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Analog Devices Inc. LTC1864AIMS8#PBF
- Part No.:
- LTC1864AIMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864AIMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:263
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Product details
Overview
LTC1864AIMS8#PBF 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 at full speed and auto-shutdown to 2μA at 1ksps. It features true differential analog inputs (IN+, IN–), adjustable external reference (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and guaranteed operation from –40°C to +85°C - ideal for portable instrumentation and isolated data acquisition systems.
For engineers reviewing the LTC1864AIMS8#PBF datasheet, LTC1864AIMS8#PBF pinout, LTC1864AIMS8#PBF application, or LTC1864AIMS8#PBF equivalent, key selection considerations include its 16-bit resolution with 87dB SNR, ±8 LSB INL (H-grade), 2.75μs conversion time, rail-to-rail input capability down to 1V full-scale, and MSOP-8 thermal performance (θJA = 210°C/W).
Technical Context
The LTC1864AIMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise 16-bit digitization without external components. Its differential input stage rejects common-mode noise, while the adjustable VREF pin supports ratiometric measurements or external precision references from 1V to 5V.
Conversion is initiated by a rising edge on CONV; after tCONV (2.75μs typ), the result is serially shifted out via SDO synchronized to SCK falling edges. Auto-power-down between conversions reduces current consumption proportionally to sampling rate - critical for battery-powered systems requiring high throughput without thermal penalty.
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 | 250ksps - supports real-time capture of signals up to 125kHz full-linear bandwidth. |
| Signal-to-Noise Ratio | 87dB - enables detection of low-amplitude signals buried in noise (e.g., sensor outputs). |
| Integral Nonlinearity | ±8 LSB (H-grade) - ensures monotonicity and accuracy across full temperature range (–40°C to +85°C). |
| Supply Current @ 250ksps | 850μA typ - allows continuous high-speed acquisition with minimal power budget impact. |
| Conversion Time | 2.75μs typ - defines minimum inter-conversion interval and system latency. |
| Reference Input Range | 1V to VCC (5V) - permits flexible scaling for low-voltage sensors or precision ratiometric setups. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm body, exposed pad not present, θJA = 210°C/W, rated for –40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VREF (1) | Reference Input | Defines full-scale span; must be low-noise and bypassed to AGND with ≥1μF capacitor. |
| IN+ (2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts 0V to VREF voltage difference. |
| IN– (3) | Differential Analog Input (–) | Common-mode rejection enabled when used with IN+; grounded for unipolar rail-to-rail input. |
| GND (4) | Analog Ground | Primary ground return for analog circuitry; must connect directly to analog ground plane. |
| CONV (5) | Convert Control Input | Rising edge starts conversion; held high after completion enters auto-sleep mode (2μA). |
| SDO (6) | Serial Data Output | 3-wire SPI/MICROWIRE-compatible output; data valid on SCK falling edge, captured on rising edge. |
| SCK (7) | Serial Clock Input | Master clock synchronizing 16-bit data transfer; max frequency 20MHz (H-grade). |
| VCC (8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1μF tantalum bypass to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces ICC from 850μA @ 250ksps to 2μA @ 1ksps - eliminates need for external power gating logic. |
| True differential input architecture | Rejects common-mode noise on IN+/IN– pair - essential for noisy industrial or isolated signal paths. |
| Adjustable reference input (1V to 5V) | Enables direct interfacing with low-output sensors (e.g., 1V thermocouple amps) without gain stages. |
| Guaranteed operation to +85°C | Validated performance over full industrial temperature range - no derating required for embedded designs. |
| MSOP-8 footprint compatibility | Pin-compatible with LTC1860/LTC1861 12-bit family - allows resolution upgrade without PCB redesign. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter or battery-powered environmental sensor node acquiring voltage, temperature, or pressure. IC Role / Device Role / Timing Role: Primary 16-bit digitizer capturing analog sensor outputs with minimal power overhead. Use Value: 850μA @ 250ksps and auto-sleep enable >100-hour battery life while maintaining high-resolution measurement fidelity. |
Use Scenario: Industrial PLC module measuring motor current or voltage across opto-isolated barriers. IC Role / Device Role / Timing Role: High-accuracy front-end ADC referenced to isolated supply, rejecting ground-loop noise. Use Value: True differential inputs and 87dB SNR preserve signal integrity despite high common-mode transients (>1kV/ms). |
| Low-Power Sensor Interface | Compact Signal Conditioning |
|
Use Scenario: Wireless IoT node using MEMS accelerometer or strain gauge with microamp-level bias requirements. IC Role / Device Role / Timing Role: Direct A/D converter accepting low-level differential outputs without external amplification. Use Value: 1V minimum reference support and ±1μA input leakage allow direct connection to high-impedance sensors. |
Use Scenario: Space-constrained medical device (e.g., patient monitor) digitizing ECG or EEG signals. IC Role / Device Role / Timing Role: Precision 16-bit sampling engine in 3mm × 3mm MSOP package minimizing board area. Use Value: MSOP-8 footprint and 2.75μs conversion time meet tight size and latency constraints without sacrificing resolution. |
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 only; no VREF pin - internal reference fixed at 2.5V. | Requires level-shifting for 5V systems; higher speed but incompatible supply domain and reference flexibility. | Select when 1MSPS is mandatory and system operates at ≤3.6V; avoid if external reference or 5V compatibility needed. |
| MAX11166ETE+ | 16-bit, 500ksps, internal 4.096V reference, 2.7V–3.6V supply; differential inputs supported but no adjustable VREF pin. | Lacks VREF adjustability and 5V operation; optimized for low-voltage precision, not industrial 5V environments. | Prefer for battery-powered 3.3V systems where fixed reference suffices; unsuitable for ratiometric or wide-VREF designs. |
Compared with ADS8860IDRCT and MAX11166ETE+, the LTC1864AIMS8#PBF uniquely combines 5V operation, user-adjustable 1V–5V reference, and guaranteed –40°C to +85°C performance in MSOP-8 - making it the only option supporting legacy 5V industrial signal chains with resolution upgrade path.
Availability
LTC1864AIMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power sensor interface applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade performance.
Supply support for LTC1864AIMS8#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 LTC1864AIMS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for high-resolution, low-power, single-supply operation in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling frequency of the LTC1864AIMS8#PBF?
The LTC1864AIMS8#PBF achieves a maximum sampling frequency of 250ksps under recommended operating conditions (VCC = 5V, fSCK ≤ 20MHz). This is validated across the full –40°C to +85°C temperature range and corresponds to a 2.75μs conversion time, enabling accurate capture of signals up to 125kHz full-linear bandwidth.
Does the LTC1864AIMS8#PBF support external reference voltages below 5V?
Yes, the LTC1864AIMS8#PBF supports external reference voltages from 1V to 5V on the VREF pin. This allows direct interfacing with low-output sensors (e.g., 1V bridge amplifiers) without gain stages, and enables ratiometric measurements where reference tracks supply or sensor excitation. Operation at 1V VREF maintains full 16-bit resolution and specified INL/SNR performance.
How does the auto-shutdown feature of the LTC1864AIMS8#PBF reduce power consumption?
The LTC1864AIMS8#PBF automatically powers down between conversions when the CONV pin remains high after conversion completes. At 1ksps, this reduces supply current from 850μA (250ksps) to just 2μA - a 425× reduction. This eliminates the need for external power control circuitry and extends battery life in portable applications without compromising wake-up latency or conversion accuracy.
Is the LTC1864AIMS8#PBF pin-compatible with earlier 12-bit versions?
Yes, the LTC1864AIMS8#PBF is pin-compatible with the 12-bit LTC1860 and LTC1861 families in the same MSOP-8 package. This allows seamless resolution upgrades in existing designs - retaining identical PCB layout, bypassing, and interface logic while gaining 16-bit precision, improved SNR (87dB vs ~72dB), and enhanced linearity (±8 LSB INL vs ±2 LSB).
What are the absolute maximum ratings for analog input voltage on the LTC1864AIMS8#PBF?
The absolute maximum analog input voltage range for the LTC1864AIMS8#PBF is (GND – 0.3V) to (VCC + 0.3V) on both IN+ and IN– pins. The differential input voltage (IN+ – IN–) must remain within 0V to VREF. Exceeding these limits risks permanent damage. For reliable operation, inputs should be limited to 0V–VREF differential swing with common-mode voltage centered at VREF/2 or referenced to GND.
LTC1864AIMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC1864AIMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864AIMS8#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 LTC1864AIMS8#PBF reliable?
The price and inventory of LTC1864AIMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864AIMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864AIMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864AIMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864AIMS8#PBF?
LTC1864AIMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864AIMS8#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 LTC1864AIMS8#PBF?
For technical support, including LTC1864AIMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864AIMS8#PBF requirements.
6.How does Aetrix verify that LTC1864AIMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864AIMS8#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 LTC1864AIMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864AIMS8#PBF?
All LTC1864AIMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864AIMS8#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 LTC1864AIMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864AIMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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