My Inquiry
My Account
Analog Devices Inc. LTC1854CG#TRPBF
- Part No.:
- LTC1854CG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1854CG#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,872
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1854CG#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 8-channel, 100ksps analog-to-digital converter with ±10V bipolar input range, single-ended or differential programmable MUX, ±30V fault protection on all inputs, and SPI/MICROWIRE™-compatible serial interface. It operates from a single 5V supply and integrates a precision 2.5V internal reference, supporting industrial process control and multiplexed data acquisition systems.
For engineers reviewing the LTC1854CG#TRPBF datasheet, LTC1854CG#TRPBF pinout, LTC1854CG#TRPBF application, or LTC1854CG#TRPBF equivalent, key selection criteria include its ±1LSB INL, 40mW typical power dissipation at full rate, Nap/Sleep shutdown modes (27.5mW / 40µW), ±10V input range with overvoltage tolerance, and 28-pin SSOP package compatibility with legacy LTC1854 designs.
Technical Context
The LTC1854CG#TRPBF implements a successive approximation register (SAR) architecture with integrated sample-and-hold, internal 5µs trimmed clock, and resistor-divider-based input scaling that eliminates multiplexer on-resistance errors. Its 8-channel analog MUX supports per-channel software-programmable configuration for single-ended or differential pairs.
Conversion control uses asynchronous CONVST (rising-edge start) and BUSY status signaling, while serial data transfer follows SPI timing with RD-gated SDO output. The device supports both internal (2.5V VREF, 4.096V REFCOMP) and external reference operation, with dedicated OVDD pin enabling 3V–5V digital I/O compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise quantization of ±10V signals |
| Sampling Rate | 100ksps - guaranteed maximum throughput with 4µs conversion time and 1µs acquisition time |
| INL Error | ±1 LSB - ensures monotonicity and <0.025% full-scale linearity error across temperature |
| Analog Input Range | ±10V bipolar - supports direct connection to industrial sensors without external signal conditioning |
| Input Overvoltage Protection | ±30V on CH0–CH7 and COM - prevents damage during transient faults without affecting selected channel accuracy |
| Power Dissipation | 40mW at 100ksps - enables thermally constrained embedded designs; reduces to 27.5mW (Nap) or 40µW (Sleep) |
| Digital Interface | SPI/MICROWIRE™-compatible - supports standard microcontroller/DSP serial peripherals with 3V/5V I/O flexibility via OVDD |
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 isolated from digital return paths |
| CH0–CH7 (2–9) | Analog multiplexer inputs | ±30V fault-protected channels accepting ±10V signals; configurable as SE or differential pairs |
| MUXOUT+ / MUXOUT– (10–11) | Multiplexer differential output | Drives ADC+ and ADC–; decoupled internally to minimize crosstalk and switching noise |
| ADC+ / ADC– (12–13) | Differential analog input to SAR core | High-impedance sampling node; requires low-source-impedance drive for <1LSB INL compliance |
| VREF (15) | 2.5V internal reference output | Bypassed with 1µF tantalum; used for DAC scaling and external calibration references |
| REFCOMP (16) | 4.096V buffered reference output | Drives internal DAC; supports ≤2mA DC load; bypassed with 10µF + 0.1µF for stability |
| CONVST (28) | Conversion start trigger | Rising-edge sensitive; initiates acquisition and conversion sequence with 40ns minimum pulse width |
| RD (27) | Serial data read enable | Active-low gate for SDO; allows three-state output control in shared-bus configurations |
| SDO / SDI / SCK (23,25,26) | SPI serial interface signals | Supports standard SPI clocking up to 20MHz; SDO outputs two's complement 12-bit data MSB-first |
| BUSY (22) | Conversion status indicator | Active-low open-drain output; asserts low for entire 4–5µs conversion period |
Key Features
| Feature | Design Value |
|---|---|
| Software-programmable MUX | Per-channel SE/differential selection via 8-bit configuration word eliminates external switch ICs and layout complexity |
| ±30V input fault protection | Prevents latch-up or damage during sensor disconnects or wiring faults without degrading accuracy of active channel |
| Internal 2.5V reference with 10ppm/°C TC | Reduces BOM count and board space; eliminates need for external precision reference in cost-sensitive applications |
| 3V/5V digital I/O compatibility | OVDD pin enables direct interfacing to mixed-voltage systems without level shifters or additional logic |
| Nap and Sleep power shutdown modes | Enables dynamic power scaling in battery-powered or thermally limited systems while retaining configuration state |
Applications
| Industrial Process Control | Multiplexed Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring multiple pressure, temperature, and flow transducers in PLC backplanes or distributed I/O modules. IC Role / Device Role / Timing Role: 8-channel simultaneous-sampling-capable ADC with ±10V range and ±30V fault tolerance serving as front-end digitizer. Use Value: Eliminates external signal conditioning for standard industrial sensors; maintains accuracy during field-wiring transients. | Use Scenario: High-density analog input cards for test equipment requiring >8 channels with minimal PCB area. IC Role / Device Role / Timing Role: Low-power, 100ksps SAR ADC with integrated MUX and reference reducing component count per channel. Use Value: Cuts bill-of-materials by integrating MUX, reference, and clock-enabling 28-pin SSOP footprint per 8 channels. |
| High-Speed PC-Based DAQ | Digital Signal Processing Front-End |
Use Scenario: USB or PCIe DAQ cards acquiring synchronized multi-sensor data for vibration analysis or acoustic monitoring. IC Role / Device Role / Timing Role: SPI-interfaced ADC providing deterministic 100ksps throughput with BUSY/CONVST handshaking for host synchronization. Use Value: Enables real-time streaming without FIFO overflow risk due to guaranteed 4µs conversion time and low jitter aperture delay (60ps). | Use Scenario: Sensor preprocessing stage feeding FPGAs or DSPs in motor control or power quality analyzers. IC Role / Device Role / Timing Role: Precision ADC with ±1LSB INL and 74dB SINAD delivering clean digital samples for FFT-based algorithms. Use Value: Maintains signal integrity through high CMRR (96dB) and channel-to-channel isolation (–120dB), minimizing cross-talk in multi-axis measurements. |
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 |
|---|---|---|---|
| ADS8684IPWR | 16-bit resolution, 500ksps, SPI interface, ±10.24V range, no integrated reference, requires external REF5025 | Higher resolution and speed but larger footprint (32-QFN) and higher power (12mW active); lacks ±30V fault protection | Select when absolute precision >12-bit and throughput >100ksps are required; verify overvoltage handling with external protection circuitry |
| MAX11620EUB+ | 12-bit, 100ksps, 8-channel, SPI, ±10V range, internal reference, but only ±16.5V fault rating and 20-pin µMAX package | Smaller package but lower overvoltage margin; lacks Nap/Sleep modes and REFCOMP buffer output | Choose for space-constrained designs where ±16.5V protection suffices and reference buffering is not needed |
Compared with ADS8684IPWR and MAX11620EUB+, the LTC1854CG#TRPBF uniquely combines ±30V fault protection, integrated 4.096V REFCOMP buffer, and dual low-power shutdown modes in a mature 28-SSOP package-making it optimal for industrial field instrumentation where robustness and design longevity are critical.
Availability
LTC1854CG#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, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1854CG#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1854CG#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for ruggedized, multichannel industrial sensing applications demanding fault tolerance, integrated references, and low-power operation.
FAQ
What is the guaranteed sampling rate for the LTC1854CG#TRPBF?
The LTC1854CG#TRPBF guarantees a maximum sampling rate of 100ksps across its full operating temperature range (0°C to 70°C). This is achieved via an internal trimmed clock ensuring ≤5µs conversion time and ≥1µs acquisition time. At 25°C, typical performance reaches 166ksps when using only the dedicated ADC+ and ADC– pins, but system-level timing must account for MUX settling and serial readout overhead.
Does the LTC1854CG#TRPBF require an external reference?
No, the LTC1854CG#TRPBF does not require an external reference. It integrates a factory-trimmed 2.5V bandgap reference (VREF) and a 4.096V buffered output (REFCOMP) optimized for driving the internal DAC. External references may be used for higher accuracy, but doing so disables the internal reference and requires proper biasing of VREF and REFCOMP pins per the datasheet.
How does the ±30V fault protection work on the LTC1854CG#TRPBF inputs?
The ±30V fault protection on CH0–CH7 and COM inputs is implemented via internal clamping diodes and robust input structures that safely shunt overvoltage currents (>100mA) without latch-up. Critically, a fault on any unselected channel does not affect the conversion result of the selected channel-ensuring measurement integrity during field wiring faults or sensor disconnection events.
What are the power consumption modes of the LTC1854CG#TRPBF?
The LTC1854CG#TRPBF offers three power states: active (40mW at 100ksps), Nap mode (27.5mW), and Sleep mode (40µW). Nap mode reduces current draw while preserving configuration and reference bias; Sleep mode shuts down the reference and clock, requiring reinitialization on wake-up. Both low-power modes are controlled via the 8-bit configuration word written to SDI during setup.
Can the LTC1854CG#TRPBF interface directly with a 3.3V microcontroller?
Yes, the LTC1854CG#TRPBF can interface directly with a 3.3V microcontroller. Its digital inputs (CONVST, RD, SDI, SCK) accept 3V logic levels, and the OVDD pin allows setting the output swing of SDO and BUSY to 3.3V. When OVDD = 3.3V, SDO drives between 0V and 3.3V, matching standard 3.3V IO thresholds without level shifters.
LTC1854CG#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1854CG#TRPBF FAQ
1.How can I place an order for LTC1854CG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1854CG#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 LTC1854CG#TRPBF reliable?
The price and inventory of LTC1854CG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1854CG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1854CG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1854CG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1854CG#TRPBF?
LTC1854CG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1854CG#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 LTC1854CG#TRPBF?
For technical support, including LTC1854CG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1854CG#TRPBF requirements.
6.How does Aetrix verify that LTC1854CG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1854CG#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 LTC1854CG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1854CG#TRPBF?
All LTC1854CG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1854CG#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 LTC1854CG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1854CG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1854CG#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…
