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Analog Devices Inc. LTC1853IFW#TRPBF
- Part No.:
- LTC1853IFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1853IFW#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,171
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Product details
Overview
LTC1853IFW#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 400ksps, 8-channel successive approximation ADC with integrated multiplexer, internal 2.5V reference, and parallel digital interface. It supports single-ended/differential inputs, unipolar/bipolar operation, dual gain ranges (1×/2×), and programmable scan sequencing - used in industrial data acquisition systems requiring high channel density and low power at extended temperature.
For engineers reviewing the LTC1853IFW#TRPBF datasheet, LTC1853IFW#TRPBF pinout, LTC1853IFW#TRPBF application, or LTC1853IFW#TRPBF equivalent, key selection criteria include its 12-bit resolution with ±0.35 LSB integral nonlinearity, 400ksps sampling rate at 5V, 3mW power at 250ksps/3V, and flexible 48-pin TSSOP package supporting both analog and 3V/5V digital supply domains.
Technical Context
The LTC1853IFW#TRPBF implements a capacitive SAR architecture with internal sample-and-hold, enabling precise conversion of up to eight analog inputs per cycle. Its programmable sequencer stores up to 16 channel configurations - including DIFF, UNI/BIP, PGA, and address - and supports readback mode for runtime verification.
It features dual-domain power supplies: VDD (2.7–5.5V) for analog circuitry and OVDD (2.7–5.5V) for digital outputs, allowing direct interfacing with 3V logic while maintaining full 12-bit accuracy. Reference operation is configurable via REFIN to select internal 2.5V (→ 4.096V on REFCOMP), 2.048V, or external reference sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function across full operating range. |
| Sampling Rate | 400ksps at VDD = 5.5V - enables real-time capture of signals up to 200kHz Nyquist bandwidth. |
| Integral Nonlinearity | ±0.35 LSB max over –40°C to +85°C - ensures <0.1% full-scale error in precision measurement applications. |
| Power Consumption | 3mW at 250ksps/3V - supports battery-powered or thermally constrained embedded DAQ designs. |
| Analog Input Range | ±REFCOMP/2 (bipolar) or 0–REFCOMP (unipolar) - scalable full-scale span via REFCOMP voltage (2.048V/2.5V/4.096V). |
| Digital Interface | 16-bit parallel output (12-bit data + 4-bit MUX address) with separate OVDD supply - simplifies timing-critical FPGA/microcontroller interfacing. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, test equipment, and harsh-environment monitoring. |
Pinout & Package
48-lead plastic TSSOP (6.1mm wide), RoHS-compliant, lead-free finish. Pin 1 marked by dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (1–8) | Analog Input Channels | Configurable as 8 single-ended or 4 differential pairs; COM pin defines reference for single-ended mode. |
| REFOUT (10), REFIN (11), REFCOMP (12) | Reference Subsystem | REFOUT provides 2.5V reference; REFIN selects reference mode; REFCOMP delivers scaled output (e.g., 4.096V) for full-scale calibration. |
| D11–D0 (21,22,23,24–32) | Data Outputs | 12-bit conversion result + 4-bit MUX address; three-state, driven from OVDD/OGND - enables clean bus sharing. |
| CONVST (45), RD (44), WR (43), CS (46) | Digital Control Inputs | Asynchronous parallel interface: CONVST starts conversion; RD latches data; WR programs sequencer; CS enables device. |
| M0/M1 (36,48), PGA (37), UNI/BIP (38), DIFF (42) | Configuration Inputs | Set operating mode, gain (1×/2×), polarity (unipolar/bipolar), and input type (single-ended/differential) before or during sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-step sequencer | Eliminates host software overhead for multi-channel scanning - stores address, gain, polarity, and differential settings per step. |
| Internal 2.5V reference with buffer | Provides stable 4.096V full-scale reference on REFCOMP; ±15ppm/°C tempco ensures accuracy across industrial temperature range. |
| Nap/Sleep shutdown modes | Reduces supply current to 0.5mA (Nap) or 20μA (Sleep) - extends battery life in portable instrumentation without losing configuration state. |
| Dual-supply digital I/O (OVDD) | Allows direct connection to 3V microcontrollers or FPGAs while analog section runs at 5V - avoids level-shifter components and timing skew. |
| Scan mode with automatic cycling | Hardware-accelerated round-robin acquisition across all 8 channels - ideal for continuous monitoring without CPU intervention. |
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: Central 12-bit ADC acquiring synchronized samples from multiple sensor front-ends using programmable sequencer and bipolar input support. Use Value: ±0.35 LSB INL and 72.5dB SNR ensure sub-0.1% measurement fidelity across –40°C to +85°C ambient. | Use Scenario: Embedded digitizer in handheld multimeter or oscilloscope capturing transient waveforms with variable gain and polarity. IC Role / Device Role / Timing Role: High-speed parallel-output ADC providing 400ksps sampling with hardware scan mode to reduce firmware complexity. Use Value: 3mW power at 250ksps/3V enables >10-hour battery life; dual OVDD/VDD supplies simplify mixed-voltage board design. |
| Imaging Systems | Spectrum Analysis |
Use Scenario: CCD/CMOS line-scan sensor readout in industrial vision inspection systems requiring precise gain-matched channel response. IC Role / Device Role / Timing Role: Multi-channel analog front-end ADC converting pixel voltages with identical PGA and offset calibration per channel. Use Value: ±0.5 LSB offset error match and ±0.5 LSB gain error match ensure uniform pixel response across all 8 inputs. | Use Scenario: Real-time RF spectrum analyzer frontend digitizing IF signals up to 200kHz with undersampling capability. IC Role / Device Role / Timing Role: Wideband SAR ADC delivering 72.5dB S/(N+D) and –85dB SFDR for accurate spectral component detection. Use Value: Low 2psRMS aperture jitter preserves phase coherence in FFT-based frequency analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit resolution, 500ksps, SPI interface, integrated PGA - higher resolution but serial interface increases controller overhead. | Requires microcontroller with SPI master and timing-critical firmware for multi-channel sequencing. | Choose when absolute precision >12-bit and system already uses SPI peripherals; avoid if parallel bus simplicity or low-latency readout is critical. |
| MAX11624EEE+ | 12-bit, 250ksps, 8-channel, internal reference, SPI interface - lower speed, smaller 16-pin QSOP package. | Limited to 250ksps and lacks programmable sequencer memory; requires host to manage channel order. | Choose for space-constrained, cost-sensitive designs where 400ksps and autonomous scan mode are not required. |
Compared with ADS8688IPWR and MAX11624EEE+, the LTC1853IFW#TRPBF uniquely combines 400ksps parallel-output performance, hardware-based 16-step sequencer, and dual-supply flexibility - reducing firmware burden and PCB routing complexity in industrial DAQ systems.
Availability
LTC1853IFW#TRPBF is available at Aetrix Electronics and suitable for industrial process control, test & measurement equipment, and imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1853IFW#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 LTC1853IFW#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, multi-channel industrial DAQ systems demanding high accuracy, configurability, and robustness across –40°C to +85°C.
FAQ
What is the maximum sampling rate of the LTC1853IFW#TRPBF and under what conditions?
The LTC1853IFW#TRPBF achieves a maximum sampling rate of 400ksps when VDD is 5.5V. At reduced supply voltages - such as 2.7V - the maximum rate drops to 250ksps. This dependency is specified in the Timing Characteristics table and reflects internal clock scaling for reliable SAR conversion across the full 2.7V–5.5V analog supply range.
Does the LTC1853IFW#TRPBF require an external reference, or does it have an internal one?
The LTC1853IFW#TRPBF includes an internal 2.5V reference with buffer amplifier, producing a precise 4.096V output on REFCOMP when REFIN is set to 2.5V. It also supports external reference operation: tying REFIN to VDD disables the buffer, allowing direct drive of REFCOMP. This dual-mode flexibility makes the LTC1853IFW#TRPBF usable in both self-contained and system-referenced designs.
How many analog input channels does the LTC1853IFW#TRPBF support, and how are they configured?
The LTC1853IFW#TRPBF supports eight analog input channels (CH0–CH7), configurable either as eight single-ended inputs referenced to COM or as four differential pairs (CH0/CH1, CH2/CH3, etc.). Configuration is controlled by the DIFF pin and A2/A1/A0 address lines, with additional settings for unipolar/bipolar range and PGA gain selected via UNI/BIP and PGA pins - all programmable per channel in sequencer mode.
What power-saving modes does the LTC1853IFW#TRPBF offer, and how do they differ?
The LTC1853IFW#TRPBF offers two low-power states: Nap mode (SHDN = low, CS = low) draws 0.5mA, retaining sequencer configuration and enabling fast wake-up (<200ns); Sleep mode (SHDN = low, CS = high) draws only 20μA but requires longer wake-up time (~10ms). Both modes preserve register contents, allowing rapid resumption of acquisition without reinitialization - critical for duty-cycled industrial sensors.
Is the LTC1853IFW#TRPBF pin-compatible with other members of the LTC185x family?
Yes - the LTC1853IFW#TRPBF shares the same 48-pin TSSOP footprint and pinout with the LTC1852 (10-bit), LTC1851 (12-bit, 1.25Msps), and LTC1850 (10-bit, 1.25Msps). This allows direct upgrade paths: for example, replacing LTC1852IFW#TRPBF with LTC1853IFW#TRPBF increases resolution from 10-bit to 12-bit without PCB redesign, provided timing and power constraints are verified.
LTC1853IFW#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):
- 400k
- 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:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- PGA, Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1853IFW#TRPBF FAQ
1.How can I place an order for LTC1853IFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1853IFW#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 LTC1853IFW#TRPBF reliable?
The price and inventory of LTC1853IFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1853IFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1853IFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1853IFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1853IFW#TRPBF?
LTC1853IFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1853IFW#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 LTC1853IFW#TRPBF?
For technical support, including LTC1853IFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1853IFW#TRPBF requirements.
6.How does Aetrix verify that LTC1853IFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1853IFW#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 LTC1853IFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1853IFW#TRPBF?
All LTC1853IFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1853IFW#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 LTC1853IFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1853IFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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