUJ-14#PBF belongs to Linear's high-speed ADC product line, designed specifically for RF and IF digitization in communications infrastructure and instrumentation where dynamic range, sampling fidelity, and power efficiency are mission-critical.
FAQ
What is the maximum input frequency supported by the LTC2152CUJ-14#PBF?
The LTC2152CUJ-14#PBF has a 1.25GHz full-power bandwidth, meaning it maintains specified dynamic performance (e.g., SNR, SFDR) for input signals up to 1.25GHz. This enables undersampling of RF bands such as 900MHz cellular signals at 250Msps sampling rate, provided the Nyquist zone placement avoids aliasing into the band of interest.
Does the LTC2152CUJ-14#PBF require external reference components?
No-the LTC2152CUJ-14#PBF integrates an internal 1.25V reference (VREF) and common-mode buffer (VCM), both requiring only standard ceramic bypass capacitors (2.2µF for VREF, 0.1µF for VCM). An external reference can be applied via the SENSE pin to scale the input range, but it is not required for basic operation.
How does the DDR LVDS interface of the LTC2152CUJ-14#PBF reduce FPGA I/O resource usage?
The LTC2152CUJ-14#PBF uses seven differential LVDS pairs (D0_1 through D12_13) to transmit all 14 bits in double-data-rate format-each pair carries two bits per clock cycle. This halves the number of required I/O pins versus single-data-rate interfaces, freeing FPGA resources for signal processing logic and easing PCB routing density.
Can the LTC2152CUJ-14#PBF operate with non-ideal clock duty cycles?
Yes-the LTC2152CUJ-14#PBF includes an optional clock duty cycle stabilizer that corrects input clock asymmetry. When enabled, it allows full-spec performance across duty cycles from 15% to 85%, eliminating the need for external clock conditioners in systems with variable or degraded clock sources.
What power savings are achievable using nap or sleep modes on the LTC2152CUJ-14#PBF?
In nap mode, the LTC2152CUJ-14#PBF draws 105mW while maintaining configuration registers and ready-to-resume operation; in sleep mode, it consumes <2mW and retains register state. These modes enable significant energy reduction during idle periods in battery-powered or thermally constrained instruments without sacrificing startup latency.
LTC2152CUJ-14#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 250M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - 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:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 40-QFN (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2152CUJ-14#PBF FAQ
1.How can I place an order for LTC2152CUJ-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2152CUJ-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 LTC2152CUJ-14#PBF reliable?
The price and inventory of LTC2152CUJ-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 LTC2152CUJ-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2152CUJ-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2152CUJ-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2152CUJ-14#PBF?
LTC2152CUJ-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2152CUJ-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 LTC2152CUJ-14#PBF?
For technical support, including LTC2152CUJ-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2152CUJ-14#PBF requirements.
6.How does Aetrix verify that LTC2152CUJ-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2152CUJ-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 LTC2152CUJ-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2152CUJ-14#PBF?
All LTC2152CUJ-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2152CUJ-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 LTC2152CUJ-14#PBF part is unused and in its original packaging.
Return procedure for LTC2152CUJ-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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