My Inquiry
My Account
Analog Devices Inc. LTC1865ACS8#PBF
- Part No.:
- LTC1865ACS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1865ACS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:194
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1865ACS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with software-selectable dual-channel multiplexer, single 5V supply operation, and SPI/MICROWIRE-compatible serial interface in an 8-lead SO package. It features auto shutdown (2μA at 1ksps), true differential input capability, and guaranteed operation from 0°C to 70°C - ideal for compact, battery-powered data acquisition systems requiring high resolution without external gain stages.
For engineers reviewing the LTC1865ACS8#PBF datasheet, LTC1865ACS8#PBF pinout, LTC1865ACS8#PBF application, or LTC1865ACS8#PBF equivalent, key selection criteria include its 2-channel MUX configuration, VREF-tied-to-VCC architecture in SO-8, 87dB SNR, ±2mV offset error, and compatibility with ratiometric sensing or external references down to 1V full scale.
Technical Context
The LTC1865ACS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting both single-ended and differential input modes via a 2-bit configuration word shifted into SDI. Its SO-8 variant fixes VREF internally to VCC, eliminating external reference components while maintaining rail-to-rail input range on CH0/CH1 relative to GND.
Timing is controlled by the CONV signal initiating conversion, followed by full-duplex serial transfer synchronized to SCK; conversion completes in 3.2μs max, enabling deterministic 250ksps sampling. Power management is automatic: supply current drops from 850μA at full speed to 2μA during idle, with no external control required beyond CONV assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes for high-precision measurement of small signal changes |
| Max Sampling Rate | 250ksps - supports real-time capture of signals up to 125kHz full linear bandwidth |
| Supply Current | 850μA typical at 250ksps - enables multi-year battery life in portable instrumentation |
| SNR | 87dB - ensures clean digitization of low-amplitude analog signals with minimal quantization noise |
| INL Error | ±6 LSB max - guarantees monotonicity and accurate end-point linearity across full temperature range |
| Offset Error | ±2 mV - minimizes zero-scale calibration burden in sensor front-end designs |
| Input Span | 0V to VCC - eliminates need for external level-shifting when using single 5V supply |
Pinout & Package
Package: 8-lead plastic SO (Small Outline), surface-mount, JEDEC MS-012AC compliant, θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Input | Active-high trigger initiates conversion; held high after completion forces auto shutdown |
| CH0 | Analog Input Channel 0 | Positive input for single-ended or differential mode; referenced to GND in SO-8 package |
| CH1 | Analog Input Channel 1 | Positive input for differential mode or negative input for single-ended mode |
| GND | Analog Ground | Single ground reference for all analog circuitry; must connect directly to analog ground plane |
| SDI | Digital Data Input | Receives 2-bit MUX configuration word (SGL/DIFF, ODD/SIGN) before each conversion |
| SDO | Digital Data Output | Serial 16-bit result shifted out MSB-first on falling SCK edge; tri-stated when CONV high |
| SCK | Shift Clock Input | Master clock synchronizing full-duplex data transfer; max frequency 20MHz (H-grade) |
| VCC | Positive Supply | Single 4.75V–5.25V supply powering analog and digital sections; internally ties VREF in SO-8 |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Enables flexible signal routing (single-ended CH0/GND, CH1/GND or differential CH0/CH1) without hardware reconfiguration |
| VREF Internally Tied to VCC | Removes external reference component count and layout complexity in SO-8 version while preserving 0V–VCC input range |
| Auto Shutdown at Low Throughput | Reduces current to 2μA at 1ksps - critical for intermittent-sampling applications like environmental monitoring |
| True Differential Input Architecture | Rejects common-mode noise on CH0/CH1 pair, improving immunity in noisy industrial environments |
| Guaranteed Operation to +70°C | Validated performance over commercial temperature range without derating - simplifies thermal design |
Applications
| Portable Data Logger | Industrial Sensor Interface |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure at 100Hz intervals over weeks. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes analog outputs from two isolated sensors simultaneously, using internal VREF for ratiometric accuracy. Use Value: 850μA active current and 2μA sleep current extend battery life; SO-8 footprint minimizes PCB area in compact enclosures. | Use Scenario: PLC analog input module conditioning 4–20mA current loop signals from flow meters and pressure transmitters. IC Role / Device Role / Timing Role: Configured in differential mode to reject ground-loop noise between field sensors and controller backplane. Use Value: 87dB SNR and ±6 LSB INL ensure <0.1% measurement uncertainty; guaranteed 0°C–70°C operation suits factory-floor deployment. |
| Medical Vital Sign Monitor | Energy Meter Front-End |
Use Scenario: Wearable ECG device acquiring lead-I and lead-II signals with low-power, high-fidelity digitization. IC Role / Device Role / Timing Role: Uses CH0/CH1 as true differential inputs to capture biopotential signals while rejecting 50/60Hz interference. Use Value: 16-bit resolution resolves microvolt-level cardiac waveforms; auto shutdown conserves coin-cell energy between patient readings. | Use Scenario: Residential smart meter measuring voltage and current waveforms for real-time power calculation. IC Role / Device Role / Timing Role: Samples voltage (CH0) and current (CH1) channels synchronously at 250ksps for harmonic analysis up to 125kHz. Use Value: 250ksps throughput captures >20th harmonics of 50Hz mains; 87dB SNR supports Class 0.5 metering accuracy per IEC 62053. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IPW | 16-bit, 100ksps, SPI interface, 3.3V-only supply, no internal VREF tie | Requires external reference and level-shifting for 5V systems; lower throughput limits harmonic analysis depth | Select when 3.3V system integration and lower power (3.5mW) outweigh speed and simplicity needs |
| MAX11100ETE+ | 16-bit, 500ksps, internal reference, 2.7–3.6V supply, 12-pin TDFN | Higher speed but incompatible voltage domain; internal 2.048V ref requires gain scaling for 0–5V inputs | Select for ultra-low-power (<1.5mW) portable designs where 5V operation is not required |
Compared with ADS8325IPW and MAX11100ETE+, the LTC1865ACS8#PBF uniquely combines 5V single-supply operation, VREF-to-VCC integration, and 250ksps throughput in a standard SO-8 package - reducing BOM count and layout complexity for cost-sensitive industrial and medical data loggers.
Availability
LTC1865ACS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical vital sign monitors requiring stable component supply and long-term manufacturability.
Supply support for LTC1865ACS8#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1865ACS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-resolution measurement in space-constrained, battery-operated, and noise-sensitive applications.
FAQ
What is the maximum sampling rate supported by the LTC1865ACS8#PBF?
The LTC1865ACS8#PBF supports a maximum sampling rate of 250ksps, corresponding to a minimum conversion time of 3.2μs. This rate is achievable under recommended operating conditions (VCC = 4.75V to 5.25V, fSCK ≤ 20MHz) and enables full linear bandwidth up to 125kHz. Performance remains stable across the 0°C to 70°C commercial temperature range specified for the LTC1865ACS8#PBF.
Does the LTC1865ACS8#PBF require an external reference voltage?
No, the LTC1865ACS8#PBF does not require an external reference voltage. In its SO-8 package variant, VREF is internally tied to VCC, establishing a fixed 0V to VCC input span. This eliminates external reference components and simplifies layout while maintaining ratiometric accuracy for sensor interfaces powered from the same 5V rail.
How many analog input channels does the LTC1865ACS8#PBF support, and how are they configured?
The LTC1865ACS8#PBF supports two analog input channels (CH0 and CH1) with software-selectable configuration via a 2-bit word shifted into the SDI pin. Modes include single-ended (CH0/GND or CH1/GND) and differential (CH0/CH1), selected using SGL/DIFF and ODD/SIGN bits. This flexibility allows dynamic reconfiguration without hardware changes, making the LTC1865ACS8#PBF suitable for multi-sensor systems.
What is the supply current consumption of the LTC1865ACS8#PBF at different sampling rates?
The LTC1865ACS8#PBF draws 850μA typical at 250ksps and automatically reduces current during idle periods. At 1ksps, supply current drops to 2μA due to built-in auto shutdown - triggered when CONV remains high after conversion completes. This adaptive power management extends battery life in intermittent-sampling applications without requiring external control logic.
Is the LTC1865ACS8#PBF pin-compatible with earlier 12-bit versions like the LTC1860/LTC1861?
No, the LTC1865ACS8#PBF is not pin-compatible with the LTC1860 or LTC1861. While the LTC1865ACS8#PBF shares functional similarity (SPI interface, SO-8 package), its pinout differs: it uses SDI for configuration and CH0/CH1 for inputs, whereas the LTC1860/LTC1861 use IN+/IN− and lack multiplexing. Board redesign is required to migrate from those 12-bit parts to the LTC1865ACS8#PBF.
LTC1865ACS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 2
- Input Type:
- 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
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865ACS8#PBF FAQ
1.How can I place an order for LTC1865ACS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865ACS8#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 LTC1865ACS8#PBF reliable?
The price and inventory of LTC1865ACS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865ACS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1865ACS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865ACS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865ACS8#PBF?
LTC1865ACS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865ACS8#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 LTC1865ACS8#PBF?
For technical support, including LTC1865ACS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865ACS8#PBF requirements.
6.How does Aetrix verify that LTC1865ACS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1865ACS8#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 LTC1865ACS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1865ACS8#PBF?
All LTC1865ACS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865ACS8#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 LTC1865ACS8#PBF part is unused and in its original packaging.
Return procedure for LTC1865ACS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1865ACS8#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…
