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Analog Devices Inc. LTC1743IFW#TRPBF
- Part No.:
- LTC1743IFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1743IFW#TRPBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
LTC1743IFW#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 infrastructure. It delivers 72.5 dB SNR and 85 dB SFDR at ±1.6 V input range, operates from a single 5 V supply, dissipates 1000 mW, and features selectable ±1 V or ±1.6 V differential input ranges with 150 MHz full-power bandwidth - enabling direct IF sampling in cellular base station receivers.
For engineers reviewing the LTC1743IFW#TRPBF datasheet, LTC1743IFW#TRPBF pinout, LTC1743IFW#TRPBF application, or LTC1743IFW#TRPBF equivalent, key selection criteria include its 0.3 psRMS aperture jitter, ±1 LSB INL over temperature, flow-through 48-pin TSSOP layout, resistor-programmable input range, and compatibility with 0.5–5 V digital output supplies for interfacing to low-voltage DSPs or FIFOs.
Technical Context
The LTC1743IFW#TRPBF employs a four-stage CMOS pipelined ADC architecture with interstage residue amplification and digital correction logic, delivering 12-bit resolution without missing codes. Its differential S/H front-end supports 150 MHz full-power bandwidth and exhibits 80 dB common-mode rejection, while ultralow 0.3 psRMS jitter enables undersampling of IF signals up to 70 MHz with minimal noise degradation.
Operation is controlled by differential ENC/ENC inputs that define sample/hold timing phases; conversion latency is five clock cycles. The device integrates an internal 2.5 V bandgap reference, programmable input range selection via SENSE pin (ground = ±1 V, VDD = ±1.6 V), and separate OVDD supply (0.5–5 V) for independent digital output voltage scaling - supporting seamless interface to 2 V, 3 V, or 5 V logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonic transfer function for precision measurement and spectral analysis. |
| Sampling Rate | 50 Msps maximum - supports Nyquist-limited bandwidth up to 25 MHz or undersampling of higher IF frequencies. |
| SNR / SFDR (±1.6V) | 72.5 dB SNR and 85 dB SFDR at 5 MHz input - enables high-fidelity digitization of narrowband RF signals in receiver chains. |
| Aperture Jitter | 0.3 psRMS - limits sampling-time uncertainty, critical for maintaining SNR when undersampling >10 MHz IF signals. |
| Input Bandwidth | 150 MHz full-power - allows direct digitization of wideband signals without external anti-alias filtering below 150 MHz. |
| INL / DNL | ±1 LSB INL and ±0.8 LSB DNL over –40°C to +85°C - ensures accurate amplitude representation across industrial temperature range. |
| Power Supply | Single 5 V analog supply (VDD); independent 0.5–5 V digital output supply (OVDD) - decouples noise-sensitive analog core from digital I/O domains. |
Pinout & Package
Package: 48-lead plastic TSSOP (FW package), flow-through pinout optimized for high-speed PCB layout with minimized trace length and crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±1 V or ±1.6 V differential signal; requires 2.5 V common-mode bias (VCM) for optimal linearity and harmonic suppression. |
| SENSE | Input range select | Ground = ±1 V range; VDD = ±1.6 V range; intermediate voltage sets proportional range - enables dynamic optimization for varying signal amplitudes. |
| VCM | Common-mode reference output | 2.5 V ±30 ppm/°C output; bypassed with 4.7 µF capacitor - provides precise DC bias for transformer-coupled or op-amp-driven differential inputs. |
| ENC, ENC | Differential encode clock input | Conversion triggered on ENC rising edge; supports PECL/GTL/TTL/CMOS or sinusoidal drive - eliminates need for external clock conditioning circuitry. |
| D0–D11 | 12-bit parallel digital output | LSB-to-MSB outputs; OE-controlled tri-state; OVDD-supplied - interfaces directly to 0.5–5 V logic families including low-voltage DSPs and memory buffers. |
| CLKOUT | Data valid strobe | Rising-edge-aligned with data output - simplifies synchronous capture in FPGA or ASIC logic without additional timing margining. |
| OF | Over/underflow flag | Active-high indicates input exceeded selected full-scale range - enables real-time gain control or clipping detection in closed-loop systems. |
Key Features
| Feature | Design Value |
|---|---|
| Pipelined 12-bit architecture | Delivers 50 Msps throughput with deterministic 5-cycle latency - enables predictable timing alignment in real-time signal processing pipelines. |
| Selectably scalable input range | ±1 V or ±1.6 V differential via SENSE pin - maximizes ADC utilization across varying signal chain gains without external attenuators or amplifiers. |
| Ultralow aperture jitter (0.3 psRMS) | Preserves SNR during IF undersampling up to 70 MHz - reduces requirement for ultra-low-phase-noise local oscillators in direct-conversion receivers. |
| Separate OVDD supply (0.5–5 V) | Eliminates level-shifting components when interfacing to sub-1.8 V DSPs or FPGAs - lowers BOM count and improves power integrity. |
| Flow-through 48-pin TSSOP layout | Groups analog inputs, digital outputs, and power pins to minimize coupling - simplifies routing of high-speed traces and reduces layout iteration time. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front-End |
|---|---|
|
Use Scenario: Digitizing 70–250 MHz IF signals from downconverters in LTE/FDD/TDD macrocell base stations. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth for digital predistortion and channel estimation. Use Value: 72.5 dB SNR and 85 dB SFDR at 50 Msps enable clean capture of adjacent-channel interference and modulation quality verification per 3GPP standards. |
Use Scenario: Sampling intermediate frequency outputs in benchtop and portable spectrum analyzers requiring >100 MHz real-time bandwidth. IC Role / Device Role / Timing Role: Core digitizer providing high-fidelity time-domain data for FFT-based frequency-domain analysis. Use Value: 150 MHz full-power bandwidth and ±1 LSB INL ensure accurate amplitude and phase response across multi-octave sweeps without calibration drift. |
| Imaging System Data Acquisition | Communications Test Equipment |
|
Use Scenario: Capturing pulsed ultrasound or radar return signals in medical or industrial imaging platforms. IC Role / Device Role / Timing Role: Time-of-flight digitizer synchronizing to high-repetition-rate transmit pulses with sub-nanosecond timing fidelity. Use Value: 0.3 psRMS aperture jitter minimizes time-domain smearing, preserving pulse edge definition critical for mm-level spatial resolution. |
Use Scenario: Signal acquisition in vector signal analyzers and protocol testers validating 5G NR, Wi-Fi 6E, and Bluetooth LE waveforms. IC Role / Device Role / Timing Role: Reference-grade ADC verifying EVM, ACLR, and spectral mask compliance under modulated stimulus. Use Value: 90 dB SFDR at 2 V range enables detection of low-level spurs and harmonics buried beneath high-power carriers - essential for conformance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9235BCPZ-50 | 12-bit, 50 Msps, 70 dB SNR (at 5 MHz), 82 dB SFDR; requires external reference and separate analog/digital supplies. | Lower AC performance and more complex power sequencing; lacks integrated VCM buffer and SENSE-based range selection. | Choose AD9235BCPZ-50 only if legacy design reuse or dual-supply architecture already exists; LTC1743IFW#TRPBF offers superior jitter and simpler biasing. |
| LTC2245IUP#PBF | 14-bit, 65 Msps, 73.5 dB SNR (at 5 MHz), 90 dB SFDR; 64-pin QFN, higher power (1300 mW), no SENSE pin - fixed ±1.25 V input range. | Higher resolution and speed but less flexible input scaling; requires tighter layout control due to QFN thermal pad and higher pin density. | Choose LTC2245IUP#PBF when 14-bit resolution is mandatory and system can accommodate fixed input range and increased power; LTC1743IFW#TRPBF better suits cost- and layout-sensitive 12-bit IF sampling. |
Compared with AD9235BCPZ-50 and LTC2245IUP#PBF, the LTC1743IFW#TRPBF uniquely balances 12-bit precision, 50 Msps throughput, and analog flexibility - offering integrated VCM, programmable input range, and ultralow jitter in a flow-through TSSOP package ideal for rapid prototyping and production scalability.
Availability
LTC1743IFW#TRPBF is available at Aetrix Electronics and suitable for cellular base station receivers, spectrum analyzer front-ends, imaging system data acquisition, and communications test equipment requiring stable component supply across extended industrial temperature ranges (–40°C to +85°C).
Supply support for LTC1743IFW#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 semiconductors, serving aerospace, industrial, automotive, and communications markets.
The LTC1743IFW#TRPBF belongs to Linear's high-speed pipeline ADC product line, designed specifically for demanding communications infrastructure applications where low jitter, wide input bandwidth, and flexible signal scaling are essential for IF sampling and spectral analysis.
FAQ
What is the operating temperature range for the LTC1743IFW#TRPBF?
The LTC1743IFW#TRPBF is specified for industrial operation from –40°C to +85°C (I-grade). This is confirmed in the Absolute Maximum Ratings table and Converter Characteristics section of the official datasheet, where all "G"-marked specifications apply across this full range - including ±1 LSB INL, ±0.8 LSB DNL, and 72.5 dB SNR at ±1.6 V range.
Does the LTC1743IFW#TRPBF require an external reference voltage?
No, the LTC1743IFW#TRPBF integrates an internal 2.5 V bandgap reference and difference amplifier to generate its own differential reference levels (REFHA/REFHB/REFLA/REFLB). External reference is not required - though the SENSE pin selects between ±1 V and ±1.6 V input ranges using internal reference scaling, not external voltage injection.
Can the LTC1743IFW#TRPBF interface directly with a 1.8 V FPGA?
Yes - the LTC1743IFW#TRPBF supports OVDD from 0.5 V to 5 V. Setting OVDD = 1.8 V configures D0–D11, CLKOUT, OF, and OE outputs to 1.8 V logic levels, with VOH ≥ 1.7 V and VOL ≤ 0.1 V under load, enabling direct connection to 1.8 V FPGA I/O banks without level shifters.
How does the SENSE pin configure the input range on the LTC1743IFW#TRPBF?
The SENSE pin on the LTC1743IFW#TRPBF selects full-scale input range: grounding SENSE sets ±1 V differential range; connecting SENSE to VDD sets ±1.6 V differential range. Voltages between 1 V and 1.6 V scale the range linearly (e.g., 1.3 V → ±1.3 V), allowing fine-grained optimization for signal chain gain distribution.
What is the significance of the "IFW" suffix in LTC1743IFW#TRPBF?
The "IFW" suffix denotes the industrial-grade temperature range (–40°C to +85°C) and 48-lead TSSOP package (FW). The "#TRPBF" indicates tape-and-reel packaging (TR), lead-free (Pb-free), and RoHS-compliant (F) construction - fully consistent with Analog Devices' standardized ordering nomenclature for this product family.
LTC1743IFW#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1743IFW#TRPBF FAQ
1.How can I place an order for LTC1743IFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1743IFW#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 LTC1743IFW#TRPBF reliable?
The price and inventory of LTC1743IFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1743IFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1743IFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1743IFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1743IFW#TRPBF?
LTC1743IFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1743IFW#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 LTC1743IFW#TRPBF?
For technical support, including LTC1743IFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1743IFW#TRPBF requirements.
6.How does Aetrix verify that LTC1743IFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1743IFW#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 LTC1743IFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1743IFW#TRPBF?
All LTC1743IFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1743IFW#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 LTC1743IFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1743IFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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