My Inquiry
My Account
Analog Devices Inc. LTC1853IFW#PBF
- Part No.:
- LTC1853IFW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1853IFW#PBF.pdf
- Description:
- IC ADC 12BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,898
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1853IFW#PBF 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 output interface. It supports single-ended/differential inputs, unipolar/bipolar operation, dual gain ranges (1×/2×), and programmable sequencer mode. Used in industrial process control systems requiring high channel density and low power at –40°C to +85°C.
For engineers reviewing the LTC1853IFW#PBF datasheet, LTC1853IFW#PBF pinout, LTC1853IFW#PBF application, or LTC1853IFW#PBF equivalent, key selection considerations include its 12-bit resolution with ±0.35 LSB INL, 400ksps sampling rate at 5V, 3mW power at 250ksps/3V, flexible 8-channel MUX configuration, and separate OVDD supply for 3V logic interfacing.
Technical Context
The LTC1853IFW#PBF implements a capacitive successive-approximation architecture with internal sample-and-hold, supporting acquisition times as low as 150ns and conversion time of 2.0μs at 5.5V. Its programmable sequencer stores up to 16 channel configurations-including DIFF, UNI/BIP, PGA, and address-with readback capability via dedicated S0–S6 status outputs.
Reference flexibility includes internal 2.5V buffer (REFOUT/REFCOMP), external 4.096V/2.5V/2.048V support via REFIN, and pin-strappable full-scale spans. Digital interface uses parallel 16-bit output (D11–D0 + A2OUT–A0OUT + DIFFOUT) with independent OVDD supply, enabling direct connection to 3V microcontrollers while analog section operates from 2.7–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function for precision measurement applications. |
| Sampling Rate | 400ksps maximum at VDD = 5.5V - enables real-time capture of signals up to 200kHz Nyquist bandwidth. |
| Integral Linearity | ±0.35 LSB over temperature - ensures <0.01% full-scale error across –40°C to +85°C operating range. |
| Power Consumption | 3mW at 250ksps/3V - allows battery-powered data loggers to achieve >1-year runtime on coin-cell batteries. |
| Analog Input Range | ±REFCOMP/2 (bipolar) or 0–REFCOMP (unipolar) - configurable full-scale span from 2.048V to 4.096V via REFIN pin. |
| Digital Interface Supply | OVDD = 2.7–5.5V independent of VDD - permits seamless interfacing with 3V FPGA I/O banks without level shifters. |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor control, and outdoor sensor nodes. |
Pinout & Package
48-lead plastic TSSOP (6.1mm wide), RoHS-compliant, lead-free finish. Pin 1 marked by notch or dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (1–8) | Analog Input Channels | Support single-ended (vs COM) or differential pairs (CH0/CH1, etc.); COM disabled when DIFF = high. |
| REFCOMP (12) | Reference Buffer Output | Provides 4.096V (with 2.5V REFIN) or 2.048V (REFIN = GND); sets full-scale input span for ADC core. |
| D11–D0 (21,22,23,24–32) | Parallel Data Outputs | 12-bit conversion result + 4-bit MUX address; three-state, driven from OVDD/OGND rails. |
| CONVST (45) | Conversion Start | Falling-edge triggered; initiates SAR cycle and resets internal register - timing-critical for jitter-sensitive apps. |
| SHDN/CS (47/46) | Power Management Control | SHDN low + CS low = Nap mode (0.5mA); SHDN low + CS high = Sleep mode (20μA) - enables rapid wake-up. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sequencer | Stores 16 channel configurations (address, DIFF, UNI/BIP, PGA); eliminates host software overhead for repetitive scans. |
| Flexible Reference Architecture | Internal 2.5V REFOUT feeds REFCOMP; REFIN accepts 0–2.6V to generate 0–4.096V REFCOMP - enables custom full-scale spans. |
| Independent Digital Supply (OVDD) | Separate OVDD rail (2.7–5.5V) powers D11–D0, A2OUT–A0OUT, DIFFOUT - removes need for external level translators with 3V logic. |
| Low-Power Scan Mode | Automatically cycles through all 8 channels at 400ksps with <10mW total consumption - ideal for continuous monitoring systems. |
| High-Accuracy Timing | 2psRMS aperture jitter and 150ns acquisition time - preserves SNR >72dB at 40kHz input frequency. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous acquisition from 8 thermocouple, RTD, and pressure sensor channels in PLC backplane modules. IC Role / Device Role / Timing Role: Central 12-bit ADC with built-in MUX and sequencer - replaces discrete MUX + ADC + controller combo. Use Value: Reduces BOM count by 3 components per channel and cuts firmware development time by eliminating manual channel sequencing logic. |
Use Scenario: Portable oscilloscope front-end capturing multi-channel analog waveforms at 400ksps with trigger synchronization. IC Role / Device Role / Timing Role: High-speed sampling ADC with low aperture jitter - provides accurate time-domain reconstruction up to 200kHz. Use Value: Maintains 72.5dB SNR at 40kHz input, enabling >11-bit effective resolution for waveform fidelity verification. |
| Telecom Base Station Diagnostics | Spectrum Analysis Front-End |
Use Scenario: Real-time monitoring of PA bias voltage, temperature, and current in LTE small-cell RF units. IC Role / Device Role / Timing Role: Precision ADC with bipolar input support - measures both positive and negative DC offsets in feedback loops. Use Value: ±0.35 LSB INL ensures <0.01% gain drift over temperature, critical for closed-loop PA calibration accuracy. |
Use Scenario: Digitizing IF signals in handheld spectrum analyzers with undersampling capability beyond Nyquist. IC Role / Device Role / Timing Role: Wideband SAR ADC with full-linear bandwidth optimized for >200kHz input frequencies. Use Value: S/(N+D) remains >72dB up to 200kHz, allowing clean alias-free analysis of harmonics and intermodulation products. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit SAR, 500ksps, SPI interface, integrated PGA - higher resolution but serial-only output and no internal reference buffer. | Requires external reference and level-shifting for 3V logic; better suited for high-precision, low-channel-count systems. | Select when ENOB >13 bits is required and system can accommodate SPI protocol overhead and external reference design. |
| MAX11623ETL+ | 12-bit, 250ksps, 8-channel, SPI interface, internal 2.048V ref - lower speed, smaller 24-pin TQFN package, no sequencer memory. | Limited to basic round-robin scanning; lacks programmable sequence storage and readback capability. | Select for space-constrained designs where sequencer functionality is unnecessary and SPI interface is preferred. |
Compared with ADS8688IPWR and MAX11623ETL+, the LTC1853IFW#PBF uniquely combines 12-bit accuracy, 400ksps parallel throughput, on-chip sequencer with 16-entry memory, and pin-strappable reference - making it optimal for deterministic, low-latency, multi-channel industrial DAQ where parallel bus timing and autonomous scan control are essential.
Availability
LTC1853IFW#PBF is available at Aetrix Electronics and suitable for industrial process control, test and measurement equipment, and telecom diagnostics requiring stable component supply across extended temperature ranges.
Supply support for LTC1853IFW#PBF 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#PBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for compact, low-power, multichannel industrial DAQ systems requiring integrated MUX, reference, and deterministic parallel interface.
FAQ
What is the maximum sampling rate of the LTC1853IFW#PBF and under what conditions?
The LTC1853IFW#PBF achieves a maximum sampling rate of 400ksps when VDD is 5.5V and the analog input signal meets acquisition time requirements (≥150ns). At 2.7V supply, the maximum rate drops to 250ksps due to reduced internal clock speed and settling margins. This specification is guaranteed over the full –40°C to +85°C operating range.
Does the LTC1853IFW#PBF require an external reference, or does it have an internal one?
The LTC1853IFW#PBF includes an internal 2.5V reference buffer (REFOUT/REFCOMP) and supports multiple reference configurations: internal 2.5V, pin-strapped 4.096V (via REFIN = 2.5V), or 2.048V (REFIN = GND). External references can also be applied directly to REFCOMP when REFIN is tied to VDD - giving full flexibility without requiring external reference ICs.
How does the programmable sequencer in the LTC1853IFW#PBF reduce firmware complexity?
The LTC1853IFW#PBF's sequencer stores up to 16 complete channel configurations (address, DIFF, UNI/BIP, PGA) in on-chip memory. Once programmed, it autonomously cycles through them in scan mode - eliminating the need for host CPU intervention between conversions. This reduces interrupt load and simplifies real-time DAQ firmware for fixed-pattern acquisitions.
Can the LTC1853IFW#PBF interface directly with a 3V microcontroller without level shifters?
Yes - the LTC1853IFW#PBF uses a separate OVDD supply (2.7–5.5V) for all digital outputs (D11–D0, A2OUT–A0OUT, DIFFOUT). When OVDD is set to 3.0V, outputs swing cleanly between 0V and 3.0V, matching standard 3V logic thresholds. No external level translation is needed for compatible 3V MCU or FPGA I/O banks.
What are the power-down modes supported by the LTC1853IFW#PBF and their typical current draw?
The LTC1853IFW#PBF supports two hardware-controlled power-down modes: Nap mode (SHDN = low, CS = low) draws 0.5mA, and Sleep mode (SHDN = low, CS = high) draws only 20μA. Both retain register contents and allow wake-up in <200ns (Nap) or <10ms (Sleep) - ideal for battery-powered sensors needing periodic wake-up bursts.
LTC1853IFW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC1853IFW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1853IFW#PBF 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#PBF reliable?
The price and inventory of LTC1853IFW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1853IFW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1853IFW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1853IFW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1853IFW#PBF?
LTC1853IFW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1853IFW#PBF 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#PBF?
For technical support, including LTC1853IFW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1853IFW#PBF requirements.
6.How does Aetrix verify that LTC1853IFW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1853IFW#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC1853IFW#PBF?
All LTC1853IFW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1853IFW#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC1853IFW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1853IFW#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
