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Analog Devices Inc. LTC2151CUJ-12#PBF
- Part No.:
- LTC2151CUJ-12#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC2151CUJ-12#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,204
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Product details
Overview
LTC2151CUJ-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 210Msps analog-to-digital converter optimized for high-frequency undersampling in communications systems. It delivers 68.5dB SNR, 90dB SFDR, and 1.25GHz full-power bandwidth with DDR LVDS outputs, operating from a single 1.8V supply and supporting low-power Nap/Sleep modes.
For engineers reviewing the LTC2151CUJ-12#PBF datasheet, LTC2151CUJ-12#PBF pinout, LTC2151CUJ-12#PBF application, or LTC2151CUJ-12#PBF equivalent, key selection criteria include its 210Msps sampling rate, differential 1.5VP-P input range, SPI-configurable LVDS output current (1.75mA/3.5mA), clock duty cycle stabilizer, and 40-lead QFN package compatibility with pin-compatible 14-bit variants.
Technical Context
This ADC employs a 12-bit pipelined architecture with integrated sample-and-hold, correction logic, and DDR LVDS output drivers. Its 1.25GHz analog input bandwidth enables high-frequency undersampling up to 907MHz while maintaining 68.5dB SNR at 70MHz input.
The device supports dual programming modes-serial SPI (via CS/SCK/SDI/SDO) and parallel logic (via PAR/SER-selectable CS/SCK/SDI)-for configuring clock duty cycle stabilization, LVDS current, Nap/Sleep entry, and overflow detection. Pipeline latency is fixed at six clock cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in demanding signal acquisition. |
| Sampling Rate | 210Msps maximum - enables digitization of wideband IF signals up to ~105MHz Nyquist zone in direct-sampling architectures. |
| SNR | 68.5dB at 70MHz input - ensures high-fidelity baseband reconstruction in SDR and medical imaging applications. |
| SFDR | 90dB at 70MHz input (2nd/3rd harmonic) - suppresses spurious content critical for multi-carrier cellular basestation receivers. |
| Input Bandwidth | 1.25GHz full-power - supports undersampling of L-band and S-band RF signals without external track-and-hold. |
| Power Consumption | 333mW total at 210Msps (158mA VDD + 45mA OVDD) - balances performance and thermal management in dense RF front-ends. |
| Supply Voltage | Single 1.8V (VDD and OVDD) - simplifies power delivery and reduces board-level noise coupling versus dual-supply ADCs. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN with exposed pad (Pin 41 = GND), RoHS-compliant, 0°C to 70°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (1,2) | Analog supply input | 1.8V analog core power; requires local 0.1µF ceramic bypass per pin to minimize switching noise. |
| AIN+, AIN– (4,5) | Differential analog input | Accepts 1.5VP-P swing centered at VCM (0.439•VDD); requires 180° phase-matched drive for optimal linearity. |
| ENC+, ENC– (11,12) | Differential encode clock input | Edge-triggered sampling control; supports sine wave, LVDS, PECL, TTL, or CMOS drive with optional duty cycle stabilization. |
| D0_1+ to D10_11+ (18,19,22,23,24,25,28,29,31,32,33,34) | DDR LVDS data outputs | Double-data-rate multiplexed 12-bit output pairs; even bits on CLKOUT low, odd bits on CLKOUT high. |
| CLKOUT+, CLKOUT– (26,27) | DDR output clock | Source-synchronous clock for LVDS data capture; phase programmable via SPI to align with data eye. |
| OF+, OF– (14,15) | Overflow/underflow flag | Differential indication of ADC saturation; valid only during low phase of CLKOUT+ for precise timing alignment. |
| PAR/SER (40) | Programming mode select | Hardwired to GND for SPI mode (CS/SCK/SDI/SDO active) or VDD for parallel mode (CS/SCK/SDI as discrete controls). |
Key Features
| Feature | Design Value |
|---|---|
| DDR LVDS outputs | Reduces interface pin count by 50% vs. single-data-rate; supports 210Msps sustained throughput with low EMI and jitter. |
| Optional clock duty cycle stabilizer | Enables full-speed operation with non-50% clock duty cycles (e.g., from PLLs or dividers), eliminating external duty cycle correction circuitry. |
| SPI configuration interface | Allows runtime reconfiguration of LVDS current, Nap/Sleep mode, clock delay, and overflow behavior without hardware changes. |
| Low-power Nap and Sleep modes | Nap mode draws 99mW (vs. 333mW active); Sleep mode draws <2mW - extends uptime in battery-powered test equipment and portable SDRs. |
| 1.5VP-P easy-to-drive input range | Reduces requirement for high-voltage driver amplifiers; compatible with standard RF baluns and transformer-coupled front-ends. |
Applications
| Cellular Basestations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing 70MHz–220MHz IF signals from multi-carrier LTE/FDD-TDD receivers in macrocell and small-cell baseband units. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth for digital predistortion and MIMO channel estimation. Use Value: 90dB SFDR prevents intermodulation distortion from adjacent carriers; 210Msps sampling supports 100MHz+ instantaneous bandwidth within FPGA processing limits. | Use Scenario: Real-time spectrum analysis and adaptive waveform reception in field-deployable military/commercial SDR platforms. IC Role / Device Role / Timing Role: Primary digitizer in tunable RF front-end, enabling rapid frequency hopping and multi-standard protocol support (e.g., WiFi, LTE, Bluetooth). Use Value: 1.25GHz input bandwidth allows direct sampling of UHF/VHF bands; SPI configurability permits dynamic adjustment of LVDS drive strength for varying cable lengths. |
| Medical Imaging | Testing and Measurement Instruments |
Use Scenario: Acquiring ultrasound echo signals (5–20MHz) and MRI gradient waveforms in portable diagnostic systems. IC Role / Device Role / Timing Role: High-fidelity analog front-end digitizer preserving signal integrity for beamforming and image reconstruction algorithms. Use Value: 68.5dB SNR ensures sub-millimeter spatial resolution; low 0.54LSBRMS transition noise minimizes image graininess in B-mode displays. | Use Scenario: High-speed transient capture and spectral analysis in benchtop oscilloscopes and vector signal analyzers. IC Role / Device Role / Timing Role: Core sampling engine delivering real-time FFT processing capability with minimal pipeline latency (6 cycles). Use Value: DDR LVDS interface sustains 210Msps streaming to FPGA memory buffers; Nap mode enables low-power standby between triggered acquisitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9230-210EBZ | 12-bit, 210Msps, JESD204B serial interface instead of DDR LVDS; higher 375mW power; 0.95GHz input BW | Better suited for FPGA-based systems with JESD204B PHY support; less ideal for legacy LVDS-only designs | Select when migrating to high-density serial interconnects and FPGA resources permit JESD204B implementation |
| LTC2261IUJ-12#PBF | 12-bit, 105Msps, identical 40-lead QFN package and pinout; lower 280mW power; 1.3GHz input BW | Drop-in replacement for cost-sensitive or lower-bandwidth applications where 210Msps is not required | Choose for design reuse in space-constrained layouts where reduced speed is acceptable and power budget is tighter |
Compared with AD9230-210EBZ and LTC2261IUJ-12#PBF, the LTC2151CUJ-12#PBF uniquely balances 210Msps throughput, DDR LVDS simplicity, and ultra-low latency (6-cycle pipeline) - making it optimal for real-time closed-loop systems where deterministic timing and minimal interface overhead are critical.
Availability
LTC2151CUJ-12#PBF is available at Aetrix Electronics and suitable for cellular basestations, software defined radios, and medical imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2151CUJ-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP technologies, serving precision instrumentation, communications, and industrial markets.
The LTC215x-12 family was designed specifically for high-dynamic-range, high-input-frequency digitization in communications infrastructure and test equipment - emphasizing SNR/SFDR performance, low power, and flexible digital interfacing.
FAQ
What is the maximum sampling rate supported by the LTC2151CUJ-12#PBF?
The LTC2151CUJ-12#PBF supports a maximum sampling rate of 210Msps, as specified in its ordering part number and confirmed across all electrical characteristics tables. This rate is guaranteed over the full 0°C to 70°C operating temperature range with proper power supply decoupling and clock signal integrity.
Does the LTC2151CUJ-12#PBF require an external reference voltage?
No, the LTC2151CUJ-12#PBF includes an internal 1.25V reference (VREF) with ±30ppm/°C drift and supports both internal and external reference configurations. When SENSE is tied to VDD, the internal reference is selected and the analog input range is ±0.75V; applying 1.2V–1.3V to SENSE selects an external reference mode with ±0.6•VSENSE range.
How does the DDR LVDS interface of the LTC2151CUJ-12#PBF reduce system complexity?
The DDR LVDS interface of the LTC2151CUJ-12#PBF transmits two data bits per clock edge across each differential pair, halving the number of data lines required versus single-data-rate LVDS. This reduces PCB routing density, lowers EMI, and simplifies timing closure - especially critical in high-channel-count SDR and basestation designs where 12-bit data must be captured reliably at 210Msps.
Can the LTC2151CUJ-12#PBF operate with a non-50% duty cycle clock?
Yes, the LTC2151CUJ-12#PBF includes an optional clock duty cycle stabilizer that can be enabled via SPI register programming. When active, this circuit corrects duty cycle deviations in the ENC+/ENC– inputs, allowing full 210Msps performance even with clocks exhibiting 30%–70% duty cycle - eliminating the need for external duty cycle correction ICs or complex clock tree design.
What is the purpose of the PAR/SER pin on the LTC2151CUJ-12#PBF?
The PAR/SER pin on the LTC2151CUJ-12#PBF selects between serial SPI programming (when grounded) and parallel logic programming (when tied to VDD). In serial mode, CS/SCK/SDI/SDO form a 4-wire interface for full register access; in parallel mode, CS/SCK/SDI become discrete control inputs for basic functions like sleep mode and duty cycle stabilization - offering flexibility for resource-constrained microcontroller interfaces.
LTC2151CUJ-12#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 210M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 40-QFN (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2151CUJ-12#PBF FAQ
1.How can I place an order for LTC2151CUJ-12#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2151CUJ-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 LTC2151CUJ-12#PBF reliable?
The price and inventory of LTC2151CUJ-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 LTC2151CUJ-12#PBF is usually 5 days.
3.What payment methods are accepted for LTC2151CUJ-12#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2151CUJ-12#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2151CUJ-12#PBF?
LTC2151CUJ-12#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2151CUJ-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 LTC2151CUJ-12#PBF?
For technical support, including LTC2151CUJ-12#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2151CUJ-12#PBF requirements.
6.How does Aetrix verify that LTC2151CUJ-12#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2151CUJ-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 LTC2151CUJ-12#PBF meets industry standards.
7.What is the process for return or replacement of LTC2151CUJ-12#PBF?
All LTC2151CUJ-12#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2151CUJ-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 LTC2151CUJ-12#PBF part is unused and in its original packaging.
Return procedure for LTC2151CUJ-12#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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