My Inquiry
My Account
Analog Devices Inc. LTC1865LCS8#TRPBF
- Part No.:
- LTC1865LCS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1865LCS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,175
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1865LCS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps, 2-channel software-selectable multiplexed successive approximation ADC in an 8-lead MSOP package, operating from a single 2.7V–3.6V supply with 450µA typical supply current at full speed and auto-shutdown to 10µA at 1ksps. It features true differential or single-ended analog inputs, external reference support (1V to VCC), SPI/MICROWIRE-compatible 3-wire serial interface, and integrated sample-and-hold - ideal for portable instrumentation and isolated data acquisition.
For engineers reviewing the LTC1865LCS8#TRPBF datasheet, LTC1865LCS8#TRPBF pinout, LTC1865LCS8#TRPBF application, or LTC1865LCS8#TRPBF equivalent, key selection criteria include its 16-bit resolution with ±6 LSB INL, 82dB SNR, 2-channel MUX configurability via SDI, MSOP-8 thermal performance (θJA = 210°C/W), and compatibility with low-noise analog front-ends using <200Ω source impedance.
Technical Context
The LTC1865LCS8#TRPBF implements a switched-capacitor SAR architecture with internal bias and shutdown control logic, enabling automatic power-down between conversions. Its dual-channel MUX is configured via a 2-bit word clocked into SDI on the rising edge of SCK after CONV falls - supporting four input combinations (single-ended CH0/GND, CH1/GND; differential CH0–CH1, CH1–CH0).
Analog input sampling occurs synchronously with the conversion start edge (CONV↑), with tSMPL = 14 SCK cycles; conversion completes in 3.7–4.66µs (tCONV). The device supports full-duplex serial communication, where SDO outputs conversion results on SCK falling edges while SDI accepts configuration bits on SCK rising edges - requiring precise timing coordination per the recommended operating conditions (fSCK ≤ 8MHz, tsuDI/tthDI = 30ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision sensor or transducer digitization. |
| Max Sampling Rate | 150ksps - supports real-time capture of signals up to ~20kHz full-linear bandwidth (S/(N+D) ≥ 75dB). |
| INL Error | ±6 LSB (typ) - ensures monotonicity and accurate end-point linearity over temperature without calibration. |
| SNR | 82 dB - enables detection of signals buried ~12 bits below noise floor in clean analog environments. |
| Supply Current | 450 µA (typ) at 150ksps; drops to 10 µA at 1ksps - reduces battery load in intermittent-sampling systems. |
| Reference Range | 1V to VCC (MSOP version) - allows flexible scaling from low-voltage sensors to rail-to-rail inputs when VREF = VCC. |
| Digital Interface | SPI/MICROWIRE-compatible 3-wire serial (CONV, SCK, SDO/SDI) - simplifies host MCU integration with minimal GPIO usage. |
Pinout & Package
Package: 8-lead MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, θJA = 210°C/W. RoHS-compliant, tape-and-reel (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span (1V to VCC); must be bypassed with ≥1µF tantalum to AGND for stable conversion accuracy. |
| CH0 (Pin 2) | Analog Input Channel 0 | Positive or negative input terminal depending on MUX configuration; high-impedance (>1GΩ) but requires low-source-impedance drive (<200Ω) for settling. |
| CH1 (Pin 3) | Analog Input Channel 1 | Second analog input used with CH0 for differential mode or as independent single-ended channel; shares same input structure and leakage specs as CH0. |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; must connect directly to analog ground plane with minimal trace length to avoid noise coupling. |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; falling edge enables SDO and clocks in 2-bit MUX configuration via SDI; high state triggers auto-shutdown. |
| SDI (Pin 6) | Serial Data Input | Accepts 2-bit MUX address (SGL/DIFF + ODD/SIGN) on rising SCK edges after CONV↓ - determines next conversion's input pair. |
| SDO (Pin 7) | Serial Data Output | Outputs 16-bit conversion result MSB-first on falling SCK edges; tri-stated when CONV is high or during configuration phase. |
| SCK (Pin 8) | Serial Clock Input | Drives synchronous full-duplex data transfer; max 8MHz frequency defines minimum conversion cycle time (16 SCK + tCONV). |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Enables dynamic reconfiguration between four input modes (CH0–GND, CH1–GND, CH0–CH1, CH1–CH0) without hardware changes. |
| Auto Shutdown Between Conversions | Reduces average current from 450µA to 10µA at 1ksps - extends battery life in duty-cycled measurement systems. |
| True Differential Input Architecture | Rejects common-mode noise on CH0/CH1 pairs, enabling accurate measurements in electrically noisy industrial environments. |
| No Minimum Data Transfer Rate | Allows indefinite idle periods between conversions - eliminates timing constraints on host processor scheduling. |
| High Impedance Analog Inputs | Input leakage ±1µA (max) and 12pF capacitance in sample mode permit direct connection to low-output-impedance sensors or op-amp buffers. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor node acquiring voltage, temperature, or pressure readings from multiple transducers. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog signals; performs 2-channel scanning with programmable gain stage synchronization. Use Value: 16-bit resolution and 150ksps throughput enable sub-millivolt DC accuracy and kHz-range transient capture within tight power budgets. | Use Scenario: Industrial PLC I/O module measuring field signals across galvanic isolation barriers (e.g., optocoupler or transformer-isolated RS-485 link). IC Role / Device Role / Timing Role: Isolated-side ADC converting sensor outputs before serial transmission; operates from local isolated 3.3V supply. Use Value: Low 450µA supply current minimizes heat generation on isolated side; external VREF allows ratiometric operation with isolated reference. |
| Low-Power Battery Monitoring | Compact Signal Conditioning Front-End |
Use Scenario: Li-ion battery pack monitor tracking cell voltages and temperatures in drones or medical wearables. IC Role / Device Role / Timing Role: Dual-channel ADC sequentially measuring cell voltage (CH0) and thermistor voltage (CH1) with shared reference. Use Value: Auto-shutdown cuts quiescent current to 10µA between samples, extending operational life on coin-cell or small LiPo batteries. | Use Scenario: Embedded test equipment digitizing outputs from precision op-amps (e.g., LT1469) driving bridge sensors or strain gauges. IC Role / Device Role / Timing Role: Final-stage ADC in signal chain; interfaces directly to op-amp output with no additional gain/level-shift stages required. Use Value: 1V–VCC reference range and rail-to-rail input capability allow direct connection to op-amps powered from same 3.3V rail. |
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 |
|---|---|---|---|
| LTC1864LCS8#TRPBF | Single-channel variant with identical 16-bit/150ksps performance, differential-only input, and same MSOP-8 package/pinout except SDI replaced by IN−. | Used where only one analog signal path is required; lacks software-configurable MUX but offers slightly better INL (±6 LSB vs ±8 LSB for LTC1865L). | Select when system requires only unipolar differential sensing and board layout reuse of LTC1865L footprint is acceptable (pin 6 repurposed). |
| ADS8326IDRCT | Texas Instruments 16-bit 500ksps SAR ADC in 10-pin VSSOP; higher speed, 2.7–5.5V supply, SPI-only interface (no SDI), fixed single-ended/differential mode per variant. | Targeted at higher-throughput applications needing >150ksps; lacks auto-shutdown and has higher 1.5mA supply current at full speed. | Choose when sampling rate >200ksps is mandatory and power budget permits higher active current; verify layout compatibility (10-pin vs 8-pin). |
Compared with LTC1864LCS8#TRPBF, the LTC1865LCS8#TRPBF adds channel flexibility at minor INL trade-off; versus ADS8326IDRCT, it trades speed and supply range for ultra-low power and integrated MUX control - making it optimal for battery-constrained, multi-sensor systems.
Availability
LTC1865LCS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power battery monitoring requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC1865LCS8#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 LTC1865LCS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for compact, low-power, high-resolution measurement systems where size, energy efficiency, and analog integrity are critical.
FAQ
What is the maximum clock frequency supported by the LTC1865LCS8#TRPBF serial interface?
The LTC1865LCS8#TRPBF supports a maximum SCK frequency of 8MHz under recommended operating conditions. This limit ensures reliable setup/hold timing for SDI (30ns) and proper SDO data validity (45–55ns delay after SCK↓). Exceeding 8MHz may cause misreads of the MUX configuration word or corrupted conversion data.
Does the LTC1865LCS8#TRPBF require an external reference voltage?
The LTC1865LCS8#TRPBF supports both external and internal reference configurations. In the MSOP-8 package (LTC1865LCS8#TRPBF), VREF is an external pin accepting 1V to VCC; in SO-8 variants, VREF is internally tied to VCC. For highest accuracy, an external precision reference like the LT1460DCS8-2.5 is recommended.
How does the auto-shutdown feature of the LTC1865LCS8#TRPBF reduce power consumption?
The LTC1865LCS8#TRPBF automatically enters low-current shutdown mode when CONV remains high after conversion completion, reducing supply current from 450µA (150ksps) to just 10µA at 1ksps. This dynamic scaling enables significant energy savings in burst-mode or event-triggered acquisition systems without firmware overhead.
Can the LTC1865LCS8#TRPBF perform simultaneous sampling of both channels?
No - the LTC1865LCS8#TRPBF uses a single SAR core with a software-selectable 2-channel MUX; it performs sequential conversions, not true simultaneous sampling. Each conversion captures one pair (e.g., CH0–CH1) at a time, with tCONV ≈ 4.66µs per sample. For synchronized dual-channel capture, external sample-and-hold circuits are required.
What is the absolute input voltage range allowed on CH0 and CH1 pins of the LTC1865LCS8#TRPBF?
Per the datasheet, the absolute input voltage range for CH0 and CH1 is –0.05V to VCC + 0.05V. However, the usable differential input range is 0V to VREF (for differential mode) or 0V to VREF (for single-ended mode referenced to GND). Exceeding these ranges risks code ambiguity or damage if input clamping diodes conduct.
LTC1865LCS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 150k
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865LCS8#TRPBF FAQ
1.How can I place an order for LTC1865LCS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LCS8#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 LTC1865LCS8#TRPBF reliable?
The price and inventory of LTC1865LCS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LCS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865LCS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LCS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LCS8#TRPBF?
LTC1865LCS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LCS8#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 LTC1865LCS8#TRPBF?
For technical support, including LTC1865LCS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LCS8#TRPBF requirements.
6.How does Aetrix verify that LTC1865LCS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LCS8#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 LTC1865LCS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865LCS8#TRPBF?
All LTC1865LCS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LCS8#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 LTC1865LCS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865LCS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1865LCS8#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…
