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Analog Devices Inc. LTC2158IUP-14#PBF
- Part No.:
- LTC2158IUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2158IUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,682
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Product details
Overview
LTC2158IUP-14#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 14-bit, 310Msps analog-to-digital converter optimized for high-frequency undersampling in communications infrastructure. It delivers 68.8dBFS SNR and 88dB SFDR at 70MHz input, operates from a single 1.8V supply, and features DDR LVDS outputs with 1.25GHz full-power bandwidth - enabling direct digitization of cellular, SDR, and medical imaging signals.
For engineers reviewing the LTC2158IUP-14#PBF datasheet, LTC2158IUP-14#PBF pinout, LTC2158IUP-14#PBF application, or LTC2158IUP-14#PBF equivalent, key selection criteria include simultaneous sampling accuracy, low-latency 6-cycle pipeline, programmable LVDS output current, clock duty cycle stabilization, and −40°C to +85°C industrial temperature rating.
Technical Context
The LTC2158IUP-14#PBF employs a pipelined ADC architecture with integrated sample-and-hold (S/H) and correction logic per channel, supporting true simultaneous sampling across two 14-bit paths. Its 1.25GHz input bandwidth enables RF undersampling up to 900MHz while maintaining >67dBFS SNR.
Digital interface uses DDR LVDS with seven differential pairs per channel (DA0_1+/- through DA12_13+/- and DB0_1+/- through DB12_13+/-), plus dedicated CLKOUT+/- and OF+/- outputs. Configuration is handled via SPI port (CS/SCK/SDI/SDO) or parallel mode using PAR/SER, CS, and SCK pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in demanding measurement systems. |
| Sampling Rate | Up to 310Msps - supports wide instantaneous bandwidth capture for spectrum analysis and real-time signal processing. |
| SNR @ 70MHz | 68.8dBFS - enables high-fidelity digitization of weak signals embedded in noise, critical for base station receiver sensitivity. |
| SFDR @ 70MHz | 88dB - suppresses spurious harmonics and intermodulation products, essential for multi-carrier cellular and SDR applications. |
| Input Bandwidth | 1.25GHz full-power - allows direct RF sampling of L-band and S-band frequencies without external downconversion. |
| Power Consumption | 724mW total at 310Msps - balances performance and thermal management in dense PCB layouts. |
| Pipeline Latency | 6 clock cycles - ensures deterministic timing for closed-loop control and FPGA-based real-time processing pipelines. |
Pinout & Package
64-lead (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2,15,16,17,64) | Analog power supply | 1.8V ±0.06V analog core supply; each group requires local 0.1µF ceramic bypass to GND. |
| AINA+/AINA−, AINB+/AINB− | Differential analog inputs | Simultaneously sampled channels A and B; require 1.32VP-P swing centered at VCM ≈ 0.435×VDD. |
| ENC+/ENC− | Differential encode clock inputs | Trigger conversion on rising/falling edges; accept sine, PECL, LVDS, TTL, or CMOS; support optional duty cycle stabilizer. |
| DA0_1+/- to DA12_13+/-, DB0_1+/- to DB12_13+/- | DDR LVDS data outputs | Two bits per pair (even/odd multiplexed by CLKOUT+ phase); support 1.75–4.5mA programmable output current. |
| CLKOUT+/CLKOUT− | Data output clock | DDR-aligned clock with optional 0°/45°/90°/135° phase shift; used to latch DDR data at receiver. |
| OF+/OF− | Overflow/underflow flag | Double-data-rate status bit indicating saturation on either channel A or B, time-aligned with corresponding data. |
| PAR/SER, CS, SCK, SDI, SDO | Configuration interface | Select serial (SPI) or parallel programming mode; enable sleep/nap modes, clock stabilizer, LVDS termination, and output current. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Eliminates inter-channel skew for coherent I/Q demodulation and beamforming in phased-array systems. |
| Programmable LVDS output current (1.75–4.5mA) | Optimizes signal integrity and power trade-off across varying trace lengths and receiver input sensitivities. |
| Optional internal 100Ω LVDS termination | Reduces reflections and improves eye diagram quality without requiring external resistors at receiver end. |
| Integrated clock duty cycle stabilizer | Enables robust operation with 30–70% input clock duty cycle, relaxing requirements on upstream clock generators. |
| Low-power sleep and nap modes | Reduces power to <5mW (sleep) or 202mW (nap) during idle periods - extends uptime in battery-assisted test equipment. |
Applications
| Cellular Basestations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing multiple RF carriers in LTE/5G macrocell receivers with wide instantaneous bandwidth. IC Role / Device Role / Timing Role: Dual-channel ADC performing simultaneous I/Q sampling at 310Msps with 68.8dBFS SNR and 88dB SFDR. Use Value: Enables direct RF sampling up to 900MHz, eliminating analog downconversion stages and reducing component count and phase mismatch. | Use Scenario: Reconfigurable wideband front-end for military comms, spectrum monitoring, and cognitive radio platforms. IC Role / Device Role / Timing Role: High-speed digitizer providing flexible bandwidth and resolution via FPGA-controlled SPI configuration. Use Value: Programmable LVDS current, clock stabilizer, and phase-shiftable CLKOUT allow adaptation to diverse FPGA I/O standards and layout constraints. |
| Medical Imaging | Testing and Measurement Instruments |
Use Scenario: Ultrasound beamformer digitizing echo return signals from phased-array transducers. IC Role / Device Role / Timing Role: Low-latency (6-cycle) dual ADC capturing time-of-flight data with precise channel-to-channel alignment. Use Value: Simultaneous sampling and <0.55ns data-to-clock skew ensure accurate spatial reconstruction and Doppler velocity estimation. | Use Scenario: High-resolution oscilloscopes and vector signal analyzers requiring fast acquisition and low distortion. IC Role / Device Role / Timing Role: Core digitizer delivering 14-bit resolution, 68.4dBFS SNR at 140MHz, and 98dB SFDR beyond 4th harmonic. Use Value: 1.25GHz full-power bandwidth supports single-shot capture of transient events up to S-band without aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9680BCPZ-500 | 14-bit, 500Msps, JESD204B serial interface, higher power (1.5W), 72dBFS SNR @ 70MHz | Targets high-throughput systems needing FPGA-optimized serial link instead of parallel LVDS | Choose when system-level bandwidth exceeds 310Msps or JESD204B simplifies routing and reduces pin count. |
| LTC2268IUP-14#PBF | 14-bit, 125Msps, same QFN-64 package, lower power (350mW), 70dBFS SNR @ 70MHz, no clock stabilizer | Designed for cost-sensitive, lower-sample-rate instrumentation where latency and SFDR are less critical | Choose when 125Msps suffices and thermal budget is constrained; not drop-in due to speed and feature differences. |
Compared with AD9680BCPZ-500 and LTC2268IUP-14#PBF, the LTC2158IUP-14#PBF uniquely balances 310Msps speed, 68.8dBFS SNR, DDR LVDS simplicity, and industrial temperature range in a single 1.8V supply - making it optimal for space-constrained, thermally sensitive communications and test equipment.
Availability
LTC2158IUP-14#PBF is available at Aetrix Electronics and suitable for cellular basestations, software defined radios, and high-definition video digitization requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2158IUP-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 acquired Linear Technology in 2017 and maintains its high-performance analog and mixed-signal product lines with rigorous reliability and specification consistency.
The LTC2158IUP-14#PBF belongs to Linear's ultra-high-speed ADC family, designed specifically for wideband communications, instrumentation, and medical imaging systems demanding simultaneous sampling, low jitter, and robust RF performance.
FAQ
What is the operating temperature range of the LTC2158IUP-14#PBF?
The LTC2158IUP-14#PBF is rated for industrial operation from −40°C to +85°C, as confirmed by its "I" grade designation and Absolute Maximum Ratings table. This range supports deployment in outdoor basestations, field-deployable test gear, and industrial imaging systems where ambient conditions exceed commercial limits.
Does the LTC2158IUP-14#PBF support internal voltage reference operation?
Yes, the LTC2158IUP-14#PBF supports internal reference operation: connecting the SENSE pin to VDD configures the device for a 1.32VP-P input range with a nominal 1.25V internal reference. The VREF pin outputs this reference and must be bypassed with a 2.2µF ceramic capacitor to ground.
How many LVDS output pairs does the LTC2158IUP-14#PBF provide per channel?
The LTC2158IUP-14#PBF provides seven DDR LVDS output pairs per channel: DA0_1+/- through DA12_13+/- for Channel A, and DB0_1+/- through DB12_13+/- for Channel B. Each pair carries two multiplexed data bits synchronized to CLKOUT+ transitions.
Can the LTC2158IUP-14#PBF operate with non-50% duty cycle encode clocks?
Yes - the LTC2158IUP-14#PBF includes an optional clock duty cycle stabilizer that accepts input clocks with 30–70% duty cycle and generates an internal 50% clock for sampling. This feature is enabled via SPI register A2 or the CS pin in parallel mode.
What is the pipeline latency of the LTC2158IUP-14#PBF?
The LTC2158IUP-14#PBF has a fixed pipeline latency of six clock cycles from encode edge to valid output data, as specified in the Timing Characteristics table. This deterministic delay simplifies timing closure in FPGA-based digital signal processing chains.
LTC2158IUP-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):
- 310M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - 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:
- 1.74V ~ 1.9V
- Voltage - Supply, Digital:
- 1.74V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2158IUP-14#PBF FAQ
1.How can I place an order for LTC2158IUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2158IUP-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 LTC2158IUP-14#PBF reliable?
The price and inventory of LTC2158IUP-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 LTC2158IUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2158IUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2158IUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2158IUP-14#PBF?
LTC2158IUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2158IUP-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 LTC2158IUP-14#PBF?
For technical support, including LTC2158IUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2158IUP-14#PBF requirements.
6.How does Aetrix verify that LTC2158IUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2158IUP-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 LTC2158IUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2158IUP-14#PBF?
All LTC2158IUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2158IUP-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 LTC2158IUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2158IUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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