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Analog Devices Inc. LTC2237IUH#TRPBF
- Part No.:
- LTC2237IUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2237IUH#TRPBF.pdf
- Description:
- IC ADC 10BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,851
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Product details
Overview
LTC2237IUH#TRPBF from Analog Devices (formerly Linear Technology) is a 10-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 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 LTC2237IUH#TRPBF datasheet, LTC2237IUH#TRPBF pinout, LTC2237IUH#TRPBF application, or LTC2237IUH#TRPBF equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and confirmed alternative options for high-speed data acquisition design.
Technical Context
The LTC2237IUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and no missing codes across temperature. Its internal clock duty cycle stabilizer enables consistent AC performance over wide input clock duty cycle variation, while the flexible SENSE and MODE pins configure input range (±0.5V/±1V) and output format (offset binary or 2's complement).
It integrates a 1.5V VCM reference buffer, on-chip reference amplification, and separate analog/digital supplies (VDD and OVDD) supporting 0.5V–3.6V logic interfacing. The analog input path uses differential sampling with 4pF internal capacitors and exhibits 80dB common-mode rejection ratio and 0.07LSBRMS transition noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, guaranteed no missing codes - ensures monotonicity and simplifies post-processing in spectral analysis. |
| Sampling Rate | 40Msps - supports baseband digitization of signals up to 20MHz without aliasing per Nyquist criterion. |
| SNR @ 5MHz | 61.8dBFS - enables >10 effective bits of dynamic resolution for low-noise receiver front-ends. |
| SFDR @ 5MHz | 85dBc - suppresses spurious tones critical for multi-carrier wireless and ultrasound beamforming. |
| Power Dissipation | 120mW at 40Msps - allows thermal management in space-constrained portable instrumentation. |
| Input Bandwidth | 575MHz full-power - accommodates wideband IF sampling in cable modems and radar receivers. |
| INL / DNL | ±0.5LSB / ±0.5LSB max - ensures accurate amplitude fidelity in medical imaging pixel calibration. |
Pinout & Package
32-pin (5mm × 5mm) 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 pair | Accepts ±0.5V to ±1V swing around 1.5V common mode; driven differentially for optimal SFDR. |
| REFH, REFL | ADC reference voltage terminals | Shorted externally and bypassed with 0.1µF + 2.2µF ceramics; define full-scale range with SENSE. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; duty cycle stabilizer active when MODE = 1/3 VDD or 2/3 VDD. |
| SHDN, OE | Power mode control inputs | SHDN=VDD + OE=GND → Nap mode (15mW); SHDN=VDD + OE=VDD → Shutdown (2mW). |
| D0–D9 | Parallel digital outputs (D9 = MSB) | CMOS-compatible; output voltage swing referenced to OVDD (0.5V–3.6V selectable). |
| SENSE | Input range programming pin | VCM → ±0.5V range; VDD → ±1V range; external voltage → ±VSENSE range (0.5V–1V). |
| MODE | Output format & stabilizer control | GND → offset binary, stabilizer off; 2/3 VDD → 2's complement, stabilizer on. |
| OF | Over/underflow flag | Active-high pulse indicates input exceeded selected full-scale range during conversion. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | Configurable ±0.5V to ±1V via SENSE pin - adapts to varying signal chain gain without external attenuators. |
| Integrated clock duty cycle stabilizer | Enables full 40Msps performance with 30%–70% input clock duty cycle - relaxes clock generator requirements. |
| Separate output supply (OVDD) | Supports 0.5V–3.6V logic interface - enables direct connection to FPGA I/O banks or low-voltage microcontrollers. |
| Low power shutdown & nap modes | 2mW shutdown and 15mW nap mode - extends battery life in portable test equipment between acquisitions. |
| On-chip 1.5V VCM reference | Stable ±25ppm/°C bias source - eliminates need for external common-mode driver in transformer-coupled inputs. |
Applications
| Ultrasound Imaging | Wireless Baseband Receiver |
|---|---|
Use Scenario: Digitizing RF echo signals from phased-array transducers after analog beamforming. IC Role / Device Role / Timing Role: High-fidelity IF sampling ADC capturing 10–20MHz bandwidth echoes with minimal harmonic distortion. Use Value: 85dB SFDR prevents intermodulation artifacts from masking weak tissue reflections in B-mode imaging. |
Use Scenario: Direct-conversion receiver digitizing zero-IF or low-IF signals in LTE/WiMAX infrastructure. IC Role / Device Role / Timing Role: 40Msps baseband ADC with precise DC offset handling and low INL for I/Q channel matching. Use Value: ±0.5LSB INL ensures <0.1° phase error between I and Q paths, preserving EVM in 64-QAM demodulation. |
| Portable Spectrum Analyzer | Industrial Nondestructive Testing (NDT) |
Use Scenario: Battery-powered handheld analyzer requiring real-time FFT processing of 0–20MHz spectrum. IC Role / Device Role / Timing Role: Low-power, high-SNR ADC enabling 100dB dynamic range in compact form factor. Use Value: 61.8dB SNR at 40Msps supports detection of –100dBm signals amid thermal noise floor in 1kHz RBW. |
Use Scenario: Digitizing ultrasonic pulse-echo waveforms from piezoelectric transducers in weld inspection. IC Role / Device Role / Timing Role: Time-of-flight measurement ADC with deterministic 5-cycle latency and aperture jitter <0.2ps RMS. Use Value: 0.07LSBRMS transition noise enables sub-millimeter resolution in thickness gauging applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9226ASTZ-40 | 12-bit, 40Msps, 3.3V supply, 70dB SNR, no integrated VCM or duty cycle stabilizer | Higher resolution but lower SNR; requires external common-mode generation and clock conditioning | Choose when 12-bit precision outweighs SNR and integration trade-offs in DC-coupled systems |
| LTC2227IUH#TRPBF | 12-bit, 40Msps, same package/pinout, 69.5dB SNR, 82dB SFDR, 145mW power | Same footprint and timing, but higher resolution at cost of 20% lower SFDR and 21% higher power | Choose when system requires 12-bit linearity for calibration-sensitive applications, accepting SFDR reduction |
Compared with AD9226ASTZ-40 and LTC2227IUH#TRPBF, the LTC2237IUH#TRPBF delivers superior SFDR and integrated clock stabilization for demanding RF applications, while offering lower power than the 12-bit LTC2227IUH#TRPBF and greater ease of use than the AD9226ASTZ-40 due to on-chip VCM and flexible reference control.
Availability
LTC2237IUH#TRPBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable spectrum analyzers, and industrial NDT equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC2237IUH#TRPBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs for precision and high-speed applications.
The LTC2237IUH#TRPBF belongs to the LTC223x family of low-power, high-SFDR pipeline ADCs designed specifically for demanding communications, medical imaging, and instrumentation where dynamic range and power efficiency are co-critical.
FAQ
What is the operating temperature range for the LTC2237IUH#TRPBF?
The LTC2237IUH#TRPBF is rated for industrial operation from –40°C to +85°C (I-grade), as confirmed by Absolute Maximum Ratings and parameter tables in the official datasheet. This range applies to all key specifications including SNR, SFDR, INL, and power consumption.
Does the LTC2237IUH#TRPBF support single-ended analog input?
Yes, the LTC2237IUH#TRPBF supports single-ended input: drive AIN+ with the signal and tie AIN– to VCM (1.5V). However, harmonic distortion and INL degrade versus differential drive, while SNR and DNL remain unchanged - a documented trade-off per the datasheet Applications Information section.
How does the MODE pin affect output format and clock stabilization in the LTC2237IUH#TRPBF?
The MODE pin configures both output coding and clock duty cycle stabilization: GND selects offset binary with stabilizer off; 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 - all states are explicitly defined in the Pin Functions table.
What is the purpose of the OF (Over/Under Flow) pin on the LTC2237IUH#TRPBF?
The OF pin is an active-high flag that pulses high whenever the analog input exceeds the selected full-scale range (±VSENSE), indicating saturation. It is asynchronous and can be used to trigger automatic gain control or alert firmware of clipping events during acquisition - detailed in the Pin Functions section.
Can the LTC2237IUH#TRPBF interface directly with a 1.8V FPGA I/O bank?
Yes, the LTC2237IUH#TRPBF supports 1.8V logic interfacing via its dedicated OVDD supply pin. When OVDD = 1.8V, VOH is guaranteed ≥1.79V and VOL ≤0.09V at 1.6mA sink current - meeting standard 1.8V CMOS input thresholds without level-shifting circuitry.
LTC2237IUH#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2237IUH#TRPBF FAQ
1.How can I place an order for LTC2237IUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2237IUH#TRPBF 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 LTC2237IUH#TRPBF reliable?
The price and inventory of LTC2237IUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2237IUH#TRPBF is usually 5 days.
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LTC2237IUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2237IUH#TRPBF 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 LTC2237IUH#TRPBF?
For technical support, including LTC2237IUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2237IUH#TRPBF requirements.
6.How does Aetrix verify that LTC2237IUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2237IUH#TRPBF 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 LTC2237IUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2237IUH#TRPBF?
All LTC2237IUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2237IUH#TRPBF, 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 LTC2237IUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC2237IUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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