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Analog Devices Inc. LTC2171CUKG-12#PBF
- Part No.:
- LTC2171CUKG-12#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2171CUKG-12#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:171
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Product details
Overview
LTC2171CUKG-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 4-channel simultaneous-sampling analog-to-digital converter optimized for high-frequency communications signal digitization. It delivers 71dB SNR and 90dB SFDR at 40Msps, with ultralow 0.15psRMS jitter and 800MHz full-power bandwidth, enabling undersampling of IF signals in cellular base stations and software-defined radios.
For engineers reviewing the LTC2171CUKG-12#PBF datasheet, LTC2171CUKG-12#PBF pinout, LTC2171CUKG-12#PBF application, or LTC2171CUKG-12#PBF equivalent, key selection criteria include its quad-channel synchronization capability, serial LVDS output configuration (1- or 2-lane), 1.8V single-supply operation, and support for differential or single-ended clock inputs with internal duty-cycle stabilization.
Technical Context
The LTC2171CUKG-12#PBF implements four independent 12-bit ADC cores with shared sample-and-hold circuitry, enabling true simultaneous sampling across all channels. Its architecture includes an internal clock duty cycle stabilizer, selectable input ranges (1VP-P to 2VP-P), and configurable LVDS output drive strength (1.75mA or 3.5mA per lane).
It supports both serial SPI configuration and parallel pin-programmable modes via PAR/SER, CS, and SCK pins. Digital outputs are serialized LVDS with frame (FR) and data clock (DCO) signals, and the device offers shutdown and nap modes for dynamic power management - consuming only 198mW total at 40Msps in 2-lane mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision acquisition systems. |
| Sampling Rate | 40Msps - fixed speed grade for LTC2171-12 variant, enabling deterministic timing in multichannel IF sampling applications. |
| SNR / SFDR | 71dB SNR and 90dB SFDR at 70MHz input - ensures high-fidelity digitization of wideband RF/IF signals with minimal noise floor degradation. |
| Analog Input BW | 800MHz full-power bandwidth - supports direct sampling of L-band and lower S-band frequencies without external amplification. |
| Supply Voltage | Single 1.8V analog (VDD) and digital (OVDD) supply - simplifies power delivery and reduces board-level DC-DC complexity. |
| Jitter Performance | 0.15psRMS aperture jitter - enables clean undersampling of multi-MHz IF signals with minimal SNR penalty. |
| Power Dissipation | 198mW total at 40Msps (2-lane, 1.75mA mode) - balances performance and thermal load in dense RF front-end layouts. |
Pinout & Package
52-pin (7mm × 8mm) plastic QFN package 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 |
|---|---|---|
| AIN1+ / AIN1– AIN2+ / AIN2– AIN3+ / AIN3– AIN4+ / AIN4– |
Differential analog inputs (Ch. 1–4) | Four matched input pairs accepting 1VP-P to 2VP-P differential signals; biased by VCM12/VCM34 for common-mode stability. |
| ENC+ / ENC– | Differential encode clock input | Accepts LVDS, PECL, TTL, or CMOS; internal duty-cycle stabilizer maintains timing accuracy across wide input duty cycles. |
| OUT1A+/– to OUT4B+/– | LVDS serialized data outputs | Eight differential LVDS lanes (2 per channel); configurable 1- or 2-lane mode; on-chip 100Ω termination enabled via SDO pin. |
| FR+, FR– / DCO+, DCO– | Frame and data clock outputs | Synchronize serialized data capture; FR toggles once per conversion cycle; DCO aligns with data bit transitions. |
| PAR/SER, CS, SCK, SDI | Configuration interface | Enable parallel pin-strapping (PAR/SER = VDD) or serial SPI programming (PAR/SER = GND); CS selects output mode, SCK sets LVDS current. |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Guarantees phase-coherent acquisition across four channels - essential for beamforming, MIMO, and time-of-flight measurements. |
| Serial LVDS output interface | Reduces PCB trace count by >50% vs parallel CMOS; supports 1- or 2-lane serialization per channel with programmable drive strength. |
| Internal clock duty cycle stabilizer | Enables high-performance operation with non-50% duty cycle clocks - eliminates need for external clock conditioning circuitry. |
| Low-power sleep and nap modes | Reduces power to 1mW (sleep) or 75mW (nap) - allows rapid wake-up while minimizing system-level standby consumption. |
| Pin-compatible family | Shares identical 52-pin QFN footprint and pinout with LTC2172-12 (65Msps) and LTC2170-12 (25Msps) - enables scalable design reuse. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing multiple receive paths in LTE/5G macrocell and small cell transceivers. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing I/Q downconverted IF signals across four antenna elements. Use Value: 71dB SNR and 90dB SFDR preserve EVM and ACLR performance; 0.15psRMS jitter minimizes phase noise impact on OFDM symbol integrity. |
Use Scenario: Reconfigurable RF front-end in military/commercial SDR platforms requiring flexible bandwidth and frequency agility. IC Role / Device Role / Timing Role: High-dynamic-range digitizer supporting multi-standard waveforms (e.g., WCDMA, LTE, WiFi) via undersampling. Use Value: 800MHz input bandwidth enables direct sampling up to L-band; serial LVDS eases FPGA interface routing in compact form factors. |
| Portable Medical Imaging | Multichannel Data Acquisition |
Use Scenario: Ultrasound beamformer front-end acquiring echo return signals from phased-array transducers. IC Role / Device Role / Timing Role: Four-channel synchronized digitizer capturing time-aligned RF echoes for real-time beam synthesis. Use Value: Simultaneous sampling eliminates inter-channel skew; ±0.3LSB INL ensures accurate amplitude mapping for B-mode imaging contrast. |
Use Scenario: High-precision test equipment capturing transient signals across multiple sensors (vibration, strain, temperature). IC Role / Device Role / Timing Role: Time-coherent ADC for synchronized multi-sensor monitoring in industrial predictive maintenance systems. Use Value: 40Msps rate captures kHz-range transients; 198mW total power enables fanless enclosure design in portable DAQ units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel, 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9286BCPZ-40 | 12-bit, 40Msps, 4-channel, but uses parallel CMOS outputs and requires 3.3V I/O supply - no LVDS serialization or integrated duty-cycle stabilizer. | Less suitable for space-constrained or high-speed FPGA interfaces where LVDS routing density matters. | Select when legacy parallel bus interface is preferred and board layout allows higher pin count and voltage translation. |
| LTC2172CUKG-12#PBF | Same pinout and feature set, but rated for 65Msps sampling - consumes 306mW at full speed and offers identical AC performance at higher rate. | Applicable where system requires headroom for future bandwidth upgrades or oversampling for noise shaping. | Select when higher sampling rate is needed without changing PCB layout; shares same footprint and register map. |
Compared with AD9286BCPZ-40, LTC2171CUKG-12#PBF reduces interface complexity via LVDS serialization and eliminates external clock conditioning; compared with LTC2172CUKG-12#PBF, it trades 25Msps lower speed for 108mW lower power at 40Msps - optimizing thermal and energy efficiency in battery-powered or thermally constrained deployments.
Availability
LTC2171CUKG-12#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging systems requiring stable component supply and long-term manufacturability.
Supply support for LTC2171CUKG-12#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 acquired Linear Technology in 2017 and continues its legacy of high-performance signal chain ICs for demanding analog-intensive applications.
The LTC217x family was designed specifically for high-dynamic-range, multichannel digitization in communications and instrumentation - emphasizing low jitter, simultaneous sampling, and flexible digital interfacing.
FAQ
What is the maximum sampling rate supported by the LTC2171CUKG-12#PBF?
The LTC2171CUKG-12#PBF is a speed-graded variant rated for 40Msps continuous sampling. This is confirmed in the "Converter Characteristics" table under "Sampling Frequency", where LTC2171-12 specifies fS = 5MHz (min) to 40MHz (max). It is not rated for 65Msps - that applies only to the LTC2172-12 variant.
Does the LTC2171CUKG-12#PBF support both differential and single-ended clock inputs?
Yes, the LTC2171CUKG-12#PBF supports both configurations. ENC+ and ENC– accept differential inputs (LVDS, PECL) or single-ended inputs (TTL, CMOS, sine wave) with ENC– tied to GND. The internal duty-cycle stabilizer remains active in both modes, ensuring consistent timing performance regardless of input duty cycle.
How does the serial LVDS output mode work on the LTC2171CUKG-12#PBF?
The LTC2171CUKG-12#PBF supports two LVDS serialization modes: 1-lane (one bit per channel per DCO edge) and 2-lane (two bits per channel per DCO edge). Mode selection is controlled by the CS pin in parallel programming mode (PAR/SER = VDD). Each channel outputs differential pairs (e.g., OUT1A+/–, OUT1B+/–), with optional on-chip 100Ω termination enabled via SDO.
What is the purpose of the VCM12 and VCM34 pins on the LTC2171CUKG-12#PBF?
VCM12 and VCM34 provide nominally VDD/2 common-mode bias voltages for the differential analog inputs of channels 1–2 and 3–4, respectively. They must be bypassed to ground with 0.1µF ceramic capacitors. These pins ensure proper input stage biasing and maximize dynamic range when using transformer- or amplifier-coupled differential inputs.
Can the LTC2171CUKG-12#PBF operate from a single 1.8V supply?
Yes, the LTC2171CUKG-12#PBF operates from a single 1.8V supply for both analog (VDD) and digital output (OVDD) domains, with specified operating range of 1.7V to 1.9V. This simplifies power design and eliminates need for separate analog/digital rails - confirmed in the "Power Requirements" section under VDD and OVDD specifications.
LTC2171CUKG-12#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:
- 12
- Sampling Rate (Per Second):
- 40M
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 4
- 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:
- -
LTC2171CUKG-12#PBF FAQ
1.How can I place an order for LTC2171CUKG-12#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2171CUKG-12#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 LTC2171CUKG-12#PBF reliable?
The price and inventory of LTC2171CUKG-12#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2171CUKG-12#PBF is usually 5 days.
3.What payment methods are accepted for LTC2171CUKG-12#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2171CUKG-12#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2171CUKG-12#PBF?
LTC2171CUKG-12#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2171CUKG-12#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 LTC2171CUKG-12#PBF?
For technical support, including LTC2171CUKG-12#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2171CUKG-12#PBF requirements.
6.How does Aetrix verify that LTC2171CUKG-12#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2171CUKG-12#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 LTC2171CUKG-12#PBF meets industry standards.
7.What is the process for return or replacement of LTC2171CUKG-12#PBF?
All LTC2171CUKG-12#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2171CUKG-12#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 LTC2171CUKG-12#PBF part is unused and in its original packaging.
Return procedure for LTC2171CUKG-12#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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