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Analog Devices Inc. LTC2185CUP#TRPBF
- Part No.:
- LTC2185CUP#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2185CUP#TRPBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
LTC2185CUP#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, dual-channel, simultaneous-sampling analog-to-digital converter with 125Msps sampling rate, 76.8dB SNR, and 90dB SFDR. It operates from a single 1.8V supply, supports CMOS/DDR-CMOS/DDR-LVDS outputs, and targets high-fidelity IF digitization in cellular base stations and software-defined radios.
For engineers reviewing the LTC2185CUP#TRPBF datasheet, LTC2185CUP#TRPBF pinout, LTC2185CUP#TRPBF application, or LTC2185CUP#TRPBF equivalent, key selection criteria include its 550MHz full-power bandwidth, ultralow 0.07psRMS jitter, ±2LSB INL, 1.8V single-supply operation, and configurable output interface modes for system-level timing and signal integrity optimization.
Technical Context
The LTC2185CUP#TRPBF integrates two independent 16-bit ADC cores sharing a common sample-and-hold with 550MHz bandwidth and 0.07psRMS acquisition jitter. Its dual-channel architecture enables true simultaneous sampling critical for I/Q demodulation and phase-coherent multi-channel systems.
It features a serial SPI port for configuration of output format (CMOS/DDR-CMOS/DDR-LVDS), clock duty cycle stabilizer, data randomizer, and power modes (Nap: 16mW, Sleep: 1mW). Input range is selectable between 1VP-P and 2VP-P, with internal or external reference support via VREF/SENSE pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision measurement. |
| Sampling Rate | 125Msps - supports Nyquist-limited IF sampling up to 62.5MHz or undersampling of higher RF bands. |
| SNR | 76.8dB at 70MHz input - enables >12.4 effective bits for high-dynamic-range signal capture. |
| SFDR | 90dB at 70MHz input - suppresses harmonics sufficiently for demanding spectral purity requirements in comms receivers. |
| Total Power | 370mW at 125Msps with CMOS outputs - balances performance and thermal budget in dense RF front-ends. |
| Input Bandwidth | 550MHz full-power - preserves amplitude fidelity for wideband signals without external anti-alias filtering penalties. |
| Jitter | 0.07psRMS (differential encode) - minimizes aperture uncertainty, enabling clean undersampling of 100+ MHz IFs. |
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 (1,16,17,64) | Analog supply input | 1.7–1.9V rail; requires local 0.1µF ceramic bypassing per group to maintain noise-sensitive analog core stability. |
| AIN1+/AIN1– (4,5) | Differential analog input channel 1 | Accepts 1–2VP-P differential signal; common-mode biased by VCM1 (Pin 2) at ~0.9V. |
| ENC+/ENC– (18,19) | Differential encode clock input | Triggers conversion on both edges; supports PECL/LVDS/TTL/CMOS; optional duty cycle stabilizer improves timing margin. |
| D1_0–D1_15 / D2_0–D2_15 (23–32,43–58) | Parallel digital output data | 16-bit per channel; configurable as full-rate CMOS, DDR-CMOS, or DDR-LVDS - selects interface voltage swing and timing protocol. |
| PAR/SER (11) | Programming mode select | Ground = Serial SPI mode (full feature control); VDD = Parallel mode (limited register access via CS/SCK/SDI). |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Eliminates inter-channel skew for coherent I/Q processing and beamforming without calibration overhead. |
| Selectable output interface | CMOS/DDR-CMOS/DDR-LVDS options allow matching to FPGA/ASIC I/O standards while optimizing power vs. EMI trade-offs. |
| Optional clock duty cycle stabilizer | Enables robust 125Msps operation even with asymmetric clock sources (e.g., PLL outputs), reducing system-level timing closure effort. |
| Low-power Nap and Sleep modes | Nap (16mW) and Sleep (1mW) states permit rapid power-state transitions during burst-mode or TDD operation without reconfiguration latency. |
| Configurable input range & reference | 1–2VP-P range selection and internal/external reference (via SENSE pin) simplify front-end gain staging across diverse signal chain topologies. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing dual-path IF signals (e.g., 70MHz/140MHz) in macrocell LTE/NR remote radio units. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing phase-aligned I/Q data streams to FPGA-based digital downconverters. Use Value: 76.8dB SNR and 90dB SFDR preserve modulation accuracy for 256-QAM; 550MHz bandwidth supports direct IF sampling without image-reject filtering. | Use Scenario: Reconfigurable wideband receiver in military or test equipment supporting multiple waveforms (e.g., FM, OFDM, pulsed radar). IC Role / Device Role / Timing Role: High-fidelity digitizer capturing instantaneous bandwidth up to 125MHz for real-time spectrum analysis and adaptive demodulation. Use Value: 0.07psRMS jitter enables clean undersampling of UHF/VHF bands; DDR-LVDS outputs reduce EMI in mixed-signal PCB layouts. |
| Portable Medical Ultrasound | Multi-Channel Data Acquisition |
Use Scenario: Beamformed echo digitization in handheld ultrasound systems requiring compact size and low power. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring time-aligned RF echoes from transducer arrays for digital beamforming. Use Value: 370mW total power at 125Msps enables battery-operated designs; simultaneous sampling eliminates channel-to-channel delay calibration. | Use Scenario: High-precision vibration monitoring or acoustic emission sensing across 8–16 channels using time-interleaved or parallel ADC architectures. IC Role / Device Role / Timing Role: Reference-grade dual ADC used in one segment of a modular DAQ chassis for synchronized multi-sensor capture. Use Value: ±2LSB INL and ±0.5LSB DNL ensure <0.003% linearity error in metrology-grade measurements; SPI configurability simplifies system-level calibration routines. |
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, 125Msps, JESD204B serial output, 1.25W typical power | Targets higher channel count systems with FPGA JESD204B receivers; lacks parallel CMOS/DDR-CMOS flexibility | Choose AD9680BCPZ-125 when serial interface and higher channel density outweigh power and interface flexibility needs. |
| ADS52J90IRGCT | 16-bit, 100Msps, 8-channel, LVDS parallel output, 1.3W typical power | Offers 4× more channels in same package but lower per-channel SNR (73.5dB) and no simultaneous sampling guarantee | Choose ADS52J90IRGCT for cost-sensitive, multi-channel systems where inter-channel coherence is less critical than channel count. |
Compared with AD9680BCPZ-125 and ADS52J90IRGCT, the LTC2185CUP#TRPBF delivers superior SNR (76.8dB vs. ≤74dB) and guaranteed simultaneous sampling in a lower-power (370mW), pin-compatible QFN package - making it optimal for phase-coherent, dual-path RF receivers where analog interface flexibility and jitter performance are paramount.
Availability
LTC2185CUP#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, and portable medical imaging applications requiring stable component supply and long-term production continuity.
Supply support for LTC2185CUP#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 LTC2185CUP#TRPBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, low jitter, and flexible digital interfacing.
FAQ
What is the operating temperature range for the LTC2185CUP#TRPBF?
The LTC2185CUP#TRPBF is specified for commercial temperature range: 0°C to +70°C. This is indicated by the "C" suffix in the part number and confirmed in the Absolute Maximum Ratings table. For extended industrial operation (–40°C to +85°C), the LTC2185IUP#TRPBF variant is available.
Does the LTC2185CUP#TRPBF support external voltage reference operation?
Yes, the LTC2185CUP#TRPBF supports external reference mode via the SENSE pin, accepting 0.625V to 1.300V. When enabled, this overrides the internal 1.25V reference (VREF) and allows precise gain calibration or compatibility with system-level reference voltages - a capability confirmed in the "Analog Input" and "Internal Reference Characteristics" sections of the datasheet.
What output interface modes does the LTC2185CUP#TRPBF support?
The LTC2185CUP#TRPBF supports three digital output interface modes: full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS. Mode selection is configured via SPI registers or parallel control inputs (depending on PAR/SER pin state), allowing system designers to match FPGA/ASIC I/O standards while balancing power, noise, and timing requirements.
How many pins does the LTC2185CUP#TRPBF have, and what is its package type?
The LTC2185CUP#TRPBF uses a 64-lead plastic QFN package measuring 9mm × 9mm with an exposed thermal pad (Pin 65 = GND). This is explicitly stated in the "Pin Configurations" section and confirmed across all three output mode diagrams (CMOS, DDR-CMOS, DDR-LVDS) in the datasheet.
Can the LTC2185CUP#TRPBF operate from a single 1.8V supply?
Yes, the LTC2185CUP#TRPBF operates from a single 1.8V analog supply (VDD) and a separate 1.2V–1.8V output supply (OVDD). The recommended VDD range is 1.7V–1.9V, with 1.8V nominal - verified in the "Power Requirements" table and "Typical Application" schematic. This simplifies power delivery in space-constrained RF systems.
LTC2185CUP#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:
- 16
- 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:
- -
LTC2185CUP#TRPBF FAQ
1.How can I place an order for LTC2185CUP#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2185CUP#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 LTC2185CUP#TRPBF reliable?
The price and inventory of LTC2185CUP#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2185CUP#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2185CUP#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2185CUP#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2185CUP#TRPBF?
LTC2185CUP#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2185CUP#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 LTC2185CUP#TRPBF?
For technical support, including LTC2185CUP#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2185CUP#TRPBF requirements.
6.How does Aetrix verify that LTC2185CUP#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2185CUP#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 LTC2185CUP#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2185CUP#TRPBF?
All LTC2185CUP#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2185CUP#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 LTC2185CUP#TRPBF part is unused and in its original packaging.
Return procedure for LTC2185CUP#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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