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Analog Devices Inc. LTC2228CUH#PBF
- Part No.:
- LTC2228CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2228CUH#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:174
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Product details
Overview
LTC2228CUH#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 65Msps low-power 3V analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in imaging and communications systems. It delivers 71.3dB SNR and 90dB SFDR at Nyquist, features ±0.3LSB typical INL, 575MHz full-power bandwidth, and operates from a single 2.7V–3.4V supply consuming 205mW.
For engineers reviewing the LTC2228CUH#PBF datasheet, LTC2228CUH#PBF pinout, LTC2228CUH#PBF application, or LTC2228CUH#PBF equivalent, key selection criteria include its 65Msps sampling rate, differential input architecture with flexible ±0.5V to ±1V range, clock duty cycle stabilizer support, and QFN-32 package compatibility with high-density PCB layouts.
Technical Context
The LTC2228CUH#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 circuit supports both differential and single-ended analog inputs, with acquisition delay fixed at 0ns and CLK-to-DATA delay of 1.4–5.4ns depending on load.
It integrates a programmable reference system via SENSE and MODE pins, enabling selection between offset binary or 2's complement output formats and internal reference scaling (±0.5V or ±1V). The clock duty cycle stabilizer allows high AC performance across 30%–70% input clock duty cycles without external conditioning.
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. |
| Sampling Rate | 65Msps - enables digitization of signals up to 32.5MHz (Nyquist), suitable for broadband IF sampling in comms receivers. |
| SNR | 71.3dBFS at 5MHz input - provides >11.8 effective number of bits (ENOB) for high-fidelity spectral analysis. |
| SFDR | 90dBc at 5MHz input (2nd/3rd harmonic) - suppresses spurious content critical for multi-tone wireless signal capture. |
| Power Consumption | 205mW at 65Msps - balances performance and thermal budget in portable or densely packed instrumentation. |
| Input Bandwidth | 575MHz full-power bandwidth - supports direct RF sampling of L-band signals without external amplification. |
| INL / DNL | ±0.3LSB typ / ±0.15LSB typ - ensures linearity integrity for calibration-sensitive applications like medical ultrasound beamforming. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed pad (Pin 33 = GND), RoHS-compliant lead-free finish. Thermal resistance θJA = 34°C/W; exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±0.5V to ±1V differential signal; common-mode voltage set by VCM (1.5V) or external bias; requires matched layout for optimal CMRR & SFDR. |
| REFH, REFL | ADC reference voltage terminals | Shorted pairs (Pins 3/4 and 5/6); require 0.1μF + 2.2μF ceramic bypassing to minimize reference noise and ensure stable full-scale accuracy. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; supports duty cycle stabilizer when MODE pin configured; tL/tH min 5ns with stabilizer enabled. |
| SHDN, OE | Power management control inputs | Enable three power states: normal (SHDN=L, OE=L), nap mode (SHDN=H, OE=L, 15mW), shutdown (SHDN=H, OE=H, 2mW). |
| D0–D11 | Parallel CMOS digital outputs | 12-bit LSB-to-MSB (D0–D11); output swing referenced to OVDD (0.5–3.6V); tri-state controlled by OE; timing-critical for FPGA/ASIC interface. |
| MODE, SENSE | Configuration programming pins | MODE selects output format (offset binary/2's complement) and duty cycle stabilizer; SENSE sets input range (±0.5V/±1V/external) and reference source. |
| OVDD, OGND | Digital output supply and ground | Independent from analog VDD/GND; allows interfacing to 1.8V/2.5V/3.3V logic without level shifters; reduces digital switching noise coupling into analog section. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range | Programmable ±0.5V to ±1V differential input via SENSE pin - eliminates need for external gain stages in varying signal-level systems. |
| Clock duty cycle stabilizer | On-chip circuit maintains sampling accuracy across 30%–70% input clock duty cycles - removes requirement for external clock conditioners in FPGA-driven systems. |
| Low power at high speed | 205mW at 65Msps with 71.3dB SNR - achieves >345kSPS/mW efficiency, critical for battery-powered portable instrumentation. |
| Multi-mode power control | Three low-power states (normal/nap/shutdown) with <2mW shutdown current - enables rapid wake-up and energy-aware system scheduling. |
| High-precision reference system | Internal 1.5V VCM and programmable reference with ±30ppm/°C drift - ensures stable DC accuracy and gain matching across temperature in calibrated equipment. |
Applications
| Ultrasound Imaging | Wireless Baseband Receiver |
|---|---|
Use Scenario: Digitizing echo return signals from phased-array transducers operating at 2–15MHz center frequencies. IC Role / Device Role / Timing Role: High-speed ADC capturing time-of-flight data with sub-nanosecond timing resolution for beamforming and Doppler processing. Use Value: 71.3dB SNR preserves weak tissue boundary reflections; 575MHz bandwidth supports harmonics up to 3rd order for contrast agent detection. |
Use Scenario: Direct-conversion sampling of LTE/WiMAX baseband I/Q signals at intermediate frequency (IF) up to 30MHz. IC Role / Device Role / Timing Role: Dual-channel (I/Q) ADC front-end with precise phase-matched sampling for quadrature demodulation. Use Value: 90dB SFDR prevents intermodulation distortion from adjacent channel interference; ±0.15LSB DNL ensures accurate constellation mapping. |
| Spectral Analysis Instrumentation | Portable Test Equipment |
Use Scenario: Real-time FFT-based spectrum analyzers measuring RF emissions from 10kHz–32MHz with <1Hz resolution bandwidth. IC Role / Device Role / Timing Role: High-linearity ADC feeding FPGA-based FFT engine with deterministic 5-cycle latency for coherent averaging. Use Value: No missing codes and ±0.3LSB INL enable accurate amplitude calibration across full dynamic range; low 0.25LSBRMS transition noise minimizes spectral leakage. |
Use Scenario: Handheld oscilloscopes and signal analyzers requiring battery operation and compact form factor. IC Role / Device Role / Timing Role: Primary digitizer with integrated power management for adaptive sampling rate control and sleep/wake cycles. Use Value: 205mW at 65Msps and 2mW shutdown reduce thermal load and extend battery life; QFN-32 package enables <10cm² PCB footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9226BCPZ-65 | 12-bit, 65Msps, 3.3V supply, 220mW, 70.5dB SNR, 88dB SFDR, 48-lead LFCSP | Higher power, lower SNR/SFDR, larger package - less suitable for space-constrained portable designs requiring best-in-class linearity. | Select LTC2228CUH#PBF when SNR >71dB and SFDR >90dB are required at 65Msps; choose AD9226BCPZ-65 only if legacy LFCSP footprint compatibility is mandatory. |
| ADS5272IPFP | 12-bit, 65Msps, 3.3V supply, 360mW, 70.8dB SNR, 87dB SFDR, 64-lead HTQFP | Higher power, lower AC performance, larger package and higher pin count - increases BOM cost and layout complexity. | LTC2228CUH#PBF offers 155mW lower power and 2.2dB higher SFDR than ADS5272IPFP; preferred for thermally sensitive or high-density board designs. |
Compared with AD9226BCPZ-65 and ADS5272IPFP, the LTC2228CUH#PBF delivers superior dynamic range (71.3dB SNR / 90dB SFDR) at lower power (205mW) and in a smaller 5×5mm QFN, making it optimal for portable, high-fidelity signal acquisition where linearity and thermal efficiency are prioritized.
Availability
LTC2228CUH#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, wireless baseband receivers, spectral analysis instrumentation, and portable test equipment requiring stable component supply, long-term manufacturability, and guaranteed RoHS compliance.
Supply support for LTC2228CUH#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2228CUH#PBF belongs to the LTC22xx family of low-power, high-speed pipeline ADCs designed specifically for demanding imaging, instrumentation, and communications applications where dynamic range, power efficiency, and small footprint are critical.
FAQ
What is the maximum input frequency supported by the LTC2228CUH#PBF while maintaining full-scale accuracy?
The LTC2228CUH#PBF has a 575MHz full-power bandwidth, meaning it can accurately digitize analog inputs up to that frequency with ≤3dB amplitude roll-off. For full-scale accuracy per AC specifications (71.3dB SNR, 90dB SFDR), the recommended maximum input frequency is 140MHz - verified in the datasheet's FFT plots at –1dBFS input level and 65Msps sampling.
Does the LTC2228CUH#PBF support single-ended analog input configurations?
Yes, the LTC2228CUH#PBF supports single-ended analog inputs, though differential drive is recommended for optimal AC performance. When driven single-ended, harmonic distortion increases slightly versus differential mode, but the device retains full 12-bit resolution, no missing codes, and specified DC accuracy across temperature.
How does the MODE pin configuration affect the output format and clock functionality of the LTC2228CUH#PBF?
The MODE pin on the LTC2228CUH#PBF selects both output coding and clock duty cycle stabilization: grounded → 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 flexible system integration without external logic.
What are the power supply requirements for the LTC2228CUH#PBF's analog and digital sections?
The LTC2228CUH#PBF requires two independent supplies: VDD (2.7V–3.4V, 68.3mA typical) powers the analog core and reference; OVDD (0.5V–3.6V, configurable) powers the 12-bit CMOS digital outputs. Separating these supplies isolates digital switching noise from the analog path, preserving SNR and SFDR performance.
Can the LTC2228CUH#PBF be used in systems requiring extended temperature operation beyond 0°C to 70°C?
No - the LTC2228CUH#PBF is rated for 0°C to 70°C ambient operation (indicated by the "C" grade in the part number). For industrial or automotive environments requiring –40°C to 85°C, the pin-compatible LTC2228IUH#PBF variant must be selected instead, as confirmed in the official ordering information table.
LTC2228CUH#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):
- 65M
- 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:
- -
LTC2228CUH#PBF FAQ
1.How can I place an order for LTC2228CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2228CUH#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 LTC2228CUH#PBF reliable?
The price and inventory of LTC2228CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2228CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2228CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2228CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2228CUH#PBF?
LTC2228CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2228CUH#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 LTC2228CUH#PBF?
For technical support, including LTC2228CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2228CUH#PBF requirements.
6.How does Aetrix verify that LTC2228CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2228CUH#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 LTC2228CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2228CUH#PBF?
All LTC2228CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2228CUH#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 LTC2228CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2228CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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