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Analog Devices Inc. LTC2175CUKG-14#PBF
- Part No.:
- LTC2175CUKG-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2175CUKG-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,114
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Product details
Overview
LTC2175CUKG-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 125Msps quad simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range RF/IF digitization. It delivers 73.1dB SNR, 88dB SFDR, and ultralow 0.15psRMS jitter at full speed, enabling undersampling of 70–140MHz IF signals in cellular base stations and software-defined radios.
For engineers reviewing the LTC2175CUKG-14#PBF datasheet, LTC2175CUKG-14#PBF pinout, LTC2175CUKG-14#PBF application, or LTC2175CUKG-14#PBF equivalent, this page provides verified package mapping (52-pin QFN), confirmed LVDS serialization modes (1-/2-lane), validated input range selection (1–2VP-P), and real-world performance data including crosstalk (–90dBc near-channel), pipeline latency (6 cycles), and power consumption (558mW total at 125Msps).
Technical Context
The LTC2175CUKG-14#PBF integrates four independent 14-bit ADC cores with shared sample-and-hold (800MHz full-power bandwidth) and a duty-cycle-stabilized differential encode interface. Its serial LVDS outputs support programmable 1.75mA/3.5mA drive strength and internal 100Ω termination, reducing PCB routing complexity versus parallel-output ADCs.
It features dual reference options (internal 1.25V ±25ppm/°C or external 0.625–1.3V), SPI-configurable serialization (12-/14-/16-bit per lane), and low-power states (85mW Nap, 1mW Sleep). Channel matching is specified at ±0.2%FS gain and ±3mV offset over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision measurement systems. |
| Sampling Rate | 125Msps maximum - supports Nyquist sampling of up to 62.5MHz baseband or undersampling of 70–140MHz IF bands. |
| SNR / SFDR | 73.1dB SNR and 88dB SFDR at 70MHz input - enables high-fidelity signal capture in demanding comms receivers. |
| Input Bandwidth | 800MHz full-power bandwidth - preserves signal integrity for wideband RF inputs without external filtering penalties. |
| Power Consumption | 558mW total at 125Msps (140mW/channel) - achieves high-speed performance with single 1.8V supply, simplifying power delivery. |
| Jitter | 0.15psRMS aperture jitter - minimizes noise floor degradation when undersampling high-frequency signals. |
| Supply Voltage | 1.8V analog (VDD) and 1.8V output (OVDD) - eliminates need for multiple supply rails and reduces board-level complexity. |
Pinout & Package
Package: 52-lead (7mm × 8mm) plastic QFN with exposed pad (Pin 53 = GND), rated for 0°C to 70°C operation.
| 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 provided by VCM12 (Pin 3). |
| ENC+ / ENC– (Pins 17, 18) | Differential encode clock input | Triggers conversion on both edges; supports sine wave, PECL, LVDS, TTL, or CMOS drive with internal duty-cycle stabilization. |
| OUT1A+/OUT1A– (Pins 41, 42) | LVDS data output lane A, Channel 1 | Serial 2-bit output in 2-lane mode; configurable for 1-/2-lane operation via CS/SCK in parallel programming mode. |
| FR+/FR– (Pins 27, 28) | LVDS frame clock output | Indicates start of new sample frame; period equals two encode cycles in 2-lane mode. |
| PAR/SER (Pin 47) | Programming mode select | Ground = serial SPI interface (CS/SCK/SDI/SDO); VDD = parallel logic control (CS/SCK/SDI/SDO as GPIO). |
| SENSE (Pin 50) | Reference and input range programming | Determines input range: VDD = ±1V, GND = ±0.5V, external 0.625–1.3V = ±0.8×VSENSE. |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Enables coherent multichannel acquisition for beamforming, MIMO, or phase-sensitive instrumentation without inter-channel skew. |
| Serial LVDS interface (1-/2-lane) | Reduces digital I/O count from 56 (parallel) to 8–16 pins, easing high-speed layout and lowering EMI in dense RF assemblies. |
| Programmable LVDS output current | 1.75mA or 3.5mA per differential pair - allows optimization of signal integrity vs. power across varying trace lengths and loads. |
| Internal clock duty-cycle stabilizer | Maintains <±10% duty cycle tolerance - ensures consistent sampling aperture timing even with asymmetric clock sources. |
| Configurable power modes | Nap (85mW) and Sleep (1mW) states enable rapid wake-up for burst-mode operation in battery-powered SDR or portable test equipment. |
| On-chip 100Ω LVDS termination | Eliminates need for external termination resistors - saves board space and improves impedance matching consistency across channels. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
|
Use Scenario: Digitizing multiple 20–40MHz LTE/5G NR carrier bands simultaneously in remote radio units. IC Role / Device Role / Timing Role: Quad-channel IF sampling ADC with synchronized capture across all four receivers for channel bonding and interference cancellation. Use Value: 88dB SFDR prevents adjacent-channel leakage from masking weak signals; 0.15psRMS jitter maintains EVM <1.5% at 256-QAM. |
Use Scenario: Real-time spectrum analysis and adaptive waveform generation in field-deployable military/commercial SDR platforms. IC Role / Device Role / Timing Role: High-fidelity front-end digitizer supporting reconfigurable bandwidth (5–140MHz) and dynamic range scaling via SENSE pin. Use Value: 73.1dB SNR enables detection of –120dBm signals in presence of +10dBm blockers; 125Msps rate supports 60MHz instantaneous bandwidth. |
| Portable Medical Imaging | Multichannel Data Acquisition |
|
Use Scenario: Ultrasound beamformer digitizing echo returns from 64+ transducer elements in handheld imaging probes. IC Role / Device Role / Timing Role: Low-power, time-coherent quad ADC capturing RF echoes with matched gain/offset across channels for synthetic aperture processing. Use Value: ±0.2%FS gain matching and ±3mV offset matching ensure <0.1dB amplitude error across channels; 558mW total power enables battery operation. |
Use Scenario: High-precision vibration monitoring in industrial predictive maintenance systems using multi-axis accelerometer arrays. IC Role / Device Role / Timing Role: Simultaneous sampling of four sensor channels with 14-bit resolution and 800MHz input bandwidth for transient event capture. Use Value: 1.2LSBRMS transition noise and no missing codes preserve fidelity of microsecond-scale shock pulses; SPI configuration enables runtime calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9694BCPZ-1300 | 14-bit, 1.3Gsps, JESD204B interface, higher power (2.4W), 72dB SNR at 1GHz input | Targets mmWave 5G and radar requiring >1Gsps; incompatible pinout and interface protocol | Select for >1Gsps sampling; avoid for cost-sensitive, low-power, LVDS-based designs. |
| LTC2173CUKG-14#PBF | Same family, 80Msps, 376mW, identical pinout and register map, lower SNR (72.6dB at 70MHz) | Drop-in replacement for lower-speed applications where 125Msps headroom is unnecessary | Choose for power-constrained systems needing same footprint and firmware compatibility at reduced speed. |
Compared with AD9694BCPZ-1300, LTC2175CUKG-14#PBF offers superior power efficiency (558mW vs. 2400mW) and LVDS simplicity but lacks JESD204B scalability; compared with LTC2173CUKG-14#PBF, it delivers 45Msps higher throughput and 0.5dB better SNR at the cost of +182mW power, making it optimal for mid-band 5G and SDR front ends.
Availability
LTC2175CUKG-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2175CUKG-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 communications, industrial, automotive, and healthcare markets.
The LTC2175CUKG-14#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for RF/IF digitization in communications infrastructure and instrumentation where dynamic range, jitter, and multichannel coherence are critical.
FAQ
What is the maximum sampling rate supported by the LTC2175CUKG-14#PBF?
The LTC2175CUKG-14#PBF supports a maximum sampling rate of 125Msps, as confirmed in its Absolute Maximum Ratings and Dynamic Accuracy specifications. This rate is achievable with 2-lane LVDS serialization and 1.8V supplies. At 125Msps, the device maintains 73.1dB SNR and 88dB SFDR at 70MHz input frequency, making it suitable for high-bandwidth IF sampling applications. Lower rates (e.g., 105Msps or 80Msps) correspond to the pin-compatible LTC2174 and LTC2173 variants.
Does the LTC2175CUKG-14#PBF support both internal and external voltage references?
Yes, the LTC2175CUKG-14#PBF supports both internal and external reference configurations. The SENSE pin (Pin 50) selects the mode: tied to VDD enables the internal 1.25V reference with ±25ppm/°C drift and ±1V input range; tied to GND selects ±0.5V range; applying 0.625–1.3V to SENSE configures an external reference with ±0.8×VSENSE input range. Internal reference specs include 1.225–1.275V output and 7Ω output resistance.
How many LVDS data lanes does the LTC2175CUKG-14#PBF use, and how is serialization configured?
The LTC2175CUKG-14#PBF supports both 1-lane and 2-lane LVDS serialization modes. In 2-lane mode, each channel outputs two bits per sample (e.g., OUT1A+/OUT1A– and OUT1B+/OUT1B–), reducing interface width. In 1-lane mode, only OUT1A+/OUT1A– is active per channel, halving data rate but simplifying routing. Mode selection is controlled via the CS pin in parallel programming mode (PAR/SER = VDD), with SCK setting output current.
What power-saving modes are available on the LTC2175CUKG-14#PBF, and what are their typical power draws?
The LTC2175CUKG-14#PBF offers Nap Mode (85mW) and Sleep Mode (1mW), both accessible via SPI register writes or parallel control pins. Nap Mode retains configuration and enables fast wake-up (<1µs), while Sleep Mode shuts down most circuitry for minimal quiescent draw. Full operation consumes 558mW at 125Msps (2-lane, 1.75mA mode), with analog (283mA) and digital (27mA) supply currents separately specified.
Is the LTC2175CUKG-14#PBF pin-compatible with other members of the LTC217x-14 family?
Yes, the LTC2175CUKG-14#PBF is pin-compatible with the LTC2174CUKG-14#PBF and LTC2173CUKG-14#PBF, sharing identical 52-pin QFN packaging, pin functions, and register maps. This allows hardware reuse across speed grades (125/105/80Msps) and simplifies design migration. Differences are limited to AC performance (e.g., SNR degrades from 73.1dB to 72.6dB to 72.5dB) and power (558mW → 450mW → 376mW), with no changes to pinout or interface logic.
LTC2175CUKG-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:
- 0°C ~ 70°C
- Supplier Device Package:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2175CUKG-14#PBF FAQ
1.How can I place an order for LTC2175CUKG-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2175CUKG-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 LTC2175CUKG-14#PBF reliable?
The price and inventory of LTC2175CUKG-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 LTC2175CUKG-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2175CUKG-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2175CUKG-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2175CUKG-14#PBF?
LTC2175CUKG-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2175CUKG-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 LTC2175CUKG-14#PBF?
For technical support, including LTC2175CUKG-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2175CUKG-14#PBF requirements.
6.How does Aetrix verify that LTC2175CUKG-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2175CUKG-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 LTC2175CUKG-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2175CUKG-14#PBF?
All LTC2175CUKG-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2175CUKG-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 LTC2175CUKG-14#PBF part is unused and in its original packaging.
Return procedure for LTC2175CUKG-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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