My Inquiry
My Account
Analog Devices Inc. LTC1854IG#TRPBF
- Part No.:
- LTC1854IG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1854IG#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1854IG#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 8-channel, ±10V input analog-to-digital converter with integrated multiplexer, internal 2.5V reference, and SPI/MICROWIRE-compatible serial interface. It operates from a single 5V supply, delivers 100ksps sampling rate, features ±30V fault protection on all analog inputs, and supports both single-ended and differential configurations. It is used in industrial process control systems requiring high-voltage bipolar signal digitization with channel isolation.
For engineers reviewing the LTC1854IG#TRPBF datasheet, LTC1854IG#TRPBF pinout, LTC1854IG#TRPBF application, or LTC1854IG#TRPBF equivalent, key selection criteria include its guaranteed ±1LSB INL over –40°C to +85°C, 40mW typical power dissipation at full speed, Nap/Sleep shutdown modes, ±30V overvoltage tolerance, and 28-pin SSOP package compatibility with multiplexed data acquisition architectures.
Technical Context
The LTC1854IG#TRPBF employs a successive-approximation register (SAR) architecture with an internal sample-and-hold circuit and factory-trimmed internal clock ensuring ≤5µs conversion time. Its 8-channel analog multiplexer precedes the ADC core and includes precision resistor networks for accurate ±10V input scaling, eliminating multiplexer on-resistance errors.
It integrates a temperature-compensated bandgap reference (2.50V ±10ppm/°C) and a 1.6384× buffered output (REFCOMP = 4.096V), supporting both internal and external reference operation. Digital I/O is 3V/5V compatible via dedicated OVDD pin, and serial communication uses standard SPI timing with CONVST-triggered conversion and BUSY status signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise digitization of ±10V analog signals |
| Sampling Rate | 100ksps - guarantees real-time acquisition of signals up to 50kHz Nyquist bandwidth |
| INL Error | ±1 LSB max - ensures monotonicity and <0.025% full-scale linearity error across operating temperature |
| Analog Input Range | ±10V bipolar - supports direct connection to industrial sensors and transducers without external level-shifting |
| Overvoltage Protection | ±30V on all MUX inputs - prevents damage or corruption during field wiring faults or transient events |
| Power Dissipation | 40mW at 100ksps - enables thermally constrained designs; reduces to 27.5mW (Nap) or 40µW (Sleep) during idle |
| Reference | Internal 2.50V ±10ppm/°C - eliminates external reference component count while maintaining system accuracy |
Pinout & Package
Package: 28-pin plastic SSOP (G package), exposed pad soldered to PCB ground for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COM (1) | Common reference for single-ended inputs | Low-noise analog ground reference point; must be connected to clean AGND plane |
| CH0–CH7 (2–9) | Configurable analog multiplexer inputs | Support ±10V bipolar input with ±30V fault tolerance; software-selectable single-ended/differential mode |
| MUXOUT+ / MUXOUT– (10–11) | Differential multiplexer outputs | Drive ADC+ and ADC– directly; isolate MUX errors from conversion core |
| ADC+ / ADC– (12–13) | Differential analog inputs to SAR core | Accept rescaled ±2.048V differential signal from MUXOUT; define final conversion range |
| VREF (15) | 2.5V internal reference output | Bypass with 1µF tantalum to AGND; usable as external reference source or calibration point |
| REFCOMP (16) | 4.096V buffered reference output | Drives internal DAC; supports ≤2mA DC load; bypass with 10µF + 0.1µF for stability |
| CONVST (28) | Conversion start trigger | Rising-edge initiated; minimum 40ns pulse width required to enter hold mode reliably |
| BUSY (22) | Conversion status indicator | Active-low open-drain output; asserts low for ≤5µs during conversion; synchronizes read timing |
Key Features
| Feature | Design Value |
|---|---|
| Software-programmable input configuration | Per-channel selection of single-ended or differential mode via 8-bit SDI command, enabling flexible sensor interfacing |
| Channel fault isolation | ±30V overvoltage on any unselected channel does not affect conversion result of selected channel |
| Low-power shutdown modes | Nap mode (27.5mW) and Sleep mode (40µW) reduce system standby power without losing configuration state |
| 3V/5V digital I/O compatibility | Dedicated OVDD pin allows SDO and BUSY outputs to swing to 3V or 5V logic levels, simplifying mixed-voltage system integration |
| On-chip precision reference | Factory-trimmed 2.50V ±10ppm/°C reference eliminates need for external voltage reference IC and associated layout complexity |
Applications
| Industrial Process Control | Multiplexed Data Acquisition |
|---|---|
Use Scenario: Digitizing 4–20mA current loop outputs and ±10V analog sensor signals (e.g., pressure, temperature, flow) across multiple PLC I/O modules. IC Role / Device Role / Timing Role: 8-channel ADC with ±30V fault protection acts as front-end signal conditioner and digitizer; handles channel scanning at 100ksps aggregate rate. Use Value: Eliminates external protection diodes and level-shifting circuitry; ±1LSB INL ensures calibrated measurement repeatability across temperature. | Use Scenario: High-density DAQ cards for test benches acquiring synchronized voltage/current waveforms from multiple DUTs. IC Role / Device Role / Timing Role: Configurable MUX-ADC pair performs sequential sampling of up to eight channels with programmable input polarity and range. Use Value: Internal 2.5V reference and 1.6384× buffer enable stable ±10V full-scale without external components; SPI interface simplifies FPGA/DSP host integration. |
| High-Speed PC-Based DAQ | Digital Signal Processing Front-End |
Use Scenario: USB or PCIe DAQ devices for lab-grade oscilloscopes and spectrum analyzers requiring >100k samples/sec per channel. IC Role / Device Role / Timing Role: 12-bit SAR ADC provides deterministic 5µs conversion latency and BUSY-synchronized readout for real-time buffering. Use Value: 40mW active power and Sleep mode support portable/battery-powered instruments; 28-pin SSOP footprint enables compact multilayer PCB layouts. | Use Scenario: Sensor fusion preprocessing in motor drives or power inverters, where analog feedback signals (phase currents, bus voltage) feed DSP algorithms. IC Role / Device Role / Timing Role: Simultaneous sampling-capable ADC feeds time-aligned data to DSP via SPI; supports differential inputs for noise rejection in noisy EMI environments. Use Value: Channel-to-channel offset matching (<0.5 LSB) and gain matching (<5 LSB) ensure consistent phase current measurement accuracy across all three motor phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multiplexed, ±10V input ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606BSTZ | 16-bit resolution, parallel + SPI interface, ±10V input, no internal reference - requires external 2.5V ref | Higher resolution but larger 64-lead LQFP package; lacks ±30V fault protection on inputs | Select when absolute precision >12-bit is required and board space allows larger footprint; verify external reference stability meets system INL target |
| MAX11620ATI+ | 12-bit, 8-channel, ±10V input, internal reference, but only 250ksps max - no Nap/Sleep modes | Higher speed but higher 55mW active power; uses 24-pin TQFN vs. 28-pin SSOP - different thermal and routing constraints | Select for cost-sensitive, high-throughput applications where lower standby power is not critical and smaller package is preferred |
Compared with AD7606BSTZ and MAX11620ATI+, the LTC1854IG#TRPBF uniquely balances ±30V fault robustness, low-power shutdown, internal reference integration, and 28-pin SSOP packaging - making it optimal for space-constrained industrial DAQ modules requiring field reliability and thermal efficiency.
Availability
LTC1854IG#TRPBF is available at Aetrix Electronics and suitable for industrial process control, multiplexed data acquisition systems, and high-speed PC-based DAQ requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-term lifecycle continuity.
Supply support for LTC1854IG#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 acquired Linear Technology in 2017 and maintains its high-performance precision analog product lines, including data converters, references, and signal conditioning ICs.
The LTC1854IG#TRPBF belongs to the LTC185x family of multichannel SAR ADCs designed specifically for industrial and instrumentation applications demanding robust ±10V bipolar input handling, integrated fault protection, and low-power operation in extended temperature ranges.
FAQ
What is the operating temperature range for the LTC1854IG#TRPBF?
The LTC1854IG#TRPBF is rated for industrial temperature operation from –40°C to +85°C. This is confirmed by the "I" grade suffix in the part number and specified in the Absolute Maximum Ratings table. All DC and dynamic specifications-including ±1LSB INL, 100ksps sampling rate, and ±30V fault protection-are guaranteed across this full range.
Does the LTC1854IG#TRPBF require an external reference?
No, the LTC1854IG#TRPBF includes a factory-trimmed 2.50V internal reference (VREF) and a 4.096V buffered output (REFCOMP) that fully support its ±10V full-scale range. External reference use is optional-only needed if higher initial accuracy or lower drift than ±10ppm/°C is required. The internal reference eliminates BOM and layout overhead in most industrial applications.
How does the LTC1854IG#TRPBF handle overvoltage conditions on unused channels?
The LTC1854IG#TRPBF provides ±30V fault protection on all CH0–CH7 and COM inputs. If an overvoltage occurs on an unselected channel, the internal protection circuitry clamps the input without latch-up or performance degradation. Critically, the conversion result of the currently selected channel remains unaffected-ensuring data integrity in harsh industrial environments with potential wiring faults.
What digital interface protocol does the LTC1854IG#TRPBF support?
The LTC1854IG#TRPBF supports SPI and MICROWIRE-compatible serial communication using four dedicated pins: SCK (clock), SDI (data in), SDO (data out), and RD (read enable). It operates in standard mode with CONVST-triggered conversion and BUSY-driven read synchronization. No special framing or proprietary protocol is required-enabling direct connection to standard microcontrollers, FPGAs, and DSPs.
Can the LTC1854IG#TRPBF interface with 3V logic systems?
Yes. The LTC1854IG#TRPBF supports 3V/5V digital compatibility via its dedicated OVDD pin, which sets the output voltage swing of SDO and BUSY. Digital inputs (SCK, SDI, CONVST, RD) accept 3V or 5V logic levels regardless of OVDD setting. This allows seamless integration into mixed-voltage systems-for example, interfacing a 5V ADC core to a 3.3V FPGA I/O bank without level shifters.
LTC1854IG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1854IG#TRPBF FAQ
1.How can I place an order for LTC1854IG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1854IG#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 LTC1854IG#TRPBF reliable?
The price and inventory of LTC1854IG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1854IG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1854IG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1854IG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1854IG#TRPBF?
LTC1854IG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1854IG#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 LTC1854IG#TRPBF?
For technical support, including LTC1854IG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1854IG#TRPBF requirements.
6.How does Aetrix verify that LTC1854IG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1854IG#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 LTC1854IG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1854IG#TRPBF?
All LTC1854IG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1854IG#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 LTC1854IG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1854IG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1854IG#TRPBF 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…
