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Analog Devices Inc. LTC2151IUJ-14#PBF
- Part No.:
- LTC2151IUJ-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC2151IUJ-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,753
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Product details
Overview
LTC2151IUJ-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 210Msps analog-to-digital converter optimized for high-frequency undersampling in communications infrastructure. It delivers 70dB SNR, 90dB SFDR, and 1.25GHz full-power bandwidth with single 1.8V supply operation, targeting cellular basestations and software-defined radios.
For engineers reviewing the LTC2151IUJ-14#PBF datasheet, LTC2151IUJ-14#PBF pinout, LTC2151IUJ-14#PBF application, or LTC2151IUJ-14#PBF equivalent, key selection criteria include DDR LVDS output compliance, 210Msps sampling rate at industrial temperature range (–40°C to +85°C), SPI-configurable clock duty cycle stabilization, and 40-pin QFN package thermal performance.
Technical Context
The LTC2151IUJ-14#PBF implements a 14-bit pipelined ADC architecture with integrated sample-and-hold, correction logic, and DDR LVDS output drivers. Its 1.25GHz input bandwidth enables direct RF sampling of IF signals up to 380MHz while maintaining 70dB SNR at 71MHz input.
It supports differential analog input with programmable ±0.75V (internal reference) or ±0.6×VSENSE (external reference) ranges, and features low-latency 6-cycle pipeline timing. Clock inputs accept sine wave, PECL, LVDS, TTL, or CMOS, with optional duty cycle stabilizer for full-speed operation across wide duty cycle variation.
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 measurement systems. |
| Sampling Rate | 210Msps maximum - enables real-time digitization of wideband signals in SDR and test equipment without decimation bottlenecks. |
| SNR / SFDR | 70dB SNR and 90dB SFDR at 71MHz input - ensures high-fidelity signal capture in demanding wireless receiver front-ends. |
| Input Bandwidth | 1.25GHz full-power bandwidth - supports undersampling of UHF and L-band RF signals without external filtering degradation. |
| Power Consumption | 338mW total at 210Msps (160mA VDD + 34.5mA OVDD) - balances performance and thermal management in dense RF modules. |
| Operating Temperature | –40°C to +85°C (I-grade) - validated for deployment in outdoor basestation cabinets and industrial test instrumentation. |
| Digital Interface | DDR LVDS outputs with 100Ω on-chip termination - reduces PCB routing complexity and eliminates external termination resistors. |
Pinout & Package
40-lead (6mm × 6mm) plastic QFN package with exposed thermal pad (Pin 41 = GND). Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (1,2) | Analog supply input | 1.8V ±0.1V analog core power; requires local 0.1µF ceramic bypass per pin for noise suppression. |
| AIN+, AIN– (4,5) | Differential analog input | Accepts 1.5VP-P differential signal centered at VCM (0.439×VDD); supports DC-coupled or AC-coupled RF/IF inputs. |
| ENC+, ENC– (11,12) | Differential encode clock input | Edge-triggered sampling control; accepts 2VP-P sine wave or digital logic; duty cycle stabilizer configurable via SPI. |
| D0_1+ to D12_13+ (16–17,18–19,22–23,24–25,28–29,31–32,33–34) | DDR LVDS data outputs | Seven differential pairs carrying multiplexed even/odd bits; 3.5mA or 1.75mA programmable current; internal 100Ω termination. |
| CLKOUT+, CLKOUT– (26,27) | Data output clock | Synchronizes DDR LVDS data transitions; phase delay programmable via mode registers to align with FPGA/CPLD capture timing. |
| OF+, OF– (14,15) | Overflow/underflow flag | Indicates saturation event; valid only during low phase of CLKOUT+ - enables real-time clipping detection in digital signal processing chains. |
| PAR/SER, CS, SCK, SDI, SDO (40,39,38,37,36) | SPI configuration interface | Serial programming mode (PAR/SER = GND) enables full register access; parallel mode (PAR/SER = VDD) provides simplified control of sleep/nap modes and LVDS current. |
Key Features
| Feature | Design Value |
|---|---|
| Single 1.8V supply operation | Eliminates multi-rail power design complexity and reduces BOM count in space-constrained RF modules. |
| DDR LVDS outputs with on-chip 100Ω termination | Reduces PCB layer count and layout sensitivity by removing external termination resistors and differential trace length matching constraints. |
| Optional clock duty cycle stabilizer | Enables robust 210Msps operation with non-50% duty cycle clocks (e.g., from PLLs or crystal oscillators), avoiding external clock conditioning circuits. |
| Low-power Nap (105mW) and Sleep (<2mW) modes | Supports dynamic power scaling in time-division systems (e.g., TDD basestations), extending thermal headroom during idle periods. |
| 6-cycle deterministic pipeline latency | Enables precise timing alignment in closed-loop feedback systems such as adaptive beamforming or real-time interference cancellation. |
| Industrial temperature grade (–40°C to +85°C) | Validated for continuous operation in uncontrolled environments including outdoor macrocells and portable test gear. |
Applications
| Cellular Basestation Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing 70–220MHz IF signals from multi-carrier GSM/LTE transceivers in remote radio heads. IC Role / Device Role / Timing Role: High-speed ADC front-end capturing wide instantaneous bandwidth with minimal quantization noise and harmonic distortion. Use Value: 90dB SFDR prevents adjacent channel interference masking weak user signals; 1.25GHz bandwidth allows direct sampling without image-reject filters. |
Use Scenario: Reconfigurable wideband receiver in military or public safety radios supporting multiple waveforms (e.g., P25, DMR, LTE). IC Role / Device Role / Timing Role: Core digitizer enabling real-time spectrum analysis and adaptive demodulation across 10–500MHz tuning range. Use Value: 70dB SNR preserves modulation accuracy for 256-QAM; SPI configurability allows runtime adjustment of LVDS current and clock stabilization for varying RF conditions. |
| Medical Ultrasound Beamformer | High-Speed Test & Measurement |
Use Scenario: Channel digitization in phased-array ultrasound systems requiring >100Msps sampling per channel for 15MHz transducer signals. IC Role / Device Role / Timing Role: Low-jitter (0.15ps RMS) sample-and-hold front-end preserving time-of-flight resolution for echo depth calculation. Use Value: 1.82LSBRMS transition noise minimizes speckle artifacts; 6-cycle latency enables tight loop timing in digital beam synthesis. |
Use Scenario: Real-time spectrum analyzer front-end capturing transient RF events (e.g., radar pulses, EMI bursts) at 210Msps with 1.25GHz input bandwidth. IC Role / Device Role / Timing Role: High-fidelity acquisition engine delivering FFT-ready samples with calibrated INL (±1LSB typ) and DNL (±0.25LSB typ). Use Value: –95dB cross-talk prevents channel crosstalk in multi-input analyzers; DDR LVDS interface sustains sustained 4.2Gbps data throughput to FPGA memory buffers. |
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-150 | 14-bit, 150Msps; 74dB SNR; 700MHz BW; 3.3V/1.8V dual supply | Lower sampling rate and bandwidth; requires dual-supply design and external LVDS termination | Select when system clocking is limited to ≤150MHz and dual-supply infrastructure already exists. |
| LTC2261IUJ-12#PBF | 12-bit, 105Msps; 69dB SNR; 1GHz BW; same 40-pin QFN package | Lower resolution and speed; pin-compatible but not functionally equivalent due to reduced ENOB and latency | Choose for cost-sensitive applications where 12-bit resolution suffices and board layout reuse is critical. |
Compared with AD9246BCPZ-150, LTC2151IUJ-14#PBF delivers +60Msps sampling and +550MHz bandwidth at lower supply voltage, eliminating dual-rail complexity; versus LTC2261IUJ-12#PBF, it adds two bits of resolution and doubles speed while retaining identical footprint and thermal profile.
Availability
LTC2151IUJ-14#PBF is available at Aetrix Electronics and suitable for cellular basestation receiver design, software-defined radio development, medical ultrasound beamforming, and high-speed test & measurement instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC2151IUJ-14#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 digital signal processing technologies.
The LTC2151IUJ-14#PBF belongs to the LTC215x family of ultra-high-speed ADCs designed specifically for communications infrastructure and instrumentation where wide bandwidth, high SNR, and low power coexist under industrial environmental stress.
FAQ
What is the maximum sampling rate supported by the LTC2151IUJ-14#PBF?
The LTC2151IUJ-14#PBF supports a maximum sampling rate of 210Msps, as specified in its ordering part number and confirmed in the datasheet's timing characteristics table. This rate is guaranteed over the full industrial temperature range (–40°C to +85°C) with proper power supply decoupling and thermal management. Operation above this rate is not characterized and may result in degraded AC performance or functional failure.
Does the LTC2151IUJ-14#PBF require an external reference voltage?
No - the LTC2151IUJ-14#PBF includes an internal 1.25V reference (VREF) and supports both internal and external reference modes. When SENSE is tied to VDD, the device uses its internal reference and provides a ±0.75V differential input range. An external 1.2V–1.3V reference applied to SENSE selects a ±0.6×VSENSE range. The internal reference is trimmed to ±1% accuracy and drifts ±30ppm/°C.
How does the DDR LVDS interface of the LTC2151IUJ-14#PBF reduce system-level design complexity?
The LTC2151IUJ-14#PBF integrates 100Ω on-chip termination resistors for all DDR LVDS output pairs, eliminating the need for external termination components. Its 3.5mA or 1.75mA programmable output current allows optimization for signal integrity versus power consumption. Combined with deterministic 6-cycle latency and CLKOUT phase adjustment, this simplifies FPGA capture timing closure and reduces PCB layer count in high-density RF boards.
Can the LTC2151IUJ-14#PBF operate with non-50% duty cycle clock inputs?
Yes - the LTC2151IUJ-14#PBF includes an optional clock duty cycle stabilizer that can be enabled via its SPI interface. When active, this circuit corrects duty cycle deviations in the ENC+/ENC– differential clock input, ensuring optimal aperture jitter performance and maintaining 70dB SNR at full 210Msps sampling rate - even with clocks exhibiting 30%–70% duty cycle.
What thermal considerations apply to the LTC2151IUJ-14#PBF in continuous 210Msps operation?
The LTC2151IUJ-14#PBF dissipates 338mW at 210Msps and has a θJA of 34.1°C/W. With the exposed pad (Pin 41) properly soldered to a 4-layer PCB with ≥2 in² copper pour, junction temperature rise is ~11.5°C above ambient. For operation at +85°C ambient, junction temperature remains within the 150°C absolute maximum, provided adequate airflow or heatsinking is implemented in enclosed basestation enclosures.
LTC2151IUJ-14#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:
- 14
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 40-QFN (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2151IUJ-14#PBF FAQ
1.How can I place an order for LTC2151IUJ-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2151IUJ-14#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 LTC2151IUJ-14#PBF reliable?
The price and inventory of LTC2151IUJ-14#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2151IUJ-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2151IUJ-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2151IUJ-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2151IUJ-14#PBF?
LTC2151IUJ-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2151IUJ-14#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 LTC2151IUJ-14#PBF?
For technical support, including LTC2151IUJ-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2151IUJ-14#PBF requirements.
6.How does Aetrix verify that LTC2151IUJ-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2151IUJ-14#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 LTC2151IUJ-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2151IUJ-14#PBF?
All LTC2151IUJ-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2151IUJ-14#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 LTC2151IUJ-14#PBF part is unused and in its original packaging.
Return procedure for LTC2151IUJ-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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