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Analog Devices Inc. LTC2271CUKG#PBF
- Part No.:
- LTC2271CUKG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2271CUKG#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:287
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Product details
Overview
LTC2271CUKG#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. It delivers 84.1dB SNR, 99dB SFDR, ±1LSB INL (typ), 20Msps sampling rate, and operates from a single 1.8V supply with serial LVDS outputs.
For engineers reviewing the LTC2271CUKG#PBF datasheet, LTC2271CUKG#PBF pinout, LTC2271CUKG#PBF application, or LTC2271CUKG#PBF equivalent, key selection considerations include its 2-channel simultaneous sampling architecture, programmable 1/2/4-lane LVDS serialization, internal clock duty cycle stabilizer, low-power 185mW operation, and support for differential or single-ended encode inputs across 0°C to 70°C temperature range.
Technical Context
The LTC2271CUKG#PBF integrates two independent 16-bit ADC cores sharing a common sample-and-hold and encode circuit, enabling true simultaneous sampling with <±0.06%FS gain matching and <±1.5mV offset matching. Its internal 1.25V reference supports selectable input ranges (1.05V–2.1VP-P) via the SENSE pin, and the VCM1/VCM2 outputs provide precise 0.9V common-mode bias for differential analog inputs.
Digital interface uses configurable serial LVDS outputs with on-chip 100Ω termination, adjustable 1.75mA/3.5mA output current, and frame/data clock outputs (FR+/FR–, DCO+/DCO–). Configuration is performed via a 3-wire SPI port (CS/SCK/SDI/SDO), supporting shutdown and nap modes that reduce power to 1mW and 50mW respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over temperature - guarantees full code coverage in precision measurement systems. |
| Sampling Rate | 20Msps maximum - enables real-time digitization of signals up to 10MHz Nyquist bandwidth. |
| SNR / SFDR | 84.1dB SNR and 99dB SFDR at 5MHz input - supports high-fidelity RF and medical imaging signal capture. |
| INL / DNL | ±1LSB INL (typ), ±0.2LSB DNL (typ) - ensures linearity critical for spectral analysis and calibration-critical instrumentation. |
| Supply & Power | Single 1.8V analog/digital supply; 185mW total at 20Msps - simplifies power design and reduces thermal load in portable systems. |
| Input Bandwidth | 200MHz full-power bandwidth - accommodates wideband IF sampling in SDR and radar front-ends. |
| Operating Temp | 0°C to 70°C (C-grade) - validated for commercial and industrial embedded data acquisition environments. |
Pinout & Package
52-lead (7mm × 8mm) plastic QFN package with exposed thermal pad (Pin 53 = GND), requiring soldering to PCB ground plane for thermal and electrical performance. Pin functions are fully defined per Linear Technology datasheet 2271f.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM1 (1), VCM2 (14) | Analog common-mode bias output | Nominally VDD/2 (0.9V); used to bias AIN1±/AIN2± differential inputs - eliminates external bias networks. |
| AIN1+ (3), AIN1– (4), AIN2+ (11), AIN2– (12) | Differential analog input pairs | High-Z CMOS S/H inputs with 17pF capacitance; require 180° phase-matched drive for optimal distortion performance. |
| ENC+ (17), ENC– (18) | Encode clock inputs | Support differential (LVDS/PECL) or single-ended (TTL/CMOS) operation; internal duty cycle stabilizer maintains performance across 2–100ns pulse widths. |
| PAR/SER (10) | Programming mode select | Ground = serial SPI mode (CS/SCK/SDI/SDO active); VDD = parallel mode (CS/SCK control lane count, SDI controls power-down). |
| OUT1A± to OUT1D±, OUT2A± to OUT2D± (37–44, 23–30) | Serial LVDS data outputs | Configurable 1/2/4-lane per channel; each pair provides 100Ω on-chip termination and 1.75/3.5mA programmable drive strength. |
| FR± (31/32), DCO± (35/36) | Frame start and data clock outputs | Synchronous LVDS timing references for FPGA/ASIC deserialization - eliminates need for external clock recovery. |
| SENSE (50) | Reference programming input | Selects input range: tied to VDD → ±1.05V; to GND → ±0.525V; 0.625–1.3V applied → ±0.84×VSENSE. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Guarantees time-aligned conversion for phase-coherent multi-channel systems like ultrasound beamforming or I/Q demodulation. |
| Programmable LVDS serialization (1/2/4 lanes) | Reduces PCB trace count by up to 4× vs parallel interfaces - critical for high-density RF front-end layouts. |
| Internal clock duty cycle stabilizer | Maintains AC performance across wide encode duty cycles (2%–98%), enabling use with non-50% clocks from PLLs or crystal oscillators. |
| Low-noise 1.25V internal reference | Provides ±25ppm/°C drift and 1.23–1.27V accuracy - eliminates external reference ICs in cost-sensitive instrumentation designs. |
| Flexible power management | Three operational states: full (185mW), nap (50mW), shutdown (1mW) - extends battery life in portable medical and test equipment. |
Applications
| Software-Defined Radio (SDR) Front-End | Portable Ultrasound Imaging |
|---|---|
|
Use Scenario: Digitizing dual-channel IF signals (e.g., I/Q baseband) in handheld SDR transceivers operating up to 80MHz. IC Role / Device Role / Timing Role: Simultaneous 16-bit sampling of I and Q paths with matched gain/offset for coherent demodulation. Use Value: 99dB SFDR prevents harmonic interference in crowded spectrum; 200MHz S/H bandwidth supports direct IF sampling without downconversion. |
Use Scenario: Capturing echo return signals from dual transducer arrays in battery-powered point-of-care ultrasound devices. IC Role / Device Role / Timing Role: Low-power, high-SNR digitization of time-of-flight analog waveforms with precise channel-to-channel timing alignment. Use Value: 84.1dB SNR enables detection of weak tissue reflections; 185mW total power allows >4 hours runtime on compact Li-ion batteries. |
| Multi-Channel Data Acquisition System | Low-Power Instrumentation Recorder |
|
Use Scenario: High-accuracy voltage/current monitoring across 8+ sensor channels in industrial process control cabinets. IC Role / Device Role / Timing Role: Dual ADC core used in time-interleaved or multiplexed configuration to increase effective channel count while maintaining synchronization. Use Value: ±1LSB INL ensures calibrated measurement accuracy across temperature; SPI configuration enables remote calibration updates. |
Use Scenario: Field-deployable environmental sensor node logging temperature, pressure, and acoustic emissions over extended periods. IC Role / Device Role / Timing Role: Primary digitizer operating in nap mode between triggered acquisitions to minimize average power draw. Use Value: 50mW nap mode + 1mW shutdown extends 2xAA battery life to >12 months; 16-bit resolution captures subtle long-term drift trends. |
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; requires separate 3.3V digital supply and external reference; LVDS outputs lack on-chip termination. | Higher power (330mW), less integrated bias/reference - suited for systems with existing 3.3V rails and precision external references. | Choose AD9269BCPZ-20 when higher analog input voltage range (2.048V) or JESD204B interface is required; avoid if single-supply simplicity is critical. |
| LTC2190CUK#PBF | Pin-compatible 16-bit, 25Msps variant; identical QFN-52 package and SPI interface; 104mW lower power but reduced SFDR (92dB vs 99dB). | Optimized for lower-power, slightly lower-performance applications where 25Msps sampling is needed and SFDR margin can be relaxed. | Choose LTC2190CUK#PBF for drop-in replacement where higher speed is prioritized over ultimate spurious performance; verify layout compatibility with same footprint. |
Compared with AD9269BCPZ-20 and LTC2190CUK#PBF, the LTC2271CUKG#PBF offers superior integration (single 1.8V supply, internal reference, on-chip LVDS termination) and best-in-class SFDR for demanding communications applications, at the cost of slightly higher power than the LTC2190.
Availability
LTC2271CUKG#PBF is available at Aetrix Electronics and suitable for software-defined radio development, portable medical imaging systems, and multi-channel data acquisition requiring stable component supply with guaranteed lead-free compliance and full temperature-range validation.
Supply support for LTC2271CUKG#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 LTC2271CUKG#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for low-power, high-dynamic-range digitization in portable and space-constrained instrumentation and communications equipment.
FAQ
What is the maximum sampling rate supported by the LTC2271CUKG#PBF?
The LTC2271CUKG#PBF supports a maximum sampling rate of 20Msps, as specified in its absolute maximum ratings and verified across the full 0°C to 70°C operating temperature range. At this rate, it achieves 84.1dB SNR and 99dB SFDR with a 5MHz input tone. Performance remains stable under recommended conditions: VDD = OVDD = 1.8V, 2-lane LVDS output mode, and differential encode input.
Does the LTC2271CUKG#PBF require an external reference voltage?
No, the LTC2271CUKG#PBF includes a precision internal 1.25V reference with ±25ppm/°C drift and 1.23–1.27V output tolerance. The SENSE pin configures input range selection: tying to VDD yields ±1.05V, to GND yields ±0.525V, or applying 0.625–1.30V sets ±0.84×VSENSE. External reference is optional and only needed for specialized calibration requirements beyond internal reference specs.
How many LVDS data lanes does the LTC2271CUKG#PBF support per channel?
The LTC2271CUKG#PBF supports three configurable LVDS serialization modes per channel: 1-lane (16 bits serialized over 16 clock cycles), 2-lane (8 bits over 8 cycles), or 4-lane (4 bits over 4 cycles). Lane count is selected via CS and SCK pins in parallel mode or SPI register writes in serial mode. All modes use the same FR+/FR– frame and DCO+/DCO– clock outputs.
What is the purpose of the VCM1 and VCM2 pins on the LTC2271CUKG#PBF?
VCM1 (Pin 1) and VCM2 (Pin 14) are dedicated analog common-mode bias outputs, each nominally equal to VDD/2 (0.9V at 1.8V supply). They provide low-impedance, temperature-stable DC bias for the AIN1± and AIN2± differential analog inputs respectively. Each must be bypassed to ground with a 1μF ceramic capacitor to maintain optimal THD and SNR performance.
Can the LTC2271CUKG#PBF operate with single-ended encode inputs?
Yes, the LTC2271CUKG#PBF supports single-ended encode operation by tying ENC– (Pin 18) to GND and driving ENC+ (Pin 17) with a 0–3.6V logic signal. In this mode, VIH = 1.2V and VIL = 0.6V at VDD = 1.8V. However, differential encode is recommended for best jitter performance (100fs RMS vs 85fs RMS) and improved noise immunity in RF-dense environments.
LTC2271CUKG#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2271CUKG#PBF FAQ
1.How can I place an order for LTC2271CUKG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2271CUKG#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 LTC2271CUKG#PBF reliable?
The price and inventory of LTC2271CUKG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2271CUKG#PBF is usually 5 days.
3.What payment methods are accepted for LTC2271CUKG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2271CUKG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2271CUKG#PBF?
LTC2271CUKG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2271CUKG#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 LTC2271CUKG#PBF?
For technical support, including LTC2271CUKG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2271CUKG#PBF requirements.
6.How does Aetrix verify that LTC2271CUKG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2271CUKG#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 LTC2271CUKG#PBF meets industry standards.
7.What is the process for return or replacement of LTC2271CUKG#PBF?
All LTC2271CUKG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2271CUKG#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 LTC2271CUKG#PBF part is unused and in its original packaging.
Return procedure for LTC2271CUKG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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