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Analog Devices Inc. LTC1864HMS8#TRPBF
- Part No.:
- LTC1864HMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864HMS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,716
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Product details
Overview
LTC1864HMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with true differential analog inputs, single 5V supply operation, and auto shutdown reducing supply current to 2μA at 1ksps. It features an adjustable reference input (1V to VCC), high-impedance analog inputs, and SPI/MICROWIRE™-compatible 3-wire serial interface - used in isolated data acquisition systems requiring precision, low power, and compact MSOP packaging.
For engineers reviewing the LTC1864HMS8#TRPBF datasheet, LTC1864HMS8#TRPBF pinout, LTC1864HMS8#TRPBF application, or LTC1864HMS8#TRPBF equivalent, key selection criteria include guaranteed operation to +125°C, ±8 LSB INL (H-grade), 87 dB SNR, full-scale range down to 1V, and compatibility with ratiometric or external reference architectures.
Technical Context
The LTC1864HMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input measurement (IN+ – IN–) referenced to an externally applied VREF. Its conversion timing is deterministic: tCONV = 2.75–3.3 μs (H-grade), synchronized by CONV rising edge and serial readout via SCK falling edges.
Digital control uses a single active-high CONV signal to initiate conversion and enable SDO output; no configuration word is required. Unlike the LTC1865, it lacks multiplexing or SDI input - confirming its identity as a fixed 1-channel, true-differential ADC optimized for simplicity and thermal robustness in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high dynamic range measurement |
| Max Sampling Rate | 250 ksps - supports real-time capture of signals up to 125 kHz full-linear bandwidth |
| Supply Current | 850 μA typical at 250 ksps; drops to 2 μA at 1 ksps via auto shutdown - enables battery-powered longevity |
| INL (H-grade) | ±8 LSB - ensures monotonicity and <0.12% full-scale linearity error over –40°C to +125°C |
| SNR | 87 dB - enables >14-bit effective resolution in noise-sensitive instrumentation |
| Reference Range | 1V to VCC - allows direct interfacing with low-voltage sensors without gain stages |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and downhole sensing |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3 mm × 3 mm, exposed pad not present, θJA = 210°C/W, rated for operation up to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span; accepts 1V–5.25V; must be bypassed with ≥1μF to AGND for stability |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; common-mode rejection improves 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 |
| GND (Pin 4) | Analog Ground | Single-point connection to analog ground plane; separates noise-sensitive analog return from digital paths |
| CONV (Pin 5) | Convert Control Input | Rising edge starts conversion; held high after completion to enter 2μA sleep mode; low enables SDO |
| SDO (Pin 6) | Serial Data Output | 16-bit result shifted out MSB-first on SCK falling edges; tri-stated when CONV is high |
| SCK (Pin 7) | Serial Clock Input | Accepts up to 20 MHz clock (H-grade); synchronizes data transfer; no setup/hold on SDO output |
| VCC (Pin 8) | Positive Supply | 4.75V–5.25V single supply; requires local 1μF tantalum bypass to GND for clean conversion |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise on IN+/IN– pair, enabling accurate measurement in electrically noisy environments |
| Auto Shutdown Between Conversions | Reduces average current from 850 μA (250 ksps) to 2 μA (1 ksps), extending battery life in portable instruments |
| H-Temperature Grade Qualification | Guaranteed 16-bit performance from –40°C to +125°C - suitable for engine control, power inverters, and avionics |
| Low Full-Scale Span Support | Operates with VREF as low as 1V, eliminating need for external amplifiers when interfacing with mV-range transducers |
| SPI/MICROWIRE™-Compatible Interface | 3-wire serial protocol with no SDI or configuration register - simplifies firmware, reduces GPIO count, and avoids timing complexity |
Applications
| Motor Phase Current Sensing | Isolated Industrial Data Acquisition |
|---|---|
Use Scenario: Measuring bidirectional current in IGBT gate drivers or inverter legs using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: Precision 16-bit digitization of differential voltage across shunt; synchronized to PWM period via CONV trigger. Use Value: ±8 LSB INL ensures accurate torque estimation; 250 ksps captures transient overcurrent events before protection trips. |
Use Scenario: Remote sensor nodes transmitting analog signals across opto- or capacitive isolators in PLC backplanes. IC Role / Device Role / Timing Role: Local A/D conversion at sensor side; low-power sleep mode minimizes isolated supply loading. Use Value: 2μA sleep current extends isolated DC/DC converter lifetime; 1V–5V VREF flexibility matches isolated reference outputs. |
| Automotive Battery Cell Monitoring | Portable Medical Instrumentation |
Use Scenario: High-accuracy voltage sampling of individual Li-ion cells in BMS stacks operating under under-hood temperatures. IC Role / Device Role / Timing Role: Direct cell voltage digitization with differential input rejecting pack-level common-mode transients. Use Value: +125°C rating eliminates derating; 87 dB SNR resolves sub-mV cell imbalances critical for state-of-charge accuracy. |
Use Scenario: Handheld ECG or impedance plethysmography devices requiring clinical-grade resolution and multi-day battery life. IC Role / Device Role / Timing Role: Front-end ADC for analog front-end op-amps; triggered only during measurement bursts. Use Value: Auto shutdown cuts idle power to nanoamp levels; 16-bit resolution captures microvolt-level bio-signals without amplification noise. |
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, but requires external reference and has no auto shutdown; consumes 1.5 mA at full speed | Higher speed but higher power; lacks H-grade temp qualification (–40°C to +85°C only) | Select when sampling rate >250 ksps is mandatory and thermal environment is benign |
| MAX11100ETE+ | 16-bit, 250 ksps, internal reference (4.096V), no VREF pin; sleep current 5 μA; SO-16 package | Fixed reference simplifies layout but limits full-scale flexibility; larger footprint and lower max temperature (85°C) | Select when board space allows SO-16 and reference voltage stability outweighs VREF adjustability |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1864HMS8#TRPBF uniquely combines H-grade temperature support, adjustable reference, ultra-low sleep current, and MSOP-8 compactness - making it optimal for thermally constrained, battery-aware, and ratiometric-sensing applications where design margin and long-term reliability are prioritized over raw speed or integration.
Availability
LTC1864HMS8#TRPBF is available at Aetrix Electronics and suitable for motor control feedback loops, isolated industrial data acquisition, and automotive battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1864HMS8#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 LTC1864 belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-accuracy, thermally robust measurement in space-constrained embedded systems.
FAQ
What is the maximum sampling frequency of the LTC1864HMS8#TRPBF at +125°C?
The LTC1864HMS8#TRPBF guarantees a maximum sampling frequency of 234 ksps over its full –40°C to +125°C operating range. At 25°C, it achieves 250 ksps, but thermal derating reduces the maximum usable rate to 234 ksps at the upper temperature limit - a specification explicitly validated in the H-grade characterization data.
Does the LTC1864HMS8#TRPBF support single-ended input configurations?
No, the LTC1864HMS8#TRPBF does not support single-ended inputs. It is strictly a true differential-input ADC: the output code represents the difference (IN+ – IN–). To measure a single-ended signal, IN– must be tied to a stable reference (e.g., GND or mid-supply), and the full-scale range becomes VREF - not 2×VREF - as confirmed in the functional description and transfer curve diagrams.
Can the LTC1864HMS8#TRPBF operate with a 3.3V supply?
No, the LTC1864HMS8#TRPBF requires a minimum supply voltage of 4.75V and is specified only for 5V operation (4.75V–5.25V). Its internal reference buffer, SAR capacitor array, and logic thresholds are designed for 5V compliance; operation below 4.75V violates Absolute Maximum Ratings and is not characterized or guaranteed.
What is the purpose of the CONV pin on the LTC1864HMS8#TRPBF, and how is it used?
The CONV pin on the LTC1864HMS8#TRPBF serves dual functions: a rising edge initiates conversion, and holding it high after conversion completes places the device in ultra-low-power sleep mode (2 μA). A falling edge enables the SDO pin for serial readout. This eliminates the need for separate CS or standby control lines - simplifying timing and reducing MCU GPIO usage in resource-constrained designs.
Is the LTC1864HMS8#TRPBF pin-compatible with earlier 12-bit versions like the LTC1860/LTC1861?
Yes, the LTC1864HMS8#TRPBF is pin-compatible with the LTC1860 and LTC1861 in the MSOP-8 package, sharing identical pinout (VREF, IN+, IN–, GND, CONV, SDO, SCK, VCC). This allows drop-in 16-bit resolution upgrades in existing layouts without PCB revision - a feature explicitly stated in the datasheet's "Pin Compatible with 12-Bit LTC1860/LTC1861" bullet.
LTC1864HMS8#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):
- 150k
- 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 ~ 125°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864HMS8#TRPBF FAQ
1.How can I place an order for LTC1864HMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864HMS8#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 LTC1864HMS8#TRPBF reliable?
The price and inventory of LTC1864HMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864HMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864HMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864HMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864HMS8#TRPBF?
LTC1864HMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864HMS8#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 LTC1864HMS8#TRPBF?
For technical support, including LTC1864HMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864HMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864HMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864HMS8#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 LTC1864HMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864HMS8#TRPBF?
All LTC1864HMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864HMS8#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 LTC1864HMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864HMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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