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Analog Devices Inc. LTC2175IUKG-14#PBF
- Part No.:
- LTC2175IUKG-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2175IUKG-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,686
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Product details
Overview
LTC2175IUKG-14#PBF from Analog Devices (acquired Linear Technology) is a 14-bit, 125Msps quad-channel simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range RF/IF digitization. It delivers 73.1dB SNR, 88dB SFDR, and 0.15psRMS jitter at full speed, with serial LVDS outputs, 1.8V single supply, and 800MHz full-power bandwidth - deployed in cellular base stations and software-defined radios.
For engineers reviewing the LTC2175IUKG-14#PBF datasheet, LTC2175IUKG-14#PBF pinout, LTC2175IUKG-14#PBF application, or LTC2175IUKG-14#PBF equivalent, key selection criteria include guaranteed ±1LSB INL over –40°C to +85°C, 2-lane/1-lane LVDS serialization flexibility, differential or single-ended clock support, and validated performance at 70MHz/140MHz input frequencies with external reference configuration.
Technical Context
The LTC2175IUKG-14#PBF integrates four independent 14-bit ADC cores with shared sample-and-hold and internal clock duty cycle stabilizer, enabling undersampling of IF signals up to 140MHz while maintaining 73dB SNR. Its architecture supports both internal (1.25V) and external (0.625V–1.3V) reference modes, with programmable input range (1–2VP-P) and selectable LVDS output current (1.75mA/3.5mA).
Digital interface includes SPI-configurable mode control and parallel programming via CS/SCK/SDI pins, with optional on-chip 100Ω LVDS termination enabled by SDO. The device implements shutdown and nap modes (1mW/85mW), and features channel-to-channel crosstalk < –90dBc (near) and < –105dBc (far), critical for multichannel coherent sampling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - ensures monotonicity and full code coverage in precision measurement. |
| Sampling Rate | 125Msps maximum - supports Nyquist sampling of signals up to 62.5MHz or undersampling of IF bands up to 140MHz. |
| SNR / SFDR | 73.1dB SNR and 88dB SFDR at 70MHz input - enables high-fidelity digitization in wideband communications receivers. |
| Jitter | 0.15psRMS aperture jitter - minimizes noise floor degradation when sampling high-frequency analog inputs. |
| Power Dissipation | 558mW total at 125Msps (2-lane, 1.75mA mode) - balances performance and thermal management in dense RF front-ends. |
| Input Bandwidth | 800MHz full-power bandwidth - preserves signal integrity for fast-rising RF transients without attenuation. |
| Operating Temp | –40°C to +85°C industrial grade - qualified for deployment in outdoor base station and portable medical environments. |
Pinout & Package
52-pin (7mm × 8mm) plastic QFN package with exposed pad (Pin 53 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity. Pin pitch is 0.5mm; recommended reflow profile per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1+ / AIN1– (Pins 1,2) | Channel 1 differential analog input | Accepts 1–2VP-P differential signal; common-mode bias set by VCM12 (Pin 3). |
| ENC+ / ENC– (Pins 17,18) | Differential encode clock input | Supports sine wave, PECL, LVDS, TTL, or CMOS; internal duty cycle stabilizer maintains timing accuracy. |
| OUT1A+/OUT1A– (Pins 35,36) | LVDS data output lane A, Channel 1 | Serial 2-bit output per conversion cycle; configurable 1.75mA/3.5mA drive strength and internal 100Ω termination. |
| FR+/FR– (Pins 39,40) | LVDS frame clock output | Indicates start of new conversion frame; period equals two encode cycles in 2-lane mode. |
| PAR/SER (Pin 47) | Programming mode select | Ground = serial SPI interface; VDD = parallel logic control of output mode, current, and power states. |
| SENSE (Pin 50) | Reference and input range programming | Configures ±1V (VDD), ±0.5V (GND), or ±0.8×VSENSE (external 0.625–1.3V) input range. |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Enables phase-coherent multichannel acquisition for beamforming and MIMO systems without inter-channel skew. |
| Serial LVDS interface (1/2-lane) | Reduces PCB trace count by >50% vs parallel CMOS; supports 1000Mbps max data rate with adjustable output swing. |
| Internal clock duty cycle stabilizer | Maintains <±10% duty cycle tolerance across process/voltage/temperature - eliminates need for external clock conditioning. |
| Programmable input range & reference | Single-pin SENSE control selects 1VP-P to 2VP-P full-scale range with internal or external reference - simplifies system-level gain staging. |
| Low-power sleep/nap modes | 1mW sleep and 85mW nap modes enable rapid wake-up in burst-mode receivers while minimizing idle power consumption. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) |
|---|---|
|
Use Scenario: Digitizing multiple 20MHz LTE carriers within a 100MHz instantaneous bandwidth in macrocell remote radio heads. IC Role / Device Role / Timing Role: Quad-channel ADC captures I/Q pairs from quadrature downconverters with sub-1ps inter-channel skew for digital beamforming. Use Value: 88dB SFDR prevents adjacent-channel interference; 73.1dB SNR supports 16-QAM/64-QAM demodulation at –1dBFS input. |
Use Scenario: Reconfigurable wideband receiver in military/commercial SDR platforms supporting HF to 2GHz tuning ranges. IC Role / Device Role / Timing Role: Simultaneous sampling front-end enabling real-time spectrum analysis and adaptive waveform processing across four independent channels. Use Value: 800MHz input bandwidth and 0.15psRMS jitter allow clean undersampling of 70MHz/140MHz IF signals without external filtering. |
| Portable Ultrasound Imaging | Multichannel Data Acquisition |
|
Use Scenario: Beamformed echo digitization in handheld ultrasound systems with 64+ element transducer arrays. IC Role / Device Role / Timing Role: Four synchronized ADCs acquire RF echo returns from adjacent transducer groups for real-time B-mode image reconstruction. Use Value: ±1LSB INL over –40°C to +85°C ensures grayscale linearity across operating temperature; low 1.2LSBRMS transition noise improves contrast resolution. |
Use Scenario: High-precision vibration monitoring in industrial predictive maintenance systems using multi-axis accelerometer inputs. IC Role / Device Role / Timing Role: Simultaneous capture of four sensor channels (e.g., x/y/z acceleration + temperature) with deterministic latency for time-of-arrival analysis. Use Value: 6-cycle pipeline latency and FR+/FR– frame sync enable precise timestamp alignment across channels without FPGA-based deskewing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel, 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9694BCPZ-1300 | 14-bit, 1.3GSPS quad ADC with JESD204B interface; higher speed but 2.5× power (1.4W); no internal reference. | Targets mmWave 5G massive MIMO where JESD204B backhaul is required; not drop-in compatible due to interface and pinout differences. | Select AD9694BCPZ-1300 only when >1GSPS sampling or JESD204B SerDes integration is mandatory; requires redesign of digital interface and layout. |
| LTC2174IUKG-14#PBF | Pin-compatible 14-bit quad ADC with 105Msps max rate; identical package, pinout, and feature set - differs only in speed grade and power (450mW @ 105Msps). | Suitable for cost-sensitive or lower-bandwidth applications (e.g., narrowband IoT gateways) where 125Msps headroom is unnecessary. | LTC2174IUKG-14#PBF is a direct speed-binned alternative; same PCB layout and firmware - ideal for design margin optimization or BOM rationalization. |
Compared with LTC2175IUKG-14#PBF, the LTC2174IUKG-14#PBF offers identical functionality at reduced speed and power, while the AD9694BCPZ-1300 provides higher throughput at significantly increased complexity and power - making LTC2175IUKG-14#PBF the optimal balance of RF performance, integration, and thermal efficiency for 100–200MHz IF digitization.
Availability
LTC2175IUKG-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, and portable medical imaging applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for LTC2175IUKG-14#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 aerospace, industrial, automotive, and communications markets.
The LTC2175IUKG-14#PBF belongs to ADI's high-speed data converter product line, engineered specifically for demanding RF/IF digitization in wireless infrastructure and instrumentation - emphasizing low jitter, high SFDR, and multichannel coherence.
FAQ
What is the guaranteed integral nonlinearity (INL) specification for LTC2175IUKG-14#PBF over temperature?
The LTC2175IUKG-14#PBF guarantees ±1.2LSB typical and ±4.1LSB maximum integral nonlinearity over its full –40°C to +85°C operating range, measured with differential analog input and internal reference. This ensures monotonic transfer function and accurate amplitude fidelity in precision measurement systems where code-to-code linearity is critical.
Does LTC2175IUKG-14#PBF support single-ended clock input, and what are the voltage requirements?
Yes, LTC2175IUKG-14#PBF supports single-ended encode input: tie ENC– (Pin 18) to GND and drive ENC+ (Pin 17) with a 1.8V square wave. Input voltage thresholds are VIH = 1.2V and VIL = 0.6V at VDD = 1.8V, with 3.5pF input capacitance and 30kΩ input resistance - compatible with standard 1.8V CMOS logic drivers.
How does the SENSE pin configure input range on LTC2175IUKG-14#PBF, and what external reference voltages are supported?
The SENSE pin (Pin 50) configures LTC2175IUKG-14#PBF input range: connect to VDD for ±1V range, to GND for ±0.5V range, or apply 0.625V–1.3V for ±0.8×VSENSE range. External references must be stable, low-noise, and capable of sourcing/sinking ±6µA leakage current - enabling flexible gain scaling without external op-amp circuitry.
What LVDS serialization modes does LTC2175IUKG-14#PBF support, and how is mode selected?
LTC2175IUKG-14#PBF supports both 1-lane (1-bit per channel) and 2-lane (2-bit per channel) LVDS serialization, selected via the CS pin in parallel programming mode (PAR/SER = VDD). 2-lane mode operates at half the data rate per lane, reducing EMI and easing PCB routing; 1-lane mode halves pin count but doubles per-lane data rate - configurable without firmware update.
Is LTC2175IUKG-14#PBF pin-compatible with other members of the LTC217x-14 family, and what are the implications for design reuse?
Yes, LTC2175IUKG-14#PBF is fully pin-compatible with LTC2174IUKG-14#PBF and LTC2173IUKG-14#PBF in the same 52-pin QFN package. This allows direct substitution based on speed/power trade-offs (125/105/80Msps) without PCB changes - enabling scalable platform designs where performance requirements evolve across product tiers.
LTC2175IUKG-14#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:
- 14
- Sampling Rate (Per Second):
- 125M
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2175IUKG-14#PBF FAQ
1.How can I place an order for LTC2175IUKG-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2175IUKG-14#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 LTC2175IUKG-14#PBF reliable?
The price and inventory of LTC2175IUKG-14#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2175IUKG-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2175IUKG-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2175IUKG-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2175IUKG-14#PBF?
LTC2175IUKG-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2175IUKG-14#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 LTC2175IUKG-14#PBF?
For technical support, including LTC2175IUKG-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2175IUKG-14#PBF requirements.
6.How does Aetrix verify that LTC2175IUKG-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2175IUKG-14#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 LTC2175IUKG-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2175IUKG-14#PBF?
All LTC2175IUKG-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2175IUKG-14#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 LTC2175IUKG-14#PBF part is unused and in its original packaging.
Return procedure for LTC2175IUKG-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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