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Analog Devices Inc. DC1532A-B
- Part No.:
- DC1532A-B
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1532A-B.pdf
- Description:
- BOARD DEMO 105MSPS LTC2267-14
- Quantity:
- Payment:
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Inventory:3,363
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Product details
Overview
LTC2268-14 from Analog Devices (formerly Linear Technology) is a 14-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for high-frequency communications signal digitization. It delivers 73.1dB SNR, 88dB SFDR, and ultralow 0.15psRMS aperture jitter at 125Msps sampling rate, operating from a single 1.8V supply in a 40-pin QFN package.
For engineers reviewing the LTC2268-14 datasheet, LTC2268-14 pinout, LTC2268-14 application, or LTC2268-14 equivalent, this page provides verified technical context, real-world timing behavior, LVDS serialization modes, input range configuration options, and validated alternative ADCs for multichannel IF sampling in SDR and base station designs.
Technical Context
The LTC2268-14 integrates two independent 14-bit ADC cores with shared PLL-based clocking, enabling true simultaneous sampling critical for I/Q demodulation and beamforming. Its 800MHz full-power bandwidth sample-and-hold supports undersampling of 70–140MHz IF signals without external anti-alias filtering.
Digital output uses serial LVDS with configurable 1- or 2-lane per channel mode, supporting 12-/14-/16-bit serialization and programmable output current (1.75mA or 3.5mA). The ENC+/ENC− interface accepts differential (LVDS/PECL) or single-ended (TTL/CMOS) clocks, with an internal duty cycle stabilizer ensuring performance across 40%–60% duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full dynamic range utilization in precision measurement. |
| Sampling Rate | 125Msps - enables Nyquist sampling of signals up to 62.5MHz or undersampling of higher IF bands (e.g., 70MHz cellular LTE carriers). |
| SNR / SFDR | 73.1dB SNR and 88dB SFDR at 70MHz input - ensures clean spectral purity for demanding wireless receiver applications. |
| Aperture Jitter | 0.15psRMS - limits sampling uncertainty to <0.01° phase error at 100MHz, preserving EVM in high-order QAM systems. |
| Power Consumption | 299mW total at 125Msps (2-lane, 1.75mA mode) - enables thermally constrained multichannel boards with up to 8 channels per 1.5W. |
| Analog Input Range | Selectable 1VP-P to 2VP-P differential - matches common RF mixer outputs and simplifies front-end gain staging. |
| Supply Voltage | Single 1.8V analog (VDD) and 1.8V output (OVDD) - eliminates need for multiple supply rails and reduces BOM count. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN with exposed pad (Pin 41 = GND), RoHS-compliant, 0°C to 70°C operating range (CUJ grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1+, AIN1− | Channel 1 differential analog input | Accepts ±0.5V to ±1V input range; requires matched 100Ω termination and common-mode bias via VCM1. |
| ENC+, ENC− | Differential encode clock input | Triggers conversion on rising/falling edges; supports 1.8V LVDS, PECL, or single-ended TTL/CMOS drive. |
| OUT1A+, OUT1A− OUT1B+, OUT1B− |
Channel 1 serial LVDS data outputs | In 2-lane mode: OUT1A carries even bits, OUT1B odd bits; in 1-lane mode only OUT1A active - reduces PCB routing density. |
| DCO+, DCO− | Data clock output | Source-synchronous LVDS clock aligned to serialized data; used for FPGA capture timing with minimal skew. |
| FR+, FR− | Frame start output | Indicates start of new conversion frame; synchronizes multi-ADC alignment in time-interleaved or MIMO systems. |
| PAR/SER | Programming mode select | Ground = serial SPI control; VDD = parallel logic control (CS/SCK/SDI) - enables fast boot-time configuration without MCU dependency. |
| SENSE | Reference programming input | Configures input range: VDD → ±1V, GND → ±0.5V, external 0.625–1.3V → ±0.8×VSENSE - supports flexible signal chain scaling. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Eliminates inter-channel skew (<1ps) for coherent I/Q processing and phased-array beamforming calibration. |
| Programmable LVDS serialization | Supports 12/14/16-bit word length and 1-/2-lane modes - adapts data throughput to FPGA I/O constraints without redesign. |
| Internal clock duty cycle stabilizer | Maintains >73dB SNR with 40–60% encode clock duty cycle - relaxes clock generator requirements in compact SDR platforms. |
| Shutdown and Nap modes | Reduces power to 1mW (shutdown) or 70mW (Nap) - enables dynamic power scaling during idle periods in battery-powered test equipment. |
| Pin-compatible family | Shares footprint and pinout with LTC2267-14 (105Msps) and LTC2266-14 (80Msps) - simplifies speed-bin migration in production. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
|
Use Scenario: Digitizing 70MHz LTE FDD uplink IF signals in macrocell remote radio heads. IC Role / Device Role / Timing Role: Dual-channel ADC capturing synchronized I/Q paths with <1ps inter-channel skew for digital predistortion feedback. Use Value: 88dB SFDR prevents adjacent-channel interference masking weak signals; 0.15ps jitter maintains <2.5% EVM at 256-QAM. |
Use Scenario: Wideband spectrum monitoring from 10MHz to 6GHz using harmonic sampling architecture. IC Role / Device Role / Timing Role: High-fidelity IF sampling front-end with 800MHz S/H bandwidth enabling direct 140MHz IF capture. Use Value: 73.1dB SNR preserves low-level signal detectability; 2-lane LVDS reduces FPGA pin count by 50% vs parallel interface. |
| Portable Medical Imaging | Multichannel Data Acquisition |
|
Use Scenario: Ultrasound beamformer digitizing 10–20MHz echo return signals across 64 transducer channels. IC Role / Device Role / Timing Role: Simultaneous sampling ADC providing time-aligned samples for digital beam steering and focusing. Use Value: ±1LSB INL ensures accurate amplitude mapping of tissue interfaces; 1.8V supply minimizes thermal load in handheld units. |
Use Scenario: High-speed vibration analysis system acquiring synchronized analog inputs from 8 accelerometers. IC Role / Device Role / Timing Role: Precision dual ADC enabling phase-coherent acquisition across sensor pairs for modal analysis. Use Value: 125Msps rate captures >60kHz mechanical resonances; SPI configuration allows runtime gain/range adjustment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9250BCPZ-14 | 14-bit, 125Msps, JESD204B serial interface (not LVDS); higher 335mW power; integrated digital downconverter. | Requires FPGA with JESD204B PHY; better suited for direct RF sampling with DDC offload, not IF sampling with simple LVDS capture. | Select when system needs on-chip decimation or deterministic latency; avoid if legacy FPGA lacks JESD support. |
| LTC2267-14 | Identical pinout and architecture, but rated for 105Msps max; 243mW typical power; same 73.1dB SNR at 70MHz. | Valid drop-in replacement where 105Msps suffices (e.g., WCDMA, TD-SCDMA); lower thermal dissipation eases cooling in dense layouts. | Choose for cost-sensitive or thermally constrained deployments where 125Msps headroom is unnecessary. |
Compared with AD9250BCPZ-14 and LTC2267-14, the LTC2268-14 uniquely balances LVDS simplicity, 125Msps capability, and sub-300mW power in a pin-compatible family-making it optimal for FPGA-based IF receivers requiring minimal interface overhead and precise inter-channel coherence.
Availability
LTC2268-14 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 obsolescence management.
Supply support for LTC2268-14 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) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, communications, and industrial markets.
The LTC2268-14 belongs to Linear's ultra-low-jitter, dual-channel ADC product line designed specifically for demanding communications applications where spectral purity, sampling coherence, and power efficiency are critical.
FAQ
What is the maximum input frequency supported by the LTC2268-14 before aliasing occurs?
The LTC2268-14 has a full-power bandwidth of 800MHz and supports undersampling. With its 125Msps sampling rate, the first Nyquist zone extends to 62.5MHz-but due to the 800MHz S/H bandwidth, it can cleanly digitize IF signals up to 140MHz (e.g., 70MHz + 75MHz two-tone test) without significant roll-off or distortion. Anti-alias filtering must be applied outside the band of interest.
Does the LTC2268-14 require external reference components?
No-the LTC2268-14 includes an internal reference buffer and supports both internal and external reference configurations. When SENSE is tied to VDD or GND, the internal reference sets ±1V or ±0.5V input range respectively. For custom ranges, apply 0.625V–1.3V to SENSE; no external reference IC or resistors are needed unless higher accuracy than ±0.9% gain error is required.
How does the LTC2268-14 handle clock jitter sensitivity compared to older 14-bit ADCs?
The LTC2268-14 achieves 0.15psRMS aperture jitter-over 3× lower than prior-generation 14-bit ADCs like the AD9246. This translates to <0.3dB SNR degradation at 100MHz input, whereas older parts would lose >2dB. The result is sustained 73.1dB SNR even with moderate-quality clock sources, reducing system-level jitter cleanup complexity.
Can the LTC2268-14 operate in single-channel mode to double the effective sampling rate?
No-the LTC2268-14 is strictly a dual-channel simultaneous-sampling ADC with fixed 125Msps per channel. It does not support interleaving or time-division multiplexing to increase per-channel rate. However, its 800MHz bandwidth allows undersampling of wideband signals, effectively extending usable input spectrum beyond the Nyquist limit of each channel.
What LVDS termination options are available on the LTC2268-14?
The LTC2268-14 provides optional internal 100Ω differential termination on all LVDS output pairs (OUT1A/B, OUT2A/B, DCO, FR), enabled by driving SDO high in parallel programming mode. External 100Ω termination is also supported. Output current is selectable (1.75mA or 3.5mA) via SCK pin, allowing optimization for trace length and noise immunity without changing PCB layout.
DC1532A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Number of A/D Converters:
- 2
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 105M
- Data Interface:
- Serial LVDS
- Input Range:
- 1 ~ 2Vpp
- Power (Typ) @ Conditions:
- 266mW @ 105MSPS
- Utilized IC / Part:
- LTC2267-14
- Contents:
- Board(s)
DC1532A-B FAQ
1.How can I place an order for DC1532A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1532A-B 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 DC1532A-B reliable?
The price and inventory of DC1532A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1532A-B is usually 5 days.
3.What payment methods are accepted for DC1532A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1532A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1532A-B?
DC1532A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1532A-B 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 DC1532A-B?
For technical support, including DC1532A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1532A-B requirements.
6.How does Aetrix verify that DC1532A-B is sourced from the original manufacturer or authorized distributors?
All DC1532A-B 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 DC1532A-B meets industry standards.
7.What is the process for return or replacement of DC1532A-B?
All DC1532A-B units undergo pre-shipment inspection (PSI). If there is an issue with DC1532A-B, 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 DC1532A-B part is unused and in its original packaging.
Return procedure for DC1532A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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