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Analog Devices Inc. LTC1864LIS8#TRPBF
- Part No.:
- LTC1864LIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1864LIS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,904
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Product details
Overview
LTC1864LIS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps successive approximation ADC with true differential analog input, single 3V supply operation, and auto-shutdown power management. It features 450µA typical supply current at full speed, 82dB SNR, ±8 LSB INL, and operates in the –40°C to 85°C industrial temperature range. It is used in precision portable instrumentation requiring high resolution without external gain stages.
For engineers reviewing the LTC1864LIS8#TRPBF datasheet, LTC1864LIS8#TRPBF pinout, LTC1864LIS8#TRPBF application, or LTC1864LIS8#TRPBF equivalent, key selection criteria include its differential input architecture, MSOP-8 package compatibility, 3-wire SPI/MICROWIRE interface, rail-to-rail input capability with external reference, and low-power sampling down to 1ksps with 10µA sleep current.
Technical Context
The LTC1864LIS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input measurement where full-scale equals VREF − 1 LSB. Its conversion timing is fixed at 3.7–4.66 µs, synchronized by the rising edge of CONV and data readout via SDO on falling SCK edges.
It uses a 3-wire serial interface (CONV, SCK, SDO) with no minimum data transfer rate requirement, enabling flexible host controller integration. The device powers down automatically between conversions, reducing current from 450µA at 150ksps to 10µA at 1ksps - a feature enabled by internal state control tied directly to the CONV signal level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 part-in-65,536 quantization granularity for high-precision sensor or transducer digitization. |
| Max Sampling Rate | 150ksps - supports real-time acquisition of signals up to ~20kHz full-linear bandwidth (S/(N+D) ≥ 75dB). |
| Supply Current | 450µA typ @ 150ksps; drops to 10µA @ 1ksps - enables battery-powered operation for >1 year in duty-cycled systems. |
| INL Error | ±8 LSB max - ensures monotonicity and <0.12% end-point linearity error across full scale. |
| SNR | 82dB - corresponds to ~13.3 effective bits (ENOB) at 1kHz input, suitable for 16-bit system accuracy. |
| Input Range | 0V to VREF (differential); supports 1V–3.6V VREF - allows direct connection to low-voltage sensors without gain amplification. |
| Interface | SPI/MICROWIRE-compatible 3-wire serial (CONV/SCK/SDO) - simplifies MCU GPIO usage and eliminates SDI pin overhead. |
Pinout & Package
Package: 8-lead MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, lead coplanarity ≤ 0.102mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span; accepts 1V to VCC (≤3.6V); must be low-noise and bypassed with ≥1µF to AGND. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN−; common-mode rejection enables noise immunity. |
| IN− (Pin 3) | Differential Analog Input (−) | Paired with IN+; zero code occurs when IN+ − IN− = 0V; supports rail-to-rail input when IN− = GND and VREF = VCC. |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; must connect directly to analog ground plane with minimal trace length. |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; high hold enables auto-shutdown; low enables SDO output for data readout. |
| SDO (Pin 6) | Serial Data Output | 16-bit result shifted out MSB-first on falling SCK edges; tri-stated when CONV = high or during conversion. |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports DC to 8MHz; no minimum clock rate required for valid readout. |
| VCC (Pin 8) | Positive Supply | Single 2.7V–3.6V supply; requires local 1µF tantalum bypass to GND to suppress switching noise during conversion. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input | Rejects common-mode noise on IN+/IN− pair, enabling accurate measurement in electrically noisy environments (e.g., motor drives, industrial sensors). |
| Auto Shutdown Power Management | Reduces ICC from 450µA to 10µA between conversions - eliminates need for external power-gating logic in low-duty-cycle systems. |
| External Reference Flexibility | Supports VREF from 1V to VCC, allowing optimization of dynamic range for low-voltage signal sources without external scaling. |
| No Minimum Data Rate | Permits arbitrarily slow SCK clocking - ideal for resource-constrained microcontrollers or systems with variable processing latency. |
| Pin Compatibility | Drop-in replacement for 12-bit LTC1860L/LTC1861L - enables resolution upgrade without PCB redesign. |
Applications
| Portable Precision Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor node measuring thermocouple or bridge outputs with µV-level resolution. IC Role / Device Role / Timing Role: Primary 16-bit digitizer capturing differential sensor voltage; conversion triggered by MCU on demand; data read via SPI. Use Value: Eliminates external instrumentation amplifier due to high-Z differential input and 1V–3.6V VREF support, reducing BOM count and board area. | Use Scenario: Industrial PLC analog input module with galvanic isolation between field-side sensors and controller-side digital bus. IC Role / Device Role / Timing Role: Isolated-side ADC converting sensor signals before opto- or capacitive isolation; CONV signal gated through isolator to synchronize sampling. Use Value: Low 450µA active current and 10µA sleep current minimize isolated power budget; differential input rejects common-mode transients induced across isolation barrier. |
| Low-Power Battery-Operated Systems | Compact Signal Conditioning Front-End |
Use Scenario: Wireless condition monitoring node logging vibration or pressure over multi-year battery life. IC Role / Device Role / Timing Role: Event-triggered ADC activated only during scheduled wake-up intervals; remains in 10µA shutdown between samples. Use Value: Enables >5-year operation on a single CR2032 coin cell when sampling at 1ksps average rate - validated by measured sleep current vs temperature curves. | Use Scenario: Miniature medical sensor pod (e.g., ECG front-end) integrating gain, filtering, and digitization in <100mm² footprint. IC Role / Device Role / Timing Role: Final-stage ADC after programmable-gain amplifier (e.g., LTC6910-1); interfaces directly to MCU via 3-wire SPI. Use Value: MSOP-8 package and pin compatibility with 12-bit predecessors allow seamless migration to 16-bit resolution without layout changes. |
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 |
|---|---|---|---|
| ADS8325IDR | 16-bit, 100ksps, SPI interface, 2.7–5.5V supply, 2.5mW power at 100ksps; no auto-shutdown; requires external REF. | Lower max sample rate; higher power at equivalent speed; lacks integrated shutdown control - needs external enable logic. | Choose when operating from 5V supply or requiring guaranteed 100ksps performance with external reference stability. |
| LTC2311CDDB-16#TRMPBF | 16-bit, 500ksps, pseudo-differential input, 2.5–5.5V supply, 4.5mW at 500ksps; no CONV pin - uses CS-driven timing. | Higher speed and power; different control protocol (CS-based vs CONV-triggered); limited to pseudo-differential (IN+ to GND) mode. | Choose when system demands >150ksps throughput or supports CS-based SPI timing, and differential input is not mandatory. |
Compared with ADS8325IDR and LTC2311CDDB-16#TRMPBF, the LTC1864LIS8#TRPBF uniquely combines 150ksps sampling, true differential input, auto-shutdown, and 3V-only operation in an MSOP-8 package - making it optimal for space- and power-constrained industrial and portable designs where precise differential measurement is essential.
Availability
LTC1864LIS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power battery-operated systems requiring stable component supply and long-term lifecycle support.
Supply support for LTC1864LIS8#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 LTC1864LIS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for compact, low-power, high-resolution measurement systems where differential input integrity and supply flexibility are critical.
FAQ
What is the operating temperature range of the LTC1864LIS8#TRPBF?
The LTC1864LIS8#TRPBF is specified for operation from –40°C to +85°C (industrial grade). This range is confirmed in the Absolute Maximum Ratings table and applies to all DC and AC specifications unless otherwise noted. The "I" suffix in the part number explicitly denotes this extended temperature grade.
Does the LTC1864LIS8#TRPBF require an external reference voltage?
Yes, the LTC1864LIS8#TRPBF requires an external reference voltage applied to the VREF pin (Pin 1). It supports VREF from 1V to VCC (2.7–3.6V), enabling ratiometric or absolute measurements. Unlike some variants, the SO-8 version of LTC1864L ties VREF internally to VCC, but the MSOP-8 LTC1864LIS8#TRPBF retains the external VREF pin for full flexibility.
How does the auto-shutdown feature work on the LTC1864LIS8#TRPBF?
The LTC1864LIS8#TRPBF enters auto-shutdown when the CONV pin remains high after conversion completes. In this state, supply current drops to ≤10µA. Conversion resumes on the next rising edge of CONV. This behavior is intrinsic to the internal state machine and requires no external control signals - simplifying low-power system design.
Can the LTC1864LIS8#TRPBF interface directly with a 3.3V microcontroller SPI port?
Yes, the LTC1864LIS8#TRPBF is fully compatible with 3.3V logic systems. Its digital inputs (CONV, SCK) accept VIH ≥ 1.9V and VIL ≤ 0.45V at VCC = 2.7V; outputs (SDO) drive VOH ≥ 2.3V and VOL ≤ 0.3V under 400µA load - meeting standard 3.3V CMOS thresholds. No level-shifting is needed.
What is the maximum clock frequency supported by the SCK pin of the LTC1864LIS8#TRPBF?
The SCK pin of the LTC1864LIS8#TRPBF supports a maximum clock frequency of 8MHz, as specified in the Recommended Operating Conditions table. This allows full 16-bit readout in ≤2µs, well within the 3.7–4.66µs conversion time window - ensuring reliable timing margin for MCU firmware implementation.
LTC1864LIS8#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:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864LIS8#TRPBF FAQ
1.How can I place an order for LTC1864LIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864LIS8#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 LTC1864LIS8#TRPBF reliable?
The price and inventory of LTC1864LIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864LIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864LIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864LIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864LIS8#TRPBF?
LTC1864LIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864LIS8#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 LTC1864LIS8#TRPBF?
For technical support, including LTC1864LIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864LIS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864LIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864LIS8#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 LTC1864LIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864LIS8#TRPBF?
All LTC1864LIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864LIS8#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 LTC1864LIS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864LIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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