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Analog Devices Inc. LTC2165IUK#TRPBF
- Part No.:
- LTC2165IUK#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2165IUK#TRPBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,054
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Product details
Overview
LTC2165IUK#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 125Msps low-power analog-to-digital converter optimized for undersampling high-frequency IF signals in communications infrastructure. It delivers 76.8dB SNR, 90dB SFDR, and ultralow 0.07psRMS aperture jitter with ±2LSB INL and single 1.8V supply operation - enabling high-fidelity digitization in cellular base stations and software-defined radios.
For engineers reviewing the LTC2165IUK#TRPBF datasheet, LTC2165IUK#TRPBF pinout, LTC2165IUK#TRPBF application, or LTC2165IUK#TRPBF equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative ADCs with documented functional trade-offs for RF receiver front-end design.
Technical Context
The LTC2165IUK#TRPBF implements a pipeline ADC architecture with integrated sample-and-hold (550MHz full-power bandwidth), configurable input range (1–2VP-P differential), and selectable output interface modes: full-rate CMOS, DDR CMOS, or DDR LVDS. Its clock input accepts differential (LVDS/PECL) or single-ended (TTL/CMOS) drive with optional duty cycle stabilization.
Digital configuration is performed via a 4-wire SPI port supporting serial programming mode (PAR/SER = GND) or reduced parallel control (PAR/SER = VDD). Power management includes Nap (10mW) and Sleep (1mW) modes, while internal reference (1.25V ±2.5%) and VCM bias (VDD/2 ±25mV) reduce external component count.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over –40°C to +85°C - guarantees monotonicity and full dynamic range utilization in precision measurement. |
| Sampling Rate | 125Msps maximum - supports Nyquist sampling of DC–62.5MHz or undersampling of IF bands up to 140MHz with preserved SFDR. |
| SNR / SFDR | 76.8dB SNR and 90dB SFDR at 70MHz input - enables high-order modulation (e.g., 1024-QAM) in wideband receivers without signal degradation. |
| Aperture Jitter | 0.07psRMS (differential encode) - limits sampling uncertainty to <0.01° phase error at 100MHz, critical for coherent multi-carrier systems. |
| Power Dissipation | 194mW at 125Msps with 1.8V supplies - achieves >76dB SNR per mW, reducing thermal load in dense RF front-end modules. |
| Analog Input BW | 550MHz full-power bandwidth - preserves amplitude flatness and group delay for wideband IF signals without external anti-alias filtering. |
| INL / DNL | ±2LSB INL and ±0.5LSB DNL (typ) - ensures accurate amplitude representation across full code range for calibration-sensitive applications. |
Pinout & Package
48-lead (7mm × 7mm) plastic QFN package with exposed thermal pad (Pin 49 = GND), rated for –40°C to +85°C industrial operation. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM (1) | Common-mode bias output | Nominally VDD/2 (0.9V); used to bias AIN+/AIN– inputs - eliminates need for external common-mode network in differential input stages. |
| AIN+ / AIN– (2,3) | Differential analog input | Accepts 1–2VP-P differential signal; high CMRR (80dB) rejects noise on shared PCB traces. |
| REFH / REFL (5,6,7,8) | ADC reference voltage terminals | Support internal (1.25V) or external reference; dual pairs enable low-inductance decoupling with 0.1µF ceramics. |
| ENC+ / ENC– (15,16) | Differential encode clock input | Accepts LVDS/PECL/TTL/CMOS; falling edge on ENC– triggers conversion - enables precise timing control for synchronous sampling. |
| PAR/SER (9) | Programming mode select | Hardwired to GND for full SPI control (CS/SCK/SDI/SDO) or VDD for simplified parallel mode - defines interface flexibility during board layout. |
| D0–D15 (21–24,36–40) | Parallel data outputs | Configurable as full-rate CMOS, DDR CMOS, or DDR LVDS - selects interface to match FPGA I/O standards (e.g., LVDS for Xilinx Ultrascale). |
| OVDD (32) | Digital output supply | Independent 1.2–1.8V rail - allows level-shifting to match host logic without compromising analog supply noise performance. |
| VDD (12,13,47,48) | Analog power supply | 1.7–1.9V operation with tight regulation requirement - mandates dedicated LDO and local 0.1µF ceramic bypassing per pin group. |
Key Features
| Feature | Design Value |
|---|---|
| Optional clock duty cycle stabilizer | Maintains <±1% duty cycle tolerance at 125MHz - eliminates external clock conditioning circuitry and improves ENOB in asymmetric clock environments. |
| Selectable output interface modes | Full-rate CMOS, DDR CMOS, or DDR LVDS - enables direct interfacing to diverse logic families (e.g., Intel Stratix, Xilinx Kintex) without level translators. |
| Internal 1.25V reference with ±25ppm/°C drift | Eliminates external reference IC and associated trimming - reduces BOM count and layout area in space-constrained SDR modules. |
| Data output randomizer | Reduces deterministic spectral spurs from periodic digital switching - improves SFDR by up to 6dB in narrowband FFT analysis of static input tones. |
| Nap and Sleep power modes | 10mW and 1mW standby power - enables rapid wake-up (<1µs) for burst-mode receivers while meeting stringent system-level power budgets. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) Front-End |
|---|---|
Use Scenario: Digitizing 70MHz LTE carrier with 20MHz bandwidth in macrocell remote radio head. IC Role / Device Role / Timing Role: Primary IF-sampling ADC in zero-IF or low-IF receiver chain, synchronized to FPGA-based digital downconverter. Use Value: 90dB SFDR prevents adjacent-channel interference masking weak signals; 0.07ps jitter maintains EVM <2.5% for 256-QAM. |
Use Scenario: Wideband spectrum monitoring from 10MHz–1GHz using tunable frontend and real-time FFT processing. IC Role / Device Role / Timing Role: High-speed digitizer feeding FPGA FFT engine; configured in DDR LVDS mode for deterministic timing closure. Use Value: 550MHz analog bandwidth captures full instantaneous bandwidth without aliasing; 16-bit resolution enables >90dB dynamic range detection. |
| Portable Medical Ultrasound Beamformer | Multichannel Data Acquisition System |
Use Scenario: Sampling 10–15MHz echo return signals from phased-array transducers in handheld ultrasound units. IC Role / Device Role / Timing Role: Channel ADC in time-gain-compensated receive path; operates in Nap mode between pulses to minimize average power. Use Value: ±2LSB INL ensures accurate amplitude mapping for tissue characterization; 194mW dissipation fits thermal envelope of battery-powered enclosure. |
Use Scenario: Simultaneous acquisition of 8 analog sensor channels (vibration, temperature, strain) at 100ksps/channel in industrial condition monitoring. IC Role / Device Role / Timing Role: High-precision digitizer with external reference for calibrated measurements; uses SPI to configure gain and offset per channel. Use Value: 76.8dB SNR resolves microvolt-level sensor signals; internal VCM simplifies differential driver design across all channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9268BCPZ-125 | 16-bit, 125Msps; requires external reference and separate analog/digital supplies; higher 330mW power at same rate. | Designed for broadband instrumentation; lacks integrated VCM and clock stabilizer - needs more support components. | Choose when external reference precision >1.25V ±0.5% is required or when legacy ADI toolchain integration is mandatory. |
| ADS54J60IRGCT | 16-bit, 500Msps; JESD204B serial interface only; no parallel CMOS/LVDS outputs; 1.1W power at full rate. | Targeted at high-throughput backhaul and radar; incompatible pinout and interface - requires FPGA with JESD204B PHY. | Choose only for new designs requiring >200Msps effective throughput or where JESD204B lane reduction justifies added complexity. |
Compared with AD9268BCPZ-125 and ADS54J60IRGCT, the LTC2165IUK#TRPBF offers lowest system-level component count (integrated VCM, reference, and clock stabilizer), lowest power per SNR dB, and direct compatibility with legacy parallel-FPGA interfaces - making it optimal for cost- and size-constrained RF receiver upgrades.
Availability
LTC2165IUK#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, portable medical imaging, and multichannel data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2165IUK#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 LTC2165IUK#TRPBF belongs to ADI's high-speed precision ADC product line, engineered specifically for undersampling RF/IF signals in communications infrastructure where jitter, SNR, and power efficiency are critical system constraints.
FAQ
What is the operating temperature range for the LTC2165IUK#TRPBF?
The LTC2165IUK#TRPBF is specified for industrial operation from –40°C to +85°C, as indicated by the "I" grade suffix in the part number. This range is validated across all key AC and DC specifications including SNR, SFDR, INL, and power consumption - ensuring reliable performance in outdoor base station enclosures and ruggedized SDR platforms.
Does the LTC2165IUK#TRPBF support both differential and single-ended clock inputs?
Yes, the LTC2165IUK#TRPBF supports both configurations: ENC+ and ENC– can be driven differentially (LVDS/PECL) or single-ended (with ENC– tied to GND and ENC+ driven by TTL/CMOS). The datasheet specifies 0.09psRMS jitter in single-ended mode versus 0.07psRMS in differential mode - confirming robust timing performance across interface options.
Can the LTC2165IUK#TRPBF operate with an external reference voltage?
Yes, the LTC2165IUK#TRPBF supports external reference via the SENSE pin (Pin 46), accepting 0.625V to 1.300V. When used, the internal 1.25V reference is disabled, and gain error shifts from ±1.5%FS (internal) to ±0.7%FS (external) - enabling higher absolute accuracy in metrology-grade data acquisition systems.
What are the power supply requirements for the LTC2165IUK#TRPBF?
The LTC2165IUK#TRPBF requires two independent supplies: VDD (1.7–1.9V, analog core) and OVDD (1.1–1.9V, digital outputs). VDD must be decoupled with 0.1µF ceramics at each pin group; OVDD sets output swing (1.2V/1.5V/1.8V CMOS or 1.8V LVDS). Ground separation (GND vs OGND) and exposed pad soldering are mandatory for specified performance.
How does the PAR/SER pin affect functionality of the LTC2165IUK#TRPBF?
The PAR/SER pin (Pin 9) determines programming interface mode: grounded for full 4-wire SPI control (CS/SCK/SDI/SDO), or tied to VDD for simplified parallel mode where CS/SCK/SDI control clock stabilizer, output format, and power modes. In parallel mode, SDO becomes bidirectional for power-down sequencing - a hardware-level feature not accessible via SPI.
LTC2165IUK#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 125M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel, Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2165IUK#TRPBF FAQ
1.How can I place an order for LTC2165IUK#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2165IUK#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 LTC2165IUK#TRPBF reliable?
The price and inventory of LTC2165IUK#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2165IUK#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2165IUK#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2165IUK#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2165IUK#TRPBF?
LTC2165IUK#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2165IUK#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 LTC2165IUK#TRPBF?
For technical support, including LTC2165IUK#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2165IUK#TRPBF requirements.
6.How does Aetrix verify that LTC2165IUK#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2165IUK#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 LTC2165IUK#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2165IUK#TRPBF?
All LTC2165IUK#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2165IUK#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 LTC2165IUK#TRPBF part is unused and in its original packaging.
Return procedure for LTC2165IUK#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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