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Analog Devices Inc. LTC1864AIMS8#TRPBF
- Part No.:
- LTC1864AIMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864AIMS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,003
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Product details
Overview
LTC1864AIMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps single-channel differential successive approximation ADC in an 8-lead MSOP package, operating from a single 5V supply with 850μA typical supply current and guaranteed operation from –40°C to +85°C. It features true differential analog inputs (IN+, IN–), adjustable external reference (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and auto-shutdown between conversions.
For engineers reviewing the LTC1864AIMS8#TRPBF datasheet, LTC1864AIMS8#TRPBF pinout, LTC1864AIMS8#TRPBF application, or LTC1864AIMS8#TRPBF equivalent, this device is selected for high-resolution, low-power data acquisition where rail-to-rail input span (with VREF = VCC), 87dB SNR, and minimal board space are critical - especially in portable instrumentation, isolated sensor interfaces, and battery-operated systems requiring 16-bit precision at 250kSPS.
Technical Context
The LTC1864AIMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion without external components. Its differential input stage rejects common-mode noise, while the adjustable VREF pin supports full-scale spans from 1V to 5V - allowing direct connection to low-voltage signal sources without gain stages.
Conversion is initiated by a rising edge on CONV; after tCONV ≈ 3.2μs, the result appears on SDO, synchronized by SCK. The device automatically enters sleep mode (2μA at 1ksps) when CONV remains high post-conversion, delivering ultra-low power at reduced sampling rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete 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 (S/(N+D) ≥ 75dB). |
| Supply Current | 850μA typ at 250ksps - enables compact, battery-powered designs with minimal thermal load and no active cooling. |
| Signal-to-Noise Ratio | 87dB - ensures >14 effective bits (ENOB) in DC-coupled applications with clean analog layout. |
| INL Error | ±8 LSB max - guarantees monotonicity and accurate end-point linearity across full temperature range (–40°C to +85°C). |
| Reference Range | 1V to VCC (5V) - allows flexible scaling: e.g., 1V ref yields 15.3μV/LSB resolution for microvolt-level sensing. |
| Differential Input Range | 0V to VREF - supports true differential measurements (e.g., bridge sensors) with common-mode rejection. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm, exposed pad not present, θJA = 210°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference voltage input | Defines full-scale span; must be low-noise and bypassed with ≥1μF to AGND for stable 16-bit accuracy. |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance input sampled simultaneously with IN–; accepts 0V to VCC + 0.05V, rejecting common-mode noise. |
| IN– (Pin 3) | Differential analog input (–) | Paired with IN+; zero code occurs when IN+ – IN– = 0V; enables ratiometric measurements with sensor bridges. |
| GND (Pin 4) | Analog ground | Must connect directly to analog ground plane with short trace; separates analog return path from digital noise. |
| CONV (Pin 5) | Convert control input | Rising edge starts conversion; falling edge enables SDO output; high state after conversion triggers auto-sleep (2μA). |
| SDO (Pin 6) | Serial data output | 3-wire SPI/MICROWIRE-compatible; outputs 16-bit result MSB-first on SCK falling edge; Hi-Z when CONV high. |
| SCK (Pin 7) | Serial clock input | Synchronizes data transfer; max frequency 20MHz (H-grade); requires clean, low-jitter clock for timing-critical sampling. |
| VCC (Pin 8) | Positive supply | Single 4.75V–5.25V supply; requires local 1μF tantalum bypass to GND to suppress switching noise during conversion. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces supply current to 2μA at 1ksps - extends battery life in intermittent-sampling systems without firmware intervention. |
| True differential input architecture | Rejects common-mode noise up to 125kHz bandwidth - eliminates need for external instrumentation amplifiers in noisy industrial environments. |
| Adjustable reference input (1V to 5V) | Enables direct interfacing with low-output sensors (e.g., 10mV/V strain gauges) without gain stages, reducing component count and error sources. |
| Guaranteed operation to +85°C | Validated performance over full industrial temperature range - suitable for embedded systems in automotive under-hood or factory-floor enclosures. |
| Pin-compatible upgrade from 12-bit LTC1860/LTC1861 | Enables resolution upgrade without PCB redesign - preserves layout, footprint, and routing while doubling ENOB in existing 12-bit systems. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or portable oscilloscope front-end acquiring sensor or transducer signals. IC Role / Device Role / Timing Role: Primary 16-bit sampling ADC capturing analog waveforms at up to 250ksps with low power consumption. Use Value: 850μA supply current at full speed enables >10-hour battery life on two AA cells; differential input rejects EMI from internal digital circuitry. | Use Scenario: Sensor node in high-voltage industrial equipment using opto-isolated or transformer-coupled serial link. IC Role / Device Role / Timing Role: Isolated-side ADC digitizing analog sensor outputs before transmission across barrier. Use Value: Adjustable 1V–5V VREF allows matching of isolated reference source; 87dB SNR maintains resolution despite isolation-induced noise coupling. |
| Low-Power Battery-Operated Systems | Compact Embedded Monitoring |
Use Scenario: Wireless environmental sensor (temperature/humidity/pressure) transmitting data via BLE or LoRa. IC Role / Device Role / Timing Role: High-accuracy analog front-end converting conditioned sensor outputs prior to MCU ADC or direct SPI readout. Use Value: Auto-shutdown reduces average current to <10μA in sleep-between-readings mode - extends 10-year battery life in IoT deployments. | Use Scenario: Space-constrained PLC I/O module or motor drive feedback board requiring high-resolution current/voltage sensing. IC Role / Device Role / Timing Role: Precision analog input channel for closed-loop control or safety monitoring. Use Value: MSOP-8 footprint (3×3mm) saves >60% board area vs SO-8; ±8 LSB INL ensures calibration stability over temperature in uncooled enclosures. |
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 |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, SPI interface, 1.8V–3.6V supply; lower power (0.5mW at 100kSPS) but no differential input - only pseudo-differential. | Best for ultra-low-voltage, high-speed systems where single-ended inputs suffice and external op-amp buffering is acceptable. | Select ADS8860IDRCT when system operates below 3.6V and higher throughput justifies added signal conditioning complexity. |
| MAX11100ETE+ | 16-bit, 500kSPS, internal reference (4.096V), differential input, 2.7V–3.6V supply; no external VREF pin. | Suitable for fixed-reference, low-voltage applications like medical sensors - lacks VREF adjustability and 5V tolerance. | Choose MAX11100ETE+ when reference stability and integration outweigh flexibility; avoid if VREF scaling below 4.096V or 5V operation is required. |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1864AIMS8#TRPBF uniquely combines 5V operation, externally adjustable reference (1V–5V), true differential input, and guaranteed –40°C to +85°C performance in a space-saving MSOP-8 - making it optimal for industrial and portable 5V systems demanding design flexibility and proven ruggedness.
Availability
LTC1864AIMS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power battery-operated systems requiring stable component supply, long-term manufacturability, and industrial temperature support.
Supply support for LTC1864AIMS8#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 LTC1864AIMS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for space-constrained, low-power, high-resolution applications where 16-bit accuracy, differential input integrity, and robust industrial temperature operation are essential.
FAQ
What is the maximum sampling rate of the LTC1864AIMS8#TRPBF, and how does it affect power consumption?
The LTC1864AIMS8#TRPBF achieves a maximum sampling rate of 250ksps at 25°C with 850μA typical supply current. Power scales dynamically: at 1ksps, supply current drops to 2μA due to automatic shutdown between conversions. This behavior is inherent to the LTC1864AIMS8#TRPBF's architecture and requires no external control - enabling significant energy savings in duty-cycled systems without firmware overhead.
Does the LTC1864AIMS8#TRPBF support true differential input, and what is its common-mode rejection capability?
Yes, the LTC1864AIMS8#TRPBF supports true differential input via dedicated IN+ and IN– pins, with simultaneous sampling that inherently rejects common-mode noise. Its full linear bandwidth of 125kHz (S/(N+D) ≥ 75dB) confirms effective rejection up to that frequency. The LTC1864AIMS8#TRPBF does not specify a CMRR value, but measured performance shows >60dB rejection at 50Hz/60Hz - sufficient for industrial sensor interfaces without external instrumentation amplifiers.
Can the LTC1864AIMS8#TRPBF operate with a reference voltage lower than 5V, and what is the minimum supported VREF?
Yes, the LTC1864AIMS8#TRPBF supports adjustable reference voltages from 1V to 5V on the VREF pin. At 1V reference, full-scale range is 0V to 1V differential, yielding 15.3μV/LSB resolution - ideal for low-output sensors. Operation below 1V is not specified or guaranteed; the LTC1864AIMS8#TRPBF's reference input circuitry is designed for 1V–5V, and using lower voltages may cause missing codes or increased INL error.
What is the purpose of the CONV pin on the LTC1864AIMS8#TRPBF, and how should it be driven?
The CONV pin on the LTC1864AIMS8#TRPBF serves dual functions: a rising edge initiates conversion, and a logic low after conversion enables SDO output. If left high post-conversion, the LTC1864AIMS8#TRPBF enters auto-sleep (2μA). It must be driven by a clean CMOS-level signal (VIH ≥ 2.4V, VIL ≤ 0.8V) with fast edges (<10ns rise/fall); slow edges increase aperture jitter and degrade SNR. No external pull-up/down is required - the LTC1864AIMS8#TRPBF has internal biasing.
Is the LTC1864AIMS8#TRPBF pin-compatible with earlier 12-bit versions, and what benefits does that provide?
Yes, the LTC1864AIMS8#TRPBF is pin-compatible with the 12-bit LTC1860 and LTC1861 in the same MSOP-8 package. This allows direct replacement in existing designs to upgrade resolution from 12-bit to 16-bit without PCB modification, layout rework, or firmware changes - preserving BOM continuity while improving measurement fidelity, dynamic range, and noise floor performance in deployed systems.
LTC1864AIMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864AIMS8#TRPBF FAQ
1.How can I place an order for LTC1864AIMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864AIMS8#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 LTC1864AIMS8#TRPBF reliable?
The price and inventory of LTC1864AIMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864AIMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864AIMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864AIMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864AIMS8#TRPBF?
LTC1864AIMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864AIMS8#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 LTC1864AIMS8#TRPBF?
For technical support, including LTC1864AIMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864AIMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864AIMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864AIMS8#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 LTC1864AIMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864AIMS8#TRPBF?
All LTC1864AIMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864AIMS8#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 LTC1864AIMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864AIMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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