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Analog Devices Inc. LTC2269CUK#PBF
- Part No.:
- LTC2269CUK#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2269CUK#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
LTC2269CUK#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 20Msps low-noise analog-to-digital converter optimized for high-dynamic-range signal digitization in communications systems. It delivers 84.1dB SNR, 99dB SFDR, ±1LSB typical INL, single 1.8V supply operation, and supports CMOS/DDR-CMOS/DDR-LVDS digital outputs - enabling high-fidelity acquisition in software-defined radios and portable medical imaging.
For engineers reviewing the LTC2269CUK#PBF datasheet, LTC2269CUK#PBF pinout, LTC2269CUK#PBF application, or LTC2269CUK#PBF equivalent, key selection criteria include its 200MHz full-power bandwidth, 1.44LSBRMS transition noise, differential encode interface with duty cycle stabilizer, SPI-configurable output modes, and 48-lead 7mm × 7mm QFN package with exposed thermal pad.
Technical Context
The LTC2269CUK#PBF implements a fully differential sample-and-hold front-end with programmable input range (1.0VP-P to 2.1VP-P) and internal 1.25V reference. Its ADC core uses correlated double sampling and digital correction logic to achieve ±1LSB INL and ±0.2LSB DNL over temperature.
Digital output flexibility includes three selectable modes: full-rate CMOS (16 single-ended outputs), DDR-CMOS (8 multiplexed outputs), or DDR-LVDS (8 differential pairs), each with configurable current drive and optional on-chip 100Ω termination. Clocking supports differential (LVDS/PECL) or single-ended (TTL/CMOS) ENC inputs with integrated duty cycle stabilizer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across operating temperature. |
| Sampling Rate | 20Msps maximum - enables real-time digitization of IF signals up to 10MHz Nyquist bandwidth. |
| SNR | 84.1dB at 5MHz input - corresponds to 46μVRMS input-referred noise for high-fidelity baseband capture. |
| SFDR | 99dB at 5MHz input - suppresses spurious content critical for multi-carrier SDR and radar applications. |
| INL / DNL | ±1LSB typ / ±0.2LSB typ - ensures accurate amplitude linearity for precision instrumentation and medical imaging. |
| Power Dissipation | 88mW at 20Msps with CMOS outputs - achieves low thermal load in space-constrained portable systems. |
| Input Bandwidth | 200MHz full-power - supports wideband RF sampling without external anti-alias filtering below 100MHz. |
| Supply Voltage | 1.8V ±0.1V analog (VDD), 1.2–1.8V digital (OVDD) - simplifies power delivery with single LDO and rail-flexible I/O. |
Pinout & Package
48-lead (7mm × 7mm) plastic QFN package with exposed thermal pad (Pin 49 = GND, must be soldered to PCB). Pin pitch: 0.5mm. Thermal resistance θJA = 29°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM (1) | Analog common-mode bias output | Nominally VDD/2 (0.9V); used to bias AIN+/AIN– differential pair for optimal linearity and CMRR. |
| AIN+ / AIN– (2,3) | Differential analog input terminals | Accept 1.0–2.1VP-P swing centered at VCM; require 180° phase match and matched trace lengths. |
| ENC+ / ENC– (15,16) | Differential encode clock inputs | Trigger conversion on rising/falling edges; support PECL/LVDS/TTL/CMOS; duty cycle stabilizer enabled via CS. |
| D0–D15 (21–28,33–40) | Digital data outputs | Configurable as full-rate CMOS, DDR-CMOS (8 pins), or DDR-LVDS (8 differential pairs); OVDD-supplied. |
| CLKOUT+ / CLKOUT– (30,29) | Data output clock (LVDS or CMOS) | Synchronizes data valid windows; phase delay programmable via SPI to align with FPGA/ASIC capture timing. |
| PAR/SER (9) | Programming mode select | Ground = serial SPI interface (CS/SCK/SDI/SDO); VDD = parallel control (CS/SCK/SDI configure basic modes). |
| SENSE (46) | Reference and input range programming | Set internal reference range: tied to VDD → ±1.05V; to GND → ±0.525V; 0.625–1.3V → ±0.84×VSENSE. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output interface | Hardware-selectable CMOS / DDR-CMOS / DDR-LVDS - reduces PCB layer count (DDR modes halve I/O count) and EMI (LVDS mode lowers digital switching noise). |
| Programmable input range | 1.0VP-P to 2.1VP-P via SENSE pin - enables optimization for signal chain dynamic range without external gain stages. |
| Integrated clock duty cycle stabilizer | Enables full-speed 20Msps operation with >20%–80% ENC duty cycle - eliminates need for external clock conditioning circuitry. |
| SPI configuration port | Serial interface (CS/SCK/SDI/SDO) configures output mode, clock phase, power modes, and test patterns - enables runtime reconfiguration in embedded systems. |
| Low-power sleep/naps modes | 0.5mW sleep, 10mW nap - extends battery life in portable instrumentation and intermittent-acquisition systems. |
| On-chip 100Ω LVDS termination | Enabled per differential pair in DDR-LVDS mode - removes need for external 100Ω resistors, saving board area and improving signal integrity. |
Applications
| Software Defined Radio (SDR) | Portable Medical Ultrasound |
|---|---|
Use Scenario: Digitizing 70MHz IF signals in compact cognitive radio platforms with tight SWaP constraints. IC Role / Device Role / Timing Role: Primary ADC capturing complex baseband I/Q data at 20Msps with 99dB SFDR to resolve adjacent-channel interference. Use Value: 200MHz full-power bandwidth avoids external anti-alias filtering; DDR-LVDS outputs reduce FPGA pin count and EMI coupling into sensitive analog sections. | Use Scenario: High-resolution beamforming in handheld ultrasound probes requiring low power and minimal thermal rise. IC Role / Device Role / Timing Role: 16-bit digitizer for echo return signals with 84.1dB SNR to preserve tissue contrast resolution. Use Value: 88mW power dissipation enables continuous scanning without probe overheating; SPI-configurable nap mode extends battery runtime between acquisitions. |
| Multichannel Data Acquisition | Low-Power Instrumentation |
Use Scenario: Simultaneous sampling across 8+ channels in modular test equipment using time-interleaved or parallel ADC architectures. IC Role / Device Role / Timing Role: Channel ADC with deterministic 6.5-cycle pipeline latency and programmable CLKOUT phase for precise inter-channel skew alignment. Use Value: ±1LSB INL ensures channel-to-channel amplitude matching; DDR-CMOS outputs minimize routing congestion on dense backplanes. | Use Scenario: Battery-powered vibration analysis sensors deployed in industrial predictive maintenance nodes. IC Role / Device Role / Timing Role: Precision ADC interfacing with MEMS accelerometers, delivering 1.44LSBRMS transition noise for sub-millig acceleration resolution. Use Value: Single 1.8V supply simplifies energy harvesting power management; shutdown mode draws only 0.5mW during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9269BCPZ-20 | 16-bit, 20Msps, 1.8V supply, but uses JESD204B serial output instead of parallel CMOS/LVDS; higher 115mW power. | Requires FPGA with JESD204B receiver; better suited for high-channel-count systems needing reduced interconnect density. | Select AD9269BCPZ-20 when serial interface and FPGA compatibility outweigh parallel I/O simplicity and lower power. |
| LTC2160IUK#PBF | Pin-compatible 16-bit, 25Msps variant with identical QFN-48 package and register map; 45mW power, slightly lower SFDR (97dB). | Direct drop-in upgrade path for higher sample rate where 5Msps margin is acceptable and lower power is critical. | Select LTC2160IUK#PBF when 25Msps sampling is required and system layout cannot change; verify thermal design for same footprint. |
Compared with AD9269BCPZ-20 and LTC2160IUK#PBF, the LTC2269CUK#PBF provides superior SNR (84.1dB vs. 82.5dB/83.2dB) and lowest power (88mW) among parallel-output 16-bit 20Msps ADCs, making it optimal for thermally constrained, noise-sensitive SDR and medical front ends.
Availability
LTC2269CUK#PBF is available at Aetrix Electronics and suitable for software defined radio development, portable medical imaging systems, multichannel data acquisition hardware, and low-power instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for LTC2269CUK#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP solutions for precision and high-speed applications.
The LTC2269CUK#PBF belongs to Linear's high-speed precision ADC product line, designed specifically for demanding communications, instrumentation, and medical imaging systems requiring exceptional dynamic range and low power in compact form factors.
FAQ
What is the operating temperature range for the LTC2269CUK#PBF?
The LTC2269CUK#PBF is specified for the commercial temperature range of 0°C to +70°C, as indicated by the 'C' grade suffix in the part number. This distinguishes it from the industrial-grade LTC2269IUK#PBF (–40°C to +85°C). The device maintains full performance specifications-including ±2.3LSB max INL, 84.1dB SNR, and 99dB SFDR-across this entire range, validated per the datasheet's 'l'-denoted conditions.
Does the LTC2269CUK#PBF support differential analog input only?
Yes, the LTC2269CUK#PBF requires differential analog input at AIN+ and AIN– pins; single-ended input is not supported. The internal sample-and-hold architecture is fully differential, and optimal performance-including 84.1dB SNR and 99dB SFDR-depends on balanced 180° phase-matched drive with common-mode voltage set by the VCM pin (nominally 0.9V). Attempting single-ended drive degrades CMRR, increases distortion, and voids guaranteed AC specifications.
How is the input voltage range configured on the LTC2269CUK#PBF?
The LTC2269CUK#PBF input range is configured via the SENSE pin: tying SENSE to VDD selects ±1.05V (2.1VP-P); tying to GND selects ±0.525V (1.05VP-P); applying 0.625V–1.3V to SENSE sets ±0.84×VSENSE. This direct hardware configuration eliminates need for external resistive dividers or DAC-controlled references, enabling rapid range adaptation in multi-signal systems without firmware changes.
Can the LTC2269CUK#PBF operate with a 1.2V OVDD supply for CMOS outputs?
Yes, the LTC2269CUK#PBF supports OVDD from 1.1V to 1.8V in CMOS output modes. At OVDD = 1.2V, VOH is guaranteed ≥1.185V and VOL ≤0.010V under 500μA load, enabling direct interfacing with 1.2V FPGA I/O banks. This rail-flexibility allows system-level power optimization-e.g., running digital logic at 1.2V while analog section remains at 1.8V-without level-shifting components.
What is the purpose of the PAR/SER pin on the LTC2269CUK#PBF?
The PAR/SER pin on the LTC2269CUK#PBF selects between two configuration interfaces: grounded (0V) enables full-featured serial SPI programming (CS/SCK/SDI/SDO), allowing complete register control including output mode, clock phase, and power states; tied to VDD enables simplified parallel mode where CS/SCK/SDI directly control basic functions like duty cycle stabilizer and output format. PAR/SER must be hard-wired-not driven dynamically-to ensure reliable boot-up behavior.
LTC2269CUK#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 20M
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2269CUK#PBF FAQ
1.How can I place an order for LTC2269CUK#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2269CUK#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 LTC2269CUK#PBF reliable?
The price and inventory of LTC2269CUK#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2269CUK#PBF is usually 5 days.
3.What payment methods are accepted for LTC2269CUK#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2269CUK#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2269CUK#PBF?
LTC2269CUK#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2269CUK#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 LTC2269CUK#PBF?
For technical support, including LTC2269CUK#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2269CUK#PBF requirements.
6.How does Aetrix verify that LTC2269CUK#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2269CUK#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 LTC2269CUK#PBF meets industry standards.
7.What is the process for return or replacement of LTC2269CUK#PBF?
All LTC2269CUK#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2269CUK#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 LTC2269CUK#PBF part is unused and in its original packaging.
Return procedure for LTC2269CUK#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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