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Analog Devices Inc. LTC2145IUP-14#TRPBF
- Part No.:
- LTC2145IUP-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2145IUP-14#TRPBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
LTC2145IUP-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 125Msps dual-channel simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range signal digitization in communications infrastructure. It delivers 73.1dB SNR, 90dB SFDR, and ultralow 0.08psRMS 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 IF sampling.
For engineers reviewing the LTC2145IUP-14#TRPBF datasheet, LTC2145IUP-14#TRPBF pinout, LTC2145IUP-14#TRPBF application, or LTC2145IUP-14#TRPBF equivalent, key selection criteria include its 125Msps dual-channel sampling rate, –40°C to +85°C industrial temperature grade, 750MHz full-power bandwidth, and configurable input range (1VP-P to 2VP-P) with internal/external reference support.
Technical Context
The LTC2145IUP-14#TRPBF implements two independent 14-bit ADC cores with synchronized sample-and-hold circuits, enabling true simultaneous sampling across channels. Its architecture supports differential or single-ended encode inputs (ENC+/ENC–), optional clock duty cycle stabilization, and data output randomization to reduce spectral artifacts.
Digital interface flexibility includes serial SPI configuration (via CS/SCK/SDI/SDO), programmable output modes (full-rate CMOS, DDR CMOS, DDR LVDS), and selectable parallel/serial programming via PAR/SER pin. Internal reference (1.25V ±25ppm/°C) and external reference support (0.625V–1.3V on SENSE) enable precise gain calibration and input range scaling.
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 | 125Msps - enables direct undersampling of IF signals up to 70MHz while maintaining >73dB SNR. |
| SNR / SFDR | 73.1dB SNR and 90dB SFDR at 70MHz input - meets stringent dynamic range requirements for LTE/5G receiver front-ends. |
| Input Bandwidth | 750MHz full-power bandwidth - supports wideband RF/IF signal acquisition without external amplification. |
| Power Consumption | 189mW total at 125Msps (CMOS mode) - achieves high performance with low thermal load in dense PCB layouts. |
| Supply Voltage | Single 1.8V analog (VDD) and digital (OVDD) supply - simplifies power delivery and reduces BOM count versus split-supply ADCs. |
| Jitter Performance | 0.08psRMS aperture jitter - minimizes noise floor degradation when sampling high-frequency carriers. |
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 (Pins 1,16,17,64) | Analog power supply | 1.7V–1.9V supply for ADC core and reference circuitry; requires local 0.1μF ceramic bypassing. |
| AIN1+/AIN1– (Pins 4,5) | Channel 1 differential analog input | Accepts 1VP-P to 2VP-P differential signal; common-mode biased by VCM1 (Pin 2). |
| ENC+/ENC– (Pins 18,19) | Differential encode clock input | Triggers conversion on rising/falling edges; supports single-ended mode (ENC– = GND) or differential drive. |
| PAR/SER (Pin 11) | Programming mode select | Ground = serial SPI interface; VDD = parallel logic control - determines function of CS/SCK/SDI/SDO pins. |
| D1_0–D1_13 / D2_0–D2_13 (Pins 45–48,50–58,25–32,34–38) | Dual-channel digital data outputs | Configurable as full-rate CMOS, DDR CMOS, or DDR LVDS; OVDD (Pin 42) sets output swing (1.2V–1.8V for CMOS). |
| SENSE (Pin 63) | Reference and input range programming | Selects ±0.5V (GND), ±1V (VDD), or ±0.8×VSENSE (external 0.625V–1.3V) input range - enables flexible signal scaling. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Eliminates inter-channel skew for coherent I/Q demodulation and beamforming applications. |
| Configurable output interface | Hardware-selectable CMOS/DDR CMOS/DDR LVDS reduces FPGA I/O resource usage and EMI in high-speed designs. |
| Integrated clock duty cycle stabilizer | Enables robust operation with non-50% duty cycle clocks - critical for PLL-derived sampling clocks in SDR platforms. |
| Low-power sleep/nap modes | 1mW sleep and 16mW nap power states allow rapid wake-up during burst-mode operation in portable medical or test equipment. |
| Internal 1.25V reference with ±25ppm/°C drift | Provides stable gain calibration without external reference ICs - reduces component count and layout area. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing dual-path IF signals (e.g., 70MHz LTE carrier) in macrocell remote radio heads. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing time-aligned I/Q data streams to FPGA-based digital downconverters. Use Value: 73.1dB SNR and 90dB SFDR preserve modulation accuracy (EVM < 2.5%) for 256-QAM waveforms under multi-tone interference. | Use Scenario: Wideband spectrum sensing and real-time signal analysis in field-deployable cognitive radio units. IC Role / Device Role / Timing Role: High-bandwidth ADC front-end capturing 125MHz instantaneous bandwidth with deterministic latency. Use Value: 750MHz full-power bandwidth and 0.08psRMS jitter enable clean undersampling of 140MHz signals without aliasing or phase distortion. |
| Portable Ultrasound Imaging | Multichannel Data Acquisition System |
Use Scenario: Beamformed RF echo digitization in handheld ultrasound probes with battery-powered operation. IC Role / Device Role / Timing Role: Low-power dual ADC acquiring channel-paired echo returns for real-time synthetic aperture processing. Use Value: 189mW total power at 125Msps and shutdown mode (<1mW) extend battery life while maintaining diagnostic image resolution. | Use Scenario: High-fidelity vibration monitoring across 16+ sensor channels in industrial predictive maintenance gateways. IC Role / Device Role / Timing Role: Precision ADC subsystem synchronizing multiple LTC2145IUP-14#TRPBF devices via shared ENC clock for phase-coherent sampling. Use Value: ±1LSB INL and ±0.3LSB DNL ensure accurate amplitude tracking of sub-millivolt mechanical resonance signatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9233BCPZ-125 | 12-bit, 125Msps; lower resolution but higher SFDR (92dB); 1.8V-only supply; no internal reference. | Better spurious performance for narrowband IF sampling; lacks simultaneous dual-channel sync and flexible input range. | Choose AD9233BCPZ-125 when SFDR >90dB is prioritized over DC accuracy and dual-channel coherence. |
| ADS52J90IRGCT | 16-bit, 100Msps; JESD204B serial interface; 3.3V/1.8V supplies; integrated decimation filters. | Targets high-channel-count systems with FPGA JESD204B receivers; higher resolution but lower sample rate and no internal reference. | Choose ADS52J90IRGCT for scalable multichannel systems requiring serialized data transport and onboard digital filtering. |
Compared with AD9233BCPZ-125 and ADS52J90IRGCT, the LTC2145IUP-14#TRPBF uniquely balances 14-bit resolution, true simultaneous dual-channel sampling, on-chip reference, and ultra-low jitter - making it optimal for coherent wideband receiver designs where timing alignment and analog flexibility are critical.
Availability
LTC2145IUP-14#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, and portable medical imaging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2145IUP-14#TRPBF 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 LTC2145 series belongs to ADI's high-speed precision ADC product line, engineered for demanding communications and instrumentation applications requiring simultaneous sampling, low power, and exceptional dynamic range at RF/IF frequencies.
FAQ
What is the maximum sampling rate supported by the LTC2145IUP-14#TRPBF?
The LTC2145IUP-14#TRPBF supports a maximum sampling rate of 125Msps, which is the top speed of the LTC2145-14 variant within the LTC2145/LTC2144/LTC2143 family. This rate is fully characterized for AC performance including 73.1dB SNR and 90dB SFDR at 70MHz input frequency, and is specified over the full –40°C to +85°C industrial temperature range.
Does the LTC2145IUP-14#TRPBF require an external reference voltage?
No, the LTC2145IUP-14#TRPBF includes an internal 1.25V reference with ±25ppm/°C drift and supports three input range configurations via the SENSE pin: ±0.5V (SENSE = GND), ±1V (SENSE = VDD), or ±0.8×VSENSE (external 0.625V–1.3V applied to SENSE). An external reference is optional and only needed for specialized calibration or tighter tolerance requirements.
How does the PAR/SER pin affect the functionality of CS, SCK, SDI, and SDO on the LTC2145IUP-14#TRPBF?
When PAR/SER = GND, the LTC2145IUP-14#TRPBF operates in serial programming mode: CS becomes chip select, SCK is the SPI clock, SDI is data-in, and SDO is open-drain data-out. When PAR/SER = VDD, it enters parallel programming mode: CS controls clock duty cycle stabilization, SCK selects output mode, SDI/SDO jointly enable power-down, and SPI functionality is disabled - all functions are controlled by static logic levels.
What are the power consumption characteristics of the LTC2145IUP-14#TRPBF in different operating modes?
In full-speed CMOS mode at 125Msps, the LTC2145IUP-14#TRPBF consumes 189mW total (95mW per channel). In LVDS mode with 3.5mA output current, power rises to 315mW. Sleep mode draws just 1mW, and Nap mode draws 16mW - both retain register settings and allow fast wake-up. Power scales linearly with sample rate in all modes, enabling dynamic power optimization in burst-mode systems.
Can the LTC2145IUP-14#TRPBF be used for single-ended analog input configurations?
Yes, the LTC2145IUP-14#TRPBF supports single-ended analog inputs by tying AIN1– and AIN2– to a clean analog ground or common-mode voltage (VCM1/VCM2), while driving AIN1+ and AIN2+ with referenced signals. However, differential operation is strongly recommended to achieve specified 73.1dB SNR and 90dB SFDR, as single-ended use degrades CMRR and increases susceptibility to noise and offset errors.
LTC2145IUP-14#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 125M
- 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:
- -
LTC2145IUP-14#TRPBF FAQ
1.How can I place an order for LTC2145IUP-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2145IUP-14#TRPBF 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 LTC2145IUP-14#TRPBF reliable?
The price and inventory of LTC2145IUP-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2145IUP-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2145IUP-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2145IUP-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2145IUP-14#TRPBF?
LTC2145IUP-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2145IUP-14#TRPBF 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 LTC2145IUP-14#TRPBF?
For technical support, including LTC2145IUP-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2145IUP-14#TRPBF requirements.
6.How does Aetrix verify that LTC2145IUP-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2145IUP-14#TRPBF 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 LTC2145IUP-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2145IUP-14#TRPBF?
All LTC2145IUP-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2145IUP-14#TRPBF, 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 LTC2145IUP-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2145IUP-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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