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Analog Devices Inc. LTC2158CUP-14#PBF
- Part No.:
- LTC2158CUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2158CUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,561
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Product details
Overview
LTC2158CUP-14#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 14-bit, 310Msps analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in communications infrastructure. It delivers 68.8dBFS SNR and 88dB SFDR at 70MHz input, operates from a single 1.8V supply, features DDR LVDS outputs, and supports 1.25GHz full-power bandwidth - enabling undersampling of RF signals in cellular basestations and software-defined radios.
For engineers reviewing the LTC2158CUP-14#PBF datasheet, LTC2158CUP-14#PBF pinout, LTC2158CUP-14#PBF application, or LTC2158CUP-14#PBF equivalent, key selection considerations include simultaneous sampling accuracy, low-latency 6-cycle pipeline, programmable LVDS output current (1.75–4.5mA), clock duty cycle stabilization, and SPI-configurable sleep/nap modes for power-sensitive SDR and test instrumentation designs.
Technical Context
The LTC2158CUP-14#PBF implements a pipelined 14-bit ADC architecture with shared sample-and-hold for true simultaneous sampling across two channels. Its 1.25GHz input bandwidth and 0.15psRMS aperture jitter support direct RF sampling up to 900MHz, while internal correction logic ensures ±1.2LSB INL and no missing codes over temperature.
Digital interface uses DDR LVDS with seven 2-bit multiplexed output pairs per channel (DA0_1+/- to DA12_13+/- and DB0_1+/- to DB12_13+/-), plus dedicated OF+/- overflow and CLKOUT+/- clock outputs. Configuration is handled via a 3-wire SPI port supporting register readback, phase-shifted CLKOUT, and programmable LVDS drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over 0°C to 70°C operating range |
| Sampling Rate | Up to 310Msps - enables real-time digitization of wideband IF/RF signals without decimation |
| SNR @ 70MHz | 68.8dBFS - determines minimum detectable signal level in high-interference environments |
| SFDR @ 70MHz | 88dB - defines spurious-free dynamic range for multi-tone communication systems |
| Full-Power BW | 1.25GHz - supports undersampling of L-band and S-band RF signals |
| Power Consumption | 724mW total at 310Msps - balances performance and thermal management in dense PCB layouts |
| Pipeline Latency | 6 clock cycles - enables deterministic timing alignment in FPGA-based digital downconverters |
Pinout & Package
Package: 64-lead (9mm × 9mm) plastic QFN with exposed thermal pad (Pin 65 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2,15,16,17,64) | Analog power supply | 1.8V supply for ADC core; requires local 0.1µF ceramic bypassing per group |
| AINA+/AINA– (Pins 4,5) | Differential analog input A | Accepts 1.32VP-P swing centered on VCM (0.435•VDD); requires 180° phase match |
| ENC+/ENC– (Pins 19,20) | Differential encode clock input | Starts conversion on rising/falling edges; supports sine, LVDS, PECL, TTL, CMOS |
| DA0_1+/DA0_1– to DA12_13+/DA12_13– (Pins 42–43,44–45,…,56–57) | Channel A DDR LVDS data outputs | Seven differential pairs carrying 14-bit A-channel data at double data rate |
| CLKOUT+/CLKOUT– (Pins 40,41) | Data output clock | DDR clock synchronized to data; supports 0°/45°/90°/135° phase shift via SPI |
| PAR/SER (Pin 63) | Programming mode select | Ground = serial SPI mode; VDD = parallel control of CS/SCK/SDI for basic functions |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Shared encode circuit eliminates inter-channel skew - critical for I/Q demodulation and beamforming |
| Programmable LVDS output current | Configurable 1.75–4.5mA per pair via SPI register A3 - optimizes signal integrity and power for different receiver loads |
| Optional clock duty cycle stabilizer | Enables high-performance operation with 30–70% external clock duty cycle - relaxes clock source requirements |
| Low-power sleep and nap modes | Power drops to <5mW (sleep) or 202mW (nap) - extends runtime in portable test equipment |
| Internal 1.25V reference with external option | SENSE pin selects internal reference or accepts 1.25V external source - simplifies system reference architecture |
Applications
| Cellular Basestation Receiver | Software-Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing 70MHz–300MHz LTE/WCDMA IF signals in macrocell remote radio heads. IC Role / Device Role / Timing Role: Dual-channel ADC performing simultaneous I/Q sampling with 6-cycle deterministic latency for real-time DDC processing. Use Value: 88dB SFDR prevents adjacent-channel interference masking weak signals; 1.25GHz BW enables direct IF sampling without analog downconversion stages. | Use Scenario: Wideband spectrum monitoring and agile waveform reception in military/commercial SDR platforms. IC Role / Device Role / Timing Role: High-speed digitizer capturing 100+ MHz instantaneous bandwidth with configurable LVDS drive for FPGA interface compatibility. Use Value: Programmable 45°/90° CLKOUT phase shift aligns data setup/hold timing across multiple FPGAs; SPI configuration enables rapid re-tuning. |
| Medical Ultrasound Beamformer | High-Speed Test Instrumentation |
Use Scenario: Receiving echo signals from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: Low-noise, low-latency ADC providing time-aligned samples across 128+ receive channels via daisy-chained LVDS links. Use Value: 68.8dBFS SNR preserves weak echo fidelity; simultaneous sampling eliminates beam-steering errors from channel-to-channel timing mismatch. | Use Scenario: Real-time signal analysis in 10GS/s oscilloscopes and vector signal analyzers requiring >1GHz analog bandwidth. IC Role / Device Role / Timing Role: Front-end digitizer capturing transient RF events with sub-picosecond jitter and deterministic 6-cycle latency. Use Value: 0.15psRMS aperture jitter ensures accurate time-domain reconstruction; DDR LVDS reduces pin count vs. parallel CMOS interfaces. |
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), 0.5mm pitch BGA | Targets JESD204B-based FPGA platforms; lacks LVDS simplicity and lower power | Choose when system-level bandwidth exceeds 310Msps and FPGA supports JESD204B lane aggregation |
| LTC2268IUP-14#PBF | 14-bit, 125Msps, same QFN package, lower power (340mW), no clock duty cycle stabilizer | Designed for lower-sample-rate applications where 310Msps is unnecessary | Choose for cost-optimized, lower-power IF digitization where full 310Msps capability is unused |
Compared with AD9680BCPZ-500 and LTC2268IUP-14#PBF, the LTC2158CUP-14#PBF uniquely balances 310Msps speed, DDR LVDS simplicity, sub-1W power, and clock flexibility - making it optimal for space-constrained, thermally sensitive SDR and test equipment where JESD204B complexity is unwarranted.
Availability
LTC2158CUP-14#PBF is available at Aetrix Electronics and suitable for cellular basestations, software-defined radios, and high-definition medical imaging systems requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for LTC2158CUP-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving communications, industrial, automotive, and healthcare markets.
The LTC2158CUP-14#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding RF/IF digitization in wireless infrastructure and instrumentation where simultaneous sampling, low jitter, and flexible digital interfacing are essential.
FAQ
What is the operating temperature range for the LTC2158CUP-14#PBF?
The LTC2158CUP-14#PBF is rated for commercial temperature operation from 0°C to 70°C. This grade is specified in the ordering part number ('C' suffix) and validated across the full range for parameters including INL (±1.2LSB typ), SNR (68.8dBFS), and power consumption (724mW typ at 310Msps). The 'I' grade variant (LTC2158IUP-14#PBF) extends to –40°C to 85°C.
Does the LTC2158CUP-14#PBF support single-ended analog inputs?
No, the LTC2158CUP-14#PBF requires fully differential analog input drive on both AINA+/AINA– and AINB+/AINB–. The internal sample-and-hold circuit is designed for differential CMOS signaling with common-mode bias set by the VCM pin (nominally 0.435•VDD). Single-ended drive will cause severe distortion and degraded SFDR; transformer or differential amplifier front-ends are mandatory.
How is the clock duty cycle stabilizer enabled on the LTC2158CUP-14#PBF?
The clock duty cycle stabilizer on the LTC2158CUP-14#PBF is enabled either via SPI register A2 (bit D0 = 1) or by asserting CS high in parallel programming mode (PAR/SER = VDD). Once enabled, it accepts external encode clocks with 30–70% duty cycle and generates an internal 50% clock for optimal ADC performance - eliminating need for external duty cycle correction circuits.
What LVDS termination is required for the LTC2158CUP-14#PBF digital outputs?
The LTC2158CUP-14#PBF requires a 100Ω differential termination resistor for each LVDS output pair (e.g., DA0_1+/DA0_1–, DB12_13+/DB12_13–, CLKOUT+/CLKOUT–). This resistor must be placed as close as possible to the receiving device. An optional internal 100Ω termination can be enabled via SPI register A3, which doubles the output current to maintain voltage swing when active.
Can the LTC2158CUP-14#PBF operate with an external voltage reference?
Yes, the LTC2158CUP-14#PBF supports external reference operation: apply a precise 1.250V ±10mV reference to the SENSE pin (Pin 7) to achieve the same 1.32VP-P input range as with the internal reference. The internal reference (1.250V ±25mV) is enabled by connecting SENSE to VDD. External reference improves gain accuracy and temperature drift performance in metrology-grade applications.
LTC2158CUP-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:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2158CUP-14#PBF FAQ
1.How can I place an order for LTC2158CUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2158CUP-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 LTC2158CUP-14#PBF reliable?
The price and inventory of LTC2158CUP-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 LTC2158CUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2158CUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2158CUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2158CUP-14#PBF?
LTC2158CUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2158CUP-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 LTC2158CUP-14#PBF?
For technical support, including LTC2158CUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2158CUP-14#PBF requirements.
6.How does Aetrix verify that LTC2158CUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2158CUP-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 LTC2158CUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2158CUP-14#PBF?
All LTC2158CUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2158CUP-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 LTC2158CUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2158CUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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