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Analog Devices Inc. LTC1744IFW#PBF
- Part No.:
- LTC1744IFW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1744IFW#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,926
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Product details
Overview
LTC1744IFW#PBF from Analog Devices (acquired Linear Technology) is a 14-bit, 50Msps pipelined analog-to-digital converter with ±1V/±1.6V differential input range, 77dB SNR at 3.2V range, and 150MHz full-power bandwidth sample-and-hold. It operates from a single 5V supply, dissipates 1.2W, and targets high-dynamic-range signal digitization in IF receivers and spectrum analyzers.
For engineers reviewing the LTC1744IFW#PBF datasheet, LTC1744IFW#PBF pinout, LTC1744IFW#PBF application, or LTC1744IFW#PBF equivalent, key selection criteria include its 50Msps sampling rate, ±1V differential input compatibility, 0.3psRMS aperture jitter, no missing codes guarantee, and 48-pin TSSOP package with flow-through layout.
Technical Context
The LTC1744IFW#PBF implements a four-stage CMOS pipelined ADC architecture with integrated correction logic and digital output latches. Its differential ENC/ENC encode interface supports PECL, GTL, TTL, or sinusoidal drive, enabling low-jitter sampling of IF signals up to 70MHz.
It features a resistor-programmable input range selector (via SENSE pin), on-chip 2.5V VCM bias generator with ±30ppm/°C tempco, and separate OVDD output supply rail (0.5V–5V) for direct interfacing with low-voltage DSPs or FIFOs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over temperature - ensures monotonicity in precision measurement systems. |
| Sampling Rate | 50Msps maximum - supports Nyquist-limited digitization of signals up to 25MHz baseband or undersampling of IF bands. |
| SNR (3.2V Range) | 77dB at 5MHz input - enables high-fidelity capture of narrowband communications signals with >12 effective bits. |
| SFDR (3.2V Range) | 87dB at 5MHz input - suppresses spurious tones critical for spectral purity in base station receivers. |
| Aperture Jitter | 0.3psRMS - limits sampling-time uncertainty, preserving SNR when undersampling RF/IF frequencies. |
| INL / DNL | ±4LSB max INL, ±1.5LSB max DNL - maintains linearity for accurate amplitude reconstruction in imaging and test equipment. |
| Input Bandwidth | 150MHz full-power - allows direct digitization of wideband analog inputs without external amplification roll-off. |
Pinout & Package
48-lead plastic TSSOP (FW package) with flow-through pinout optimized for controlled-impedance PCB routing and minimal crosstalk between analog, digital, and power domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±1V or ±1.6V differential signal; requires 2.5V common-mode bias via VCM for optimal linearity. |
| SENSE | Input range selection | GND = ±1V range; VDD = ±1.6V range; intermediate voltage sets proportional range - enables system-level gain optimization. |
| VCM | Common-mode bias output | 2.5V reference with ±30ppm/°C tempco; must be bypassed with ≥4.7µF capacitor to maintain noise immunity. |
| ENC, ENC | Differential encode clock inputs | Edge-triggered sampling; accepts PECL/GTL/sinusoidal drive - eliminates need for external clock conditioning circuitry. |
| OE | Digital output enable | Active-low control; places D0–D13 and OF outputs in high-impedance state - supports shared data bus architectures. |
| D0–D13 | Parallel digital output bus | 14-bit offset binary or 2's complement (via MSBINV); OVDD rail configurable from 0.5V to 5V - interfaces directly with 1.8V/2.5V/3.3V/5V logic. |
| CLKOUT | Data valid strobe | Rising-edge synchronized latch signal - simplifies timing closure in FPGA/DSP-based acquisition systems. |
| OF | Over/underflow flag | Active-high indicator of input exceeding selected full-scale range - enables real-time AGC or saturation detection. |
Key Features
| Feature | Design Value |
|---|---|
| Pipelined 14-bit architecture with digital correction | Delivers 5-cycle latency and guaranteed no missing codes - enables deterministic timing in closed-loop control and real-time processing. |
| Selectable ±1V / ±1.6V differential input range | Optimizes dynamic range for varying signal amplitudes without external gain stages - reduces BOM count and board area. |
| 0.3psRMS aperture jitter | Preserves SNR during IF undersampling (e.g., 70MHz input at 50Msps) - critical for LTE/WiMAX receiver front-ends. |
| Separate OVDD output supply (0.5V–5V) | Eliminates level-shifters when interfacing with low-voltage processors - simplifies power domain partitioning and reduces EMI. |
| Flow-through 48-pin TSSOP layout | Groups analog inputs, references, and digital outputs on opposite edges - minimizes trace coupling and eases high-speed layout. |
Applications
| Wireless Base Station Receivers | Spectrum Analyzers |
|---|---|
Use Scenario: Digitizing 70MHz IF signals from downconverters in multi-carrier GSM/LTE base stations. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth with minimal spurious content. Use Value: 87dB SFDR at 5MHz and 70MHz input preserves adjacent-channel interference rejection required by 3GPP standards. |
Use Scenario: Real-time FFT-based frequency-domain analysis of RF signals up to 25MHz span. IC Role / Device Role / Timing Role: Precision digitizer feeding FPGA-based spectral processing pipeline. Use Value: 77dB SNR and ±4LSB INL ensure accurate amplitude calibration across frequency bins without post-processing correction. |
| Medical Imaging Systems | High-Speed Data Acquisition |
Use Scenario: Capturing ultrasound echo return signals with >12-bit effective resolution for beamforming. IC Role / Device Role / Timing Role: Low-latency ADC synchronizing with pulsed transmit/receive cycles. Use Value: 5-cycle fixed latency and CLKOUT strobe enable precise time-of-flight calculation in portable scanners. |
Use Scenario: Modular test equipment digitizing transient waveforms in automated test systems. IC Role / Device Role / Timing Role: Standalone ADC with OE-controlled bus sharing for multi-channel synchronization. Use Value: No missing codes and 150MHz input bandwidth support accurate capture of fast-rising edge pulses without waveform distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9245BSTZ-50 | 14-bit, 50Msps, but uses 3.3V supply and LVDS outputs; SNR = 72.5dB at 5MHz (2V range). | Requires external termination and level-shifting for CMOS interfacing; lower SNR limits dynamic range in weak-signal reception. | Choose when LVDS backplane interconnect or lower power (750mW) is prioritized over SNR and supply simplicity. |
| LTC2245IUP | 14-bit, 65Msps, 3.3V supply, 64-pin QFN; SNR = 74dB at 5MHz (2V range); includes internal dither. | Higher sample rate but reduced SNR and different package; lacks SENSE pin for input range selection. | Choose when >50Msps throughput is needed and ±1.6V range programmability is not required. |
Compared with AD9245BSTZ-50 and LTC2245IUP, the LTC1744IFW#PBF offers superior SNR (77dB vs ≤74dB), single 5V supply operation, and pin-selectable input range - making it optimal for cost-sensitive, high-fidelity IF digitization where power supply count and layout simplicity matter.
Availability
LTC1744IFW#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, test instrumentation, medical imaging, and high-speed data acquisition requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for LTC1744IFW#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 LTC1744IFW#PBF belongs to Linear Technology's high-speed precision ADC family, designed specifically for demanding communications and instrumentation applications requiring wide bandwidth, low jitter, and guaranteed monotonicity.
FAQ
What is the operating temperature range for the LTC1744IFW#PBF?
The LTC1744IFW#PBF is specified for industrial operation from –40°C to +85°C (I-grade). This is confirmed in the Absolute Maximum Ratings table, where LTC1744I denotes the industrial temperature variant. The device maintains full performance specifications-including SNR, SFDR, and INL-across this entire range without derating.
Does the LTC1744IFW#PBF require an external reference voltage?
No, the LTC1744IFW#PBF uses an internal reference architecture with dedicated REFHA/REFHB and REFLA/REFLB pins for external decoupling only. The 2.5V VCM pin provides common-mode bias, and the SENSE pin selects input range-no external reference IC or resistor network is needed for basic operation.
Can the LTC1744IFW#PBF interface directly with a 1.8V FPGA I/O bank?
Yes. The LTC1744IFW#PBF supports OVDD from 0.5V to 5V. Setting OVDD = 1.8V configures D0–D13 and OF outputs to 1.8V logic levels, with VOL ≤ 0.4V and VOH ≥ 1.62V under load-fully compliant with standard 1.8V LVTTL/LVCMOS interfaces without level shifters.
What is the data latency of the LTC1744IFW#PBF, and how is it synchronized?
The LTC1744IFW#PBF has a fixed 5-cycle latency from ENC edge to valid data on D0–D13. This is synchronized via the CLKOUT pin, which asserts a rising edge coincident with data validity-enabling reliable capture in FPGA registers without complex deskew logic.
How does the SENSE pin configure the input range on the LTC1744IFW#PBF?
The SENSE pin on the LTC1744IFW#PBF sets the full-scale differential input range: grounded = ±1V, tied to VDD = ±1.6V, or biased to an intermediate voltage (e.g., 1.3V) to select ±1.3V. This resistor-programmable feature allows dynamic range matching to signal chain gain without hardware changes.
LTC1744IFW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 50M
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1744IFW#PBF FAQ
1.How can I place an order for LTC1744IFW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1744IFW#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 LTC1744IFW#PBF reliable?
The price and inventory of LTC1744IFW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1744IFW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1744IFW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1744IFW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1744IFW#PBF?
LTC1744IFW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1744IFW#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 LTC1744IFW#PBF?
For technical support, including LTC1744IFW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1744IFW#PBF requirements.
6.How does Aetrix verify that LTC1744IFW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1744IFW#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 LTC1744IFW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1744IFW#PBF?
All LTC1744IFW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1744IFW#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 LTC1744IFW#PBF part is unused and in its original packaging.
Return procedure for LTC1744IFW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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