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Analog Devices Inc. LTC1741CFW#TRPBF
- Part No.:
- LTC1741CFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1741CFW#TRPBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,033
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Product details
Overview
LTC1741CFW#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 65 Msps pipelined analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in communications infrastructure. It delivers 72 dB SNR and 85 dB SFDR at 3.2 V input range, operates on a single 5 V supply, and features ±1 V or ±1.6 V differential input range selection via the SENSE pin. It is deployed in cellular base station receivers and spectrum analyzers requiring undersampling of IF signals up to 70 MHz.
For engineers reviewing the LTC1741CFW#TRPBF datasheet, LTC1741CFW#TRPBF pinout, LTC1741CFW#TRPBF application, or LTC1741CFW#TRPBF equivalent, key selection criteria include aperture jitter (0.15 psRMS), full-power bandwidth (240 MHz), differential encode interface compatibility (PECL/GTL/TTL), and flow-through TSSOP-48 layout support for high-density RF board design.
Technical Context
The LTC1741CFW#TRPBF implements a four-stage CMOS pipelined ADC architecture with digital error correction logic, achieving 5-cycle data latency and no missing codes across temperature. Its sample-and-hold uses direct capacitor sampling with 4 pF input capacitance in hold mode and supports differential analog inputs referenced to a 2.35 V common-mode voltage (VCM).
Timing is governed by a differential ENC/ENC pair with 15.3 ns minimum period, enabling precise 65 Msps operation; CLKOUT provides synchronized data valid strobe, while MSBINV selects offset binary or 2's complement output format. The digital outputs are powered by a separate OVDD rail (0.5 V to 5 V), allowing direct interfacing with low-voltage DSPs or FIFOs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes over full temperature range - ensures monotonicity in closed-loop control and measurement systems. |
| Sample Rate | 65 Msps - supports Nyquist sampling of signals up to 32.5 MHz or undersampling of IF bands up to 70 MHz. |
| SNR / SFDR | 72 dB / 85 dB at 5 MHz, 3.2 V range - enables high-fidelity digitization of narrowband communication carriers with low noise floor. |
| Aperture Jitter | 0.15 psRMS - limits sampling-time uncertainty, critical for maintaining SNR when undersampling high-frequency IF signals. |
| Input Bandwidth | 240 MHz full-power - preserves amplitude accuracy for wideband RF inputs without external anti-alias filtering degradation. |
| Supply & Power | Single 5 V analog supply (4.75–5.25 V), 1.275 W typical dissipation - simplifies power delivery in dense RF front-end modules. |
| Digital Interface | OVDD programmable 0.5–5 V, TTL/CMOS/PECL-compatible ENC/ENC, OE-controlled 3-state outputs - enables flexible interfacing with diverse logic families and processors. |
Pinout & Package
Package: 48-lead plastic TSSOP (FW), flow-through pinout optimized for controlled-impedance analog/digital partitioning and minimal trace crosstalk in high-speed PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accept ±1 V or ±1.6 V differential signal; require 2.35 V common-mode bias (VCM) for optimal linearity and harmonic suppression. |
| SENSE (Pin 1) | Input range select | GND = ±1 V range; VDD = ±1.6 V range; intermediate voltages enable custom ranges - sets internal reference scaling directly. |
| VCM (Pin 2) | Common-mode reference output | 2.35 V buffered output; must be bypassed with ≥4.7 µF ceramic capacitor to ground - stabilizes internal bandgap and enables transformer/op-amp driver biasing. |
| ENC, ENC (Pins 23–24) | Differential encode clock input | Edge-triggered conversion start; accepts PECL/GTL/TTL/sinusoidal drive - enables ultra-low-jitter sampling with external low-phase-noise sources. |
| CLKOUT (Pin 26) | Data valid strobe output | Rising edge aligns with stable D0–D11 and OF outputs - eliminates setup/hold timing uncertainty for synchronous capture in FPGA/DSP interfaces. |
| OE (Pin 25) | Output enable | Active-low control of D0–D11 and OF tri-state drivers - allows shared bus operation and reduces dynamic power during idle cycles. |
| OVDD (Pins 32, 43) | Digital output supply | Independent 0.5–5 V rail - permits direct connection to 1.8 V, 2.5 V, or 3.3 V logic without level shifters, reducing BOM count and signal integrity risk. |
| OF (Pin 48) | Over/underflow flag | Active-high indication of input exceeding selected full-scale range - enables real-time gain control or clipping detection in AGC loops. |
Key Features
| Feature | Design Value |
|---|---|
| Pipelined 4-stage architecture with digital correction | Enables 65 Msps throughput with 5-cycle deterministic latency and guaranteed monotonicity - essential for real-time digital downconversion pipelines. |
| Differential ENC/ENC with <0.15 psRMS jitter | Preserves SNR during IF undersampling up to 70 MHz - avoids performance loss from clock-induced noise folding. |
| Programmable ±1 V / ±1.6 V input range via SENSE pin | Allows optimization of dynamic range vs. SFDR trade-off per application: larger range for low-frequency oversampling, smaller range for high-frequency harmonic suppression. |
| Separate OVDD supply (0.5–5 V) | Eliminates need for external level translators when interfacing with modern low-voltage processors or memory - reduces layout complexity and EMI. |
| Flow-through TSSOP-48 pinout | Groups analog inputs (Pins 4–5), references (Pins 10–11, 14–15), and digital outputs (Pins 30–46) into isolated sections - minimizes coupling and simplifies impedance-controlled routing. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front-End |
|---|---|
Use Scenario: Digitizing 70 MHz IF signals from multi-carrier GSM/UMTS/LTE radio paths with simultaneous channel monitoring. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth; ENC/ENC driven by low-jitter synthesizer; CLKOUT synchronizes FPGA-based DDC blocks. Use Value: 72 dB SNR and 85 dB SFDR preserve adjacent-channel power ratio (ACPR) measurements; 240 MHz input bandwidth avoids external filtering distortion. | Use Scenario: Real-time frequency-domain analysis of broadband RF emissions from 10 MHz to 1 GHz using swept or FFT-based architectures. IC Role / Device Role / Timing Role: Core digitizer in heterodyne receiver chain; SENSE set to ±1.6 V for maximum dynamic range on low-frequency sweeps; VCM drives op-amp input stage. Use Value: No missing codes and ±0.4 LSB INL ensure accurate amplitude calibration across full code range; 0.15 psRMS jitter maintains resolution at high sweep speeds. |
| Imaging System Data Acquisition | Communications Test Equipment |
Use Scenario: Capturing time-domain waveforms from ultrasound transducer arrays or radar pulse echoes requiring >60 dB spurious-free fidelity. IC Role / Device Role / Timing Role: Precision digitizer in pulsed echo receiver; differential AIN+/AIN– driven by low-noise op-amp; OE used for burst-mode acquisition control. Use Value: 70.5 dB SNR at 30 MHz input supports high-resolution time-of-flight calculation; 2.35 V VCM simplifies DC-coupled analog front-end design. | Use Scenario: Signal generation and analysis in vector signal analyzers (VSA) and arbitrary waveform generators (AWG) validating 5G NR modulation accuracy. IC Role / Device Role / Timing Role: Reference-grade ADC in calibration loopback path; MSBINV configured for offset binary to match DAC output format; OVDD = 1.8 V for direct FPGA I/O compatibility. Use Value: 87 dB SFDR at 5 MHz enables EVM measurement below –45 dB; ±0.8 LSB DNL ensures linearity-critical IQ imbalance correction. |
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 | 12-bit, 65 Msps, but uses single-ended encode and lacks SENSE-selectable range; SNR = 71 dB (typ), SFDR = 84 dB (typ) at 5 MHz. | Less suitable for undersampling >40 MHz due to higher aperture jitter (0.25 psRMS) and no differential ENC support. | Select when cost sensitivity outweighs jitter-critical IF sampling needs and board space allows additional level-shifting circuitry. |
| LTC2248IUP#PBF | 14-bit, 65 Msps, differential ENC, 0.12 psRMS jitter, but requires dual 3.3 V/1.8 V supplies and has 64-lead QFN package. | Better resolution and jitter for metrology-grade applications, but higher power (1.45 W) and no 5 V single-supply option. | Select when 14-bit ENOB and sub-0.13 ps jitter justify added power, layout complexity, and supply sequencing requirements. |
Compared with AD9226ASTZ and LTC2248IUP#PBF, the LTC1741CFW#TRPBF uniquely balances 5 V single-supply simplicity, flow-through TSSOP layout efficiency, and 0.15 psRMS jitter-making it optimal for cost-constrained, space-limited RF receiver designs where 12-bit fidelity suffices.
Availability
LTC1741CFW#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, test equipment, and spectrum analysis systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production ramp.
Supply support for LTC1741CFW#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 communications, industrial, automotive, and healthcare markets.
The LTC1741CFW#TRPBF belongs to ADI's legacy Linear Technology high-speed data converter product line, designed specifically for demanding wireless infrastructure and instrumentation applications requiring low jitter, wide bandwidth, and robust DC accuracy.
FAQ
What is the operating temperature range for the LTC1741CFW#TRPBF?
The LTC1741CFW#TRPBF is specified for commercial operation from 0°C to 70°C (C-grade). This is confirmed in the Absolute Maximum Ratings table and applies to all AC and DC specifications unless otherwise noted. The 'C' suffix in the part number explicitly denotes this temperature grade, distinguishing it from the industrial-grade LTC1741IFW (–40°C to +85°C).
Does the LTC1741CFW#TRPBF support single-ended analog input?
No, the LTC1741CFW#TRPBF requires differential analog input on AIN+ and AIN– pins to achieve specified performance. The datasheet states that differential drive is necessary to maximize input range, improve common-mode noise immunity, and suppress even-order harmonics. Single-ended input degrades SNR, SFDR, and INL beyond guaranteed limits and is not supported by the internal architecture.
How is the input range selected on the LTC1741CFW#TRPBF?
The LTC1741CFW#TRPBF input range is selected via the SENSE pin (Pin 1): grounding SENSE configures ±1 V differential range; connecting SENSE to VDD configures ±1.6 V differential range. Intermediate voltages program proportional ranges (e.g., 1.3 V → ±1.3 V), and external resistors can extend this to custom values - all verified in the Converter Characteristics table and Functional Description.
Can the LTC1741CFW#TRPBF interface directly with a 1.8 V FPGA I/O bank?
Yes, the LTC1741CFW#TRPBF supports direct 1.8 V FPGA interfacing via its independent OVDD supply pins (Pins 32, 43). When OVDD is set to 1.8 V, the D0–D11 and OF outputs meet 1.8 V logic thresholds (VOH ≥ 1.71 V, VOL ≤ 0.1 V at IO = ±200 µA), eliminating level shifters. This capability is explicitly characterized in the Digital Inputs and Outputs section.
What is the purpose of the VCM pin on the LTC1741CFW#TRPBF?
The VCM pin (Pin 2) provides a buffered 2.35 V common-mode reference output required to bias the differential analog input stage. It must be bypassed with ≥4.7 µF ceramic capacitor to ground per the Layout Guidelines. VCM serves both as DC bias for transformer-coupled inputs and as reference for op-amp differential drivers - its stability directly impacts INL and harmonic distortion.
LTC1741CFW#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):
- 65M
- 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:
- -
LTC1741CFW#TRPBF FAQ
1.How can I place an order for LTC1741CFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1741CFW#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 LTC1741CFW#TRPBF reliable?
The price and inventory of LTC1741CFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1741CFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1741CFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1741CFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1741CFW#TRPBF?
LTC1741CFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1741CFW#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 LTC1741CFW#TRPBF?
For technical support, including LTC1741CFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1741CFW#TRPBF requirements.
6.How does Aetrix verify that LTC1741CFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1741CFW#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 LTC1741CFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1741CFW#TRPBF?
All LTC1741CFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1741CFW#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 LTC1741CFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1741CFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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