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Analog Devices Inc. LTC2227IUH#PBF
- Part No.:
- LTC2227IUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2227IUH#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:319
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Product details
Overview
LTC2227IUH#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 40Msps low-power 3V analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in imaging and communications systems. It delivers 71.4dB SNR and 90dB SFDR at 5MHz input, ±0.3LSB typical INL, 575MHz full-power bandwidth, and operates from a single 2.7V–3.4V supply consuming 120mW.
For engineers reviewing the LTC2227IUH#PBF datasheet, LTC2227IUH#PBF pinout, LTC2227IUH#PBF application, or LTC2227IUH#PBF equivalent, key selection criteria include its 40Msps sampling rate, differential analog input support, clock duty cycle stabilizer, flexible reference configuration via SENSE pin, and QFN-32 package with exposed thermal pad.
Technical Context
The LTC2227IUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic to achieve high linearity and low distortion. Its sample-and-hold circuit features 575MHz full-power bandwidth and 0.25LSBRMS transition noise, enabling accurate digitization of RF and IF signals up to Nyquist.
It supports both offset binary and 2's complement output formats selected via the MODE pin, and includes programmable input range (±0.5V to ±1V) through the SENSE pin. The integrated 1.5V VCM buffer provides common-mode bias, while separate OVDD (0.5V–3.6V) allows interfacing with diverse logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in closed-loop control or spectral analysis. |
| Sampling Rate | 40Msps - supports baseband digitization up to 20MHz or IF sampling of 30–70MHz bands with adequate alias margin. |
| SNR | 71.4dB at 5MHz input - enables >11.5 effective bits for high-fidelity ultrasound or spectral monitoring applications. |
| SFDR | 90dB at 5MHz input (2nd/3rd harmonic) - suppresses spurious content critical in multi-carrier wireless receivers. |
| Power Dissipation | 120mW at 40Msps - reduces thermal load in portable instrumentation and densely packed medical imaging modules. |
| Input Bandwidth | 575MHz full-power - preserves signal integrity for fast-rising pulses in time-of-flight or LIDAR front-ends. |
| INL / DNL | ±0.3LSB typ / ±0.15LSB typ - ensures minimal integral error in precision measurement and calibration-critical systems. |
Pinout & Package
The LTC2227IUH#PBF is housed in a 32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33), requiring soldering to PCB ground for optimal thermal performance and EMI suppression.
| 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 SFDR. |
| REFH, REFL | ADC reference voltage terminals | Must be shorted in pairs and bypassed with 0.1μF + 2.2μF ceramics to minimize reference noise and settle residue errors. |
| VDD (Pins 7, 32) | Analog supply | 2.7V–3.4V single supply; each pin requires local 0.1μF ceramic decoupling to GND. |
| GND (Pin 8) | Analog ground | Separate from OGND; forms star ground point with exposed pad for analog integrity. |
| CLK | Single-ended sampling clock | Positive-edge triggered; supports duty cycle stabilizer when MODE = 1/3 VDD or 2/3 VDD. |
| SHDN, OE | Power management control | Combination controls Nap mode (15mW) or Shutdown (2mW); OE enables/disables 12-bit parallel LVCMOS outputs. |
| D0–D11 | Parallel digital outputs | MSB-first offset binary or 2's complement; driven by OVDD (0.5V–3.6V) for direct interface to FPGA I/O banks. |
| OF | Over/underflow flag | Active-high pulse indicates saturation; used for automatic gain control or clipping detection in real-time processing. |
| MODE | Output format & DCS select | Four-state logic selects output coding and clock duty cycle stabilizer enable/disable - critical for jitter-sensitive clock sources. |
| SENSE | Input range programming | Direct connection to VCM, VDD, or external 0.5–1.0V sets ±0.5V, ±1.0V, or ±VSENSE full-scale range. |
| VCM | 1.5V common-mode bias | Provides stable 1.5V reference for differential driver circuits; requires 2.2μF ceramic bypass to GND. |
| OVDD, OGND | Digital output supply/ground | Independent from VDD/GND; enables level-shifting to 1.8V/2.5V/3.3V logic without affecting analog performance. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range | Programmable ±0.5V to ±1V full-scale via SENSE pin - eliminates external gain stages in multi-range sensor interfaces. |
| Clock duty cycle stabilizer | Compensates for 30%–70% CLK duty cycle variation - enables use of non-50% clocks from PLLs or crystal oscillators without SNR degradation. |
| Low power at speed | 120mW at 40Msps with 15mW Nap mode - extends battery life in handheld spectral analyzers and portable ultrasound probes. |
| High dynamic accuracy | 71.4dB SNR and 90dB SFDR at 5MHz - meets LTE/WiMAX receiver requirements for adjacent channel rejection and ENOB consistency. |
| Robust thermal design | Exposed pad (Pin 33) tied to PCB ground - achieves θJA = 34°C/W for reliable operation at –40°C to +85°C industrial temperature range. |
Applications
| Ultrasound Imaging Front-End | Wireless Baseband Receiver |
|---|---|
Use Scenario: Digitizing 5–15MHz echo return signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: High-speed ADC capturing time-domain RF envelopes with minimal quantization noise and harmonic distortion. Use Value: 71.4dB SNR preserves tissue contrast resolution; 575MHz input bandwidth maintains pulse fidelity for sub-millimeter spatial resolution. | Use Scenario: Downconverting and digitizing multi-carrier LTE/WiMAX baseband signals in small-cell femtocell radios. IC Role / Device Role / Timing Role: 40Msps pipeline ADC providing 12-bit resolution for I/Q channel digitization prior to FPGA-based FFT processing. Use Value: 90dB SFDR prevents intermodulation masking of weak adjacent channels; flexible OVDD supports direct connection to 1.8V FPGA I/O banks. |
| Spectral Analysis Instrumentation | Portable Digital Oscilloscope |
Use Scenario: Real-time frequency-domain analysis of vibration, acoustic, or EMI emissions in field-deployable test equipment. IC Role / Device Role / Timing Role: Precision ADC feeding 8192-point FFT engines with calibrated amplitude response across 0–20MHz span. Use Value: ±0.3LSB INL ensures flat magnitude response; no missing codes guarantees accurate peak detection in harmonic sweep measurements. | Use Scenario: Capturing transient waveforms in handheld oscilloscopes with ≥20MHz analog bandwidth and ≥1GSa/s equivalent sampling via interpolation. IC Role / Device Role / Timing Role: Primary digitizer for dual-channel 40Msps acquisition with Nap mode for low-power idle states between triggers. Use Value: 120mW power envelope enables fanless thermal design; OF pin provides hardware-level overrange alert for auto-ranging algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS5273IPFP | 12-bit, 40Msps, 70dB SNR, 84dB SFDR, 3.3V supply only, no internal reference | Requires external reference and clock conditioning; lower SFDR limits multi-tone dynamic range | Select when system already uses 3.3V analog rails and external reference is preferred for tighter tolerance control. |
| AD9226ASTZ | 12-bit, 65Msps, 72dB SNR, 85dB SFDR, 5V supply, no clock duty cycle stabilizer | Higher speed but higher power (350mW); lacks DCS and flexible input range programming | Select when sampling >40Msps is required and 5V infrastructure exists; avoid where clock source jitter or duty cycle variation is uncontrolled. |
Compared with ADS5273IPFP and AD9226ASTZ, the LTC2227IUH#PBF offers superior SFDR (90dB vs 84/85dB) and integrated clock duty cycle stabilization-critical for systems using low-jitter but non-50% clocks-while maintaining lower power and flexible reference configuration.
Availability
LTC2227IUH#PBF is available at Aetrix Electronics and suitable for ultrasound imaging, wireless baseband receivers, spectral analysis instrumentation, and portable digital oscilloscopes requiring stable component supply across industrial temperature ranges.
Supply support for LTC2227IUH#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 LTC2227IUH#PBF belongs to the Linear Technology LTC22xx family of ultra-low-noise, low-power pipeline ADCs designed specifically for demanding communications and medical imaging applications where dynamic range and power efficiency are critical.
FAQ
What is the operating temperature range of the LTC2227IUH#PBF?
The LTC2227IUH#PBF is rated for industrial operation from –40°C to +85°C, 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, making it suitable for deployment in outdoor base stations, portable medical devices, and factory-floor instrumentation without derating.
Does the LTC2227IUH#PBF require an external reference voltage?
No, the LTC2227IUH#PBF includes an internal 1.5V reference and supports flexible input ranges (±0.5V to ±1V) via the SENSE pin. External reference operation is optional: applying a 0.5V–1.0V voltage to SENSE sets ±VSENSE, while connecting SENSE to VCM or VDD configures fixed ranges. No external reference is needed for standard operation.
How does the MODE pin affect the LTC2227IUH#PBF's output format and clock functionality?
The MODE pin on the LTC2227IUH#PBF selects 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 enables deterministic interface timing and signal processing alignment without additional logic.
Can the LTC2227IUH#PBF interface directly with a 1.8V FPGA I/O bank?
Yes, the LTC2227IUH#PBF supports direct interfacing with 1.8V logic through its independent OVDD supply pin (0.5V–3.6V). When OVDD = 1.8V, the D0–D11 outputs and OF pin meet 1.8V LVCMOS voltage thresholds, eliminating level shifters and reducing board area and signal integrity risk in compact FPGA-based designs.
What is the purpose of the exposed pad (Pin 33) on the LTC2227IUH#PBF QFN package?
The exposed pad (Pin 33) on the LTC2227IUH#PBF is electrically connected to analog ground (GND) and serves as the primary thermal path. It must be soldered to a PCB copper pour tied to the analog ground plane to achieve the specified θJA = 34°C/W and ensure stable performance under continuous 40Msps operation at maximum ambient temperature.
LTC2227IUH#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):
- 40M
- 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:
- -
LTC2227IUH#PBF FAQ
1.How can I place an order for LTC2227IUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2227IUH#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 LTC2227IUH#PBF reliable?
The price and inventory of LTC2227IUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2227IUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2227IUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2227IUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2227IUH#PBF?
LTC2227IUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2227IUH#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 LTC2227IUH#PBF?
For technical support, including LTC2227IUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2227IUH#PBF requirements.
6.How does Aetrix verify that LTC2227IUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2227IUH#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 LTC2227IUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2227IUH#PBF?
All LTC2227IUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2227IUH#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 LTC2227IUH#PBF part is unused and in its original packaging.
Return procedure for LTC2227IUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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