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Analog Devices Inc. LTC2226CUH#PBF
- Part No.:
- LTC2226CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2226CUH#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:142
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Product details
Overview
LTC2226CUH#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 25Msps low-power 3V analog-to-digital converter optimized for high-dynamic-range signal digitization in imaging and communications systems. It delivers 71.4dB SNR and 90dB SFDR at 5MHz input, ±0.3LSB INL (typ), 575MHz full-power bandwidth, and operates from a single 2.7V–3.4V supply consuming only 75mW.
For engineers reviewing the LTC2226CUH#PBF datasheet, LTC2226CUH#PBF pinout, LTC2226CUH#PBF application, or LTC2226CUH#PBF equivalent, key selection criteria include its 25Msps sample rate, differential analog input support, flexible 1VP-P to 2VP-P input range, clock duty cycle stabilizer, and shutdown/nap modes for power-sensitive embedded data acquisition.
Technical Context
The LTC2226CUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and aperture delay jitter of 0.2psRMS. Its sample-and-hold front-end supports both differential and single-ended drive, with common-mode bias provided by the internal 1.5V VCM output.
It features a programmable reference interface via SENSE pin (enabling ±0.5V to ±1V input ranges), dual-reference pins (REFH/REFL) with dedicated bypassing requirements, and configurable output format (offset binary or 2's complement) controlled by the MODE pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision measurement. |
| Sample Rate | 25Msps - enables baseband digitization of signals up to 12.5MHz (Nyquist) in cost-constrained instrumentation. |
| SNR | 71.4dB at 5MHz input - provides >11.8 effective number of bits (ENOB) for high-fidelity spectral analysis. |
| SFDR | 90dB at 5MHz input (2nd/3rd harmonic) - ensures clean capture of weak signals adjacent to strong interferers. |
| Power Dissipation | 75mW at 25Msps - allows thermal management in dense PCB layouts without forced cooling. |
| Input Bandwidth | 575MHz full-power - supports undersampling of IF signals up to ~140MHz with minimal amplitude roll-off. |
| INL / DNL | ±0.3LSB (typ) / ±0.15LSB (typ) - minimizes harmonic distortion and preserves linearity in closed-loop control feedback paths. |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed pad (Pin 33) soldered to PCB ground for thermal and electrical integrity. Pin pitch: 0.5mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±0.5V to ±1V differential signal; requires matched layout and 50Ω termination for optimal AC performance. |
| REFH, REFL | ADC reference voltage terminals | Must be shorted in pairs and bypassed with 0.1μF + 2.2μF ceramics to minimize reference noise coupling. |
| VDD (Pins 7, 32) | Analog supply | 2.7V–3.4V operation; each pin requires local 0.1μF ceramic decoupling to GND. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; supports duty cycle stabilizer when MODE pin is biased at 1/3 or 2/3 VDD. |
| SHDN, OE | Power mode control inputs | Enable nap mode (15mW) or shutdown (2mW); OE controls tri-state output drivers independent of SHDN state. |
| D0–D11 | Parallel CMOS digital outputs | MSB = D11; output voltage swing referenced to OVDD (0.5V–3.6V), enabling direct interface to 1.8V/2.5V/3.3V logic. |
| SENSE | Input range programming pin | Setting to VCM selects ±0.5V range; to VDD selects ±1V range; external voltage sets proportional ±VSENSE range. |
| MODE | Output format & DCS control | GND = offset binary + DCS off; 1/3 VDD = offset binary + DCS on; 2/3 VDD = 2's complement + DCS on. |
| VCM | Internal 1.5V bias reference | Provides common-mode level for single-ended drive or external circuit biasing; requires 2.2μF ceramic bypass to GND. |
| OF | Over/underflow flag | Active-high pulse indicates input exceeded selected full-scale range - critical for real-time signal clipping detection. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | ±0.5V to ±1V via SENSE pin - eliminates need for external gain stages in multi-range sensor interfaces. |
| Integrated clock duty cycle stabilizer | Enables high AC performance across 30%–70% CLK duty cycles - relaxes clock source design constraints in FPGA-based systems. |
| Low-power shutdown and nap modes | 2mW shutdown / 15mW nap - extends battery life in portable ultrasound and handheld spectrum analyzers. |
| Tri-state output drivers with OVDD scaling | Supports 0.5V–3.6V logic levels - simplifies interfacing to mixed-voltage FPGAs and ASICs without level shifters. |
| On-chip 1.5V VCM generator | Stable ±25ppm/°C tempco - reduces BOM count and layout area in differential driver circuits. |
Applications
| Ultrasound Beamforming | Portable Spectrum Analyzers |
|---|---|
|
Use Scenario: Digitizing RF echo signals from phased-array transducers operating at 2.5–10MHz center frequencies. IC Role / Device Role / Timing Role: Primary ADC capturing time-aligned channel data with sub-0.3LSB INL to preserve spatial resolution and dynamic contrast. Use Value: 71.4dB SNR enables detection of low-amplitude tissue reflections; 575MHz bandwidth supports harmonic imaging up to 20MHz. |
Use Scenario: Real-time FFT-based frequency analysis in handheld field test equipment with <100g weight constraint. IC Role / Device Role / Timing Role: High-fidelity digitizer for IF downconverted signals, synchronized to internal DDS clock. Use Value: 75mW power enables >4 hours battery life; 90dB SFDR resolves narrowband interferers within 10kHz spacing. |
| Industrial Imaging Sensors | Communications Baseband Receivers |
|
Use Scenario: Capturing line-scan CCD outputs in automated optical inspection (AOI) systems requiring 12-bit fidelity at 20ksps–25Msps. IC Role / Device Role / Timing Role: Precision ADC converting analog pixel voltages into digital image data with no missing codes. Use Value: ±0.3LSB INL prevents intensity banding artifacts; shutdown mode reduces idle power during inter-frame blanking. |
Use Scenario: Digitizing baseband I/Q signals in LTE/WiMAX femtocell receivers with 5–20MHz channel bandwidth. IC Role / Device Role / Timing Role: Dual-channel (I/Q) ADC front-end with matched gain/phase response across channels. Use Value: 0.25LSBRMS transition noise minimizes EVM degradation; 2's complement output format simplifies DSP correlation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS5271IPFP | 12-bit, 40Msps, 1.8V supply, LVDS outputs - higher speed but requires external reference and level-shifting. | Targets higher-bandwidth baseband receivers where 40Msps sampling is mandatory. | Select when system clock exceeds 25MHz and LVDS serialization is preferred over parallel CMOS. |
| AD9226ASTZ | 12-bit, 65Msps, 5V supply, no integrated VCM or SENSE programming - higher power (1.1W) and less flexible input scaling. | Suitable for fixed-range, high-SNR lab equipment where board space and power are secondary. | Choose only if legacy 5V infrastructure exists and ±2V input range suffices without gain adjustment. |
Compared with ADS5271IPFP and AD9226ASTZ, the LTC2226CUH#PBF offers lower power, integrated bias generation, and programmable input range - making it optimal for portable, battery-powered, or thermally constrained designs where 25Msps meets system bandwidth needs.
Availability
LTC2226CUH#PBF is available at Aetrix Electronics and suitable for portable medical devices, industrial imaging sensors, handheld test equipment, and communications baseband receivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC2226CUH#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 LTC2226CUH#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding digitization tasks in portable, low-power, and high-dynamic-range applications where accuracy, power efficiency, and integration are critical.
FAQ
What is the maximum input frequency supported by the LTC2226CUH#PBF while maintaining specified SNR?
The LTC2226CUH#PBF maintains 71.3dB SNR up to 30MHz input frequency and 70.1dB SNR at 20MHz under –1dBFS conditions. Its 575MHz full-power bandwidth allows undersampling of IF signals up to 140MHz, though SNR degrades to 69.8dB at that frequency. For best SNR retention, keep analog input content below 30MHz in Nyquist-mode applications.
How does the SENSE pin configure input range on the LTC2226CUH#PBF?
The SENSE pin on the LTC2226CUH#PBF directly programs full-scale differential input range: connecting to VCM selects ±0.5V, to VDD selects ±1V, and to an external voltage (0.5V–1V) sets ±VSENSE. This eliminates external gain resistors and enables dynamic range adaptation in multi-gain sensor interfaces without changing hardware.
Can the LTC2226CUH#PBF operate with a 1.8V OVDD supply?
Yes, the LTC2226CUH#PBF supports OVDD from 0.5V to 3.6V. At OVDD = 1.8V, VOH is guaranteed ≥1.79V and VOL ≤0.09V with 1.6mA sink current, enabling direct connection to 1.8V FPGA I/O banks without level shifters - confirmed in the Digital Outputs section of the datasheet.
What is the function of the MODE pin on the LTC2226CUH#PBF?
The MODE pin on the LTC2226CUH#PBF selects both output data format and clock duty cycle stabilizer (DCS) state: GND = offset binary + DCS off; 1/3 VDD = offset binary + DCS on; 2/3 VDD = 2's complement + DCS on; VDD = 2's complement + DCS off. This dual functionality simplifies PCB routing by consolidating two control functions into one pin.
Does the LTC2226CUH#PBF require external reference components?
No - the LTC2226CUH#PBF includes an internal 1.5V reference and VCM generator. However, REFH and REFL pins must be externally bypassed: shorted in pairs and decoupled with 0.1μF + 2.2μF ceramics to GND per the datasheet layout guidelines to ensure stable reference operation and minimize noise coupling.
LTC2226CUH#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 25M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- 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:
- 2.7V ~ 3.4V
- Voltage - Supply, Digital:
- 2.7V ~ 3.4V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2226CUH#PBF FAQ
1.How can I place an order for LTC2226CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2226CUH#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 LTC2226CUH#PBF reliable?
The price and inventory of LTC2226CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2226CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2226CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2226CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2226CUH#PBF?
LTC2226CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2226CUH#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 LTC2226CUH#PBF?
For technical support, including LTC2226CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2226CUH#PBF requirements.
6.How does Aetrix verify that LTC2226CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2226CUH#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 LTC2226CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2226CUH#PBF?
All LTC2226CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2226CUH#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 LTC2226CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2226CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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