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Analog Devices Inc. LTC2271IUKG#PBF
- Part No.:
- LTC2271IUKG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2271IUKG#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:136
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Product details
Overview
LTC2271IUKG#PBF from Analog Devices (acquired Linear Technology) is a dual-channel, simultaneous-sampling 16-bit analog-to-digital converter optimized for high-dynamic-range signal digitization in communications and instrumentation systems. It delivers 84.1dB SNR, 99dB SFDR, ±1LSB INL (typ), operates at 20Msps on a single 1.8V supply, and features serial LVDS outputs with 1/2/4-lane programmability - enabling low-noise data acquisition in portable medical imaging and software-defined radios.
For engineers reviewing the LTC2271IUKG#PBF datasheet, LTC2271IUKG#PBF pinout, LTC2271IUKG#PBF application, or LTC2271IUKG#PBF equivalent, key selection considerations include its differential analog input architecture, 200MHz full-power bandwidth, internal clock duty cycle stabilizer, LVDS output current programmability (1.75mA/3.5mA), and SPI-configurable operating modes for multi-channel synchronization and power optimization.
Technical Context
The LTC2271IUKG#PBF integrates two independent 16-bit ADC cores sharing a common sample-and-hold and encode circuit, ensuring precise channel-to-channel timing alignment. Its analog front-end supports differential inputs with user-selectable common-mode bias via VCM1/VCM2 pins and configurable input ranges (1.0VP-P to 2.1VP-P) through the SENSE pin.
Digital interface logic uses an SPI port (CS/SCK/SDI/SDO) for register configuration, while serial LVDS outputs reduce pin count and EMI - supporting 1-, 2-, or 4-lane serialization per channel with programmable output current and optional on-chip 100Ω termination. The internal PLL and duty cycle stabilizer maintain AC performance across wide encode duty cycle variations.
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 | 20Msps maximum - enables real-time capture of signals up to 10MHz Nyquist bandwidth. |
| SNR | 84.1dB at 5MHz input - corresponds to 46μVRMS input-referred noise for high-fidelity signal recovery. |
| SFDR | 99dB at 5MHz input - suppresses spurious content critical for spectral purity in SDR and radar applications. |
| Power Consumption | 185mW total at 20Msps (92mW/channel) - supports thermally constrained portable and battery-powered systems. |
| Analog Supply | Single 1.8V (1.7V–1.9V) - simplifies power delivery and reduces board-level DC-DC complexity. |
| Input Bandwidth | 200MHz full-power bandwidth - preserves transient fidelity for fast-rising RF and ultrasound waveforms. |
Pinout & Package
Package: 52-lead (7mm × 8mm) plastic QFN with exposed thermal pad (Pin 53 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM1 (1) | Channel 1 common-mode bias output | Nominally VDD/2; used to set AIN1± DC level - bypass with 1μF capacitor to minimize noise coupling. |
| AIN1+, AIN1– (3,4) | Channel 1 differential analog input | High-impedance CMOS S/H inputs requiring 180° phase-matched drive - support 1.0–2.1VP-P range via SENSE. |
| ENC+, ENC– (17,18) | Differential encode clock input | Accepts LVDS/PECL/sine/TTL/CMOS; internal duty cycle stabilizer maintains sampling accuracy across 2–100ns pulse widths. |
| OUT1A+/– to OUT1D+/– (37–44) | Channel 1 serialized LVDS data outputs | Configurable 1/2/4-lane mode; each pair delivers LSB-aligned bits with programmable 1.75mA or 3.5mA current and optional 100Ω termination. |
| FR+, FR– (31,32) | Frame start indicator outputs | Differential LVDS signal marking start of new conversion frame - essential for multi-ADC synchronization and data alignment. |
| DCO+, DCO– (35,36) | Data clock output | LVDS clock synchronized to serialized data - eliminates need for external clock routing and reduces skew in high-speed interfaces. |
| PAR/SER (10) | Programming mode select | Ground = serial SPI control; VDD = parallel logic control - determines whether CS/SCK/SDI/SDO function as interface or mode-select pins. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Guarantees sub-picosecond inter-channel skew - critical for phase-coherent I/Q demodulation and beamforming. |
| Programmable LVDS serialization | Reduces digital interface pins by up to 75% vs parallel output - eases PCB routing and lowers EMI in dense layouts. |
| Internal clock duty cycle stabilizer | Maintains >84dB SNR even with 30%–70% encode duty cycle - relaxes clock source requirements in mixed-signal systems. |
| Configurable input range via SENSE pin | Supports ±0.525V, ±1.05V, or ±0.84×VSENSE ranges - enables optimal dynamic range matching to sensor or amplifier output levels. |
| Low-power shutdown and nap modes | Reduces consumption to 1mW (sleep) or 50mW (nap) - extends battery life in intermittent-acquisition instruments. |
Applications
| Portable Medical Ultrasound Imaging | Software-Defined Radio (SDR) Front-End |
|---|---|
Use Scenario: Digitizing echo return signals from phased-array transducers operating at 2–15MHz carrier frequencies with microsecond-level time-of-flight resolution. IC Role / Device Role / Timing Role: Dual-channel simultaneous ADC capturing I/Q baseband signals with matched gain/offset and <1ps inter-channel jitter for coherent beam synthesis. Use Value: 99dB SFDR prevents harmonic folding of strong near-field reflections into diagnostic bands; 200MHz bandwidth preserves pulse edge fidelity for accurate tissue characterization. | Use Scenario: Direct RF sampling of LTE/WiMAX/5G NR signals in compact base station radios requiring flexible channelization and real-time spectrum analysis. IC Role / Device Role / Timing Role: High-linearity ADC serving as digitizer for wideband tunable receivers - synchronized across multiple units via FR/DCO signals. Use Value: 84.1dB SNR enables detection of weak adjacent-channel interferers; serial LVDS interface minimizes FPGA pin count and routing congestion in multi-antenna arrays. |
| Low-Power Test & Measurement Equipment | Multi-Channel Data Acquisition Systems |
Use Scenario: Battery-operated handheld oscilloscopes and spectrum analyzers requiring >12 effective bits of resolution and <100mW per channel power budget. IC Role / Device Role / Timing Role: Precision ADC core with integrated reference and programmable input range - eliminating external op-amps and voltage references. Use Value: ±1LSB INL (typ) ensures accurate amplitude measurement across temperature; 1.8V single supply simplifies power architecture and reduces heat dissipation. | Use Scenario: Industrial vibration monitoring systems acquiring synchronized analog data from 8–32 sensors (accelerometers, strain gauges) at 20ksps–20Msps rates. IC Role / Device Role / Timing Role: One LTC2271IUKG#PBF per two sensor channels - leveraging simultaneous sampling and SPI configurability for system-level calibration. Use Value: SPI-controlled nap mode allows per-channel power gating during idle periods; LVDS serialization enables daisy-chained backplane connectivity without signal integrity degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 16-bit, serial-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9269BCPZ-20 | 20Msps, 16-bit, dual-channel; JESD204B output instead of LVDS; higher power (320mW); requires 3.3V/1.8V dual supplies. | Targets FPGA-based systems with JESD204B receiver IP; less suitable for legacy LVDS-FPGA or ASIC interfaces. | Select when migrating to high-speed serial interfaces and FPGA resources support JESD204B decoding. |
| LTC2190IUKG#PBF | 25Msps, 16-bit, dual-channel; pin-compatible; lower power (104mW); reduced SFDR (92dB); narrower input bandwidth (120MHz). | Better suited for cost-sensitive, lower-bandwidth applications where 200MHz full-power bandwidth is not required. | Choose for drop-in replacement where higher speed is unnecessary and power reduction is prioritized over SFDR. |
Compared with AD9269BCPZ-20 and LTC2190IUKG#PBF, the LTC2271IUKG#PBF uniquely balances 200MHz analog bandwidth, 99dB SFDR, and 185mW power in an LVDS-serial package - making it optimal for portable RF instrumentation where signal fidelity, thermal envelope, and interface simplicity are jointly constrained.
Availability
LTC2271IUKG#PBF is available at Aetrix Electronics and suitable for portable medical imaging, software-defined radio front-ends, low-power test equipment, and multi-channel data acquisition systems requiring stable component supply across extended industrial temperature ranges.
Supply support for LTC2271IUKG#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, formed through the acquisition of Linear Technology in 2017.
The LTC2271IUKG#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications, instrumentation, and medical applications requiring simultaneous sampling, low power, and robust LVDS interfacing.
FAQ
What is the operating temperature range for the LTC2271IUKG#PBF?
The LTC2271IUKG#PBF is rated for operation from –40°C to +85°C, qualifying it for industrial and extended-temperature environments. This specification is explicitly defined in the Absolute Maximum Ratings table and confirmed across all dynamic and DC performance parameters in the datasheet's "l" (full-range) column. The "I" grade designation in the part number directly indicates this industrial temperature range.
Does the LTC2271IUKG#PBF require an external reference voltage?
No, the LTC2271IUKG#PBF includes an internal 1.25V bandgap reference. It supports three configurations: internal reference with ±1.05V input range (SENSE = GND), ±2.1V range (SENSE = VDD), or user-defined range (±0.84 × VSENSE) with external voltage applied to SENSE between 0.625V and 1.30V. External reference use is optional and only needed for specialized calibration or ultra-stable applications.
How many LVDS data lanes does the LTC2271IUKG#PBF support per channel?
The LTC2271IUKG#PBF supports 1, 2, or 4 serialized LVDS data lanes per channel, selectable via SPI register programming or parallel logic (CS/SCK) depending on PAR/SER pin state. In 4-lane mode, each channel outputs four bits per sample clock cycle on dedicated differential pairs (e.g., OUT1A–/+, OUT1B–/+, etc.), reducing data rate per lane and easing timing closure on the receiving FPGA or ASIC.
Can the LTC2271IUKG#PBF accept single-ended encode inputs?
Yes, the LTC2271IUKG#PBF supports single-ended encode operation: tie ENC– to GND and drive ENC+ with a 0–1.8V square wave or sine wave. The datasheet specifies VIH = 1.2V and VIL = 0.6V for this mode, and performance remains within spec - though differential encoding is recommended for best SNR and jitter immunity, especially above 10MHz.
What is the purpose of the FR+ and FR– pins on the LTC2271IUKG#PBF?
The FR+ and FR– pins on the LTC2271IUKG#PBF provide a differential LVDS frame start signal that asserts at the beginning of each new conversion frame. This signal enables precise synchronization across multiple LTC2271IUKG#PBF devices or with downstream logic, ensuring deterministic alignment of sampled data blocks - essential for time-interleaved architectures or multi-board acquisition systems.
LTC2271IUKG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 20M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- 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:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2271IUKG#PBF FAQ
1.How can I place an order for LTC2271IUKG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2271IUKG#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 LTC2271IUKG#PBF reliable?
The price and inventory of LTC2271IUKG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2271IUKG#PBF is usually 5 days.
3.What payment methods are accepted for LTC2271IUKG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2271IUKG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2271IUKG#PBF?
LTC2271IUKG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2271IUKG#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 LTC2271IUKG#PBF?
For technical support, including LTC2271IUKG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2271IUKG#PBF requirements.
6.How does Aetrix verify that LTC2271IUKG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2271IUKG#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 LTC2271IUKG#PBF meets industry standards.
7.What is the process for return or replacement of LTC2271IUKG#PBF?
All LTC2271IUKG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2271IUKG#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 LTC2271IUKG#PBF part is unused and in its original packaging.
Return procedure for LTC2271IUKG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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