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Analog Devices Inc. LTC2175IUKG-12#PBF
- Part No.:
- LTC2175IUKG-12#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2175IUKG-12#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,003
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Product details
Overview
LTC2175IUKG-12#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, 125Msps quad simultaneous-sampling analog-to-digital converter in a 52-pin QFN package. It delivers 70.6dB SNR and 88dB SFDR at 70MHz input, with 0.15psRMS jitter and 800MHz full-power bandwidth-designed for undersampling IF signals in high-density communications receivers.
For engineers reviewing the LTC2175IUKG-12#PBF datasheet, LTC2175IUKG-12#PBF pinout, LTC2175IUKG-12#PBF application, or LTC2175IUKG-12#PBF equivalent, this page provides verified specifications, validated LVDS serial output timing, confirmed –40°C to +85°C industrial temperature operation, and real-world substitution guidance for multichannel SDR and medical imaging signal chains.
Technical Context
The LTC2175IUKG-12#PBF integrates four independent 12-bit ADC cores with shared clock distribution and synchronized sample-and-hold circuits, enabling true simultaneous sampling across all channels. Its internal duty cycle stabilizer supports high-performance operation over wide input clock duty cycles (2%–98%), and its serial LVDS interface operates in 1-lane (1-bit/channel) or 2-lane (2-bits/channel) mode with programmable output current (1.75mA or 3.5mA per differential pair).
Analog inputs accept differential ±1VP-P to ±2VP-P ranges with internal common-mode bias (VCM12/VCM34), while digital I/O uses 1.8V supplies (VDD/OVDD) and supports SPI configuration via CS/SCK/SDI/SDO. The device includes shutdown and nap modes (1mW and 85mW), and features internal reference (1.25V ±25ppm/°C) or external reference (0.625V–1.3V) selection via the SENSE pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature-ensures monotonicity in closed-loop control and precision measurement systems. |
| Sampling Rate | 125Msps maximum-supports Nyquist sampling of baseband signals up to 62.5MHz or undersampling of IF bands up to 140MHz. |
| SNR / SFDR | 70.6dB SNR and 88dB SFDR at 70MHz input-enables high-fidelity digitization of LTE/WCDMA carriers with minimal noise floor degradation. |
| Jitter | 0.15psRMS aperture jitter-limits sampling uncertainty to <0.01 LSB at 125Msps, critical for wideband spectral purity. |
| Power Consumption | 545mW total at 125Msps (2-lane, 3.5mA mode)-enables thermal management in dense 4-channel data acquisition modules. |
| Input Bandwidth | 800MHz full-power bandwidth-preserves signal integrity for fast-rising RF pulses and broadband radar waveforms. |
| Operating Temperature | –40°C to +85°C (industrial grade)-validated for deployment in outdoor base stations and portable diagnostic equipment. |
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 performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1+ / AIN1– (Pins 1,2) | Channel 1 differential analog input | Accepts 1VP-P to 2VP-P differential signal; referenced to VCM12 for optimal common-mode rejection. |
| VCM12 (Pin 3) | Common-mode bias for Ch1/Ch2 | Nominally VDD/2; must be bypassed with 0.1µF capacitor to ground to stabilize input common-mode voltage. |
| ENC+ / ENC– (Pins 17,18) | Differential encode clock input | Triggers conversion on both edges; supports PECL/LVDS/TTL/CMOS; internal duty cycle stabilizer enables robust timing. |
| OUT1A+/OUT1A– (Pins 35,36) | LVDS serial data output (Ch1, Lane A) | 2-lane mode: outputs MSB/LSB pairs; 1-lane mode: outputs sequential bits; configurable 1.75mA/3.5mA drive strength. |
| FR+/FR– (Pins 37,38) | Frame clock output | Indicates start of new sample frame; period equals two encode cycles in 2-lane mode-synchronizes downstream FPGA capture logic. |
| PAR/SER (Pin 47) | Programming mode select | Ground = serial SPI mode; VDD = parallel pin-strapped mode-determines whether CS/SCK/SDI configure device or select output format. |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Four independent ADCs share single clock and reference-eliminates inter-channel skew for coherent beamforming and phase-sensitive measurements. |
| Serial LVDS interface | Reduces interface pins by >60% vs parallel CMOS; 2-lane mode cuts data lines to 8 (4×2) while maintaining 125Msps throughput. |
| Configurable input range | 1VP-P to 2VP-P differential range selected via REFH/REFL-optimizes dynamic range for varying signal amplitudes without external gain stages. |
| Internal clock duty cycle stabilizer | Compensates for asymmetric encode clocks-enables use of low-cost crystal oscillators or FPGA-generated clocks without SNR penalty. |
| SPI and pin-strapped programming | Full register access via serial interface or hardware pin settings-supports factory programming and field reconfiguration without firmware dependency. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
|
Use Scenario: Digitizing multiple 20MHz LTE carrier bands simultaneously in remote radio heads. IC Role / Device Role: Quad-channel IF sampling ADC capturing four adjacent 0–100MHz IF streams at 125Msps. Use Value: 88dB SFDR prevents intermodulation distortion between adjacent carriers; simultaneous sampling preserves phase coherence for MIMO antenna processing. |
Use Scenario: Real-time spectrum analysis and adaptive waveform generation in field-deployable SDR platforms. IC Role / Device Role: High-speed digitizer front-end feeding FPGA-based digital downconverters and FFT engines. Use Value: 0.15psRMS jitter ensures <1° phase error at 100MHz, enabling accurate direction-of-arrival estimation and narrowband interference nulling. |
| Portable Medical Imaging | Multichannel Data Acquisition |
|
Use Scenario: Ultrasound beamformer receiving echo signals from 64+ transducer elements in handheld scanners. IC Role / Device Role: Four-channel ADC digitizing time-aligned RF echoes from quadrature-received sub-arrays. Use Value: 70.6dB SNR preserves contrast resolution for tissue differentiation; 800MHz bandwidth captures harmonics essential for contrast-enhanced imaging. |
Use Scenario: High-precision vibration monitoring of rotating machinery using synchronized multi-sensor analog inputs. IC Role / Device Role: Simultaneous sampling of four accelerometer or strain gauge channels with shared timing reference. Use Value: No missing codes and ±0.3LSB INL ensure traceable amplitude accuracy for ISO 10816-3 compliance reporting; nap mode reduces power during idle intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel, 12-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BSTZ-125 | 12-bit, 125Msps quad ADC with JESD204B interface; higher power (750mW); no internal reference; requires external clock buffer. | Targets JESD204B-based FPGA platforms; lacks integrated duty cycle stabilizer and serial LVDS simplicity. | Select when system uses JESD204B PHY and requires deterministic latency; avoid if minimizing board area and BOM count is critical. |
| LTC2173IUKG-12#PBF | Same pinout and architecture, but rated for 80Msps max; lower power (369mW); identical –40°C to +85°C rating and LVDS serialization options. | Used where 80Msps suffices (e.g., narrowband comms, lower-frequency ultrasound); same PCB layout but reduced thermal load. | Select for cost-optimized or thermally constrained designs where 125Msps is unnecessary; drop-in replacement with no layout change. |
Compared with AD9257BSTZ-125, LTC2175IUKG-12#PBF offers simpler LVDS interfacing and integrated clock conditioning, reducing FPGA I/O count and external component count; compared with LTC2173IUKG-12#PBF, it delivers 56% higher sampling rate at only 47% higher power, enabling wider instantaneous bandwidth without changing thermal design.
Availability
LTC2175IUKG-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 across extended temperature ranges and long production lifecycles.
Supply support for LTC2175IUKG-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, 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 LTC2175IUKG-12#PBF belongs to ADI's high-speed data converter product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous multichannel sampling, low jitter, and compact serial interfaces.
FAQ
What is the maximum sampling rate supported by the LTC2175IUKG-12#PBF?
The LTC2175IUKG-12#PBF supports a maximum sampling rate of 125Msps, as specified in its speed grade designation "-12" and confirmed in the Absolute Maximum Ratings and Timing Characteristics tables. This rate is achievable in both 1-lane and 2-lane LVDS output modes, provided the serial data rate does not exceed 1000Mbps and tSER ≥ 1ns.
Does the LTC2175IUKG-12#PBF require an external reference voltage?
No-the LTC2175IUKG-12#PBF includes an internal 1.25V reference with ±25ppm/°C drift, usable directly for most applications. An external reference (0.625V–1.3V) may be applied to the SENSE pin for improved accuracy or custom scaling, but it is optional-not required for basic operation of the LTC2175IUKG-12#PBF.
How many LVDS data lanes does the LTC2175IUKG-12#PBF support, and how are they configured?
The LTC2175IUKG-12#PBF supports two LVDS output configurations: 2-lane mode (two bits per channel per clock edge, using OUTxA/OUTxB pairs) and 1-lane mode (one bit per channel per clock edge, using only OUTxA outputs). Configuration is controlled by the PAR/SER pin and CS/SCK pins in parallel or serial programming mode, respectively.
What is the operating temperature range of the LTC2175IUKG-12#PBF?
The LTC2175IUKG-12#PBF is rated for an industrial operating temperature range of –40°C to +85°C, as indicated by the "I" suffix in the part number and confirmed in the Order Information table. This range is validated across all AC and DC specifications, including SNR, SFDR, and INL/DNL performance.
Can the LTC2175IUKG-12#PBF interface directly with a Xilinx FPGA without level-shifting?
Yes-the LTC2175IUKG-12#PBF's LVDS outputs comply with ANSI TIA/EIA-644-A standards and operate at 1.8V OVDD, matching standard FPGA LVDS I/O banks (e.g., Xilinx 7-series HP bank with VCCO = 1.8V). No level-shifting is required when interfacing the LTC2175IUKG-12#PBF with compatible FPGA inputs.
LTC2175IUKG-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):
- 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-12#PBF FAQ
1.How can I place an order for LTC2175IUKG-12#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2175IUKG-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 LTC2175IUKG-12#PBF reliable?
The price and inventory of LTC2175IUKG-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 LTC2175IUKG-12#PBF is usually 5 days.
3.What payment methods are accepted for LTC2175IUKG-12#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2175IUKG-12#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2175IUKG-12#PBF?
LTC2175IUKG-12#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2175IUKG-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 LTC2175IUKG-12#PBF?
For technical support, including LTC2175IUKG-12#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2175IUKG-12#PBF requirements.
6.How does Aetrix verify that LTC2175IUKG-12#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2175IUKG-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 LTC2175IUKG-12#PBF meets industry standards.
7.What is the process for return or replacement of LTC2175IUKG-12#PBF?
All LTC2175IUKG-12#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2175IUKG-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 LTC2175IUKG-12#PBF part is unused and in its original packaging.
Return procedure for LTC2175IUKG-12#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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