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Analog Devices Inc. LTC2237CUH#PBF
- Part No.:
- LTC2237CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2237CUH#PBF.pdf
- Description:
- IC ADC 10BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,188
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Product details
Overview
LTC2237CUH#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 40Msps low-power 3V analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in imaging and communications systems. It delivers 61.8dB SNR, 85dB SFDR at 5MHz input, ±0.1LSB typical INL, and operates from a single 2.7V–3.4V supply consuming only 120mW - enabling portable ultrasound and spectral analysis instrumentation.
For engineers reviewing the LTC2237CUH#PBF datasheet, LTC2237CUH#PBF pinout, LTC2237CUH#PBF application, or LTC2237CUH#PBF equivalent, this page provides verified specifications, validated QFN-32 pin functions, real-world use cases in medical imaging and broadband receivers, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LTC2237CUH#PBF implements a six-stage CMOS pipelined ADC architecture with integrated sample-and-hold, clock duty cycle stabilizer, and flexible reference programming via SENSE pin. Its 575MHz full-power bandwidth supports Nyquist-rate sampling of RF IF signals up to 200MHz while maintaining 61.8dB SNR across 5–30MHz inputs.
It features dual-mode output formatting (offset binary or 2's complement), programmable input range (±0.5V to ±1V), and three power states: active (120mW), nap mode (15mW), and shutdown (2mW). The internal 1.5V VCM buffer and separate OVDD rail (0.5V–3.6V) enable direct interfacing with FPGA or ASIC logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, no missing codes - guarantees monotonic transfer function for precision measurement systems. |
| Sample Rate | 40Msps - supports real-time digitization of baseband signals up to 20MHz per Nyquist criterion. |
| SNR | 61.8dB at 5MHz input - enables >10 effective bits of dynamic resolution in spectral analysis applications. |
| SFDR | 85dB at 5MHz input - suppresses spurious tones critical for multi-carrier wireless receiver front-ends. |
| Power Dissipation | 120mW at 40Msps - allows thermal design in compact portable instrumentation without forced cooling. |
| Input Bandwidth | 575MHz - accommodates wideband IF sampling in cable modems and software-defined radios. |
| INL / DNL | ±0.1LSB typ / ±0.05LSB typ - ensures linearity-critical performance in medical ultrasound beamforming. |
Pinout & Package
32-pin (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND); requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±0.5V to ±1V differential signal; common-mode bias set by VCM (1.5V) or external source. |
| REFH, REFL | ADC reference terminals | Shorted pairs requiring 0.1µF + 2.2µF ceramic bypass to GND; define full-scale range with SENSE pin. |
| CLK | Single-ended sampling clock | Positive-edge triggered; duty cycle stabilizer enabled via MODE pin improves jitter tolerance. |
| SHDN, OE | Power and output control | Combination controls nap mode (SHDN=H, OE=L) or high-Z outputs (SHDN=L, OE=H). |
| D0–D9 | Parallel digital outputs | MSB-first offset binary or 2's complement; driven by separate OVDD rail (0.5V–3.6V). |
| SENSE | Reference and input range select | Connect to VCM (±0.5V), VDD (±1V), or external voltage (±VSENSE) for programmable full-scale. |
| VCM | 1.5V common-mode bias output | Provides precise DC level for differential drivers; requires ≥2.2µF local bypass to GND. |
| OF | Over/underflow flag | Active-high pulse indicates input exceeding selected full-scale range - used for AGC feedback loops. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range | Programmable ±0.5V to ±1V differential full-scale via SENSE pin - eliminates external gain stages in multi-range instruments. |
| Low aperture jitter | 0.2ps RMS - preserves SNR when digitizing high-frequency IF signals up to 140MHz. |
| Integrated clock duty cycle stabilizer | Enables full 40Msps performance with non-50% clock duty cycles - relaxes clock generation requirements. |
| Three power modes | 120mW active / 15mW nap / 2mW shutdown - extends battery life in portable diagnostic equipment. |
| Separate output supply (OVDD) | 0.5V–3.6V logic interface - supports direct connection to 1.8V, 2.5V, or 3.3V FPGA I/O banks. |
Applications
| Ultrasound Imaging | Wireless Base Station Receivers |
|---|---|
|
Use Scenario: Digitizing echo return signals from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: High-speed ADC capturing time-of-flight data with sub-nanosecond timing accuracy for beamforming calculations. Use Value: 61.8dB SNR and ±0.1LSB INL ensure accurate amplitude mapping of tissue boundaries, improving image contrast resolution. |
Use Scenario: Sampling intermediate frequency (IF) outputs from quadrature demodulators in LTE/FDD receivers. IC Role / Device Role / Timing Role: 40Msps pipeline ADC converting 20MHz-wide IF bands centered at 70MHz or 140MHz. Use Value: 85dB SFDR prevents intermodulation distortion from adjacent channel interference, meeting 3GPP ACLR requirements. |
| Portable Spectrum Analyzers | Industrial Non-Destructive Testing (NDT) |
|
Use Scenario: Real-time FFT-based spectral monitoring in handheld RF field analyzers covering 1–100MHz. IC Role / Device Role / Timing Role: Digitizing downconverted RF signals with minimal harmonic distortion for accurate spectral signature identification. Use Value: 575MHz input bandwidth enables direct sampling of VHF/UHF bands without image-reject filtering. |
Use Scenario: Capturing ultrasonic pulse-echo waveforms from piezoelectric transducers inspecting weld integrity in pipelines. IC Role / Device Role / Timing Role: High-linearity ADC acquiring transient reflections with precise timing for flaw depth calculation. Use Value: No missing codes and low transition noise (0.07LSBRMS) ensure reliable detection of micro-cracks under noisy industrial conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2227CUH#PBF | 12-bit resolution, same 40Msps rate, 69.5dB SNR, 78dB SFDR, 145mW power | Better resolution for precision measurement; lower SFDR limits multi-tone receiver use | Select when ENOB > 11.5 bits is required and SFDR > 80dB suffices |
| AD9226ASTZ-40 | 12-bit, 40Msps, 70dB SNR, 85dB SFDR, 330mW power, 48-lead LQFP | Higher power and larger footprint; superior SFDR stability across temperature | Select for industrial environments requiring guaranteed 85dB SFDR over –40°C to +85°C |
Compared with LTC2237CUH#PBF, LTC2227CUH#PBF trades 2 bits of resolution for 24.5dB higher SFDR headroom but consumes 21mW more power, while AD9226ASTZ-40 offers identical SFDR with 12-bit fidelity at triple the power and board area - making LTC2237CUH#PBF optimal for portable, battery-sensitive 10-bit applications.
Availability
LTC2237CUH#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable spectrum analyzers, and wireless infrastructure receivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC2237CUH#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 industrial, automotive, communications, and healthcare markets.
The LTC2237CUH#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding digitization tasks in medical imaging, test equipment, and communications infrastructure where low power, high SNR, and small form factor are critical.
FAQ
What is the maximum input frequency supported by the LTC2237CUH#PBF while maintaining specified SNR?
The LTC2237CUH#PBF maintains 61.8dB SNR up to 30MHz input frequency and sustains 61.6dB SNR at 140MHz input, enabled by its 575MHz full-power bandwidth. This allows undersampling of IF signals in communications receivers without external bandpass filtering, directly supporting zero-IF and low-IF architectures in the LTC2237CUH#PBF design.
How does the SENSE pin configure input range on the LTC2237CUH#PBF?
The SENSE pin on the LTC2237CUH#PBF selects full-scale input range: tied to VCM yields ±0.5V, to VDD yields ±1V, and to an external voltage (0.5V–1V) sets ±VSENSE. This eliminates external resistive dividers or programmable gain amplifiers, simplifying front-end design for multi-range portable instrumentation using the LTC2237CUH#PBF.
Does the LTC2237CUH#PBF support single-ended analog input?
Yes, the LTC2237CUH#PBF supports single-ended input: drive AIN+ with signal and tie AIN– to VCM (1.5V). However, harmonic distortion and INL degrade slightly versus differential mode, while SNR and DNL remain unchanged - making it viable for cost-sensitive applications where THD < –70dB is acceptable, as confirmed in LTC2237CUH#PBF characterization data.
What is the pipeline latency of the LTC2237CUH#PBF and how does it affect system timing?
The LTC2237CUH#PBF has fixed 5-cycle pipeline latency from CLK edge to valid D0–D9 output. At 40Msps, this equals 125ns delay, which must be accounted for in FPGA-based time-critical applications like real-time beamforming or digital predistortion. The timing diagram in the LTC2237CUH#PBF datasheet specifies tD = 1.4–5.4ns and bus relinquish time = 3.3–8.5ns after OE↓.
Can the LTC2237CUH#PBF operate with a 1.8V OVDD supply for interfacing with modern FPGAs?
Yes, the LTC2237CUH#PBF supports OVDD from 0.5V to 3.6V, including 1.8V. At OVDD = 1.8V, VOH = 1.79V and VOL = 0.09V (IO = –200µA / 1.6mA), ensuring clean logic-level compatibility with Artix-7 or Cyclone V FPGA banks. This capability is explicitly characterized in the LTC2237CUH#PBF datasheet's Digital Outputs section.
LTC2237CUH#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):
- 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:
- -
LTC2237CUH#PBF FAQ
1.How can I place an order for LTC2237CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2237CUH#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 LTC2237CUH#PBF reliable?
The price and inventory of LTC2237CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2237CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC2237CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2237CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2237CUH#PBF?
LTC2237CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2237CUH#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 LTC2237CUH#PBF?
For technical support, including LTC2237CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2237CUH#PBF requirements.
6.How does Aetrix verify that LTC2237CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2237CUH#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 LTC2237CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC2237CUH#PBF?
All LTC2237CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2237CUH#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 LTC2237CUH#PBF part is unused and in its original packaging.
Return procedure for LTC2237CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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