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Analog Devices Inc. LTC2239CUH#TRPBF
- Part No.:
- LTC2239CUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2239CUH#TRPBF.pdf
- Description:
- IC ADC 10BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,165
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Product details
Overview
LTC2239CUH#TRPBF from Analog Devices (formerly Linear Technology) is a 10-bit, 80Msps low-noise pipelined ADC operating from a single 3V supply. It delivers 61.6dB SNR and 85dB SFDR at 70MHz input, features 575MHz full-power bandwidth, clock duty cycle stabilizer, and flexible ±0.5V to ±1V differential input range. It is used in ultrasound imaging front-ends requiring high dynamic range digitization of wideband analog signals.
For engineers reviewing the LTC2239CUH#TRPBF datasheet, LTC2239CUH#TRPBF pinout, LTC2239CUH#TRPBF application, or LTC2239CUH#TRPBF equivalent, key selection criteria include SNR/SFDR trade-offs across input frequency, internal reference programmability via SENSE pin, output voltage compatibility with 0.5V–3.6V logic, and thermal performance in 5mm × 5mm QFN packages for space-constrained medical and comms PCBs.
Technical Context
The LTC2239CUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic and integrated sample-and-hold. Its analog core accepts differential inputs referenced to VCM (1.5V), supports internal reference selection (±0.5V or ±1V range), and includes dedicated REFH/REFL pins with dual-pin configuration for low-inductance bypassing.
Digital interface uses parallel CMOS outputs (D0–D9, MSB-first), with separate OVDD (0.5V–3.6V) and OGND supplies enabling logic-level flexibility. Control functions include SHDN and OE pins for nap/shutdown modes (15mW/2mW power), MODE pin for offset binary/2's complement format selection, and clock duty cycle stabilizer to maintain AC performance across non-50% CLK duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - guarantees monotonic transfer function for precision measurement systems. |
| Sampling Rate | 80Msps - enables Nyquist-limited signal capture up to 40MHz, suitable for baseband and IF sampling in broadband receivers. |
| SNR @ 70MHz | 61.6dBFS - defines usable dynamic range for high-frequency sinusoidal inputs in spectral analysis applications. |
| SFDR @ 70MHz | 85dBc - indicates spurious-free resolution for multi-tone signals in wireless infrastructure and radar digitizers. |
| Full-Power Bandwidth | 575MHz - allows accurate digitization of fast-rising transients and wideband modulated signals without amplitude roll-off. |
| Power Dissipation | 211mW at 80Msps - enables thermally constrained designs in portable instrumentation and embedded medical devices. |
| INL / DNL | ±0.5LSB / ±0.5LSB over temperature - ensures linearity stability across industrial temperature range (0°C to 70°C). |
| Aperture Jitter | 0.2psRMS - contributes <0.3dB SNR degradation at 140MHz input, critical for high-frequency sampling fidelity. |
Pinout & Package
The LTC2239CUH#TRPBF is housed in a 32-lead (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 or ±1V swing around 1.5V common-mode; must be driven differentially for optimal SFDR. |
| REFH, REFL | ADC reference voltage terminals | Paired pins (REFH×2, REFL×2) minimize inductance; require local 0.1µF + 2.2µF ceramic bypassing to GND. |
| VDD (Pins 7, 32) | Analog supply | Single 2.7V–3.4V rail powers analog core; bypass each pin individually with 0.1µF capacitor. |
| CLK | Sampling clock input | Single-ended CMOS/TTL-compatible; rising edge initiates conversion; duty cycle stabilizer improves jitter tolerance. |
| SHDN, OE | Power management control | Combination selects normal (OE=L), high-Z output (OE=H), nap (SHDN=H, OE=L), or shutdown (SHDN=H, OE=H) mode. |
| D0–D9 | Parallel digital outputs | CMOS outputs with separate OVDD (0.5V–3.6V) supply; D9 = MSB; timing-critical path with 1.4–2.7ns CLK-to-data delay. |
| SENSE | Input range programming | Setting SENSE = VCM selects ±0.5V range; SENSE = VDD selects ±1V range; external voltage sets intermediate ranges. |
| VCM | 1.5V common-mode bias output | Provides stable DC level for transformer center-tap bias or op-amp driver reference; requires ≥2.2µF local bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | Programmable ±0.5V or ±1V differential input via SENSE pin - enables optimization of SNR vs SFDR based on signal amplitude. |
| Integrated clock duty cycle stabilizer | Compensates for non-50% CLK duty cycles without external circuitry - maintains 61.6dB SNR across 40%–60% duty cycle range. |
| Low-power nap and shutdown modes | 15mW nap mode (SHDN=H, OE=L) and 2mW shutdown (SHDN=H, OE=H) - extends battery life in portable diagnostic equipment. |
| Separate digital output supply (OVDD) | Supports 0.5V–3.6V logic interface - allows direct connection to FPGA I/O banks or microcontroller GPIO without level shifters. |
| On-chip 1.5V bandgap reference and VCM buffer | Stable 1.5V output with ±25ppm/°C tempco - eliminates need for external reference in cost-sensitive ultrasound front-ends. |
| 575MHz full-power analog bandwidth | Preserves signal integrity for fast transient capture in spectral analysis and RF test equipment up to UHF frequencies. |
Applications
| Ultrasound Imaging Front-End | Wireless Baseband Digitizer |
|---|---|
Use Scenario: Digitizing echo return signals from phased-array transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: Primary ADC capturing 5–15MHz RF echoes with >60dB SNR to support B-mode and Doppler processing. Use Value: 61.6dB SNR at 70MHz enables detection of low-amplitude tissue boundaries; 575MHz bandwidth preserves pulse shape fidelity for time-of-flight accuracy. | Use Scenario: Converting IF signals in LTE/WiMAX base station receivers before digital downconversion. IC Role / Device Role / Timing Role: High-speed digitizer interfacing with quadrature demodulator outputs at 20–40MHz IF. Use Value: 85dB SFDR suppresses adjacent-channel interference; flexible 1V/2V input range accommodates variable gain amplifier output levels. |
| Spectral Analysis Instrumentation | Portable RF Test Equipment |
Use Scenario: Real-time spectrum analysis in handheld analyzers measuring harmonic content of switching power supplies. IC Role / Device Role / Timing Role: Wideband ADC sampling up to 40MHz span with FFT-based post-processing. Use Value: No missing codes and ±0.5LSB INL ensure accurate amplitude calibration; low 0.08LSBRMS transition noise minimizes histogram binning errors. | Use Scenario: Signal acquisition in battery-powered RF field strength meters operating across 100kHz–300MHz. IC Role / Device Role / Timing Role: Low-power ADC digitizing downconverted signals with minimal thermal drift. Use Value: 211mW power at 80Msps enables >4-hour operation on Li-ion pack; 0°C–70°C grade supports outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2238CUH#TRPBF | 65Msps sampling rate, identical 10-bit resolution and QFN-32 package; 61.2dB SNR at 70MHz. | Lower sample rate limits Nyquist bandwidth to 32.5MHz - suitable for narrowband IF sampling where power reduction (180mW) is prioritized. | Select when system clock constraints or thermal budget require reduced throughput without sacrificing linearity or package compatibility. |
| AD9215BCPZ-80 | 10-bit, 80Msps ADC from Analog Devices; 63.5dB SNR, 82dB SFDR at 70MHz; uses 32-lead LFCSP (5mm × 5mm) but with different pinout. | Higher SNR but lower SFDR; lacks clock duty cycle stabilizer and internal VCM buffer - requires external reference and bias circuitry. | Choose when maximum SNR is critical and board layout can accommodate redesign for ADI's pin assignment and reference architecture. |
Compared with LTC2238CUH#TRPBF and AD9215BCPZ-80, the LTC2239CUH#TRPBF uniquely balances 80Msps throughput, integrated clock stabilization, and self-contained reference/VCM generation - reducing BOM count and layout complexity in compact medical and test equipment.
Availability
LTC2239CUH#TRPBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, wireless infrastructure baseband digitizers, portable spectral analyzers, and RF test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LTC2239CUH#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2239CUH#TRPBF belongs to ADI's high-speed pipeline ADC product line, designed specifically for demanding digitization tasks in medical imaging, broadband communications, and instrumentation where SNR, SFDR, and low power coexist under tight thermal and space constraints.
FAQ
What is the operating temperature range for the LTC2239CUH#TRPBF?
The LTC2239CUH#TRPBF is specified for the commercial temperature range of 0°C to 70°C. This grade is indicated by the "C" suffix in the part number and is validated per the datasheet's "LTC2239C" operating conditions. The device maintains ±0.5LSB INL/DNL and 61.6dB SNR across this full range when powered from 3V and configured for 2V input range.
Does the LTC2239CUH#TRPBF support single-ended analog input?
Yes, the LTC2239CUH#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 operation, while SNR and DNL remain unchanged. For optimal performance-especially SFDR above 70dB-the datasheet strongly recommends differential drive using transformers or high-speed amplifiers.
How does the SENSE pin configure the input range on the LTC2239CUH#TRPBF?
The SENSE pin on the LTC2239CUH#TRPBF programs the full-scale differential input range: tying SENSE to VCM selects ±0.5V (1VPP); tying to VDD selects ±1V (2VPP). Intermediate ranges (e.g., ±0.75V) are set using external resistor dividers per Figure 10. Driving SENSE directly from logic is not recommended; it must be biased close to the device with a 1µF ceramic capacitor to ground.
What is the purpose of the dual REFH and REFL pins on the LTC2239CUH#TRPBF?
The LTC2239CUH#TRPBF provides two REFH pins (3, 4) and two REFL pins (5, 6) to reduce package inductance and improve high-frequency stability of the internal reference buffer. Each pair must be shorted externally and bypassed with 0.1µF + 2.2µF ceramic capacitors to GND, as shown in the functional diagram. This dual-pin design minimizes voltage spikes during internal switching transitions that could otherwise degrade SNR.
Can the LTC2239CUH#TRPBF operate with a 1.8V OVDD supply?
Yes, the LTC2239CUH#TRPBF supports OVDD from 0.5V to 3.6V, including 1.8V. At OVDD = 1.8V, the outputs deliver VOH ≥ 1.79V and VOL ≤ 0.09V into 1.6mA loads, compatible with 1.8V FPGA or ASIC I/O standards. IOVDD current remains below 5mA at 80Msps, enabling low-voltage digital interfacing without level translators while maintaining timing margins.
LTC2239CUH#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):
- 80M
- 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:
- -
LTC2239CUH#TRPBF FAQ
1.How can I place an order for LTC2239CUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2239CUH#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 LTC2239CUH#TRPBF reliable?
The price and inventory of LTC2239CUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2239CUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2239CUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2239CUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2239CUH#TRPBF?
LTC2239CUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2239CUH#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 LTC2239CUH#TRPBF?
For technical support, including LTC2239CUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2239CUH#TRPBF requirements.
6.How does Aetrix verify that LTC2239CUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2239CUH#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 LTC2239CUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2239CUH#TRPBF?
All LTC2239CUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2239CUH#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 LTC2239CUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC2239CUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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