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Analog Devices Inc. LTC1850IFW#TRPBF
- Part No.:
- LTC1850IFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1850IFW#TRPBF.pdf
- Description:
- IC ADC 10BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
LTC1850IFW#TRPBF from Analog Devices (formerly Linear Technology) is a 10-bit, 8-channel, 1.25Msps successive-approximation ADC with integrated 8-channel multiplexer, internal 2.5V reference, reference buffer, and parallel 14-bit output (10-bit data + 4-bit MUX address). It supports single-ended/differential inputs, dual gain ranges (1×/2×), unipolar/bipolar operation, and programmable scan sequencing - used in industrial process control data acquisition systems requiring high channel density and low-latency sampling.
For engineers reviewing the LTC1850IFW#TRPBF datasheet, LTC1850IFW#TRPBF pinout, LTC1850IFW#TRPBF application, or LTC1850IFW#TRPBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature grade, 48-pin TSSOP package, 1.25Msps sustained sampling rate, 40mW typical power at 5V, and support for 3V digital interface via separate OVDD supply.
Technical Context
The LTC1850IFW#TRPBF implements a capacitive SAR architecture with integrated sample-and-hold, enabling 1.25Msps conversion with 650ns typical conversion time and 150ns acquisition time. Its programmable sequencer stores up to 16 channel-address-and-configuration entries, supporting repeat scanning and readback of sequence memory.
It features true differential input pairs (CH0–CH1, CH2–CH3, etc.), 60dB CMRR over DC–1MHz, and configurable analog input range via REFCOMP (e.g., ±2.048V bipolar at gain=2). The internal reference buffer provides 4.096V output when driven by 2.5V on REFIN, with ±15ppm/°C tempco and 0.01 LSB/V line regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, no missing codes - guarantees monotonic transfer function for precision measurement. |
| Sampling Rate | 1.25Msps maximum - enables real-time capture of signals up to 625kHz Nyquist bandwidth. |
| INL Error | ±0.25 LSB max (–40°C to +85°C) - ensures <0.025% full-scale accuracy across temperature. |
| Power Dissipation | 40mW typical at 1.25Msps, 5V - supports thermally constrained industrial PCB layouts. |
| Supply Voltages | VDD = 4.75–5.25V; OVDD = 2.7–5.25V - allows direct interfacing to 3V logic without level shifters. |
| Reference Output | REFOUT = 2.48–2.52V (2.5V nominal); REFCOMP = 4.06–4.132V (internal ref) - stable, buffered reference for consistent full-scale span. |
| Channel Count | 8 analog inputs with flexible configuration - reduces external multiplexer count and board space in multi-sensor systems. |
Pinout & Package
Package: 48-lead plastic TSSOP (FW package), 7.0mm × 12.5mm body, 0.5mm pitch, exposed pad not electrically connected. RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Configurable as single-ended vs. differential pairs (e.g., CH0/CH1); COM pin defines common-mode reference. |
| COM (Pin 9) | Analog Input Common | Reference node for single-ended mode; disabled in differential mode (DIFF = 1). |
| REFOUT (Pin 10) | 2.5V Reference Output | Stable internal reference; requires 1µF bypass to AGND for noise immunity. |
| REFCOMP (Pin 12) | Reference Buffer Output | Sets full-scale input span (e.g., 4.096V); drives external circuitry or sets gain via PGA pin. |
| D9/S2 to D0 (Pins 21–30) | Data Outputs | 10-bit conversion result + 4-bit MUX address; three-state, driven from OVDD/OGND rails. |
| BUSY (Pin 33) | Conversion Status Flag | Active-low open-drain signal; rising edge indicates data ready for latching. |
| OVDD (Pin 35) | Digital Output Supply | Independent rail (2.7–5.25V) - enables direct connection to 3V microcontrollers or FPGAs. |
| CONVST (Pin 45) | Conversion Start | Falling-edge triggered; initiates acquisition and conversion cycle without CPU overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sequencer | Stores 16 channel-address-and-configuration entries (gain, polarity, differential/single-ended) for autonomous multi-channel scanning. |
| Flexible Input Configuration | Per-channel selection of unipolar/bipolar, gain=1/gain=2, and single-ended/differential via control pins (UNI/BIP, PGA, DIFF). |
| Internal Reference System | Integrated 2.5V reference + buffer with 4.096V REFCOMP output; eliminates need for external precision reference ICs. |
| Low-Power Shutdown Modes | Nap mode draws 1mA; Sleep mode draws 50µA - extends uptime in battery-powered DAQ or portable test equipment. |
| High Channel Isolation | ≥90dB worst-pair isolation at 100kHz (bipolar, PGA=1) - prevents crosstalk in simultaneous multi-sensor monitoring. |
Applications
| Industrial Process Control | Test & Measurement Equipment |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors across 8 PLC I/O modules in a factory automation system. IC Role / Device Role / Timing Role: 10-bit ADC with programmable sequencer performs synchronized sampling of all 8 channels at 100ksps per channel in scan mode. Use Value: Eliminates external multiplexer and timing controller; reduces BOM cost and layout area while maintaining <±0.25 LSB INL across –40°C to +85°C. | Use Scenario: Portable oscilloscope front-end capturing transient waveforms from multiple probes simultaneously. IC Role / Device Role / Timing Role: High-speed 1.25Msps ADC digitizes analog inputs with 650ns conversion time and BUSY-synchronized readout. Use Value: Enables real-time waveform reconstruction up to 625kHz with SNR = 61.7dB (unipolar, PGA=1), meeting Class II handheld instrument requirements. |
| Imaging Systems | Telecommunications Signal Analysis |
Use Scenario: CCD/CMOS sensor readout in industrial machine vision cameras with multi-tap analog outputs. IC Role / Device Role / Timing Role: 8-channel ADC acquires pixel data from parallel sensor taps using differential inputs to reject common-mode noise. Use Value: 60dB CMRR and true differential architecture suppress EMI from motor drives or switching power supplies near imaging hardware. | Use Scenario: Baseband signal monitoring in cellular infrastructure test benches analyzing LTE/5G RF front-end performance. IC Role / Device Role / Timing Role: Digitizes IF or baseband analog signals with SFDR = 80dB (unipolar, PGA=1) for spectral purity validation. Use Value: Supports spurious-free dynamic range >74dB up to Nyquist, enabling accurate detection of low-level intermodulation products in RF compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multi-channel, parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8320UB | 16-bit, 100ksps, SPI interface, no internal reference - higher resolution but lower speed and serial interface only. | Used in low-speed precision instrumentation where resolution >10 bits is critical and microcontroller SPI is available. | Select ADS8320UB when absolute precision outweighs speed and parallel bus simplicity. |
| MAX11607ETI+ | 12-bit, 250ksps, I²C interface, internal reference, 8-channel - slower, serial interface, smaller TQFN package. | Targeted at space-constrained embedded systems with I²C buses and moderate throughput needs (e.g., smart sensors). | Choose MAX11607ETI+ for compact designs with I²C host and relaxed sampling rate requirements. |
Compared with ADS8320UB and MAX11607ETI+, the LTC1850IFW#TRPBF delivers 12.5× faster sampling (1.25Msps vs. 100ksps/250ksps), native parallel output for zero-software-overhead data capture, and integrated reference - making it optimal for real-time industrial DAQ where latency, determinism, and integration matter most.
Availability
LTC1850IFW#TRPBF is available at Aetrix Electronics and suitable for industrial process control, test & measurement equipment, imaging systems, and telecommunications signal analysis requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for LTC1850IFW#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1850IFW#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for high-channel-count, high-speed industrial DAQ systems demanding robustness, accuracy, and minimal external component count.
FAQ
What is the operating temperature range of the LTC1850IFW#TRPBF?
The LTC1850IFW#TRPBF is rated for industrial operation from –40°C to +85°C ambient temperature. This range is validated across all key specifications including INL (±0.25 LSB), power consumption (40mW typ), and timing parameters (tCONV = 650ns max). The device uses the "I" grade suffix to denote this extended temperature capability, distinguishing it from the commercial-grade "C" version (0°C to 70°C).
Does the LTC1850IFW#TRPBF require an external reference voltage?
No, the LTC1850IFW#TRPBF does not require an external reference voltage. It integrates a 2.5V bandgap reference and reference buffer amplifier. The REFOUT pin provides 2.5V (±20mV), and the REFCOMP pin delivers a buffered 4.096V output (when REFIN = 2.5V) - sufficient for full-scale analog input ranges. External references are optional only for specialized calibration or higher-accuracy applications.
How many analog input channels does the LTC1850IFW#TRPBF support, and how are they configured?
The LTC1850IFW#TRPBF supports 8 analog input channels (CH0–CH7). They can be configured as eight single-ended inputs referenced to COM, or as four true differential pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7). Configuration is controlled by the DIFF, UNI/BIP, and PGA pins, allowing per-channel selection of differential/single-ended mode, unipolar/bipolar range, and gain = 1 or 2.
What digital interface options does the LTC1850IFW#TRPBF provide?
The LTC1850IFW#TRPBF provides a 14-bit parallel output interface (10-bit data + 4-bit MUX address) with separate OVDD supply (2.7–5.25V) for direct compatibility with 3V or 5V logic. It uses standard control signals - CONVST (edge-triggered start), BUSY (data-ready flag), RD (data strobe), CS (chip select), and WR (sequencer programming) - eliminating need for SPI/I²C translation logic in microcontroller-based systems.
Can the LTC1850IFW#TRPBF operate in low-power modes, and what are their current draws?
Yes, the LTC1850IFW#TRPBF supports two low-power shutdown modes. In Nap mode (SHDN = 0V, CS = 0V), supply current drops to 1mA with fast wake-up (<200ns). In Sleep mode (SHDN = 0V, CS = 5V), current falls to 50µA with longer wake-up (10ms with 10µF REFCOMP bypass). Both modes reduce power dissipation to ≤5mW and ≤0.25mW respectively - ideal for battery-backed or energy-conscious DAQ subsystems.
LTC1850IFW#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1850IFW#TRPBF FAQ
1.How can I place an order for LTC1850IFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1850IFW#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 LTC1850IFW#TRPBF reliable?
The price and inventory of LTC1850IFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1850IFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1850IFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1850IFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1850IFW#TRPBF?
LTC1850IFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1850IFW#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 LTC1850IFW#TRPBF?
For technical support, including LTC1850IFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1850IFW#TRPBF requirements.
6.How does Aetrix verify that LTC1850IFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1850IFW#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 LTC1850IFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1850IFW#TRPBF?
All LTC1850IFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1850IFW#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 LTC1850IFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1850IFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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