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Analog Devices Inc. LTC1852IFW#TRPBF
- Part No.:
- LTC1852IFW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1852IFW#TRPBF.pdf
- Description:
- IC ADC 10BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,571
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Product details
Overview
LTC1852IFW#TRPBF from Analog Devices (formerly Linear Technology) is a 10-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, and programmable gain (1×/2×), enabling flexible data acquisition in industrial sensor systems, test equipment, and process monitoring.
For engineers reviewing the LTC1852IFW#TRPBF datasheet, LTC1852IFW#TRPBF pinout, LTC1852IFW#TRPBF application, or LTC1852IFW#TRPBF equivalent, this page provides verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for embedded analog front-end design.
Technical Context
The LTC1852IFW#TRPBF implements a capacitive SAR architecture with integrated sample-and-hold, supporting full-scale input ranges of ±REFCOMP/2 (bipolar, gain=1) or 0–REFCOMP (unipolar, gain=1), where REFCOMP is programmable to 2.048V, 2.5V, or 4.096V via REFIN control. Its 16-bit parallel output includes 10-bit conversion result plus 4-bit MUX address (A2OUT/S5, A1OUT/S4, A0OUT/S3, DIFFOUT/S6).
It features dual power domains: VDD (2.7–5.5V) powers analog circuitry and logic core, while OVDD (2.7–5.5V) independently supplies digital outputs-enabling direct interfacing with 3V or 5V logic. Power management includes Nap mode (0.5mA IDD) and Sleep mode (20μA IDD), both selected via SHDN and CS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes; guarantees monotonic transfer function across full temperature range. |
| Max Sampling Rate | 400ksps at VDD = 5.5V; enables real-time capture of signals up to 200kHz Nyquist bandwidth. |
| Integral Linearity Error | ±0.25 LSB (typ), ±1 LSB (max) over –40°C to +85°C; ensures accurate amplitude fidelity in precision measurement. |
| Analog Input Range | Configurable: 0–2.5V (unipolar, gain=1), ±1.25V (bipolar, gain=1), or scaled variants using external REFCOMP. |
| Power Consumption | 10mW at 400ksps/5V; 3mW at 250ksps/3V - optimized for low-power portable and battery-backed DAQ systems. |
| Reference Options | Internal 2.5V reference (REFOUT); external reference support via REFIN/REFCOMP with 1.6384× buffer gain. |
| Digital Interface | 16-bit parallel bus (D9–D0 + A2OUT/A1OUT/A0OUT/DIFFOUT); separate OVDD supply allows mixed-voltage system integration. |
Pinout & Package
Package: 48-lead plastic TSSOP (6.1mm wide), RoHS-compliant, lead-free finish. Thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (1–8) | Analog Input Channels | Support single-ended (vs. COM) or differential pairs (CH0/CH1, CH2/CH3, etc.); COM disabled when DIFF = high. |
| COM (9) | Analog Input Common | Reference node for single-ended operation; must be grounded when DIFF = high to avoid noise coupling. |
| REFOUT (10) | 2.5V Reference Output | Stable internal reference; requires 1μF bypass to AGND for low-noise operation. |
| REFIN (11) | Reference Mode Select | Logic 0 → 2.048V on REFCOMP; Logic 1 → disables buffer for external reference drive. |
| REFCOMP (12) | Reference Buffer Output | Sets full-scale span; output = 1.6384 × REFIN; bypass with 10μF tantalum || 0.1μF ceramic. |
| D9–D0 (21–30) | Parallel Data Outputs | 10-bit conversion result (D9–D0); three-state, driven by RD/CS; powered by OVDD. |
| A2OUT/S5–A0OUT/S3 (18–20) | MUX Address Outputs | 4-bit channel address (S5–S3) + DIFF bit (S6); concurrent with data during read cycle. |
| BUSY (33) | Conversion Status Flag | Active-low open-drain signal; falling edge starts conversion, rising edge indicates data ready. |
| OVDD (35) | Digital Output Supply | Independent 2.7–5.5V rail; decouples digital I/O noise from analog section; bypass required. |
| SHDN (47) | Power Shutdown Control | Active-low; CS state determines Nap (CS low) vs. Sleep (CS high) mode; reduces IDD to 0.5mA or 20μA. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sequencer | Stores up to 16 MUX configurations (channel, gain, polarity, differential mode); eliminates host software overhead for repetitive scans. |
| Flexible Input Configuration | Single-ended/differential, unipolar/bipolar, and PGA (1×/2×) selectable per channel via hardware pins - no register writes needed. |
| Scan Mode Automation | Hardware-controlled cyclic acquisition across all 8 channels; BUSY rising edge synchronizes data latch timing. |
| Low-Power Dual Shutdown | Nap mode (0.5mA) retains sequencer memory; Sleep mode (20μA) fully halts conversion - ideal for duty-cycled sensing. |
| Separate Analog/Digital Supplies | VDD powers analog core and logic; OVDD powers outputs - enables clean 3V digital interfacing without level shifters. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of PLC I/O modules with 8 sensor inputs (thermocouples, RTDs, 4–20mA transmitters). IC Role / Device Role / Timing Role: Central 10-bit ADC with integrated MUX and reference; performs synchronized multi-channel sampling at 100ksps per channel in scan mode. Use Value: Eliminates external MUX and reference ICs; reduces BOM count and layout area while maintaining ±0.25 LSB INL across –40°C to +85°C. |
Use Scenario: High-speed parametric testing of analog ICs requiring simultaneous capture of multiple device-under-test (DUT) outputs. IC Role / Device Role / Timing Role: Precision sampling front-end with programmable sequencer; acquires 16 unique test configurations without host intervention. Use Value: Reduces test cycle time by 40% versus software-controlled GPIO-based addressing; supports 400ksps burst reads via parallel bus. |
| Portable Data Loggers | Motor Drive Current Sensing |
|
Use Scenario: Battery-powered environmental logger capturing temperature, humidity, and pressure via 8 analog sensors over 24-hour cycles. IC Role / Device Role / Timing Role: Low-power ADC subsystem; operates in Sleep mode between samples, wakes on timer-triggered CONVST pulse. Use Value: Achieves 3mW typical power at 250ksps/3V - extends battery life to >6 months on two AA cells. |
Use Scenario: Real-time phase current sampling in 3-phase inverter drives, requiring precise bipolar measurement of shunt voltages. IC Role / Device Role / Timing Role: Bipolar-input ADC with ±1.25V full-scale range (gain=1); captures fast transient currents with <2.5μs acquisition+conversion time. Use Value: Enables accurate field-oriented control (FOC) with <0.5% gain error match across channels - critical for torque ripple reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7923BRUZ | 4-channel, 12-bit, SPI interface, no internal reference; requires external REF and level-shifting for 3V logic. | Lacks integrated MUX sequencing and parallel bus; better suited for space-constrained, lower-channel-count designs with microcontroller SPI support. | Choose AD7923BRUZ when board area is critical and host firmware can manage channel sequencing; avoid if parallel interface or internal reference is required. |
| LTC1850CFW#TRPBF | Pin-compatible 10-bit upgrade with 1.25Msps sampling rate; identical pinout and feature set but higher speed and power (15mW @ 1.25Msps). | Same industrial/ATE use cases but targets higher-bandwidth signals (>500kHz Nyquist); not rated for –40°C to +85°C extended temp range. | Choose LTC1850CFW#TRPBF only if sampling rate >400ksps is mandatory and operating temperature stays within 0°C to 70°C. |
Compared with AD7923BRUZ, LTC1852IFW#TRPBF delivers integrated MUX sequencing and parallel output - reducing firmware complexity and latency. Versus LTC1850CFW#TRPBF, it trades speed for extended temperature rating and lower power, making it optimal for ruggedized embedded DAQ.
Availability
LTC1852IFW#TRPBF is available at Aetrix Electronics and suitable for industrial process control, automated test equipment, and portable data loggers requiring stable component supply across extended temperature environments.
Supply support for LTC1852IFW#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 LTC1852IFW#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for low-power, multi-channel, embedded analog front-ends where integration, reliability, and temperature stability are critical.
FAQ
What is the operating temperature range for the LTC1852IFW#TRPBF?
The LTC1852IFW#TRPBF is specified for –40°C to +85°C ambient operation (Industrial grade). All key specifications-including integral linearity (±1 LSB), offset error (±4 LSB), and power consumption-are guaranteed across this full range, making it suitable for harsh-environment deployments like factory automation and outdoor instrumentation.
Does the LTC1852IFW#TRPBF require an external reference?
No, the LTC1852IFW#TRPBF includes an internal 2.5V reference (REFOUT) and reference buffer amplifier. It supports three reference modes: internal 2.5V (REFIN = VDD), internal 2.048V (REFIN = GND), or external reference (REFIN = VDD with REFCOMP driven externally). No external reference is required for basic operation.
How does the programmable sequencer work in the LTC1852IFW#TRPBF?
The LTC1852IFW#TRPBF's sequencer stores up to 16 MUX configurations (channel address, DIFF, UNI/BIP, PGA) in internal memory. Once programmed via WR pulses in Program mode, it autonomously cycles through entries in Scan mode - eliminating host CPU polling and enabling deterministic multi-channel acquisition without software overhead.
Can the LTC1852IFW#TRPBF interface directly with 3V microcontrollers?
Yes. The LTC1852IFW#TRPBF uses separate OVDD and OGND supplies for its parallel digital outputs (D9–D0, A2OUT–A0OUT, DIFFOUT). By tying OVDD to 3V, all outputs swing between 0V and 3V - enabling direct connection to 3V logic without level shifters or bus buffers.
What is the minimum acquisition time required before conversion in the LTC1852IFW#TRPBF?
The LTC1852IFW#TRPBF requires a minimum 150ns acquisition time (tACQ) after the CONVST falling edge to ensure proper sampling of the analog input. This is guaranteed across –40°C to +85°C and supports full 400ksps throughput when combined with the 2.0μs typical conversion time.
LTC1852IFW#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):
- 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:
- -
LTC1852IFW#TRPBF FAQ
1.How can I place an order for LTC1852IFW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1852IFW#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 LTC1852IFW#TRPBF reliable?
The price and inventory of LTC1852IFW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1852IFW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1852IFW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1852IFW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1852IFW#TRPBF?
LTC1852IFW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1852IFW#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 LTC1852IFW#TRPBF?
For technical support, including LTC1852IFW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1852IFW#TRPBF requirements.
6.How does Aetrix verify that LTC1852IFW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1852IFW#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 LTC1852IFW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1852IFW#TRPBF?
All LTC1852IFW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1852IFW#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 LTC1852IFW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1852IFW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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