My Inquiry
My Account
Analog Devices Inc. LTC2261IUJ-14#PBF
- Part No.:
- LTC2261IUJ-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC2261IUJ-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:323
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2261IUJ-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 125Msps ultralow-power pipelined ADC optimized for undersampling IF signals in communications infrastructure. It delivers 73.4dB SNR, 85dB SFDR, and 0.17psRMS aperture jitter at 1.8V supply, enabling high-fidelity digitization in cellular base stations and software-defined radios.
For engineers reviewing the LTC2261IUJ-14#PBF datasheet, LTC2261IUJ-14#PBF pinout, LTC2261IUJ-14#PBF application, or LTC2261IUJ-14#PBF equivalent, key selection criteria include its 800MHz full-power bandwidth, selectable CMOS/LVDS DDR outputs, 1.8V single-supply operation, and –40°C to +85°C industrial temperature grade.
Technical Context
This ADC employs a 14-bit pipelined architecture with integrated sample-and-hold, correction logic, and configurable digital output drivers. Its analog front-end supports differential input ranges from 1VP-P to 2VP-P and features an 800MHz full-power bandwidth S/H stage with 0.17psRMS jitter-critical for high-IF sampling without external clock cleanup.
Digital interface flexibility includes full-rate CMOS, double-data-rate CMOS, or double-data-rate LVDS outputs, each with independent OVDD control (1.2V–1.8V for CMOS; 1.7V–1.9V for LVDS). Configuration is handled via SPI port or parallel mode using PAR/SER, CS, SCK, and SDI pins, supporting shutdown, nap, and clock duty cycle stabilization modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature-ensures monotonicity in precision measurement systems. |
| Sampling Rate | 125Msps maximum-supports wideband signal capture up to Nyquist frequency of 62.5MHz. |
| SNR | 73.4dB at 70MHz input-enables high dynamic range digitization of RF/IF signals in SDRs and base stations. |
| SFDR | 85dB spurious-free dynamic range-minimizes harmonic distortion in multi-tone communication signals. |
| Power Dissipation | 127mW at 125Msps with CMOS outputs-reduces thermal load and simplifies power delivery in dense RF modules. |
| Aperture Jitter | 0.17psRMS-permits clean undersampling of IF frequencies up to several hundred MHz without external jitter cleaning. |
| Input Bandwidth | 800MHz full-power bandwidth-accommodates wideband analog inputs without external amplification or filtering. |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package (UJ), exposed pad soldered to PCB ground for thermal and electrical integrity. Pin 41 is GND-exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts 1–2VP-P differential signal; common-mode voltage set by VCM (Pin 37) or external bias. |
| ENC+, ENC– | Differential encode clock inputs | Trigger conversion on rising/falling edges; support sine, PECL, LVDS, TTL, or CMOS drive; optional duty cycle stabilizer. |
| 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 1.2–1.8V (CMOS) or 1.7–1.9V (LVDS); decoupled with 0.1µF capacitor to OGND (Pin 25). |
| PAR/SER (Pin 8) | Programming mode select | Ground = serial SPI mode; VDD = parallel mode for simplified control of output format and power states. |
| D0–D13, OF | Data and overflow outputs | 14-bit parallel data bus; OF indicates overflow; output format (full-rate CMOS, DDR CMOS, DDR LVDS) selected via SCK and PAR/SER. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow jitter sampling | 0.17psRMS aperture jitter enables direct undersampling of 300+ MHz IF signals without external clock conditioning. |
| Selectably terminated LVDS outputs | On-chip 100Ω termination eliminates need for external resistors in DDR LVDS mode, reducing BOM count and layout complexity. |
| Flexible reference configuration | SENSE pin selects internal ±0.5V or ±1V input range, or accepts external 0.625–1.3V reference for custom scaling. |
| Low-latency pipeline | 5.5-cycle latency in DDR modes ensures deterministic timing for real-time FPGA-based signal processing pipelines. |
| Multi-power-state operation | 9mW nap mode and 0.5mW sleep mode allow rapid power cycling in burst-mode receivers without reconfiguration delay. |
Applications
| Cellular Base Stations | Software Defined Radios |
|---|---|
Use Scenario: Digitizing 70–140MHz IF signals from multi-carrier transceivers in LTE/5G macrocells and small cells. IC Role / Device Role / Timing Role: High-speed ADC front-end capturing wide instantaneous bandwidth with minimal quantization noise and spurs. Use Value: 73.4dB SNR and 85dB SFDR preserve EVM and ACLR performance across multiple simultaneous carriers. | Use Scenario: Reconfigurable RF receiver in military comms or spectrum monitoring equipment requiring agile tuning and wide dynamic range. IC Role / Device Role / Timing Role: Core digitizer enabling real-time FFT, channelization, and demodulation across 20–100MHz instantaneous bandwidth. Use Value: 800MHz input bandwidth and 0.17psRMS jitter support direct sampling of L-/S-band IFs without image-reject mixers. |
| Portable Medical Imaging | Nondestructive Testing |
Use Scenario: Ultrasound beamformer digitizing echo returns from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: Low-noise, low-power ADC enabling battery-operated handheld scanners with >120dB dynamic range per channel. Use Value: 127mW power at 125Msps and 73.4dB SNR maximize battery life while preserving tissue contrast resolution. | Use Scenario: Ultrasonic flaw detection system digitizing high-frequency return pulses (10–50MHz) from composite material inspection. IC Role / Device Role / Timing Role: Precision digitizer capturing fast transient echoes with sub-nanosecond timing fidelity. Use Value: 0.17psRMS jitter and 85dB SFDR enable accurate time-of-flight measurements and small defect discrimination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS52J90IRGCT | 16-bit, 100Msps; JESD204B serial interface; higher resolution but lower speed and no LVDS option. | Better suited for high-resolution medical imaging where SNR > 75dB is critical and data rate ≤100Msps. | Choose when resolution priority outweighs speed and interface simplicity; requires FPGA with JESD204B PHY. |
| AD9246BCPZ-125 | 14-bit, 125Msps; 1.8V supply; 72.5dB SNR, 84dB SFDR; no internal clock stabilizer or randomizer. | Direct functional match for IF sampling but lacks optional clock duty cycle stabilizer and data randomizer features. | Choose for cost-sensitive designs where those features are unused; identical speed, resolution, and package footprint. |
Compared with ADS52J90IRGCT and AD9246BCPZ-125, the LTC2261IUJ-14#PBF uniquely combines 125Msps speed, 73.4dB SNR, 0.17psRMS jitter, and flexible LVDS/CMOS DDR outputs in a single 40-pin QFN-making it optimal for space-constrained, high-performance IF digitization where deterministic latency and low jitter are non-negotiable.
Availability
LTC2261IUJ-14#PBF is available at Aetrix Electronics and suitable for cellular base station development, software-defined radio prototyping, and portable medical ultrasound systems requiring stable component supply across extended temperature ranges.
Supply support for LTC2261IUJ-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 industrial, automotive, communications, and healthcare markets.
The LTC2261 series belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring exceptional AC performance, low power, and robust industrial temperature operation.
FAQ
What is the operating temperature range of the LTC2261IUJ-14#PBF?
The LTC2261IUJ-14#PBF is rated for industrial operation from –40°C to +85°C, as confirmed by its "I" grade marking and Absolute Maximum Ratings table. This makes it suitable for outdoor base stations, ruggedized SDR platforms, and portable medical devices exposed to ambient thermal variation.
Does the LTC2261IUJ-14#PBF support both CMOS and LVDS digital outputs?
Yes, the LTC2261IUJ-14#PBF supports three output configurations: full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS-all selectable via the PAR/SER and SCK pins. LVDS mode uses internal 100Ω termination and operates with OVDD = 1.7–1.9V.
What is the minimum analog input voltage range supported by the LTC2261IUJ-14#PBF?
The LTC2261IUJ-14#PBF supports a selectable differential analog input range of 1VP-P to 2VP-P, as specified in the Analog Input section. The actual range is configured via the SENSE pin and internal reference settings, with 1VP-P being the minimum valid full-scale range.
How does the clock duty cycle stabilizer function in the LTC2261IUJ-14#PBF?
The clock duty cycle stabilizer in the LTC2261IUJ-14#PBF corrects asymmetric encode clocks to maintain optimal sampling window symmetry. It is enabled when CS is high in parallel programming mode and improves AC performance-especially SFDR-at full 125Msps sampling rate with non-50% duty cycle inputs.
Is the LTC2261IUJ-14#PBF pin-compatible with other members of the LTC226x family?
Yes, the LTC2261IUJ-14#PBF is pin-compatible with the LTC2260-14 and LTC2259-14, as explicitly stated in the Features section. All share the same 40-pin QFN (UJ) package, identical pinout, and compatible interface signaling-enabling drop-in speed-grade migration (125/105/80Msps) without PCB redesign.
LTC2261IUJ-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:
- -40°C ~ 85°C
- Supplier Device Package:
- 40-QFN (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2261IUJ-14#PBF FAQ
1.How can I place an order for LTC2261IUJ-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2261IUJ-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 LTC2261IUJ-14#PBF reliable?
The price and inventory of LTC2261IUJ-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 LTC2261IUJ-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2261IUJ-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2261IUJ-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2261IUJ-14#PBF?
LTC2261IUJ-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2261IUJ-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 LTC2261IUJ-14#PBF?
For technical support, including LTC2261IUJ-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2261IUJ-14#PBF requirements.
6.How does Aetrix verify that LTC2261IUJ-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2261IUJ-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 LTC2261IUJ-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2261IUJ-14#PBF?
All LTC2261IUJ-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2261IUJ-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 LTC2261IUJ-14#PBF part is unused and in its original packaging.
Return procedure for LTC2261IUJ-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2261IUJ-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…
