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Analog Devices Inc. LTC2225CUH#PBF
- Part No.:
- LTC2225CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2225CUH#PBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:493
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Product details
Overview
LTC2225CUH#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 10 Msps low-power pipelined analog-to-digital converter operating from a single 3V supply (2.7V–3.4V), delivering 71.3 dB SNR and 90 dB SFDR at 5 MHz input - optimized for high-fidelity spectral analysis and portable instrumentation signal chains.
For engineers reviewing the LTC2225CUH#PBF datasheet, LTC2225CUH#PBF pinout, LTC2225CUH#PBF application, or LTC2225CUH#PBF equivalent, key selection factors include its 575 MHz full-power bandwidth, clock duty cycle stabilizer, flexible ±0.5V/±1V input range via SENSE pin, and 32-pin 5mm × 5mm QFN package with exposed ground pad.
Technical Context
The LTC2225CUH#PBF implements a six-stage CMOS pipelined ADC architecture with 5-cycle latency, supporting differential or single-ended analog inputs and offering programmable output format (offset binary or 2's complement) via the MODE pin. Its internal 1.5 V bandgap reference drives VCM and enables input ranges of ±0.5 V or ±1 V depending on SENSE pin voltage.
It features a dedicated clock duty cycle stabilizer (enabled via MODE pin biasing), shutdown and nap modes reducing power to 2 mW and 15 mW respectively, and separate OVDD (0.5 V–3.6 V) for logic-level flexibility. The sample-and-hold has 0.25 LSBRMS transition noise and 0.2 psRMS aperture jitter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in measurement-critical systems. |
| Sample Rate | 10 Msps maximum - supports Nyquist-limited baseband bandwidth up to 5 MHz for communications and imaging applications. |
| SNR / SFDR | 71.3 dB SNR and 90 dB SFDR at 5 MHz - enables high dynamic range digitization of weak signals amid strong interferers. |
| Power Dissipation | 60 mW typical at 10 Msps - allows thermal-constrained portable and battery-assisted instrumentation designs. |
| Input Bandwidth | 575 MHz full-power bandwidth - preserves fidelity of fast-rising RF and IF signals without external anti-alias filtering penalties. |
| INL / DNL | ±0.3 LSB INL and ±0.15 LSB DNL (typ) - ensures accurate amplitude linearity for precision spectroscopy and calibration-grade acquisition. |
| Supply Range | 2.7 V–3.4 V analog supply (VDD); 0.5 V–3.6 V digital output supply (OVDD) - decouples logic interface voltage from analog rail for mixed-voltage system integration. |
Pinout & Package
Package: 32-lead (5 mm × 5 mm) plastic QFN with exposed GND pad (Pin 33), requiring soldering to PCB for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±0.5 V or ±1 V differential signal centered at 1.5 V common mode; supports transformer or amplifier drive topologies. |
| REFH, REFL | ADC reference high/low terminals | Internally generated differential reference; must be shorted in pairs and bypassed with 0.1 µF + 2.2 µF ceramics per datasheet layout rules. |
| VDD (Pins 7, 32) | Analog supply | Single 3 V rail powers core ADC and S/H; requires local 0.1 µF ceramic bypassing at each pin. |
| CLK | Sampling clock input | Single-ended CMOS/TTL-compatible; rising edge initiates sampling; duty cycle stabilizer optional via MODE pin. |
| SHDN, OE | Power management control | SHDN + OE combination selects normal, nap (15 mW), or shutdown (2 mW) modes - critical for power-gated systems. |
| D0–D11 | Parallel digital outputs | 12-bit MSB-first parallel data bus; output voltage swing referenced to OVDD (configurable 0.5–3.6 V). |
| MODE | Output format & stabilizer control | Selects offset binary/2's complement and enables/disables clock duty cycle stabilizer via resistive divider to VDD/GND. |
| SENSE | Input range programming | Setting SENSE = VCM selects ±0.5 V range; SENSE = VDD selects ±1 V range - directly configures full-scale without external components. |
| VCM | 1.5 V common-mode output | Provides precise DC bias for external driver circuits; must be bypassed with ≥2.2 µF ceramic capacitor to GND. |
| OF | Over/underflow flag | Active-high indicator when input exceeds ±1 V (2 V range) or ±0.5 V (1 V range) - enables real-time clipping detection. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | ±0.5 V or ±1 V differential full-scale set by SENSE pin voltage - eliminates need for external gain stages in multi-range instruments. |
| Integrated clock duty cycle stabilizer | Enables high AC performance with non-50% input clocks via internal PLL - removes external clock conditioning circuitry in space-constrained designs. |
| Low-power operation modes | Shutdown (2 mW) and nap (15 mW) states reduce system power during idle intervals - extends battery life in portable test equipment. |
| Separate digital output supply (OVDD) | Supports interfacing to 1.8 V, 2.5 V, or 3.3 V logic without level shifters - simplifies integration into heterogeneous digital subsystems. |
| On-chip 1.5 V reference and VCM generator | Provides stable common-mode bias and reference for external drivers - improves noise immunity and reduces component count in differential front-ends. |
Applications
| Wireless Communication Receivers | Portable Spectrum Analyzers |
|---|---|
Use Scenario: Digitizing IF signals in handheld SDR receivers operating in 10–100 MHz bands with limited power budget and board area. IC Role / Device Role / Timing Role: Primary ADC capturing baseband or low-IF samples with minimal external support circuitry. Use Value: 575 MHz input bandwidth and 71.3 dB SNR enable clean capture of wideband modulated signals without image-reject filtering overhead. | Use Scenario: Real-time FFT-based frequency analysis in field-deployable spectrum monitoring tools requiring battery operation. IC Role / Device Role / Timing Role: High-fidelity digitizer feeding FPGA-based FFT engines with deterministic 5-cycle pipeline latency. Use Value: No missing codes and ±0.3 LSB INL ensure amplitude accuracy across full dynamic range for calibrated spectral measurements. |
| Medical Ultrasound Beamformers | Industrial Condition Monitoring Sensors |
Use Scenario: Channel digitization in portable ultrasound probes where size, power, and SNR directly impact image resolution. IC Role / Device Role / Timing Role: Low-noise, low-power ADC per receive channel synchronized to master clock with minimal jitter. Use Value: 0.2 psRMS aperture jitter and 90 dB SFDR preserve harmonic content of echo returns for high-contrast B-mode imaging. | Use Scenario: Vibration and acoustic emission sensing in predictive maintenance gateways with multi-sensor aggregation. IC Role / Device Role / Timing Role: Precision ADC for high-resolution time-domain waveform capture of mechanical transients. Use Value: 12-bit resolution with ±0.15 LSB DNL ensures faithful representation of low-amplitude fault signatures amid broadband noise. |
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, 10 Msps, 70.5 dB SNR, 3.3 V supply only, no internal reference, 48-pin HTQFP | Requires external reference and driver; higher pin count increases PCB area and routing complexity | Choose if existing design uses TI ecosystem and needs pin-compatible upgrade path within ADS52xx family |
| MAX1127EUB+ | 12-bit, 10 Msps, 69.5 dB SNR, 2.7–3.6 V supply, integrated reference, 10-bit-compatible 32-pin QFN | Slightly lower SNR and SFDR; lacks clock duty cycle stabilizer and nap mode | Choose for cost-sensitive industrial DAQ where 1.8 dB SNR margin is acceptable and duty cycle stabilization is unnecessary |
Compared with ADS5273IPFP and MAX1127EUB+, the LTC2225CUH#PBF delivers superior SNR/SFDR, integrated clock stabilization, and lower power in identical 32-pin QFN packaging - making it optimal for portable, high-fidelity acquisition where signal integrity and board space are constrained.
Availability
LTC2225CUH#PBF is available at Aetrix Electronics and suitable for wireless communication receivers, portable spectrum analyzers, and medical ultrasound beamformers requiring stable component supply across extended production lifecycles.
Supply support for LTC2225CUH#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 precision instrumentation, communications, and industrial markets.
The LTC2225CUH#PBF belongs to ADI's high-speed precision ADC product line, engineered for demanding applications requiring low power, high SNR, and flexible interface options in compact packages.
FAQ
What is the operating temperature range for the LTC2225CUH#PBF?
The LTC2225CUH#PBF is rated for 0°C to 70°C ambient operation (C-grade). This is confirmed in the Absolute Maximum Ratings table where "LTC2225C" denotes the commercial temperature grade. It is not rated for industrial (–40°C to 85°C) or extended ranges unless explicitly ordered as LTC2225IUH#PBF.
Does the LTC2225CUH#PBF require external reference components?
No, the LTC2225CUH#PBF integrates a 1.5 V bandgap reference and programmable differential reference buffers. External components are only required for bypassing: 0.1 µF + 2.2 µF ceramics on REFH/REFL and ≥2.2 µF on VCM. No external reference IC or resistor network is needed for standard ±0.5 V or ±1 V operation.
How does the MODE pin affect the LTC2225CUH#PBF functionality?
The MODE pin on the LTC2225CUH#PBF controls both output data format (offset binary or 2's complement) and clock duty cycle stabilizer enable/disable. Ground = offset binary + stabilizer off; 1/3 VDD = offset binary + stabilizer on; 2/3 VDD = 2's complement + stabilizer on; VDD = 2's complement + stabilizer off - all configurations are validated in the Functional Description section.
Can the LTC2225CUH#PBF operate with a single-ended analog input?
Yes, the LTC2225CUH#PBF supports single-ended drive: connect AIN+ to signal and AIN– to VCM (1.5 V). However, this degrades harmonic distortion and INL while preserving SNR and DNL. The datasheet explicitly confirms this capability in the "Single-Ended Input" subsection of Applications Information.
What is the purpose of the OF (overflow) pin on the LTC2225CUH#PBF?
The OF pin on the LTC2225CUH#PBF is an active-high over/underflow flag that asserts when the analog input exceeds the selected full-scale range (±1 V for 2 V range, ±0.5 V for 1 V range). It provides real-time saturation detection without requiring post-processing, enabling immediate gain adjustment or alert generation in closed-loop systems.
LTC2225CUH#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):
- 10M
- 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:
- -
LTC2225CUH#PBF FAQ
1.How can I place an order for LTC2225CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2225CUH#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 LTC2225CUH#PBF reliable?
The price and inventory of LTC2225CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2225CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2225CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2225CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2225CUH#PBF?
LTC2225CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2225CUH#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 LTC2225CUH#PBF?
For technical support, including LTC2225CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2225CUH#PBF requirements.
6.How does Aetrix verify that LTC2225CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2225CUH#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 LTC2225CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2225CUH#PBF?
All LTC2225CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2225CUH#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 LTC2225CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2225CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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