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Analog Devices Inc. LTC2142IUP-14#PBF
- Part No.:
- LTC2142IUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2142IUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,706
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Product details
Overview
LTC2142IUP-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for high-frequency communications signal digitization. It delivers 73.2dB SNR and 90dB SFDR at 65Msps, operates from a single 1.8V supply, supports CMOS/DDR CMOS/DDR LVDS outputs, and features 750MHz full-power bandwidth - enabling direct IF sampling in cellular base stations and software-defined radios.
For engineers reviewing the LTC2142IUP-14#PBF datasheet, LTC2142IUP-14#PBF pinout, LTC2142IUP-14#PBF application, or LTC2142IUP-14#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed power and timing specs, real-world application mappings, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The LTC2142IUP-14#PBF implements a dual 14-bit SAR-based ADC core with independent sample-and-hold circuits per channel, enabling true simultaneous sampling critical for phase-coherent I/Q demodulation. Its ultralow 0.08psRMS aperture jitter supports undersampling of RF/IF signals up to 140MHz while maintaining 73.2dB SNR.
Digital interface flexibility includes full-rate CMOS, DDR CMOS, or DDR LVDS output modes, with separate OVDD supply (1.1–1.9V) allowing output swing scaling. Configuration is handled via SPI port (CS/SCK/SDI/SDO) or parallel mode (PAR/SER-selectable), supporting clock duty cycle stabilization and optional data randomization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full dynamic range utilization in precision measurement. |
| Sampling Rate | 65Msps maximum - enables real-time digitization of wideband IF signals up to 32.5MHz Nyquist bandwidth. |
| SNR / SFDR | 73.2dB SNR and 90dB SFDR at 70MHz input - ensures high-fidelity signal capture for demanding comms standards like LTE and 5G NR. |
| Power Consumption | 95mW total at 65Msps (48mW per channel) - supports portable and thermally constrained SDR platforms. |
| Input Bandwidth | 750MHz full-power bandwidth - allows direct sampling of VHF/UHF bands without external amplification or filtering. |
| Analog Supply | Single 1.8V (±0.1V) VDD - simplifies power architecture and reduces BOM count versus multi-rail ADCs. |
| Operating Temp | –40°C to +85°C industrial grade - qualified for deployment in outdoor base station cabinets and field-deployable medical imaging systems. |
Pinout & Package
64-pin (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 (1, 16, 17, 64) | Analog power supply | 1.7–1.9V supply for ADC core and reference; requires local 0.1μF ceramic bypass per group. |
| AIN1+/AIN1– (4, 5) | Channel 1 differential analog input | Accepts 1–2VP-P differential signal; common-mode biased by VCM1 (Pin 2). |
| ENC+/ENC– (18, 19) | Differential encode clock input | Starts conversion on rising/falling edge; supports single-ended (ENC– = GND) or differential drive (LVDS/PECL/TTL). |
| PAR/SER (11) | Programming mode select | Ground = serial SPI mode; VDD = parallel control mode - determines function of CS/SCK/SDI/SDO pins. |
| D1_0–D1_13 / D2_0–D2_13 (25–32, 45–58, 38–33, 50–49) | Parallel digital data outputs | 14-bit per channel; pin mapping varies by output mode (CMOS/LVDS); DDR LVDS uses paired ± pins (e.g., D1_0+, D1_0–). |
| OVDD (42) | Digital output supply | 1.1–1.9V supply for output drivers; sets CMOS swing (1.2–1.8V) or enables LVDS termination (100Ω on-chip). |
| SENSE (63) | Reference configuration | Connect to VDD → ±1V input range; connect to GND → ±0.5V range; external reference 0.625–1.3V supported. |
| VREF (62) | Internal reference output | 1.25V ±25mV buffered reference; requires 2.2μF ceramic bypass for stability in precision applications. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Eliminates inter-channel skew for coherent I/Q processing in zero-IF receivers and phased-array systems. |
| 0.08psRMS aperture jitter | Enables clean undersampling of 70MHz IF signals with <0.1dB SNR degradation - critical for spectral purity in SDR. |
| Configurable output interface | Hardware-selectable CMOS/DDR CMOS/DDR LVDS avoids FPGA I/O voltage compatibility issues and reduces board-level termination complexity. |
| Integrated clock duty cycle stabilizer | Compensates for >30%–70% input clock duty cycle variation - relaxes requirements on external clock synthesizers. |
| SPI-configurable low-power modes | 1mW sleep and 10mW nap modes enable rapid wake-up during burst-mode operation in battery-powered test equipment. |
| On-chip 100Ω LVDS termination | Removes need for external 100Ω differential resistors - saves PCB area and improves signal integrity at 65Msps DDR rates. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing dual-path IF signals (I/Q) from wideband RF front-ends in macrocell and small-cell BTS. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing phase-matched 14-bit conversion at 65Msps for real-time digital predistortion and MIMO processing. Use Value: 73.2dB SNR and 90dB SFDR preserve EVM performance across LTE/5G carriers; 750MHz bandwidth supports direct sampling up to 3G Hz. |
Use Scenario: High-dynamic-range signal acquisition in field-programmable SDR transceivers used for spectrum monitoring and cognitive radio. IC Role / Device Role / Timing Role: Dual-channel ADC serving as the primary digitizer for reconfigurable RF paths, synchronized via shared ENC+/- inputs. Use Value: Low 95mW power enables compact, fanless designs; SPI programmability allows runtime mode switching between narrowband/high-SNR and wideband modes. |
| Portable Medical Imaging | Multi-Channel Data Acquisition |
Use Scenario: Ultrasound beamforming systems requiring precise time-of-flight measurements across multiple receive channels. IC Role / Device Role / Timing Role: Simultaneous-sampling ADC capturing echo returns from two transducer elements with sub-picosecond timing alignment. Use Value: 0.08psRMS jitter enables <1mm spatial resolution; shutdown mode reduces power during idle scan periods. |
Use Scenario: High-channel-count test instrumentation acquiring synchronized analog waveforms from sensors in industrial automation and structural health monitoring. IC Role / Device Role / Timing Role: Dual ADC used in interleaved or parallel configurations to scale channel count while maintaining timing coherence. Use Value: ±1LSB INL and ±0.3LSB DNL ensure accurate amplitude fidelity across 16+ channels; 64-QFN footprint supports dense PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9246BCPZ-65 | 65Msps, 14-bit, single-channel; requires external clock distribution and synchronization circuitry for dual-channel use. | Lacks native simultaneous sampling - unsuitable for phase-critical I/Q or beamforming where channel matching is essential. | Select only if system already implements precise clock skew management and channel alignment in FPGA logic. |
| LTC2262IUH-14#PBF | 65Msps, 14-bit, dual-channel with identical QFN-64 package and SPI interface, but lower SNR (70.2dB) and higher power (125mW). | Same pinout and register map; drop-in replacement possible but trades 3dB SNR for higher dynamic range headroom in some front-ends. | Prefer when legacy layout reuse is mandatory and 3dB SNR margin is acceptable for target application SNR budget. |
Compared with AD9246BCPZ-65 and LTC2262IUH-14#PBF, the LTC2142IUP-14#PBF uniquely integrates simultaneous sampling, 0.08psRMS jitter, and configurable DDR LVDS outputs in a single 64-pin QFN - eliminating external synchronization components and reducing system-level noise floor by 3dB.
Availability
LTC2142IUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, portable medical ultrasound, multi-channel test equipment, and nondestructive testing requiring stable component supply across extended temperature ranges.
Supply support for LTC2142IUP-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 LTC2142IUP-14#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, ultra-low jitter, and flexible digital interfacing.
FAQ
What is the maximum sampling rate supported by the LTC2142IUP-14#PBF?
The LTC2142IUP-14#PBF supports a maximum sampling rate of 65Msps, as specified in its part number suffix "-65" and confirmed in the Absolute Maximum Ratings and Dynamic Accuracy sections of the official datasheet. This rate applies to both channels simultaneously, with guaranteed AC performance including 73.2dB SNR and 90dB SFDR at 70MHz input frequency.
Does the LTC2142IUP-14#PBF support differential analog input?
Yes, the LTC2142IUP-14#PBF supports fully differential analog inputs on both channels (AIN1+/AIN1– and AIN2+/AIN2–), with a selectable input range of 1VP-P to 2VP-P. The device includes dedicated VCM1 and VCM2 pins to bias the common-mode voltage at VDD/2, and achieves 80dB common-mode rejection ratio (CMRR) across its operating bandwidth.
Can the LTC2142IUP-14#PBF operate with a 1.2V digital output supply?
Yes, the LTC2142IUP-14#PBF supports OVDD from 1.1V to 1.9V, including 1.2V. When OVDD = 1.2V in CMOS output mode, the VOH is guaranteed at 1.185V and VOL at 0.010V (IO = ±500μA), enabling direct interfacing with 1.2V FPGA I/O banks without level-shifting circuitry.
What is the purpose of the SENSE pin on the LTC2142IUP-14#PBF?
The SENSE pin on the LTC2142IUP-14#PBF configures the internal reference and input range: connecting SENSE to VDD selects ±1V input range with internal 1.25V reference; connecting to GND selects ±0.5V range. An external reference between 0.625V and 1.3V can also be applied to SENSE for custom scaling, with corresponding full-scale adjustment.
How does the LTC2142IUP-14#PBF handle power management in low-duty-cycle systems?
The LTC2142IUP-14#PBF provides two low-power states: Nap mode consumes 10mW and retains register settings, while Sleep mode draws just 1mW and requires SPI reinitialization on wake-up. Both modes are controlled via the serial interface, enabling rapid entry/exit during burst-mode acquisition in portable test equipment and battery-powered SDR platforms.
LTC2142IUP-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):
- 65M
- 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:
- -
LTC2142IUP-14#PBF FAQ
1.How can I place an order for LTC2142IUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2142IUP-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 LTC2142IUP-14#PBF reliable?
The price and inventory of LTC2142IUP-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 LTC2142IUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2142IUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2142IUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2142IUP-14#PBF?
LTC2142IUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2142IUP-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 LTC2142IUP-14#PBF?
For technical support, including LTC2142IUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2142IUP-14#PBF requirements.
6.How does Aetrix verify that LTC2142IUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2142IUP-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 LTC2142IUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2142IUP-14#PBF?
All LTC2142IUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2142IUP-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 LTC2142IUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2142IUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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