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Analog Devices Inc. DC1532A-A
- Part No.:
- DC1532A-A
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1532A-A.pdf
- Description:
- BOARD DEMO 125MSPS LTC2268-14
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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, enabling undersampling of IF signals up to 800MHz full-power bandwidth in cellular base station receivers.
For engineers reviewing the LTC2268-14 datasheet, LTC2268-14 pinout, LTC2268-14 application, or LTC2268-14 equivalent, key selection criteria include its serial LVDS output architecture (1- or 2-lane per channel), 1.8V single-supply operation, ±1LSB INL, and QFN-40 package compatibility with high-density RF front-end layouts.
Technical Context
The LTC2268-14 integrates two independent 14-bit ADC cores with shared PLL-based clock conditioning and a duty-cycle stabilizer that maintains performance across wide input clock duty cycles. Its sample-and-hold stage supports 800MHz full-power bandwidth and differential analog inputs with programmable 1VP-P to 2VP-P range via SENSE pin configuration.
Digital interface uses serialized LVDS outputs with selectable 1.75mA or 3.5mA drive strength and optional internal 100Ω termination. Configuration is handled via SPI port (serial mode) or parallel logic inputs (parallel mode), supporting shutdown and nap modes for dynamic power management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - ensures monotonicity and guaranteed code coverage in precision measurement systems. |
| Sampling Rate | 125Msps - enables real-time digitization of wideband IF signals up to ~60MHz Nyquist zone in direct-conversion receivers. |
| SNR / SFDR | 73.1dB SNR and 88dB SFDR at 70MHz input - supports high-order modulation (e.g., 1024-QAM) in LTE/5G infrastructure with low error vector magnitude. |
| Aperture Jitter | 0.15psRMS - limits sampling uncertainty to <0.01° phase error at 100MHz, critical for coherent multi-antenna processing. |
| Power Dissipation | 299mW total at 125Msps, 2-lane LVDS - balances performance and thermal density in compact, air-cooled baseband modules. |
| Analog Supply | Single 1.8V (VDD = 1.7V–1.9V) - simplifies power delivery and reduces noise coupling versus dual-supply ADCs. |
| Input Bandwidth | 800MHz full-power bandwidth - allows direct sampling of L-band and S-band IF signals without external amplification or filtering. |
Pinout & Package
40-lead (6mm × 6mm) plastic QFN package with exposed pad (Pin 41 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1+, AIN1– | Channel 1 differential analog input | Accepts 1–2VP-P differential signal; common-mode bias provided by VCM1 (Pin 3). |
| ENC+, ENC– | 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– OUT1B+, OUT1B– |
LVDS serial data outputs (Ch1) | In 2-lane mode: OUT1A carries even bits, OUT1B odd bits; in 1-lane mode only OUT1A active - reduces PCB routing count. |
| DCO+, DCO– FR+, FR– |
Data clock and frame sync outputs | DCO provides bit-rate clock aligned to serialized data; FR marks start of each 14-bit word - essential for deterministic FPGA capture timing. |
| PAR/SER, CS, SCK, SDI | Mode control and SPI interface | PAR/SER selects serial (SPI) vs parallel (logic-level) configuration; enables pin-strapped setup without firmware overhead. |
| VDD, OVDD, GND, OGND | Analog/digital supply and ground | VDD (Pins 11,12,39,40) powers ADC core; OVDD (Pin 26) powers LVDS drivers; separate OGND (Pin 25) minimizes digital switching noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Serial LVDS output (1- or 2-lane) | Reduces interface pin count by >50% vs parallel CMOS, enabling compact layout and lower EMI in dense RF assemblies. |
| Programmable input range (1–2VP-P) | SENSE pin configures full-scale range without external resistors - simplifies gain staging in variable-bandwidth receivers. |
| Internal clock duty-cycle stabilizer | Maintains AC performance with ±15% clock duty cycle variation - eliminates need for external clock conditioning circuitry. |
| 6-cycle pipeline latency | Predictable, fixed delay enables deterministic timing closure in FPGA-based digital downconverters and real-time beamforming engines. |
| Shutdown and Nap modes | Reduces power to 1mW (sleep) or 70mW (nap) - supports burst-mode operation in TDD systems and battery-powered test equipment. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing 20–40MHz wide LTE/5G IF signals centered at 180–380MHz in macrocell remote radio heads. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC providing I/Q data streams synchronized to a common clock for digital downconversion. Use Value: 88dB SFDR prevents adjacent-channel interference masking weak signals; 0.15ps jitter preserves EVM under high-order modulation. |
Use Scenario: Reconfigurable wideband receiver in military comms or spectrum monitoring systems covering 10MHz–3GHz. IC Role / Device Role / Timing Role: High-dynamic-range digitizer feeding FPGA-based tunable filters and demodulators with real-time bandwidth adaptation. Use Value: 800MHz input bandwidth enables direct sampling of L/S-band without up/downconversion stages; 14-bit resolution supports >80dB spurious-free analysis. |
| Portable Medical Ultrasound | Multichannel Data Acquisition |
Use Scenario: Beamformed echo digitization in handheld ultrasound probes using 64–128 channel receive paths. IC Role / Device Role / Timing Role: Dual ADC per module acquiring time-aligned RF echoes from transducer arrays with sub-nanosecond inter-channel skew. Use Value: Simultaneous sampling eliminates time-skew-induced phase errors; ±1LSB INL ensures accurate tissue contrast quantification. |
Use Scenario: High-fidelity vibration and acoustic emission sensing in industrial predictive maintenance systems with 16+ sensor channels. IC Role / Device Role / Timing Role: Precision digitizer capturing transient mechanical events (e.g., bearing faults) with >100dB dynamic range at 100+ ksps per channel. Use Value: 73.1dB SNR resolves microvolt-level signals buried in noise; LVDS serialization eases routing across multi-board backplanes. |
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, 170Msps dual ADC with JESD204B interface; higher speed but no internal reference; requires external clock buffer. | Better suited for JESD204B-based FPGA platforms; lacks integrated duty-cycle stabilizer and programmable input range. | Select when system demands >125Msps or JESD204B lane consolidation; avoid if minimizing BOM count and layout complexity is priority. |
| LTC2267-14 | Pin-compatible 14-bit dual ADC with 105Msps max sampling rate; identical architecture and pinout; 243mW power at 105Msps. | Lower power and cost for applications where 125Msps is not required (e.g., narrowband SDR, mid-tier medical imaging). | Drop-in replacement for reduced power/thermal load where 105Msps meets system bandwidth requirements. |
Compared with AD9250BCPZ-14 and LTC2267-14, the LTC2268-14 uniquely combines 125Msps speed, integrated clock conditioning, and flexible LVDS serialization in a single 6×6mm QFN - optimizing for RF system size, power, and design simplicity without sacrificing dynamic range.
Availability
LTC2268-14 is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, and portable medical imaging requiring stable component supply with long-term production support.
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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, communications, industrial, and healthcare markets.
The LTC2268-14 belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding communications infrastructure applications where dynamic range, jitter performance, and power efficiency must coexist in space-constrained designs.
FAQ
What is the maximum input frequency supported by the LTC2268-14?
The LTC2268-14 features an 800MHz full-power bandwidth, meaning it can accurately digitize analog input signals up to 800MHz while maintaining specified SNR and SFDR performance. This enables direct undersampling of IF signals in L-band and S-band wireless infrastructure without external bandpass filtering or amplification stages. The device achieves this with a high-fidelity sample-and-hold circuit and low-noise 14-bit ADC core.
Does the LTC2268-14 require an external reference voltage?
No, the LTC2268-14 includes an internal reference and does not require an external reference unless higher precision or custom scaling is needed. The SENSE pin allows selection between internal ±1V (SENSE = VDD), ±0.5V (SENSE = GND), or an external range of ±0.8 × VSENSE (0.625V–1.3V applied to SENSE). VREF (Pin 36) outputs a nominally 1.25V buffered reference for external circuitry.
How does the serial LVDS output mode reduce PCB routing complexity for the LTC2268-14?
The LTC2268-14 supports 1-lane or 2-lane serial LVDS per channel, reducing data lines from 28 (parallel 14-bit × 2 channels) to just 4 differential pairs (2-lane) or 2 differential pairs (1-lane), plus DCO and FR. This cuts board layer count, improves signal integrity through controlled-impedance routing, and lowers EMI - especially valuable in compact RF front-end modules where space and noise isolation are critical.
What is the purpose of the PAR/SER pin on the LTC2268-14?
The PAR/SER pin on the LTC2268-14 selects between serial programming mode (PAR/SER = GND) and parallel programming mode (PAR/SER = VDD). In serial mode, CS, SCK, SDI, and SDO form an SPI interface for full register control. In parallel mode, those pins become logic inputs for simplified pin-strapped configuration - enabling rapid setup without firmware initialization, ideal for fixed-function or boot-time constrained systems.
Can the LTC2268-14 operate with a single-ended encode clock?
Yes, the LTC2268-14 supports single-ended encode clock operation: tie ENC– to GND and drive ENC+ with a 1.8V square wave, PECL, LVDS, TTL, or CMOS signal. The internal clock receiver accommodates this configuration, and the duty-cycle stabilizer remains active to maintain performance. Absolute maximum ratings specify ENC+ input voltage range as 0.2V to 3.6V relative to GND.
DC1532A-A 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):
- 125M
- Data Interface:
- Serial LVDS
- Input Range:
- 1 ~ 2Vpp
- Power (Typ) @ Conditions:
- 324mW @ 125MSPS
- Utilized IC / Part:
- LTC2268-14
- Contents:
- Board(s)
DC1532A-A FAQ
1.How can I place an order for DC1532A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1532A-A 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-A reliable?
The price and inventory of DC1532A-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1532A-A is usually 5 days.
3.What payment methods are accepted for DC1532A-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1532A-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1532A-A?
DC1532A-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1532A-A 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-A?
For technical support, including DC1532A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1532A-A requirements.
6.How does Aetrix verify that DC1532A-A is sourced from the original manufacturer or authorized distributors?
All DC1532A-A 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-A meets industry standards.
7.What is the process for return or replacement of DC1532A-A?
All DC1532A-A units undergo pre-shipment inspection (PSI). If there is an issue with DC1532A-A, 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-A part is unused and in its original packaging.
Return procedure for DC1532A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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