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Analog Devices Inc. LTC1743CFW#TRPBF
- Part No.:
- LTC1743CFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1743CFW#TRPBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,057
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Product details
Overview
LTC1743CFW#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 50 Msps pipelined analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in communications systems. It features ±1V or ±1.6V differential input ranges, 72.5 dB SNR at 3.2V range, 85 dB SFDR, and ultralow 0.3 psRMS aperture jitter - enabling high-fidelity undersampling of IF signals up to 70 MHz in cellular base station receivers.
For engineers reviewing the LTC1743CFW#TRPBF datasheet, LTC1743CFW#TRPBF pinout, LTC1743CFW#TRPBF application, or LTC1743CFW#TRPBF equivalent, this page delivers verified specifications, validated TSSOP-48 pin functions, real-world telecom and spectrum analysis use cases, and two confirmed alternative ADCs with documented functional trade-offs.
Technical Context
The LTC1743CFW#TRPBF implements a 4-stage CMOS pipelined architecture with internal residue amplification and digital correction logic, delivering 12-bit resolution with no missing codes across 0°C to 70°C. Its differential S/H front-end supports full-power bandwidth of 150 MHz and accepts encode inputs from PECL, GTL, TTL, or sinusoidal sources - with ENC/ENC differential pair enabling robust noise immunity.
It integrates a programmable 2.5 V common-mode bias (VCM), resistor-selectable reference scaling via SENSE pin, and separate OVDD supply (0.5 V to 5 V) for direct interfacing with low-voltage DSPs or FIFOs. DC accuracy includes ±0.4 LSB typical INL and ±0.2 LSB typical DNL over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonicity and deterministic code transitions in closed-loop control or spectral analysis. |
| Sampling Rate | 50 Msps maximum - supports Nyquist sampling of signals up to 25 MHz or undersampling of IF bands up to 70 MHz. |
| SNR / SFDR | 72.5 dB SNR & 85 dB SFDR (3.2 V range, 5 MHz input) - enables high-fidelity digitization of weak signals adjacent to strong interferers in receiver chains. |
| Aperture Jitter | 0.3 psRMS - limits sampling-time uncertainty-induced noise floor degradation, critical for >50 MHz IF sampling. |
| Input Range | Selectable ±1 V or ±1.6 V differential - matches common RF transformer or op-amp driver output swings without external gain adjustment. |
| Power Dissipation | 1000 mW typical at 50 Msps - requires thermal-aware PCB layout with exposed pad grounding and localized decoupling. |
| Supply Voltage | VDD = 4.75 V to 5.25 V; OVDD = 0.5 V to 5 V - allows independent optimization of analog core and digital output voltage domains. |
Pinout & Package
Package: 48-pin plastic TSSOP (FW package) with flow-through pinout for simplified PCB routing and minimized trace skew between differential pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±1 V or ±1.6 V differential signal; requires matched 100 Ω source impedance for optimal SFDR. |
| SENSE | Input range selection | GND = ±1 V range; VDD = ±1.6 V range; intermediate voltage sets proportional range - enables flexible front-end design. |
| VCM | 2.5 V common-mode bias output | Provides precise DC level for transformer center-tap biasing or op-amp VOCM reference - bypassed with ≥4.7 µF ceramic capacitor. |
| ENC, ENC | Differential encode clock input | Conversion triggered on ENC rising edge; accepts PECL/GTL/sinusoidal drive - eliminates need for external clock conditioning. |
| D0–D11 | 12-bit parallel digital output | Offset binary or 2's complement format selectable via MSBINV; outputs driven by OVDD-supplied buffers - supports direct connection to 1.8 V/2.5 V/3.3 V/5 V logic. |
| CLKOUT | Data valid strobe | Rising edge indicates stable D0–D11 and OF data - simplifies timing capture in FPGA or ASIC interfaces without additional synchronization logic. |
| OE | Output enable | Active-low control enables tri-state operation - allows shared bus architectures or multiplexed data paths. |
| OF | Over/underflow flag | High when input exceeds selected full-scale range - provides real-time saturation detection for AGC or clipping mitigation algorithms. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow aperture jitter (0.3 psRMS) | Enables clean undersampling of 70 MHz IF signals with minimal SNR penalty - critical for zero-IF and low-IF radio architectures. |
| Resistor-programmable input range | SENSE pin configuration eliminates external gain-setting resistors - reduces BOM count and layout sensitivity in production designs. |
| Dual-domain power supplies (VDD/OVDD) | Independent analog core and digital output rails allow seamless interfacing with mixed-voltage systems - e.g., 5 V analog domain + 1.8 V FPGA interface. |
| Flow-through TSSOP-48 pinout | Minimizes trace length mismatch between differential pairs (AIN+/AIN–, ENC/ENC, D0–D11) - preserves signal integrity and timing skew below 10 ps. |
| Integrated 2.5 V VCM reference | Eliminates need for external common-mode bias generator - simplifies transformer-coupled or op-amp-driven input stages while maintaining DC accuracy. |
Applications
| Cellular Base Station Receivers | Spectrum Analyzers |
|---|---|
|
Use Scenario: Digitizing 40–60 MHz IF signals from quadrature downconverters in LTE/FDD-TDD baseband processing. IC Role / Device Role / Timing Role: High-speed ADC capturing complex I/Q waveforms with <73 dB SNR at 50 Msps for real-time FFT-based channel estimation. Use Value: 0.3 psRMS jitter and 85 dB SFDR preserve EVM performance under multi-tone interference - meeting 3GPP TS 36.104 ACLR requirements. |
Use Scenario: Real-time frequency-domain acquisition in portable spectrum analyzers covering 9 kHz–3 GHz via harmonic mixing and IF sampling. IC Role / Device Role / Timing Role: Digitizing 20–40 MHz IF outputs from superheterodyne front-ends with 12-bit resolution and no missing codes for accurate amplitude calibration. Use Value: ±1 LSB INL and ±0.8 LSB DNL ensure flat frequency response across 8192-point FFT bins - reducing post-processing correction overhead. |
| Communications Test Equipment | Imaging Systems (Ultrasound Beamforming) |
|
Use Scenario: Capturing modulated RF bursts (e.g., 5G NR FR1) in vector signal analyzers requiring >70 dB SFDR at 25 MHz offset. IC Role / Device Role / Timing Role: Primary ADC in wideband digitizer modules, synchronized to external 50 MHz clock with CLKOUT-strobed parallel output. Use Value: Differential ENC/ENC interface rejects board-level noise during high-speed triggering - improving measurement repeatability in automated test systems. |
Use Scenario: Sampling echo return signals from phased-array transducers in portable ultrasound machines operating at 5–15 MHz center frequencies. IC Role / Device Role / Timing Role: Channel ADC in multi-channel receive beamformer ASICs, leveraging 150 MHz S/H bandwidth for wideband pulse-echo fidelity. Use Value: 71 dB SNR at 2 V range enables >140 dB dynamic range per channel - supporting deep tissue penetration and microstructure resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1744CFW#TRPBF | 14-bit resolution, same 50 Msps rate, identical TSSOP-48 package and pinout - but higher 1150 mW power dissipation and 75 dB SNR (3.2 V range). | Better resolution for low-noise baseband processing; less suitable for power-constrained portable spectrum analyzers. | Choose LTC1744CFW#TRPBF when 14-bit ENOB is required and thermal headroom exists; otherwise LTC1743CFW#TRPBF offers optimal 12-bit SNR/power trade-off. |
| AD9226ASTZ-50 | 12-bit, 65 Msps, 48-lead LQFP; 72 dB SNR at 5 MHz, 82 dB SFDR; requires external reference and separate analog/digital supplies. | Higher sample rate supports wider instantaneous bandwidth; lacks integrated VCM and SENSE-based range selection. | Choose AD9226ASTZ-50 when >50 Msps is mandatory and board space allows external reference circuitry; LTC1743CFW#TRPBF provides faster time-to-design with integrated biasing. |
Compared with LTC1744CFW#TRPBF and AD9226ASTZ-50, the LTC1743CFW#TRPBF uniquely balances 12-bit precision, 50 Msps throughput, integrated VCM/SENSE flexibility, and 1000 mW power - making it the preferred choice for cost-optimized, thermally constrained telecom receiver designs where 14-bit resolution is unnecessary.
Availability
LTC1743CFW#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, spectrum analysis instrumentation, and ultrasound imaging systems requiring stable component supply, long-term obsolescence management, and traceable lot-level documentation.
Supply support for LTC1743CFW#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 technologies, serving aerospace, industrial, automotive, and communications markets since 1965.
The LTC1743CFW#TRPBF belongs to ADI's legacy Linear Technology high-speed ADC product line, engineered specifically for demanding communications receiver applications requiring low jitter, wide input bandwidth, and flexible interface options.
FAQ
What is the operating temperature range for the LTC1743CFW#TRPBF?
The LTC1743CFW#TRPBF is specified for commercial-grade operation from 0°C to 70°C (C-grade). This is indicated by the "C" in the part number and confirmed in the Absolute Maximum Ratings table. For extended temperature operation (–40°C to 85°C), the LTC1743IFW variant is available - the LTC1743CFW#TRPBF itself is not rated beyond 70°C ambient.
Does the LTC1743CFW#TRPBF require an external reference voltage?
No, the LTC1743CFW#TRPBF integrates an internal 2.5 V bandgap reference and difference amplifier. It does not require an external reference - instead, it uses internal REFHA/REFHB/REFLA/REFLB pins with recommended 0.1 µF and 4.7 µF bypass capacitors. The SENSE pin selects between ±1 V and ±1.6 V input ranges using this internal reference.
Can the LTC1743CFW#TRPBF interface directly with a 1.8 V FPGA?
Yes, the LTC1743CFW#TRPBF supports direct interfacing with 1.8 V logic via its separate OVDD supply pin (Pins 32 and 43), which can be set from 0.5 V to 5 V. When OVDD = 1.8 V, the D0–D11 outputs, CLKOUT, OE, and OF signals meet 1.8 V logic thresholds - eliminating level-shifters in FPGA-connected digitizer designs.
What is the function of the MSBINV pin on the LTC1743CFW#TRPBF?
The MSBINV pin (Pin 22) controls output data format: logic low selects 2's complement format (useful for baseband I/Q processing), while logic high selects offset binary format (standard for most spectrum analysis firmware). This hardware-selectable option avoids software conversion overhead and ensures deterministic data alignment in real-time systems using the LTC1743CFW#TRPBF.
How is the analog input common-mode voltage established for the LTC1743CFW#TRPBF?
The LTC1743CFW#TRPBF establishes analog input common-mode voltage via its dedicated VCM pin (Pin 2), which outputs a precise 2.5 V ±30 ppm/°C reference. This voltage must be bypassed to ground with ≥4.7 µF ceramic capacitance and can drive the center tap of an RF transformer or the VOCM input of a differential op-amp driver - ensuring optimal ±0.5 V or ±0.8 V input swing around 2.5 V for the LTC1743CFW#TRPBF.
LTC1743CFW#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1743CFW#TRPBF FAQ
1.How can I place an order for LTC1743CFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1743CFW#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 LTC1743CFW#TRPBF reliable?
The price and inventory of LTC1743CFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1743CFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1743CFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1743CFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1743CFW#TRPBF?
LTC1743CFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1743CFW#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 LTC1743CFW#TRPBF?
For technical support, including LTC1743CFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1743CFW#TRPBF requirements.
6.How does Aetrix verify that LTC1743CFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1743CFW#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 LTC1743CFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1743CFW#TRPBF?
All LTC1743CFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1743CFW#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 LTC1743CFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1743CFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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