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Analog Devices Inc. LTC2145CUP-14#PBF
- Part No.:
- LTC2145CUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2145CUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,883
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Product details
Overview
LTC2145CUP-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, dual-channel, simultaneously sampling analog-to-digital converter with 125Msps maximum sample rate, 73.1dB SNR, 90dB SFDR, and 750MHz full-power bandwidth. It operates from a single 1.8V supply and supports CMOS, DDR CMOS, or DDR LVDS digital outputs - ideal for high-performance communications receivers requiring precise phase-matched channel acquisition.
For engineers reviewing the LTC2145CUP-14#PBF datasheet, LTC2145CUP-14#PBF pinout, LTC2145CUP-14#PBF application, or LTC2145CUP-14#PBF equivalent, key selection criteria include simultaneous sampling accuracy, ultralow 0.08psRMS jitter for IF undersampling, configurable input range (1–2VP-P), SPI-based configuration, and low-power operation (189mW total at 125Msps).
Technical Context
The LTC2145CUP-14#PBF implements two independent 14-bit ADC cores sharing a common clock domain to guarantee deterministic inter-channel timing alignment. Its sample-and-hold features 750MHz full-power bandwidth and 0.08psRMS jitter, enabling high-fidelity digitization of RF/IF signals up to 140MHz without external anti-alias filtering in many applications.
Digital interface flexibility includes full-rate CMOS, double-data-rate CMOS, or DDR LVDS output modes, with separate OVDD supply allowing CMOS swing adjustment from 1.2V to 1.8V. Configuration is handled via a 4-wire SPI port supporting register readback, clock duty cycle stabilization, data randomization, and power management (Nap/Sleep modes).
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 systems. |
| Max Sample Rate | 125Msps - enables real-time capture of wideband signals up to 62.5MHz Nyquist bandwidth per channel. |
| SNR @ 70MHz | 73.1dBFS - delivers >12 effective bits of resolution for demanding signal integrity requirements in SDR and medical imaging. |
| SFDR @ 70MHz | 90dBFS - suppresses spurious content sufficiently for multi-tone cellular base station receiver front-ends. |
| Total Power @ 125Msps | 189mW (CMOS mode) - enables thermally constrained portable or dense multi-channel DAQ designs without forced cooling. |
| Input Bandwidth | 750MHz full-power - supports direct sampling of L-band RF signals and simplifies analog front-end design. |
| Jitter (ENC) | 0.08psRMS differential encode - minimizes aperture uncertainty, critical for high-IF undersampling architectures. |
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 performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (1,16,17,64) | Analog supply input | 1.7–1.9V analog rail; must be bypassed locally with 0.1μF ceramic capacitors for noise-sensitive ADC core stability. |
| AIN1+/AIN1– (4,5) | Channel 1 differential analog input | Accepts 1–2VP-P differential signal; common-mode biased by VCM1 (Pin 2) at ~0.9V for 1.8V supply. |
| ENC+/ENC– (18,19) | Differential encode clock input | Triggers conversion on both edges; supports single-ended mode when ENC– tied to GND. |
| PAR/SER (11) | Programming mode select | Ground = serial SPI mode; VDD = parallel logic mode - determines function of CS/SCK/SDI/SDO pins. |
| D1_0–D1_13 / D2_0–D2_13 (25–32, 45–58, 38–39, etc.) | Dual-channel digital data outputs | Configurable as full-rate CMOS, DDR CMOS, or DDR LVDS; output format selected via SPI registers. |
| OVDD (42) | Digital output supply | 1.1–1.9V supply for output drivers; sets CMOS swing level or enables LVDS current-mode operation. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Guarantees matched gain, offset, and phase between channels - essential for I/Q demodulation and beamforming. |
| Configurable input range (1–2VP-P) | Set via SENSE pin voltage (0.625–1.3V); eliminates need for external gain stages in variable-sensitivity systems. |
| Optional data output randomizer | Reduces spectral correlation and EMI emissions in deterministic digital output patterns - improves EMC compliance. |
| Integrated clock duty cycle stabilizer | Compensates for non-50% clock duty cycles without external circuitry - maintains timing margin at full 125Msps rate. |
| SPI-configurable Nap/Sleep modes | Reduces power to 16mW (Nap) or 1mW (Sleep) - enables rapid wake-up for burst-mode acquisition in battery-powered instruments. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing dual-path receive signals in LTE/5G macrocell remote radio heads with tight inter-channel phase matching. IC Role / Device Role / Timing Role: Simultaneously sampled dual ADC providing synchronized I/Q data streams for digital downconversion and MIMO processing. Use Value: 73.1dB SNR and 90dB SFDR meet 3GPP ACLR requirements; 0.08psRMS jitter preserves EVM under high IF sampling. | Use Scenario: Reconfigurable wideband receiver front-end in military or test equipment supporting multiple waveforms (FM, OFDM, pulsed radar). IC Role / Device Role / Timing Role: High-speed dual ADC enabling real-time spectrum analysis and adaptive signal classification across 10MHz–140MHz bands. Use Value: 750MHz input bandwidth allows direct RF sampling; SPI programmability supports rapid mode switching between standards. |
| Portable Medical Imaging | Multi-Channel Data Acquisition |
Use Scenario: Ultrasound beamformer digitizing echo returns from phased-array transducers in handheld diagnostic devices. IC Role / Device Role / Timing Role: Dual-channel ADC capturing time-aligned RF echoes with sub-nanosecond inter-channel skew for precise delay estimation. Use Value: Simultaneous sampling and <±1.5mV offset matching enable coherent beamforming; 189mW total power fits thermal envelope of portable enclosures. | Use Scenario: High-density instrumentation system acquiring synchronized analog inputs from sensors (strain gauges, accelerometers, thermocouples) across 8+ channels. IC Role / Device Role / Timing Role: Dual ADC used in time-interleaved or parallel-channel architecture to achieve >250Msps aggregate throughput with calibrated timing alignment. Use Value: ±1LSB INL and ±0.3LSB DNL ensure measurement linearity; SPI interface enables per-device calibration storage in EEPROM. |
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 |
|---|---|---|---|
| AD9680BCPZ-125 | 14-bit, dual 125Msps with JESD204B interface; higher power (1.5W), integrated digital downconverter. | Targets FPGA-connected systems requiring serial lane reduction and on-chip DDC; not pin-compatible. | Select when JESD204B backhaul, real-time decimation, or lower PCB routing density outweighs power budget constraints. |
| LTC2268-14IUP#PBF | 14-bit, single 125Msps; identical package but lacks second channel and simultaneous sampling capability. | Suitable only for single-input systems; requires two devices and external synchronization for dual-channel use. | Choose only if channel count can be reduced or external timing alignment (e.g., shared clock/trigger) is acceptable. |
Compared with AD9680BCPZ-125 and LTC2268-14IUP#PBF, the LTC2145CUP-14#PBF uniquely delivers true simultaneous dual-channel sampling in a low-power, parallel-output QFN package - making it optimal for space-constrained, thermally sensitive, or FPGA-I/O-limited designs where deterministic inter-channel latency is mandatory.
Availability
LTC2145CUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, portable medical imaging, and multi-channel data acquisition requiring stable component supply and long-term industrial availability.
Supply support for LTC2145CUP-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 industrial, automotive, communications, and healthcare markets.
The LTC2145 family was designed specifically for high-dynamic-range, low-power, dual-channel digitization in communications and instrumentation - emphasizing simultaneous sampling fidelity, flexible digital interfacing, and robust RF input performance.
FAQ
What is the operating temperature range for the LTC2145CUP-14#PBF?
The LTC2145CUP-14#PBF is rated for 0°C to 70°C ambient operation (C-grade). This is confirmed in the Order Information table, where "CUP" denotes the commercial temperature grade. The device meets all specified DC and AC performance parameters - including ±1LSB INL and 73.1dB SNR - across this full range.
Does the LTC2145CUP-14#PBF support differential analog input drive?
Yes, the LTC2145CUP-14#PBF fully supports differential analog input drive on both channels (AIN1+/AIN1– and AIN2+/AIN2–). The datasheet specifies differential input voltage range of 1–2VP-P and common-mode rejection ratio of 80dB. Input common-mode voltage is internally set to ~0.9V (VDD/2) and may be externally adjusted using the VCM1/VCM2 pins.
Can the LTC2145CUP-14#PBF operate with a 1.2V OVDD supply for CMOS outputs?
Yes, the LTC2145CUP-14#PBF supports OVDD from 1.1V to 1.9V in CMOS output modes. At OVDD = 1.2V, the high-level output voltage is guaranteed ≥1.185V and low-level ≤0.010V with 500μA load - enabling direct interfacing with 1.2V logic families while maintaining noise margin.
How is the input range configured on the LTC2145CUP-14#PBF?
The LTC2145CUP-14#PBF input range is configured via the SENSE pin (Pin 63): tying to VDD selects ±1V range, grounding selects ±0.5V range, and applying 0.625–1.3V selects ±0.8×VSENSE. This analog-programmable range eliminates external gain-switching circuitry and supports dynamic range adaptation in real time via DAC control.
Is the LTC2145CUP-14#PBF pin-compatible with other members of the LTC214x-14 family?
Yes, the LTC2145CUP-14#PBF shares identical 64-pin QFN package, pinout, and footprint with LTC2144-14 and LTC2143-14 variants. All three devices are hardware-compatible; differentiation is solely in maximum sample rate (125/105/80Msps) and corresponding power consumption - enabling drop-in upgrades or cost-optimized downgrades within the same PCB design.
LTC2145CUP-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):
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2145CUP-14#PBF FAQ
1.How can I place an order for LTC2145CUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2145CUP-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 LTC2145CUP-14#PBF reliable?
The price and inventory of LTC2145CUP-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 LTC2145CUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2145CUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2145CUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2145CUP-14#PBF?
LTC2145CUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2145CUP-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 LTC2145CUP-14#PBF?
For technical support, including LTC2145CUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2145CUP-14#PBF requirements.
6.How does Aetrix verify that LTC2145CUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2145CUP-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 LTC2145CUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2145CUP-14#PBF?
All LTC2145CUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2145CUP-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 LTC2145CUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2145CUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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