My Inquiry
My Account
Analog Devices Inc. LTC2238CUH#PBF
- Part No.:
- LTC2238CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2238CUH#PBF.pdf
- Description:
- IC ADC 10BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:119
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2238CUH#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 65Msps low-noise analog-to-digital converter optimized for high-frequency signal digitization in communications and imaging systems. It operates from a single 3V supply (2.7V–3.4V), delivers 61.8dB SNR and 85dB SFDR at Nyquist, supports flexible ±0.5V to ±1V differential input range, and features a 575MHz full-power bandwidth sample-and-hold stage.
For engineers reviewing the LTC2238CUH#PBF datasheet, LTC2238CUH#PBF pinout, LTC2238CUH#PBF application, or LTC2238CUH#PBF equivalent, key selection criteria include its 65Msps sampling rate, 3V-only analog supply with independent OVDD output driver rail, clock duty cycle stabilizer, shutdown/nap modes, and QFN-32 package compatibility with pin-matched family members including LTC2237 and LTC2236.
Technical Context
The LTC2238CUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and no missing codes. Its sample-and-hold front-end uses differential NMOS-switched 4pF sampling capacitors and supports both differential and single-ended input drive configurations.
Internal reference generation provides a stable 1.5V VCM bias with ±25ppm/°C tempco, while flexible SENSE pin programming enables ±0.5V, ±1V, or user-defined input ranges. The clock duty cycle stabilizer allows high AC performance across wide input clock duty cycles without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, guaranteed no missing codes - ensures monotonic transfer function for precision measurement applications. |
| Sampling Rate | 65Msps - supports digitization of signals up to 32.5MHz (Nyquist) in baseband or IF-sampling architectures. |
| SNR @ 5MHz | 61.8dBFS - defines minimum detectable signal level above quantization + thermal noise floor. |
| SFDR @ 5MHz | 85dBc - determines largest spurious tone relative to full-scale input, critical for spectral purity in comms receivers. |
| Input Bandwidth | 575MHz - enables direct RF sampling of UHF bands without external pre-filtering or downconversion. |
| Power Dissipation | 205mW @ 65Msps - enables thermally constrained portable or high-channel-count systems with minimal cooling overhead. |
| INL / DNL | ±0.5LSB / ±0.5LSB - ensures accurate amplitude linearity for medical imaging and test equipment waveform fidelity. |
Pinout & Package
The LTC2238CUH#PBF is housed in a 32-pin, 5mm × 5mm plastic QFN package with exposed thermal pad (Pin 33 = GND). The package requires soldering of the exposed pad to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±0.5V to ±1V differential signal; common-mode voltage referenced to VCM (1.5V). |
| REFH, REFL | ADC reference high/low terminals | Shorted externally; define full-scale range with internal reference or support external reference configuration. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; supports duty cycle stabilizer to relax clock source requirements. |
| SHDN, OE | Shutdown and output enable control | Enable nap mode (15mW), shutdown (2mW), or normal operation with tri-state outputs. |
| D0–D9 | Parallel CMOS digital outputs | MSB-first offset binary or 2's complement format; driven by separate OVDD rail (0.5V–3.6V). |
| MODE, SENSE | Configuration pins | MODE selects output format and duty cycle stabilizer; SENSE sets input range and reference source. |
| VCM | 1.5V common-mode bias output | Provides precise DC bias for differential drivers; must be bypassed with ≥2.2µF capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | ±0.5V to ±1V via SENSE pin - eliminates need for external gain stages in multi-range instrumentation. |
| Integrated clock duty cycle stabilizer | Enables full 65Msps performance with 40%–60% input clock duty cycle - reduces jitter sensitivity and simplifies clock tree design. |
| Low power consumption modes | 2mW shutdown and 15mW nap mode - extends battery life in portable ultrasound or handheld spectrum analyzers. |
| Independent output supply (OVDD) | 0.5V–3.6V logic interface - allows direct connection to 1.8V, 2.5V, or 3.3V FPGA/ASIC I/O without level shifters. |
| 575MHz full-power analog bandwidth | Supports direct sampling of L-band RF (1–2GHz) with undersampling techniques - reduces system component count and BOM cost. |
Applications
| Wireless Base Station Receiver | Medical Ultrasound Imaging |
|---|---|
Use Scenario: Digitizing 70MHz IF signals from quadrature demodulators in LTE/FDD-TDD infrastructure radios. IC Role / Device Role / Timing Role: High-speed ADC capturing complex baseband I/Q data with 85dB SFDR to preserve adjacent channel interference rejection. Use Value: 61.8dB SNR ensures >10-bit ENOB at 70MHz input, enabling 256-QAM demodulation without additional analog filtering. | Use Scenario: Sampling echo return signals from 5–15MHz transducer arrays in portable ultrasound machines. IC Role / Device Role / Timing Role: Low-noise digitizer interfacing with analog beamformer ASICs; synchronized to programmable 65Msps clock for depth resolution control. Use Value: 575MHz input bandwidth supports harmonic imaging modes without aliasing; 205mW power enables fanless handheld enclosure design. |
| Portable Spectrum Analyzer | High-Speed Data Acquisition System |
Use Scenario: Real-time FFT-based spectral monitoring in field-deployable RF interference detectors operating up to 140MHz. IC Role / Device Role / Timing Role: Primary ADC feeding FPGA-based digital downconverter and 8192-point FFT engine. Use Value: No missing codes and ±0.5LSB INL guarantee amplitude accuracy across full dynamic range for calibrated dBm measurements. | Use Scenario: Multi-channel oscilloscope front-end capturing transient waveforms in automated test equipment with 100+ MS/s aggregate throughput. IC Role / Device Role / Timing Role: Precision digitizer with parallel LVCMOS outputs synchronized to FPGA fabric for real-time trigger and memory management. Use Value: Independent OVDD rail allows direct 1.8V FPGA I/O interface, eliminating level-shifter components and reducing board area by 12%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9215BRUZ-65 | 10-bit, 65Msps, 3.3V supply, 62dB SNR, 80dB SFDR, TSSOP-28 package | Lacks clock duty cycle stabilizer and flexible input range; lower SFDR limits spectral purity in dense RF environments | Select when footprint constraints favor TSSOP and SFDR >80dB is sufficient for target signal density |
| LTC2228CUH#PBF | 12-bit, 65Msps, same QFN-32 package, 69.5dB SNR, 88dB SFDR, higher power (340mW) | Higher resolution and dynamic range but increased thermal load and power supply demands | Select when ENOB >11 bits is required for high-fidelity imaging or radar pulse analysis |
Compared with AD9215BRUZ-65 and LTC2228CUH#PBF, the LTC2238CUH#PBF offers optimal balance of 65Msps speed, 61.8dB SNR, 85dB SFDR, and ultra-low 205mW power in a compact QFN-making it ideal for thermally constrained, medium-dynamic-range applications where clock flexibility and input range adaptability are critical.
Availability
LTC2238CUH#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, portable instrumentation, and spectral analysis applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2238CUH#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 LTC2238CUH#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding digitization tasks in communications receivers, ultrasound systems, and portable test equipment where low power, high SFDR, and flexible input configuration are essential.
FAQ
What is the maximum input frequency supported by the LTC2238CUH#PBF before aliasing occurs?
The LTC2238CUH#PBF has a 575MHz full-power analog bandwidth and is specified for sampling at 65Msps. Aliasing begins at half the sampling rate (32.5MHz) per Nyquist theory; however, the device can be used in undersampling applications up to ~140MHz input frequency with proper anti-alias filtering and system-level design validation. The LTC2238CUH#PBF maintains 61.6dB SNR and 85dB SFDR at 140MHz input under –1dBFS conditions.
Does the LTC2238CUH#PBF require an external reference voltage?
No, the LTC2238CUH#PBF includes an internal 1.5V reference and VCM buffer, enabling operation with only the SENSE pin configured for ±0.5V or ±1V input range. An external reference may be applied via REFL/REFH if tighter accuracy or custom scaling is needed, but it is not required for standard operation. The LTC2238CUH#PBF achieves ±0.5LSB INL using its internal reference over temperature.
How does the MODE pin affect output data format and clock functionality in the LTC2238CUH#PBF?
The MODE pin on the LTC2238CUH#PBF selects both output coding format and clock duty cycle stabilizer state: grounding MODE enables offset binary output with stabilizer disabled; applying 1/3 VDD enables offset binary with stabilizer active; 2/3 VDD selects 2's complement with stabilizer active; and tying to VDD selects 2's complement with stabilizer disabled. This dual-function pin eliminates external configuration logic and simplifies PCB layout for the LTC2238CUH#PBF.
Can the LTC2238CUH#PBF operate with a 1.8V OVDD supply while maintaining full-speed performance?
Yes, the LTC2238CUH#PBF supports OVDD from 0.5V to 3.6V and is fully characterized at 1.8V. At OVDD = 1.8V and 65Msps, output drive strength remains sufficient for driving 10pF loads with <5ns data access time and <8.5ns bus relinquish time after OE↓. The LTC2238CUH#PBF VOH/VOL specifications guarantee logic compatibility with 1.8V FPGA I/O banks without level translation.
What thermal management considerations apply to the LTC2238CUH#PBF in continuous 65Msps operation?
The LTC2238CUH#PBF has θJA = 34°C/W and TJMAX = 125°C. At 205mW dissipation, junction temperature rise is ~7°C above ambient in a typical 4-layer PCB with the exposed pad soldered to a 1-in² copper pour. To maintain reliability, keep ambient temperature below 85°C for industrial use; the LTC2238CUH#PBF C-grade version (0°C to 70°C) is rated for commercial environments with adequate airflow or minimal copper area.
LTC2238CUH#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:
- 10
- 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:
- -
LTC2238CUH#PBF FAQ
1.How can I place an order for LTC2238CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2238CUH#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 LTC2238CUH#PBF reliable?
The price and inventory of LTC2238CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2238CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2238CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2238CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2238CUH#PBF?
LTC2238CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2238CUH#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 LTC2238CUH#PBF?
For technical support, including LTC2238CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2238CUH#PBF requirements.
6.How does Aetrix verify that LTC2238CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2238CUH#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 LTC2238CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2238CUH#PBF?
All LTC2238CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2238CUH#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 LTC2238CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2238CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2238CUH#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
