My Inquiry
My Account
Analog Devices Inc. LTC2261CUJ-14#PBF
- Part No.:
- LTC2261CUJ-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC2261CUJ-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,095
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2261CUJ-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 125Msps pipelined analog-to-digital converter optimized for undersampling high-frequency IF signals in communications infrastructure. It delivers 73.4dB SNR, 85dB SFDR, and ultralow 0.17psRMS aperture jitter with single 1.8V supply operation and 800MHz full-power bandwidth - enabling direct digitization of 70–140MHz cellular and SDR waveforms.
For engineers reviewing the LTC2261CUJ-14#PBF datasheet, LTC2261CUJ-14#PBF pinout, LTC2261CUJ-14#PBF application, or LTC2261CUJ-14#PBF equivalent, key selection criteria include its 125Msps sampling rate at 127mW power, DDR LVDS/CMOS output flexibility, ±1LSB INL, and QFN-40 package compatibility with high-density RF front-end layouts.
Technical Context
The LTC2261CUJ-14#PBF implements a 14-bit pipeline ADC architecture with integrated sample-and-hold, correction logic, and configurable digital outputs. Its ENC+/ENC– differential clock interface supports sine, PECL, LVDS, TTL, or CMOS inputs, and includes an optional duty cycle stabilizer to maintain performance across wide input duty cycles.
Digital output modes include full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS - each with independent OVDD supply (1.2V–1.9V for CMOS; 1.7V–1.9V for LVDS). The SPI port enables configuration of randomizer, nap/sleep modes, and reference selection via PAR/SER-controlled serial or parallel programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full dynamic range utilization. |
| Sampling Rate | 125Msps maximum - supports Nyquist-sampled baseband or undersampled IF signals up to 140MHz. |
| SNR | 73.4dB at 70MHz input - enables high-fidelity digitization of narrowband cellular carriers with low quantization noise floor. |
| SFDR | 85dB at 70MHz input (2nd/3rd harmonic) - suppresses spurious content critical for multi-carrier LTE/WCDMA systems. |
| Aperture Jitter | 0.17psRMS - limits sampling uncertainty to preserve SNR when undersampling GHz-range IFs. |
| Power Dissipation | 127mW at 125Msps with CMOS outputs - enables thermal management in compact 6mm × 6mm QFN layouts. |
| Input Bandwidth | 800MHz full-power - accommodates wideband signals without external anti-alias filtering degradation. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN (UJ), exposed pad soldered to PCB ground for thermal and EMI performance.
| 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). |
| ENC+, ENC– | Differential encode clock input | Starts conversion on rising/falling edges; supports 0.2V min differential swing and external duty cycle stabilization. |
| VDD (Pins 9,10,40) | Analog supply | 1.8V ±0.1V supply; requires local 0.1µF ceramic bypass per pin for noise-sensitive analog core. |
| OVDD (Pin 26) | Digital output supply | Configurable 1.2–1.9V for CMOS or 1.7–1.9V for LVDS - sets output voltage swing and termination. |
| D0–D13, OF | Data and overflow outputs | 14-bit parallel data + overflow flag; pin mapping differs between full-rate CMOS, DDR CMOS, and DDR LVDS modes. |
| PAR/SER (Pin 8) | Programming mode select | Ground = serial SPI control; VDD = parallel logic control of clock stabilizer, output mode, and sleep function. |
| REFH/REFL (Pins 4–7) | Reference voltage terminals | Support internal 1.25V reference or external reference; require 2.2µF + 0.1µF bypassing for stable ADC accuracy. |
| SENSE (Pin 39) | Reference configuration | Selects ±1V (SENSE = VDD) or ±0.5V (SENSE = GND) input range; accepts external 0.625–1.3V reference. |
Key Features
| Feature | Design Value |
|---|---|
| Optional data output randomizer | Reduces deterministic spectral tones in output data stream - essential for spectral purity in SDR transceivers. |
| Shutdown and nap modes | Reduces power to 0.5mW (sleep) or 9mW (nap) - enables rapid power cycling in battery-powered portable medical imaging systems. |
| Selectable input ranges (1–2VP-P) | Allows optimization of dynamic range for varying signal amplitudes without external gain staging. |
| Serial SPI port for configuration | Enables runtime reconfiguration of output format, clock stabilizer, and power modes - simplifies system-level calibration. |
| Pin-compatible 14-bit/12-bit family | Facilitates design reuse across performance tiers (LTC2261/LTC2260/LTC2259) without PCB layout changes. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing 70–140MHz IF signals from multi-carrier LTE/WCDMA transceivers in macrocell and small cell radios. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth with minimal spurious content and jitter-induced noise degradation. Use Value: 85dB SFDR and 0.17psRMS jitter enable clean capture of adjacent channels without guard-band overhead. | Use Scenario: Reconfigurable IF sampling in military/commercial SDR platforms supporting multiple waveform standards (e.g., FM, AM, TDMA, OFDM). IC Role / Device Role / Timing Role: Flexible-resolution, multi-mode ADC supporting real-time switching between CMOS and LVDS output interfaces and programmable input scaling. Use Value: PAR/SER-selectable serial/parallel control and DDR LVDS output reduce FPGA I/O count and simplify high-speed interconnect routing. |
| Portable Medical Imaging | Multi-Channel Data Acquisition |
Use Scenario: Ultrasound beamforming and Doppler processing in handheld echocardiography devices requiring low power and high SNR. IC Role / Device Role / Timing Role: Low-noise, low-power ADC digitizing 5–30MHz echo return signals with 73.4dB SNR at 125Msps. Use Value: 127mW power at full speed and nap mode support extend battery life while maintaining diagnostic image resolution. | Use Scenario: Simultaneous sampling of multiple sensor channels (e.g., vibration, acoustic emission) in industrial predictive maintenance systems. IC Role / Device Role / Timing Role: Precision ADC providing synchronized 14-bit acquisition across distributed nodes with deterministic latency (5.5 cycles pipeline). Use Value: ±1LSB INL and ±0.3LSB DNL ensure accurate amplitude correlation across channels for FFT-based fault detection. |
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-125 | 14-bit, 125Msps; 74.7dB SNR, 88dB SFDR; 1.8V supply; 48-lead LFCSP package | Higher SFDR and slightly better SNR; larger package footprint and different pinout | Preferred where SFDR >88dB is required for dense multi-tone environments; not pin-compatible. |
| LTC2260CUJ-14#PBF | 14-bit, 105Msps; 73.4dB SNR, 85dB SFDR; identical QFN-40 package and pinout | Lower sampling rate reduces power to 106mW; same feature set and register map | Drop-in alternative when 105Msps suffices - enables lower power and thermal headroom without layout change. |
Compared with AD9246BCPZ-125, LTC2261CUJ-14#PBF offers tighter integration of clock duty cycle stabilization and lower system-level BOM cost via internal reference and flexible output drive, while LTC2260CUJ-14#PBF provides a true pin-compatible power-optimized variant within the same family.
Availability
LTC2261CUJ-14#PBF is available at Aetrix Electronics and suitable for cellular base stations, software defined radios, and portable medical imaging requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2261CUJ-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving communications, industrial, automotive, and healthcare markets.
The LTC2261CUJ-14#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for undersampling RF/IF signals in demanding communications and instrumentation applications where jitter, SNR, and power efficiency are critical.
FAQ
What is the maximum sampling rate supported by the LTC2261CUJ-14#PBF?
The LTC2261CUJ-14#PBF supports a maximum sampling rate of 125Msps, validated across the full 0°C to 70°C operating temperature range. This rate is specified under standard conditions: VDD = OVDD = 1.8V, differential ENC+/ENC– = 2VP-P sine wave, and 2VP-P analog input range. Performance metrics including SNR and SFDR are guaranteed at this rate.
Does the LTC2261CUJ-14#PBF support both CMOS and LVDS digital outputs?
Yes, the LTC2261CUJ-14#PBF supports three digital output configurations: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Output mode is selected via the SCK pin in parallel programming mode or through SPI register settings in serial mode. LVDS mode requires OVDD = 1.7–1.9V and supports internal 100Ω termination.
What is the purpose of the PAR/SER pin on the LTC2261CUJ-14#PBF?
The PAR/SER pin (Pin 8) determines the programming interface mode of the LTC2261CUJ-14#PBF. When tied to GND, it enables serial SPI control (CS/SCK/SDI/SDO) for full feature configuration. When tied to VDD, it enables parallel logic control of key functions including clock duty cycle stabilization (CS), output mode (SCK), and sleep mode (SDI), reducing FPGA resource usage.
How does the SENSE pin affect the input range of the LTC2261CUJ-14#PBF?
The SENSE pin (Pin 39) configures the LTC2261CUJ-14#PBF's analog input range: connecting SENSE to VDD selects ±1V (2VP-P) range with internal reference; connecting to GND selects ±0.5V (1VP-P) range. An external reference voltage (0.625–1.3V) applied to SENSE enables custom input scaling while maintaining 14-bit resolution and linearity.
What power-saving modes are available on the LTC2261CUJ-14#PBF?
The LTC2261CUJ-14#PBF offers two low-power states: Nap Mode (9mW) and Sleep Mode (0.5mW), both accessible via the SDI pin in parallel programming mode or SPI register control in serial mode. These modes retain register settings and allow fast wake-up (<1µs), making them suitable for burst-mode acquisition in portable and energy-constrained systems.
LTC2261CUJ-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):
- 125M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel, 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:
- -
LTC2261CUJ-14#PBF FAQ
1.How can I place an order for LTC2261CUJ-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2261CUJ-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 LTC2261CUJ-14#PBF reliable?
The price and inventory of LTC2261CUJ-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 LTC2261CUJ-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2261CUJ-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2261CUJ-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2261CUJ-14#PBF?
LTC2261CUJ-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2261CUJ-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 LTC2261CUJ-14#PBF?
For technical support, including LTC2261CUJ-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2261CUJ-14#PBF requirements.
6.How does Aetrix verify that LTC2261CUJ-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2261CUJ-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 LTC2261CUJ-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2261CUJ-14#PBF?
All LTC2261CUJ-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2261CUJ-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 LTC2261CUJ-14#PBF part is unused and in its original packaging.
Return procedure for LTC2261CUJ-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2261CUJ-14#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
