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Analog Devices Inc. LTC2247CUH#PBF
- Part No.:
- LTC2247CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2247CUH#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:302
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Product details
Overview
LTC2247CUH#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 40Msps low-power analog-to-digital converter optimized for high-dynamic-range signal digitization in communications and imaging systems. It operates from a single 3V supply (2.7V–3.4V), delivers 74.4dB SNR and 90dB SFDR at 5MHz input, supports ±0.5V to ±1V differential input range, and features integrated clock duty cycle stabilization and shutdown modes.
For engineers reviewing the LTC2247CUH#PBF datasheet, LTC2247CUH#PBF pinout, LTC2247CUH#PBF application, or LTC2247CUH#PBF equivalent, key selection criteria include its 40Msps sampling rate, 32-pin QFN package with exposed thermal pad, flexible reference configuration via SENSE pin, and compatibility with 0.5V–3.6V logic-level output drivers.
Technical Context
The LTC2247CUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency. Its sample-and-hold circuit features 575MHz full-power bandwidth and <0.2psRMS aperture jitter, enabling accurate digitization of wideband RF and IF signals up to Nyquist frequency.
It supports dual reference modes-internal 1.5V VCM bias with programmable input range (±0.5V/±1V) or external reference via REFH/REFL pins-and includes dedicated MODE and SHDN/OE control for output format selection (offset binary or 2's complement) and power management (normal/nap/shutdown).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision measurement applications. |
| Sampling Rate | 40Msps - enables real-time digitization of baseband signals up to 20MHz without aliasing. |
| SNR | 74.4dB (typ, 5MHz input, –1dBFS) - supports >12 effective bits for high-fidelity spectral analysis. |
| SFDR | 90dB (typ, 5MHz input, –1dBFS) - suppresses spurious tones critical for multi-carrier wireless receivers. |
| Power Dissipation | 120mW (typ, 40Msps) - enables thermally constrained portable instrumentation designs. |
| Input Bandwidth | 575MHz full-power - allows direct sampling of L-band RF signals without downconversion. |
| INL / DNL | ±1LSB / ±0.5LSB (typ) - ensures linearity for calibration-sensitive medical ultrasound beamforming. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed thermal pad (Pin 33 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±0.5V to ±1V swing around 1.5V common-mode; must be driven differentially for optimal SFDR. |
| REFH, REFL | Reference voltage terminals | Shorted pairs; require 0.1µF + 2.2µF ceramic bypass to GND for stable 1.5V internal reference operation. |
| CLK | Single-ended sampling clock | Positive-edge triggered; supports duty cycle stabilizer (enabled via MODE pin) for robust timing across 30%–70% duty cycles. |
| SHDN, OE | Power and output control | SHDN=VDD + OE=GND → nap mode (15mW); SHDN=VDD + OE=VDD → shutdown (2mW); outputs always high-Z in low-power states. |
| D0–D13 | Parallel digital outputs | 14-bit MSB-first LVCMOS outputs; OVDD programmable from 0.5V to 3.6V to interface with FPGA I/O banks or ASIC logic. |
| SENSE | Input range programming | Connect to VCM → ±0.5V range; to VDD → ±1V range; to external 0.5–1V → ±VSENSE range. |
| VCM | 1.5V common-mode reference | Low-drift (±25ppm/°C), low-impedance (4Ω) output; must be bypassed with ≥2.2µF capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range | Programmable ±0.5V to ±1V differential input via SENSE pin - eliminates external gain stages in variable-sensitivity sensor interfaces. |
| Integrated clock stabilizer | Duty cycle stabilizer corrects clock asymmetry - maintains 74.4dB SNR even with 40%–60% CLK duty cycle, relaxing clock generator requirements. |
| Multi-mode power control | Three power states (normal/nap/shutdown) with 120mW/15mW/2mW dissipation - extends battery life in portable test equipment. |
| High-accuracy internal reference | 1.5V VCM with ±25ppm/°C tempco and 3mV/V line regulation - removes need for external reference IC in cost-sensitive designs. |
| Robust input protection | Clamped analog inputs tolerate –0.3V to (VDD + 0.3V); handles >100mA transient currents without latchup - improves system reliability in noisy industrial environments. |
Applications
| Wireless Baseband Receiver | Medical Ultrasound Beamformer |
|---|---|
Use Scenario: Digitizing 0–20MHz IF signals from quadrature demodulators in LTE/FDD receivers. IC Role / Device Role / Timing Role: Primary ADC capturing complex baseband I/Q data at 40Msps with precise phase coherence. Use Value: 90dB SFDR prevents adjacent-channel interference masking weak user signals; 575MHz input bandwidth supports direct IF sampling without image-reject filters. | Use Scenario: Converting echo return signals from phased-array transducers operating at 2–15MHz center frequencies. IC Role / Device Role / Timing Role: Channel ADC in multi-channel receive beamformer ASICs, synchronized to ultrasound pulse repetition timing. Use Value: ±1LSB INL ensures accurate time-of-flight calculation for sub-millimeter spatial resolution; low 1LSBRMS transition noise preserves tissue contrast. |
| Portable Spectrum Analyzer Front-End | Industrial Process Monitoring System |
Use Scenario: Capturing real-time RF spectra from 10kHz–20MHz for field-deployable EMI diagnostics. IC Role / Device Role / Timing Role: High-speed digitizer feeding FFT engine in ARM-based embedded analyzer platform. Use Value: 74.4dB SNR enables detection of –80dBm signals in presence of broadband noise; 120mW power enables 4-hour battery operation. | Use Scenario: Digitizing vibration, acoustic emission, or partial discharge signals from rotating machinery sensors. IC Role / Device Role / Timing Role: Precision ADC in condition-monitoring edge node, interfacing with isolation amplifiers and microcontroller. Use Value: No missing codes and ±0.5LSB DNL ensure faithful representation of transient fault signatures; 3V single-supply simplifies isolated power design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9240ASTZ-40 | 14-bit, 40Msps, 3.3V supply; SNR = 72dB, SFDR = 85dB; requires external reference and separate analog/digital supplies. | Lacks integrated clock stabilizer and internal VCM; higher system BOM cost and layout complexity. | Choose when legacy ADI ecosystem compatibility or extended temperature range (–40°C to +85°C industrial grade) is required. |
| LTC2246CUH#PBF | 14-bit, 25Msps variant in same QFN package; power = 75mW; SNR = 74.5dB (5MHz); identical pinout and feature set except lower speed. | Lower sampling rate limits usable bandwidth to 12.5MHz; suitable only where reduced throughput is acceptable. | Choose for ultra-low-power portable devices where 25Msps suffices and 45mW further power reduction is critical. |
Compared with AD9240ASTZ-40 and LTC2246CUH#PBF, the LTC2247CUH#PBF uniquely balances 40Msps throughput, integrated reference/VCM, clock stabilizer, and 120mW power - making it optimal for space-constrained, single-supply, high-SFDR applications like handheld spectrum analyzers and multi-channel ultrasound front-ends.
Availability
LTC2247CUH#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2247CUH#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 aerospace, industrial, automotive, and communications markets.
The LTC2247CUH#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding digitization tasks in communications receivers, medical ultrasound, and test equipment where dynamic range, low power, and integration are critical.
FAQ
What is the maximum input frequency supported by the LTC2247CUH#PBF before SNR degrades significantly?
The LTC2247CUH#PBF maintains 74.4dB SNR up to 12.5MHz input frequency (–1dBFS, 2V range). At 30MHz input, SNR drops to 72.5dB, and at 70MHz, it is 73.4dB - confirming its 575MHz full-power bandwidth supports wideband sampling well beyond Nyquist. Performance remains usable through 140MHz (71.9dB SNR), though SFDR declines above 30MHz.
Can the LTC2247CUH#PBF operate with a single 3.3V supply instead of the specified 3V nominal?
Yes, the LTC2247CUH#PBF supports 2.7V to 3.4V analog supply (VDD) per Absolute Maximum Ratings and Operating Conditions. At 3.3V, typical power dissipation increases to ~125mW, and all AC specs (SNR/SFDR) remain within datasheet limits - verified across the C-grade temperature range (0°C to 70°C).
How does the MODE pin configuration affect output data format and clock stabilizer function in the LTC2247CUH#PBF?
The MODE pin on the LTC2247CUH#PBF selects both output format and clock duty cycle stabilizer state: GND → 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. This dual-function pin reduces external control lines while enabling timing robustness where needed.
Is the exposed thermal pad (Pin 33) of the LTC2247CUH#PBF electrically connected to ground internally?
Yes, the exposed pad (Pin 33) of the LTC2247CUH#PBF is internally connected to analog ground (GND). Per datasheet Package Information, it must be soldered directly to a PCB ground plane for proper thermal dissipation (θJA = 34°C/W) and to minimize ground bounce that could degrade SNR and SFDR performance.
Does the LTC2247CUH#PBF support single-ended analog input, and what is the impact on performance?
Yes, the LTC2247CUH#PBF supports single-ended input (drive AIN+ with signal, tie AIN– to VCM = 1.5V), but this degrades harmonic distortion and INL. SNR and DNL remain unchanged per datasheet; however, SFDR drops ~5–10dB compared to differential drive due to increased even-order harmonics - making differential drive mandatory for communications and ultrasound applications.
LTC2247CUH#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:
- 14
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2247CUH#PBF FAQ
1.How can I place an order for LTC2247CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2247CUH#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 LTC2247CUH#PBF reliable?
The price and inventory of LTC2247CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2247CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2247CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2247CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2247CUH#PBF?
LTC2247CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2247CUH#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 LTC2247CUH#PBF?
For technical support, including LTC2247CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2247CUH#PBF requirements.
6.How does Aetrix verify that LTC2247CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2247CUH#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 LTC2247CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2247CUH#PBF?
All LTC2247CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2247CUH#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 LTC2247CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2247CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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