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Analog Devices Inc. LTC2226IUH#PBF
- Part No.:
- LTC2226IUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2226IUH#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:619
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Product details
Overview
LTC2226IUH#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 Nyquist, features ±0.3LSB typical INL, 575MHz full-power bandwidth, and operates from a single 3V supply with separate OVDD for flexible logic interfacing.
For engineers reviewing the LTC2226IUH#PBF datasheet, LTC2226IUH#PBF pinout, LTC2226IUH#PBF application, or LTC2226IUH#PBF equivalent, key selection considerations include its 25Msps sample rate, 2VP-P differential input range, clock duty cycle stabilizer, shutdown/nap modes, and QFN-32 package compatibility within the LTC2228/LTC2227/LTC2226 family.
Technical Context
The LTC2226IUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and aperture jitter of 0.2psRMS. Its sample-and-hold uses differential NMOS-switched 4pF sampling capacitors with 575MHz bandwidth and supports both differential and single-ended analog drive.
It integrates a programmable reference system with SENSE and VCM pins enabling ±0.5V to ±1V input ranges, internal 1.5V common-mode bias, and configurable output format (offset binary or 2's complement). Clock control includes a duty cycle stabilizer activated via MODE pin voltage thresholds.
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 per Nyquist criterion. |
| SNR | 71.4dB (typ, 5MHz input) - supports >11.5 effective bits for high-fidelity spectral analysis. |
| SFDR | 90dB (2nd/3rd harmonic, 5MHz input) - suppresses spurious content critical for multi-tone communication receivers. |
| Power Dissipation | 75mW (typ, VDD = 3V) - enables portable and thermally constrained instrumentation designs. |
| Input Bandwidth | 575MHz full-power - preserves transient fidelity for fast-rising pulses in ultrasound and radar front-ends. |
| INL / DNL | ±0.3LSB (typ) / ±0.15LSB (typ) - ensures linearity-critical applications like medical imaging maintain spatial accuracy. |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33) soldered to PCB ground. Pin 1 marked by dot; top-side markings include "2226" and temperature grade indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±0.5V to ±1V differential signal; requires matched layout for optimal CMRR & SFDR. |
| REFH, REFL | ADC reference voltage terminals | Shorted pairs; require 0.1μF + 2.2μF ceramic bypassing to minimize reference noise coupling. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; supports duty cycle stabilizer when MODE pin biased to 1/3 VDD. |
| SHDN, OE | Power management control inputs | Enable three low-power states: normal (SHDN=L, OE=L), nap (SHDN=H, OE=L), shutdown (SHDN=H, OE=H). |
| D0–D11 | Parallel digital output bus | 12-bit MSB-first LVCMOS outputs; level-shifted by OVDD (0.5V–3.6V) for direct interface to FPGAs or ASICs. |
| SENSE, VCM | Reference and common-mode programming | SENSE selects input range (±0.5V to ±1V); VCM provides 1.5V ±25ppm/°C bias for differential driver termination. |
| OF | Over/underflow flag output | Active-high indication of input exceeding selected full-scale range - used for AGC or clipping detection. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range | Programmable ±0.5V to ±1V differential range via SENSE pin - eliminates external gain stages in sensor interfaces. |
| Low power at 25Msps | 75mW typical dissipation - reduces thermal load and enables battery-powered portable instrumentation. |
| Integrated clock duty cycle stabilizer | Enables high AC performance across 35%–65% input clock duty cycles - relaxes clock generator design constraints. |
| 575MHz input bandwidth | Preserves signal integrity for wideband RF sampling and pulsed ultrasound echo reception. |
| Pin-compatible family | Shares identical QFN-32 footprint and pinout with LTC2227 (40Msps) and LTC2228 (65Msps) - simplifies platform scaling. |
Applications
| Ultrasound Imaging | Spectral Analysis |
|---|---|
|
Use Scenario: Digitizing RF echo signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: High-fidelity analog front-end ADC capturing 5–15MHz band-limited echoes with minimal harmonic distortion. Use Value: 71.4dB SNR and 90dB SFDR preserve tissue contrast resolution; 575MHz bandwidth captures transient pulse edges without slew-induced distortion. |
Use Scenario: Real-time frequency-domain analysis of vibration signatures in industrial predictive maintenance sensors. IC Role / Device Role / Timing Role: Precision digitizer for FFT-based spectral decomposition of mechanical resonance signals. Use Value: ±0.3LSB INL ensures amplitude accuracy across frequency bins; low 0.25LSBRMS transition noise minimizes spectral leakage. |
| Portable Instrumentation | Wired Broadband Communication |
|
Use Scenario: Handheld spectrum analyzers and oscilloscopes requiring low power and high dynamic range. IC Role / Device Role / Timing Role: Core ADC in battery-operated test equipment with 25Msps real-time sampling capability. Use Value: 75mW power enables >4-hour operation on Li-ion packs; shutdown mode draws only 2mW for rapid wake-up. |
Use Scenario: Baseband I/Q sampling in DOCSIS 3.1 cable modem upstream receivers. IC Role / Device Role / Timing Role: Digitizing 5–65MHz upstream channel signals with stringent linearity requirements. Use Value: 90dB SFDR meets DOCSIS spectral mask compliance; 2VP-P input range accommodates variable-gain amplifier outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS5272IPFP | 12-bit, 40Msps, 72dB SNR, 84dB SFDR, 32-pin HTQFP, 3.3V supply only | Higher speed but lower SFDR; lacks clock duty cycle stabilizer and flexible input range | Select for cost-sensitive 40Msps systems where SFDR >84dB suffices and board space allows HTQFP |
| LTC2246IUH#PBF | 14-bit, 25Msps, 74dB SNR, 88dB SFDR, same QFN-32 package and pinout | Higher resolution but slightly lower SFDR; shares identical footprint, power, and interface | Select when ENOB >12 bits is required and 88dB SFDR meets system spurious budget |
Compared with ADS5272IPFP and LTC2246IUH#PBF, the LTC2226IUH#PBF offers superior SFDR for multi-tone communication signals and unique input range flexibility, while maintaining identical QFN-32 packaging and lower power than the 14-bit variant - making it optimal for 25Msps applications prioritizing spurious-free dynamic range and power efficiency.
Availability
LTC2226IUH#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable instrumentation, wired broadband modems, and spectral analysis equipment requiring stable component supply across industrial temperature ranges.
Supply support for LTC2226IUH#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 LTC2226IUH#PBF belongs to ADI's high-speed precision ADC product line, engineered for demanding digitization tasks in medical imaging, test equipment, and broadband infrastructure where dynamic range, low power, and thermal stability are critical.
FAQ
What is the operating temperature range for the LTC2226IUH#PBF?
The LTC2226IUH#PBF is rated for –40°C to +85°C industrial temperature operation, as indicated by the "I" grade suffix in the part number. This range is validated across all AC and DC specifications including SNR, SFDR, INL, and power consumption - ensuring reliable performance in outdoor or thermally uncontrolled environments where the LTC2226IUH#PBF is deployed.
Does the LTC2226IUH#PBF support single-ended analog input?
Yes, the LTC2226IUH#PBF supports single-ended analog input, though differential drive is recommended for optimal harmonic distortion and CMRR. When driven single-ended, AIN– must be tied to VCM (1.5V), and SNR/SFDR degrade by ~1–2dB compared to differential mode - a trade-off documented in the LTC2226IUH#PBF datasheet for cost-sensitive applications where layout simplicity outweighs peak performance.
How does the MODE pin configure output format and clock stabilization on the LTC2226IUH#PBF?
The MODE pin on the LTC2226IUH#PBF sets both output coding 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-function pin eliminates external configuration logic and allows runtime reconfiguration of the LTC2226IUH#PBF in field-upgradable systems.
What is the purpose of the OF (Over/Under Flow) pin on the LTC2226IUH#PBF?
The OF pin on the LTC2226IUH#PBF is an active-high output that asserts when the analog input exceeds the selected full-scale range (±0.5V or ±1V), indicating clipping or saturation. It is used in automatic gain control (AGC) loops and diagnostic firmware to dynamically adjust front-end amplifier gain - ensuring the LTC2226IUH#PBF operates within its linear region during signal acquisition.
Can the LTC2226IUH#PBF be used with OVDD = 1.8V for interfacing to modern FPGAs?
Yes, the LTC2226IUH#PBF supports OVDD from 0.5V to 3.6V, including 1.8V, enabling direct connection to 1.8V FPGA I/O banks without level shifters. At OVDD = 1.8V, VOH is guaranteed ≥1.79V and VOL ≤0.09V under 1.6mA load - meeting LVCMOS18 voltage thresholds and reducing BOM count and signal integrity risk in the LTC2226IUH#PBF interface path.
LTC2226IUH#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2226IUH#PBF FAQ
1.How can I place an order for LTC2226IUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2226IUH#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 LTC2226IUH#PBF reliable?
The price and inventory of LTC2226IUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2226IUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2226IUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2226IUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2226IUH#PBF?
LTC2226IUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2226IUH#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 LTC2226IUH#PBF?
For technical support, including LTC2226IUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2226IUH#PBF requirements.
6.How does Aetrix verify that LTC2226IUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2226IUH#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 LTC2226IUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2226IUH#PBF?
All LTC2226IUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2226IUH#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 LTC2226IUH#PBF part is unused and in its original packaging.
Return procedure for LTC2226IUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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