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Analog Devices Inc. LTC1850CFW#TRPBF
- Part No.:
- LTC1850CFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1850CFW#TRPBF.pdf
- Description:
- IC ADC 10BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,418
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Product details
Overview
LTC1850CFW#TRPBF from Analog Devices (formerly Linear Technology) is a 10-bit, 8-channel, 1.25Msps parallel-output successive-approximation ADC with integrated 2.5V reference, programmable sequencer, and flexible multiplexer supporting single-ended/differential inputs, unipolar/bipolar operation, and dual gain ranges. It operates from a single 5V supply with 40mW typical power dissipation and targets high-speed data acquisition in test equipment and industrial control systems.
For engineers reviewing the LTC1850CFW#TRPBF datasheet, LTC1850CFW#TRPBF pinout, LTC1850CFW#TRPBF application, or LTC1850CFW#TRPBF equivalent, key selection criteria include its 10-bit resolution at 1.25Msps, on-chip reference buffer enabling 4.096V/2.5V/2.048V full-scale spans, 48-pin TSSOP package with OVDD-supplied 3V-compatible digital outputs, and scan-mode sequencing for automated multi-channel sampling.
Technical Context
The LTC1850CFW#TRPBF implements a capacitive successive-approximation architecture with internal sample-and-hold, achieving 61.7dB SNR and –80dB THD at 47kHz input under unipolar PGA=1 conditions. Its programmable sequencer stores up to 16 channel-address/configurations and supports readback via dedicated S0–S6 status bits.
It features true differential input pairs (CH0/CH1, CH2/CH3, etc.) with 60dB CMRR, configurable gain (1×/2×) and polarity (unipolar/bipolar), and three power states: active (40mW), Nap mode (1mA), and Sleep mode (50µA). Digital interface uses separate OVDD (2.7–5.25V) for logic-level compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes; ensures monotonic transfer function for precision measurement. |
| Sampling Rate | 1.25Msps maximum; enables real-time capture of signals up to 625kHz Nyquist bandwidth. |
| Integral Linearity | ±0.25 LSB max over temperature; guarantees <0.025% full-scale error in calibration-critical applications. |
| Reference Output | Internal 2.5V REFOUT with ±15ppm/°C tempco; provides stable excitation for external sensors or DACs. |
| Power Dissipation | 40mW typical at 1.25Msps from 5V; allows thermal design without heatsinking in compact PCB layouts. |
| Digital Supply Range | OVDD = 2.7V to 5.25V; permits direct interfacing to 3V microcontrollers or FPGAs without level shifters. |
| Input Voltage Range | 0V to VDD for analog inputs; supports rail-to-rail sensing when paired with appropriate front-end conditioning. |
Pinout & Package
Package: 48-lead plastic TSSOP (FW package), 7.0mm × 12.5mm body, 0.5mm pitch, RoHS-compliant, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Support single-ended vs. differential pairing (e.g., CH0/CH1); COM pin defines common-mode reference. |
| REFCOMP (Pin 12) | Reference Buffer Output | Sets full-scale span (e.g., 4.096V); bypassed with 10µF tantalum + 0.1µF ceramic for stability. |
| D11–D0 (Pins 21–30) | Parallel Data Outputs | 10-bit conversion result + 4-bit MUX address; driven from OVDD/OGND for 3V logic compatibility. |
| CONVST (Pin 45) | Conversion Start | Falling-edge triggered; initiates SAR cycle with 650ns conversion time and 150ns acquisition window. |
| M0/M1 (Pins 36/48) | Mode Select Inputs | Define operating mode: Direct Address, Program, Readback, or Scan; enable sequencer configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-step sequencer | Automates repeated multi-channel sampling without host CPU intervention; sequence memory is readable. |
| Flexible input configuration | Per-channel selection of single-ended/differential, unipolar/bipolar, and gain=1/gain=2 via control pins. |
| Integrated reference system | 2.5V REFOUT + REFIN/REFCOMP buffer allows 4.096V, 2.5V, or 2.048V full-scale spans with <15ppm/°C drift. |
| Low-power shutdown modes | Nap mode (1mA) and Sleep mode (50µA) reduce system standby power while preserving configuration state. |
| High channel isolation | ≥82dB worst-pair isolation at 100kHz in bipolar PGA=0 mode; minimizes crosstalk in dense sensor arrays. |
Applications
| Test & Measurement Equipment | Industrial Process Control |
|---|---|
Use Scenario: High-speed voltage/current monitoring in automated test fixtures with 8-sensor DUT interfaces. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized analog waveforms across 8 channels at 1.25Msps for real-time pass/fail analysis. Use Value: Eliminates need for external multiplexer and reference IC, reducing BOM count and layout area by >30%. | Use Scenario: Distributed I/O module acquiring temperature, pressure, and flow sensor signals in PLC backplanes. IC Role / Device Role / Timing Role: Centralized analog front-end converting 8 industrial sensor outputs into parallel digital words for FPGA processing. Use Value: Built-in 2.5V reference and 4.096V scaling enable direct connection to 4–20mA transmitters without external op-amps. |
| Imaging Systems | Telecommunications Baseband |
Use Scenario: CCD/CMOS line-scan sensor digitization in machine vision cameras requiring low-noise, multi-channel sampling. IC Role / Device Role / Timing Role: Simultaneous sampling of multiple photodiode outputs with matched gain/offset for pixel calibration. Use Value: ±0.25 LSB INL and 61.7dB SNR ensure <0.025% measurement uncertainty in grayscale fidelity. | Use Scenario: Digitizing analog IF signals from RF demodulators in wireless infrastructure base stations. IC Role / Device Role / Timing Role: Baseband ADC capturing 47kHz band-limited signals with –80dB THD for clean constellation mapping. Use Value: 82dB SFDR at 47kHz enables accurate EVM calculation for QPSK/16-QAM modulation schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data acquisition applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7928BRUZ | 8-channel, 12-bit, 1Msps SAR ADC; SPI interface; no internal reference; requires external 2.5V ref. | Lower sampling rate (1Msps vs. 1.25Msps); serial interface increases host overhead; no sequencer. | Select when board space is constrained and SPI is preferred over parallel; verify external reference stability meets ±15ppm/°C requirement. |
| LTC1851CFW#TRPBF | Pin-compatible 12-bit variant; identical package, timing, and feature set; higher resolution but same 1.25Msps rate. | Same footprint and control logic; delivers ±0.35 LSB INL and 72dB SNR for enhanced dynamic range. | Choose for applications demanding >10-bit precision without redesigning layout or firmware interface. |
Compared with AD7928BRUZ, LTC1850CFW#TRPBF offers higher speed and integrated reference but requires more PCB area for parallel bus routing; versus LTC1851CFW#TRPBF, it trades 2-bit resolution for lower cost and reduced post-processing complexity in 10-bit sufficient systems.
Availability
LTC1850CFW#TRPBF is available at Aetrix Electronics and suitable for test & measurement equipment, industrial process control systems, and imaging subsystems requiring stable component supply with guaranteed long-term availability.
Supply support for LTC1850CFW#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 industrial, automotive, communications, and healthcare markets.
The LTC1850CFW#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for high-speed, multi-channel industrial and instrumentation applications where integration, accuracy, and low power are critical.
FAQ
What is the maximum sampling rate supported by the LTC1850CFW#TRPBF?
The LTC1850CFW#TRPBF supports a maximum sampling rate of 1.25Msps, with a total conversion time of 650ns and acquisition time of 150ns. This enables real-time digitization of signals up to 625kHz (Nyquist frequency) while maintaining ±0.25 LSB integral linearity across the full operating temperature range (0°C to 70°C).
Does the LTC1850CFW#TRPBF include an internal voltage reference?
Yes, the LTC1850CFW#TRPBF integrates a 2.5V reference with REFOUT and REFCOMP pins. The reference buffer supports selectable full-scale spans of 4.096V, 2.5V, or 2.048V depending on REFIN configuration. REFOUT exhibits ±15ppm/°C temperature coefficient and 0.01 LSB/V line regulation, eliminating the need for external reference components in most designs.
How does the programmable sequencer in the LTC1850CFW#TRPBF operate?
The LTC1850CFW#TRPBF's sequencer stores up to 16 channel-address and configuration combinations (e.g., CH3, differential, bipolar, gain=2). In Scan mode, it automatically cycles through these entries without host intervention. The current sequencer location's status bits (S0–S6) appear on dedicated output pins (D7/S0, A0OUT/S3, etc.), and the entire sequence memory can be read back for verification or debugging.
Can the LTC1850CFW#TRPBF interface directly with 3V logic systems?
Yes, the LTC1850CFW#TRPBF supports direct 3V logic interfacing via its separate OVDD supply pin (Pin 35), which accepts 2.7V to 5.25V. All digital outputs (D11–D0, A2OUT/S5, etc.) swing between OVDD and OGND, allowing seamless connection to 3V microcontrollers or FPGAs without level-shifting circuitry.
What power-saving modes are available on the LTC1850CFW#TRPBF?
The LTC1850CFW#TRPBF offers two low-power modes: Nap mode (1mA supply current) activated by SHDN=0V and CS=0V, and Sleep mode (50µA supply current) activated by SHDN=0V and CS=5V. Both preserve sequencer configuration and reference settings, enabling fast wake-up (<200ns for Nap, 10ms for Sleep) without reinitialization overhead.
LTC1850CFW#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:
- 10
- Sampling Rate (Per Second):
- 1.25M
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1850CFW#TRPBF FAQ
1.How can I place an order for LTC1850CFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1850CFW#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 LTC1850CFW#TRPBF reliable?
The price and inventory of LTC1850CFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1850CFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1850CFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1850CFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1850CFW#TRPBF?
LTC1850CFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1850CFW#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 LTC1850CFW#TRPBF?
For technical support, including LTC1850CFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1850CFW#TRPBF requirements.
6.How does Aetrix verify that LTC1850CFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1850CFW#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 LTC1850CFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1850CFW#TRPBF?
All LTC1850CFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1850CFW#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 LTC1850CFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1850CFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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