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Analog Devices Inc. LTC2252CUH#PBF
- Part No.:
- LTC2252CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2252CUH#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,171
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Product details
Overview
LTC2252CUH#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 105Msps low-power analog-to-digital converter designed for high-frequency signal digitization in communications and imaging systems. It operates from a single 3V supply (2.85V–3.4V), delivers 70.2dB SNR at 5MHz input, 88dB SFDR, and features a 640MHz full-power bandwidth sample-and-hold with clock duty cycle stabilizer. It is used in ultrasound front-ends where wide dynamic range and low power are critical.
For engineers reviewing the LTC2252CUH#PBF datasheet, LTC2252CUH#PBF pinout, LTC2252CUH#PBF application, or LTC2252CUH#PBF equivalent, key selection considerations include its 105Msps sampling rate, differential analog input support (±0.5V to ±1V range), flexible output voltage drive (0.5V–3.3V), shutdown/nap modes, and QFN-32 (5mm × 5mm) package compatibility with pin-matched LTC2254.
Technical Context
The LTC2252CUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency. Its sample-and-hold circuit supports differential inputs up to 640MHz full-power bandwidth and includes a dedicated clock duty cycle stabilizer to maintain AC performance across variable input clock duty cycles.
It integrates an internal 1.5V VCM reference buffer, programmable input range via SENSE pin (±0.5V to ±1V), and configurable output format (offset binary or 2's complement) via MODE pin. Digital outputs are driven by separate OVDD (0.5V–3.6V), enabling direct interface with 1.8V/2.5V/3.3V logic without level shifters.
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 systems. |
| Sampling Rate | 105Msps - enables Nyquist-limited capture of signals up to 52.5MHz, suitable for IF sampling in broadband receivers. |
| SNR | 70.2dB at 5MHz input - provides >11.6 effective number of bits (ENOB) for high-fidelity signal reconstruction. |
| SFDR | 88dB at 5MHz input - suppresses spurious tones sufficiently for spectral analysis and communication channel monitoring. |
| Power Dissipation | 320mW at 105Msps - enables thermal management in dense PCB layouts without forced air cooling. |
| Input Bandwidth | 640MHz full-power bandwidth - supports wideband RF/IF sampling without external anti-alias filtering below 640MHz. |
| INL / DNL | ±0.3LSB typ / ±0.15LSB typ - ensures linearity critical for calibration-sensitive applications like medical imaging and test equipment. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed pad (Pin 33 = GND, must be soldered to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±0.5V to ±1V differential signal; common-mode bias set by VCM (1.5V) or external source. |
| REFH, REFL | ADC reference high/low terminals | Support internal or external reference; require local 0.1µF + 2.2µF bypassing for noise immunity. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; duty cycle stabilizer active when MODE = 1/3 VDD or 2/3 VDD. |
| SHDN, OE | Shutdown and output enable control | Four power states: normal, output disabled, nap mode (15mW), sleep mode (2mW). |
| D0–D11 | Parallel digital output bus (12-bit) | MSB = D11; output voltage swing referenced to OVDD (configurable 0.5V–3.6V). |
| MODE, SENSE | Output format and input range programming | MODE selects offset binary/2's complement and enables duty cycle stabilizer; SENSE sets ±0.5V/±1V input range. |
| VCM | 1.5V buffered common-mode reference | Provides precise 1.5V bias for differential drivers; requires ≥2.2µF local bypass. |
| OVDD, OGND | Digital output supply and ground | Decouples output driver power domain from analog VDD/GND - essential for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | ±0.5V to ±1V differential via SENSE pin - eliminates need for external gain stages in multi-range systems. |
| Low aperture jitter | 0.2psRMS - limits SNR degradation to <0.1dB at 70MHz input frequency. |
| Separate analog/digital supplies | VDD (2.85V–3.4V) and OVDD (0.5V–3.6V) - enables mixed-voltage system integration without level translators. |
| Integrated clock duty cycle stabilizer | Enables full-performance operation with 40%–60% input clock duty cycle - relaxes clock generator design constraints. |
| Low-power operational modes | Nap mode (15mW) and shutdown (2mW) - extends battery life in portable instrumentation and handheld ultrasound devices. |
Applications
| Wireless Base Station IF Sampling | Medical Ultrasound Beamforming |
|---|---|
Use Scenario: Digitizing 40–60MHz IF signals from quadrature demodulators in LTE/FDD base station receivers. IC Role / Device Role / Timing Role: High-speed ADC capturing complex baseband I/Q data with minimal harmonic distortion and spurious content. Use Value: 88dB SFDR ensures adjacent-channel interference remains below –88dBc, meeting 3GPP ACLR requirements without additional filtering. | Use Scenario: Receiving echo signals from 5–15MHz transducer arrays in portable ultrasound scanners. IC Role / Device Role / Timing Role: Front-end digitizer converting analog beamformed RF echoes into digital samples for FPGA-based beam processing. Use Value: 70.2dB SNR preserves weak tissue echo contrast; 105Msps sampling supports 12-bit depth at 15MHz center frequency with oversampling gain. |
| Portable Spectrum Analyzers | High-Speed Data Acquisition Systems |
Use Scenario: Real-time FFT-based spectral monitoring in handheld RF field analyzers operating up to 100MHz span. IC Role / Device Role / Timing Role: Core ADC providing wide instantaneous bandwidth and low noise floor for real-time signal analysis. Use Value: 640MHz full-power bandwidth allows direct sampling of VHF/UHF bands; low 320mW power enables battery operation for >4 hours. | Use Scenario: Multi-channel oscilloscope front-end capturing transient waveforms in automated test equipment. IC Role / Device Role / Timing Role: Precision digitizer delivering deterministic latency (5 cycles) and repeatable timing for trigger-synchronized acquisition. Use Value: ±0.3LSB INL ensures accurate amplitude measurement across full scale; pin-compatible family simplifies design reuse across 25–125Msps variants. |
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-105 | 12-bit, 105Msps, 3.3V supply, 650MHz input bandwidth, 70dB SNR, no integrated duty cycle stabilizer | Requires external clock conditioning; higher 450mW power dissipation | Preferred when legacy ADI ecosystem integration or JESD204B interface is required; not pin-compatible. |
| LTC2254CUH#PBF | 14-bit, 105Msps, same QFN-32 package, identical pinout and control logic, 73.5dB SNR, 85dB SFDR | Higher resolution but lower SFDR; same power (325mW) and feature set | Drop-in upgrade path for improved ENOB where SFDR margin permits; shares layout, firmware, and power delivery. |
Compared with AD9226BCPZ-105, LTC2252CUH#PBF offers lower power and built-in clock stabilization; compared with LTC2254CUH#PBF, it trades 2 bits of resolution for 3dB better SFDR and identical footprint - making it optimal for spurious-sensitive IF sampling.
Availability
LTC2252CUH#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, portable instrumentation, and test equipment requiring stable component supply and long-term obsolescence management.
Supply support for LTC2252CUH#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2252CUH#PBF belongs to the LTC225x family of ultra-low-power, high-speed pipeline ADCs engineered specifically for demanding communications and imaging applications where SNR, SFDR, and power efficiency are co-optimized.
FAQ
What is the maximum input frequency supported by the LTC2252CUH#PBF before SNR degrades significantly?
The LTC2252CUH#PBF maintains 70.2dB SNR up to 30MHz input frequency and sustains 68dB SNR at 70MHz input (–1dBFS, 2V range). Its 640MHz full-power bandwidth ensures usable response well beyond Nyquist, but SNR rolls off gradually above 70MHz due to aperture jitter and internal noise folding - typical design practice limits fundamental input to ≤52.5MHz for consistent >69dB SNR.
Does the LTC2252CUH#PBF support single-ended analog input configurations?
Yes, the LTC2252CUH#PBF supports single-ended input: connect AIN+ to the signal and AIN– to VCM (1.5V). However, this degrades harmonic distortion (SFDR drops ~3–5dB) and INL (±0.5LSB max), while preserving SNR and DNL. Differential drive is strongly recommended for all high-performance applications.
How does the MODE pin affect the output format and clock functionality of the LTC2252CUH#PBF?
The MODE pin on the LTC2252CUH#PBF configures both output coding and clock duty cycle stabilization: grounding MODE selects offset binary with stabilizer off; applying 1/3 VDD selects offset binary with stabilizer on; 2/3 VDD selects 2's complement with stabilizer on; VDD selects 2's complement with stabilizer off. This dual function enables flexible timing and data interface design.
What is the purpose of the SENSE pin on the LTC2252CUH#PBF, and how is it used?
The SENSE pin on the LTC2252CUH#PBF programs the full-scale differential input range: connecting SENSE to VCM selects ±0.5V (1Vpp); to VDD selects ±1V (2Vpp); or to an external voltage between 0.5V and 1V selects ±VSENSE. This eliminates external gain-setting resistors and enables dynamic range adaptation in software-configurable systems.
Can the LTC2252CUH#PBF operate with different OVDD voltages, and what are the implications?
Yes, the LTC2252CUH#PBF supports OVDD from 0.5V to 3.6V, allowing direct interfacing with 1.8V, 2.5V, or 3.3V logic families. Output drive strength scales with OVDD: at 1.8V, VOH ≥1.79V and VOL ≤0.09V under 1.6mA load; at 3.3V, VOH ≥2.99V and VOL ≤0.4V. This flexibility reduces BOM count and simplifies level-shifting in mixed-voltage systems.
LTC2252CUH#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):
- 105M
- 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:
- 2.85V ~ 3.4V
- Voltage - Supply, Digital:
- 2.85V ~ 3.4V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2252CUH#PBF FAQ
1.How can I place an order for LTC2252CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2252CUH#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 LTC2252CUH#PBF reliable?
The price and inventory of LTC2252CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2252CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2252CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2252CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2252CUH#PBF?
LTC2252CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2252CUH#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 LTC2252CUH#PBF?
For technical support, including LTC2252CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2252CUH#PBF requirements.
6.How does Aetrix verify that LTC2252CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2252CUH#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 LTC2252CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2252CUH#PBF?
All LTC2252CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2252CUH#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 LTC2252CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2252CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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