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Analog Devices Inc. LTC2141IUP-14#PBF
- Part No.:
- LTC2141IUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2141IUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,464
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Product details
Overview
LTC2141IUP-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 40Msps dual-channel simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range signal digitization in communications infrastructure. It delivers 72.7dB SNR, 90dB SFDR, and ultralow 0.10psRMS jitter at full speed, operating from a single 1.8V supply with CMOS/DDR-CMOS/DDR-LVDS output options. It is deployed in cellular base stations and software-defined radios requiring precise phase-matched channel acquisition.
For engineers reviewing the LTC2141IUP-14#PBF datasheet, LTC2141IUP-14#PBF pinout, LTC2141IUP-14#PBF application, or LTC2141IUP-14#PBF equivalent, key selection criteria include its guaranteed ±1LSB INL over temperature, 750MHz full-power bandwidth, differential encode input support, low 67mW total power consumption, and compatibility with external reference configurations via the SENSE pin.
Technical Context
The LTC2141IUP-14#PBF implements two independent 14-bit ADC cores sharing a common sample-and-hold with 750MHz bandwidth, enabling true simultaneous sampling across channels. Its architecture supports selectable input ranges (1VP-P to 2VP-P) and includes an optional clock duty cycle stabilizer for robust operation with non-50% duty cycle clocks.
Digital interface flexibility is provided through three output modes: full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS - each configurable via SPI or parallel control. The device integrates internal 1.25V reference with ±25ppm/°C drift and supports external reference biasing via the SENSE pin for ±0.5V or ±1V input ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over –40°C to +85°C - ensures monotonicity and full code coverage in industrial environments. |
| Sampling Rate | 40Msps - matches mid-tier SDR and medical imaging data throughput requirements without oversampling penalty. |
| SNR | 72.7dB at 70MHz input - enables detection of weak signals buried in noise for RF receiver front-ends. |
| SFDR | 90dB at 70MHz input - suppresses harmonic distortion critical for multi-carrier cellular base station applications. |
| Total Power | 67mW at 40Msps with CMOS outputs - reduces thermal load and simplifies PCB cooling in dense RF modules. |
| Input Bandwidth | 750MHz full-power - supports direct undersampling of IF signals up to 375MHz (Nyquist zone 2). |
| Jitter | 0.10psRMS (differential encode) - limits aperture uncertainty to <0.01 LSB error at 70MHz input. |
Pinout & Package
Package: 64-lead (9mm × 9mm) plastic QFN with exposed GND pad (Pin 65), rated for –40°C to +85°C operation.
| 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 per group. |
| AIN1+/AIN1– (4, 5) | Differential analog input, Channel 1 | Accepts 1VP-P to 2VP-P differential signal; common-mode biased by VCM1 (Pin 2). |
| ENC+/ENC– (18, 19) | Differential encode clock input | Rising edge on ENC+ initiates conversion; ENC– tied to GND enables single-ended mode. |
| PAR/SER (11) | Programming mode select | Ground = serial SPI interface; VDD = parallel logic control of output mode and duty cycle stabilizer. |
| OVDD (42) | Digital output supply | 1.1V–1.9V programmable rail setting CMOS swing (1.2V–1.8V) or enabling LVDS termination. |
| SENSE (63) | Reference configuration | VDD = ±1V input range with internal ref; GND = ±0.5V range; external 0.625V–1.3V ref also supported. |
| D1_0–D1_13 / D2_0–D2_13 (25–32, 38–58, 48–49, 56–57, etc.) | Parallel digital outputs | Two 14-bit buses (MSB-first) with configurable DDR/SDR timing; LVDS variants use paired differential pins. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Guaranteed inter-channel skew <100ps - preserves phase coherence for beamforming and I/Q demodulation. |
| Configurable output interface | CMOS/DDR-CMOS/DDR-LVDS selectable via PAR/SER and SPI - adapts to FPGA I/O standards without level-shifting. |
| Low-power shutdown modes | 1mW sleep and 10mW nap modes - enables rapid power cycling in battery-powered portable medical devices. |
| Integrated reference system | 1.25V ±25ppm/°C internal ref with external SENSE pin control - eliminates need for discrete reference IC in space-constrained designs. |
| High-precision analog performance | ±1LSB INL and ±0.3LSB DNL (typ) over temperature - reduces calibration overhead in test equipment and instrumentation. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing dual-path IF signals (e.g., 70MHz and 69MHz) in LTE macrocell remote radio heads. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing phase-aligned I/Q data streams for digital downconversion. Use Value: 90dB SFDR prevents adjacent-channel interference; 750MHz bandwidth allows direct IF sampling without analog pre-filtering. |
Use Scenario: Real-time spectrum analysis and adaptive modulation in field-deployable cognitive radio platforms. IC Role / Device Role / Timing Role: High-fidelity digitizer capturing wide instantaneous bandwidth with deterministic latency for FPGA-based DSP pipelines. Use Value: 0.10psRMS jitter ensures stable FFT bin resolution; 40Msps rate supports 20MHz real-time bandwidth per channel. |
| Portable Ultrasound Imaging | Multi-Channel Data Acquisition |
Use Scenario: Beamformed echo signal digitization in handheld ultrasound transducers with dual receive paths. IC Role / Device Role / Timing Role: Low-noise, low-power ADC acquiring synchronized RF echoes from phased-array elements. Use Value: 72.7dB SNR resolves subtle tissue contrast; 67mW total power enables battery operation for >4 hours. |
Use Scenario: High-accuracy sensor fusion in industrial condition monitoring systems with multiple analog inputs. IC Role / Device Role / Timing Role: Precision dual-channel digitizer capturing vibration, temperature, and acoustic signatures with time-aligned timestamps. Use Value: ±1LSB INL ensures traceable measurement linearity; simultaneous sampling eliminates inter-channel timing skew in FFT-based diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BCPZ-40 | 14-bit, 40Msps, single-channel only; requires external clock buffer and dual-device synchronization. | Lacks native simultaneous sampling; adds board-level complexity for dual-path coherence. | Select when channel count flexibility is prioritized over guaranteed inter-channel matching. |
| LTC2261IUP-14#PBF | 14-bit, 40Msps, single-channel; identical package and SPI interface but no second ADC core. | Cannot replace dual-sampling requirement without redesign; suitable only for cost-sensitive single-channel upgrades. | Choose only if system architecture permits channel multiplexing or separate ADCs per path. |
Compared with AD9257BCPZ-40 and LTC2261IUP-14#PBF, the LTC2141IUP-14#PBF uniquely integrates matched dual ADCs in one die - eliminating inter-device skew, reducing PCB area by ~35%, and removing external synchronization circuitry required by alternatives.
Availability
LTC2141IUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, portable medical imaging, and SDR development requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2141IUP-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 semiconductors.
The LTC2141IUP-14#PBF belongs to the LTC214x family of ultra-low-jitter dual ADCs designed specifically for demanding communications and instrumentation applications where channel matching, dynamic range, and power efficiency are critical.
FAQ
What is the guaranteed operating temperature range for the LTC2141IUP-14#PBF?
The LTC2141IUP-14#PBF is specified for continuous operation from –40°C to +85°C (Industrial grade). This range is validated across all key parameters including INL, SNR, and SFDR, making it suitable for outdoor base station equipment and ruggedized portable medical devices where ambient conditions vary widely.
Does the LTC2141IUP-14#PBF support external reference voltage sources?
Yes, the LTC2141IUP-14#PBF supports external reference biasing via the SENSE pin. Applying a voltage between 0.625V and 1.3V to SENSE configures the ADC for external reference operation, enabling custom input ranges and improved system-level accuracy when paired with precision external references like the LT6655.
How does the clock duty cycle stabilizer function in the LTC2141IUP-14#PBF?
The LTC2141IUP-14#PBF's clock duty cycle stabilizer corrects non-50% duty cycle encode clocks in real time, maintaining optimal aperture window symmetry. Enabled via CS pin in parallel programming mode, it ensures consistent sampling fidelity even with asymmetric clocks from PLLs or FPGA outputs - critical for preserving SFDR at full 40Msps rate.
What output interface modes does the LTC2141IUP-14#PBF support, and how are they selected?
The LTC2141IUP-14#PBF supports full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS outputs. Selection is controlled by the PAR/SER pin (serial vs. parallel programming mode) and SPI register settings. LVDS mode requires OVDD = 1.8V and enables on-chip 100Ω termination, reducing external component count.
Can the LTC2141IUP-14#PBF be used in single-ended analog input configurations?
No - the LTC2141IUP-14#PBF is designed exclusively for differential analog inputs (AIN1+/AIN1– and AIN2+/AIN2–). Single-ended drive is not supported; attempting it degrades CMRR, increases distortion, and voids AC performance guarantees. Input common-mode must be biased using VCM1/VCM2 outputs or external networks referenced to VDD/2.
LTC2141IUP-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):
- 40M
- 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:
- -
LTC2141IUP-14#PBF FAQ
1.How can I place an order for LTC2141IUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2141IUP-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 LTC2141IUP-14#PBF reliable?
The price and inventory of LTC2141IUP-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 LTC2141IUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2141IUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2141IUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2141IUP-14#PBF?
LTC2141IUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2141IUP-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 LTC2141IUP-14#PBF?
For technical support, including LTC2141IUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2141IUP-14#PBF requirements.
6.How does Aetrix verify that LTC2141IUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2141IUP-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 LTC2141IUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2141IUP-14#PBF?
All LTC2141IUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2141IUP-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 LTC2141IUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2141IUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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