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Analog Devices Inc. DC1370A-F
- Part No.:
- DC1370A-F
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1370A-F.pdf
- Description:
- BOARD DEMO 25MSPS LTC2256-14
- Quantity:
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Product details
Overview
LTC2258-14 from Analog Devices (formerly Linear Technology) is a 14-bit, 65Msps ultra-low-power analog-to-digital converter optimized for high-dynamic-range signal digitization in RF and IF sampling applications. It delivers 74dB SNR, 88dB SFDR, and 0.17psRMS aperture jitter with single 1.8V supply, CMOS/DDR-CMOS/DDR-LVDS outputs, and 800MHz full-power bandwidth - enabling undersampling of cellular and SDR IF signals up to 140MHz.
For engineers reviewing the LTC2258-14 datasheet, LTC2258-14 pinout, LTC2258-14 application, or LTC2258-14 equivalent, this page provides verified technical context, validated pin functions across all output modes, real-world performance trade-offs between CMOS and LVDS interfaces, and confirmed alternatives for 14-bit, 65Msps ADC replacement in communications and medical imaging systems.
Technical Context
The LTC2258-14 employs a pipelined ADC architecture with integrated sample-and-hold, correction logic, and configurable digital output drivers. Its ENC+/ENC– differential clock interface supports sine, PECL, LVDS, TTL, or CMOS inputs, and optional duty cycle stabilization ensures full-speed performance across wide input duty cycles.
It features dual reference options (internal 1.25V ±25ppm/°C or external 0.625V–1.3V), programmable input range (1–2VP-P), and serial SPI configuration via PAR/SER-controlled mode. Power management includes Nap (9mW) and Sleep (0.5mW) modes, while pipeline latency is fixed at 5.0 cycles in full-rate CMOS mode and 5.5 cycles in DDR modes.
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 acquisition. |
| Sampling Rate | 65Msps maximum - supports real-time digitization of wideband IF signals up to 140MHz using undersampling. |
| SNR / SFDR | 74dB SNR and 88dB SFDR at 70MHz input - enables high-fidelity reception in multi-carrier cellular base stations. |
| Aperture Jitter | 0.17psRMS - limits noise floor degradation when sampling GHz-range RF signals via harmonic mixing. |
| Power Consumption | 81mW at 65Msps (CMOS mode, OVDD=1.2V) - allows thermal-constrained portable medical imaging front-ends. |
| Analog Input BW | 800MHz full-power bandwidth - accommodates direct sampling of L-band and S-band RF signals without external amplification. |
| Digital Interface | Configurable CMOS / DDR-CMOS / DDR-LVDS outputs - enables flexible FPGA interfacing with voltage- and timing-matched data capture. |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package (UJ) with exposed GND pad (Pin 41) requiring PCB soldering for thermal and electrical integrity. Pin functions are consistent across output modes except for D[0–13], OF, CLKOUT±, and data pair terminals (e.g., D0_1, D12_13, D0_1±).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts 1–2VP-P signal with 800MHz bandwidth; common-mode bias set by VCM (Pin 37) at VDD/2 ±25mV. |
| ENC+, ENC– | Differential encode clock input | Triggers conversion on rising/falling edges; supports 0.2–3.6V input range and internal/external common-mode setting. |
| VDD (Pins 9,10,40) | Analog power supply | 1.7–1.9V operation; requires local 0.1µF ceramic bypass per pin to minimize supply-induced jitter. |
| OVDD (Pin 26) | Digital output supply | 1.1–1.9V for CMOS outputs (1.2/1.5/1.8V supported); 1.7–1.9V for LVDS - sets output swing and termination compliance. |
| PAR/SER (Pin 8) | Programming mode select | Ground = serial SPI control (CS/SCK/SDI/SDO active); VDD = parallel mode (CS/SCK/SDI repurposed for function control). |
| REFH/REFL (Pins 4–7) | Reference voltage terminals | Form mid-scale reference divider; require 2.2µF + 0.1µF ceramic bypass to ground for stable 1.25V internal reference. |
| SENSE (Pin 39) | Reference programming input | Connect to VDD → ±1V input range; to GND → ±0.5V; to 0.625–1.3V → ±0.8× applied voltage - enables precise gain calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-jitter sampling | 0.17psRMS aperture jitter enables clean undersampling of 100+ MHz IF signals without SNR penalty. |
| Multi-output interface | Hardware-selectable CMOS / DDR-CMOS / DDR-LVDS outputs reduce FPGA I/O constraints and EMI in dense layouts. |
| Programmable input range | 1–2VP-P differential range selection via SENSE pin simplifies front-end amplifier design across multiple signal chain variants. |
| Low-power sleep states | 9mW Nap mode and 0.5mW Sleep mode allow rapid power cycling in battery-powered portable medical devices. |
| Integrated clock conditioning | On-chip duty cycle stabilizer maintains >50% duty cycle tolerance - eliminates need for external clock retiming in PLL-based systems. |
| Serial configuration port | SPI interface (via PAR/SER=0) enables runtime reconfiguration of randomizer, output format, and power modes without reset. |
Applications
| Cellular Base Station Receiver | Software Defined Radio (SDR) Front-End |
|---|---|
|
Use Scenario: Digitizing 70–140MHz IF signals from multi-carrier GSM/LTE transceivers in macrocell BTS. IC Role / Device Role / Timing Role: High-SNR, high-SFDR ADC capturing wide instantaneous bandwidth with minimal spurious content. Use Value: 88dB SFDR suppresses adjacent-channel interference; 65Msps rate supports 2× oversampling of 20MHz LTE carriers. |
Use Scenario: Reconfigurable RF sampling in military/commercial SDR platforms operating across HF–2GHz bands. IC Role / Device Role / Timing Role: Flexible IF-sampling ADC with programmable input range and output interface for FPGA-based demodulation. Use Value: SENSE pin enables dynamic input scaling; DDR-LVDS output reduces FPGA pin count and timing closure complexity. |
| Portable Ultrasound Imaging | Multi-Channel Data Acquisition System |
|
Use Scenario: Time-domain beamforming in handheld ultrasound units digitizing 5–15MHz echo returns from piezoelectric transducers. IC Role / Device Role / Timing Role: Low-power, high-linearity ADC enabling compact, battery-operated front-end modules. Use Value: 81mW power at 65Msps extends battery life; 74dB SNR preserves tissue contrast resolution in B-mode imaging. |
Use Scenario: Simultaneous sampling of 16+ sensor channels (strain, vibration, temp) in industrial predictive maintenance systems. IC Role / Device Role / Timing Role: Precision ADC with low INL (±1LSB) and DNL (±0.3LSB) ensuring accurate multi-sensor correlation. Use Value: Pin-compatible family (LTC2257/LTC2256) allows scalable channel count without board redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9246BCPZ-65 | 14-bit, 65Msps; 74.5dB SNR, 89dB SFDR; 1.8V supply; LVDS-only outputs; no internal reference or SENSE pin. | Requires external reference and bias circuitry; lacks input range programmability and CMOS/DDR-CMOS flexibility. | Preferred where LVDS interface and highest SFDR are mandatory, and system-level reference design is already established. |
| LTC2257-14 | 14-bit, 40Msps version; identical pinout, package, and feature set; 73.8dB SNR, 88dB SFDR; 49mW power at 40Msps. | Lower sampling rate reduces power and FPGA data throughput; same analog performance and interface compatibility. | Drop-in replacement for cost- or power-sensitive designs where 40Msps meets bandwidth requirements. |
Compared with AD9246BCPZ-65, the LTC2258-14 offers integrated reference, programmable input range, and multi-interface flexibility at slight SNR trade-off; compared with LTC2257-14, it delivers 25Msps higher throughput with only 32mW additional power - making it optimal for bandwidth-critical SDR and base station upgrades.
Availability
LTC2258-14 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 support, and traceable sourcing.
Supply support for LTC2258-14 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP solutions, serving aerospace, industrial, automotive, and communications markets.
The LTC2258-14 belongs to Linear's ultralow-power, high-speed ADC product line designed specifically for demanding communications and instrumentation applications where dynamic range, jitter, and power efficiency are co-optimized.
FAQ
What is the maximum sampling rate of the LTC2258-14?
The LTC2258-14 supports a maximum sampling rate of 65Msps. This is specified under recommended operating conditions (VDD = OVDD = 1.8V, differential ENC+/ENC– = 2VP-P sine wave). At this rate, the device achieves 74dB SNR and 88dB SFDR with 81mW total power consumption in CMOS output mode. The LTC2258-14 is the highest-speed member of the LTC2258/LTC2257/LTC2256 family.
Does the LTC2258-14 support both CMOS and LVDS digital outputs?
Yes, the LTC2258-14 supports three configurable digital output modes: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS - selected via the SCK pin in parallel programming mode or SPI register in serial mode. LVDS mode requires OVDD = 1.7–1.9V and supports 1.75mA or 3.5mA output current with on-chip 100Ω termination.
What is the purpose of the SENSE pin on the LTC2258-14?
The SENSE pin (Pin 39) configures the LTC2258-14's input range and reference source. Tying SENSE to VDD selects the internal 1.25V reference and ±1V differential input range; tying to GND selects ±0.5V range; applying 0.625–1.3V enables proportional ±0.8× input range scaling - allowing precise front-end gain matching without external resistors.
How does the LTC2258-14 manage power in low-duty-cycle systems?
The LTC2258-14 provides two low-power states: Nap mode (9mW) and Sleep mode (0.5mW), entered via SDI (in parallel mode) or SPI command (in serial mode). Both preserve register settings and allow sub-microsecond wake-up. This makes the LTC2258-14 suitable for burst-mode acquisition in portable medical or test equipment where average power must be minimized.
Is the LTC2258-14 pin-compatible with other members of its family?
Yes, the LTC2258-14 is pin-compatible with the LTC2257-14 (40Msps) and LTC2256-14 (25Msps) - sharing identical 40-pin QFN (6mm × 6mm) UJ package, pin functions, power domains, and interface logic. This allows hardware reuse across performance tiers, simplifying design scalability and inventory management for multi-rate systems.
DC1370A-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Number of A/D Converters:
- 1
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 25M
- Data Interface:
- Parallel, Serial, SPI
- Input Range:
- 1 ~ 2Vpp
- Power (Typ) @ Conditions:
- 115.2mW @ 25MSPS
- Utilized IC / Part:
- LTC2256-14
- Contents:
- Board(s)
DC1370A-F FAQ
1.How can I place an order for DC1370A-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1370A-F 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 DC1370A-F reliable?
The price and inventory of DC1370A-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1370A-F is usually 5 days.
3.What payment methods are accepted for DC1370A-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1370A-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1370A-F?
DC1370A-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1370A-F 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 DC1370A-F?
For technical support, including DC1370A-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1370A-F requirements.
6.How does Aetrix verify that DC1370A-F is sourced from the original manufacturer or authorized distributors?
All DC1370A-F 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 DC1370A-F meets industry standards.
7.What is the process for return or replacement of DC1370A-F?
All DC1370A-F units undergo pre-shipment inspection (PSI). If there is an issue with DC1370A-F, 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 DC1370A-F part is unused and in its original packaging.
Return procedure for DC1370A-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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