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Analog Devices Inc. LTC1867LIGN#PBF
- Part No.:
- LTC1867LIGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LIGN#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
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Product details
Overview
LTC1867LIGN#PBF from Analog Devices is a 16-bit, 175ksps successive-approximation ADC with integrated 1.25V reference, 8-channel analog multiplexer supporting true differential or single-ended inputs in unipolar (0V–2.5V) or bipolar (±1.25V) modes, SPI/MICROWIRE interface, and AEC-Q100 qualification for automotive use.
For engineers reviewing the LTC1867LIGN#PBF datasheet, LTC1867LIGN#PBF pinout, LTC1867LIGN#PBF application, or LTC1867LIGN#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance over temperature, ±3LSB INL, 83.7dB SNR at 1kHz, low-power operation (750µA at full rate), and compatibility with external 3V reference via REFCOMP for enhanced dynamic range.
Technical Context
The LTC1867LIGN#PBF implements a capacitive SAR architecture with differential input sampling, internal 1.25V bandgap reference buffered to 2.5V at REFCOMP, and configurable 7-bit control word for channel selection, input mode (single-ended/differential), polarity (unipolar/bipolar), and sleep activation. Conversion timing is factory-trimmed for 3.2µs typical conversion time and 1.68µs acquisition time.
Its serial interface operates with CS/CONV as dual-function pin (conversion trigger and frame sync), SCK up to 20MHz, and SDO outputting straight binary (unipolar) or two's complement (bipolar) data. Automatic nap mode reduces current to 170µA between conversions without software intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across –40°C to +85°C. |
| Sample Rate | 175ksps - supports real-time acquisition of signals up to 1.25MHz full-power bandwidth. |
| INL | ±3LSB max - ensures high DC accuracy for precision sensor measurement and calibration-critical systems. |
| SNR | 83.7dB at 1kHz - enables >13.6 effective number of bits (ENOB) for high-fidelity signal digitization. |
| Supply Current | 750µA at 175ksps, 300µA at 50ksps - allows battery operation in portable instrumentation and remote sensors. |
| Reference | Internal 1.25V ±20ppm/°C, or external 3V via REFCOMP - provides flexibility for drift-sensitive applications. |
| Input Range | 0V–2.5V unipolar or ±1.25V bipolar - accommodates both ground-referenced and floating-signal sources. |
Pinout & Package
Housed in a 16-pin narrow plastic SSOP package (GN), the LTC1867LIGN#PBF features analog and digital power/ground shared on VDD (Pin 16) and GND (Pin 15), eight configurable analog input terminals (CH0–CH7/COM, Pins 1–8), dedicated reference pins (VREF at Pin 10, REFCOMP at Pin 9), and SPI-compatible digital I/O (SDI, SDO, SCK, CS/CONV at Pins 14–11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7/COM (Pins 1–8) | Analog input multiplexer channels | Supports 8 single-ended, 4 differential, or mixed-mode configurations; CH7/COM serves as common input or independent channel based on COM bit. |
| VREF (Pin 10) | 1.25V reference output / external reference buffer input | Internal bandgap reference accessible for external buffering; series 3kΩ resistor enables overdrive with external 1.25V source. |
| REFCOMP (Pin 9) | 2.5V reference buffer output | Internally amplified 2× version of VREF; requires 10µF + 0.1µF bypass for optimal noise performance. |
| CS/CONV (Pin 11) | Conversion start / serial frame enable | Rising edge initiates conversion; falling edge enables serial data output on subsequent SCK edges. |
| SCK (Pin 12) | Serial clock input | Synchronizes 16-bit data shift-in (configuration) and shift-out (result); supports up to 20MHz clock rate. |
| SDO (Pin 13) | Digital data output | Outputs conversion result in straight binary (unipolar) or two's complement (bipolar) format; Hi-Z when CS/CONV high. |
| SDI (Pin 14) | Digital data input | Accepts 7-bit configuration word defining channel, input mode, polarity, and sleep state before each conversion. |
| GND (Pin 15) | Analog and digital ground | Single-point return for all analog and digital currents; must be low-impedance and decoupled near VDD. |
| VDD (Pin 16) | 2.7V–3.6V supply | Power source for analog core, reference, and digital interface; requires 10µF + 0.1µF local bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Enables rejection of common-mode noise in motor control feedback or industrial transducer interfaces. |
| Automatic nap mode | Reduces quiescent current to 170µA between conversions without firmware overhead or external control. |
| AEC-Q100 qualified (–40°C to +85°C) | Validated for automotive body electronics, battery monitoring, and ADAS sensor front-ends requiring extended temperature reliability. |
| Configurable input multiplexer | Allows dynamic reconfiguration of channel count, input type, and polarity via 7-bit serial command-no hardware change needed. |
| On-chip 1.25V reference with external override | Eliminates need for external reference IC while permitting higher-accuracy external sources for metrology-grade applications. |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring pressure, temperature, and flow sensors in PLC I/O modules with multi-channel scanning. IC Role / Device Role / Timing Role: 16-bit ADC performing synchronized 175ksps sampling across 8 channels with ±3LSB INL for closed-loop control fidelity. Use Value: Eliminates external reference and multiplexer ICs, reducing BOM count and layout area while maintaining traceable calibration accuracy. | Use Scenario: Digitizing vibration signatures from accelerometers in predictive maintenance edge nodes. IC Role / Device Role / Timing Role: High-SNR (83.7dB) SAR converter capturing transient events with minimal aliasing up to 1.25MHz bandwidth. Use Value: Enables FFT-based spectral analysis directly on MCU without oversampling or external decimation filters. |
| Battery-Operated Systems | Automotive Sensor Interface |
Use Scenario: Portable gas analyzers using electrochemical sensors requiring low-drift, low-power analog front-end. IC Role / Device Role / Timing Role: Micropower ADC drawing only 300µA at 50ksps with automatic nap/sleep modes for extended runtime. Use Value: Extends battery life beyond 12 months on coin-cell power while preserving 16-bit resolution for ppm-level detection thresholds. | Use Scenario: Front-end for cabin air quality sensors (CO₂, VOC) in automotive HVAC control units. IC Role / Device Role / Timing Role: AEC-Q100 qualified ADC interfacing with differential NDIR detectors under harsh thermal cycling conditions. Use Value: Meets automotive reliability requirements without derating, enabling single-source qualification across Tier-1 suppliers. |
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 |
|---|---|---|---|
| ADS8688IPW | 8-channel, 16-bit, 500ksps; integrated programmable gain amplifier (PGA); SPI interface; 2.7V–5.5V supply | Higher sample rate and built-in PGA simplify sensor signal conditioning but increase power (3.5mA vs 0.75mA) | Select when amplifying low-level mV-range sensor outputs directly-avoid if system already includes precision op-amps and prioritizes ultra-low power. |
| MAX11131ETL+ | 8-channel, 16-bit, 250ksps; internal 4.096V reference; SPI; 2.7V–3.6V supply; no differential input support | Higher reference voltage improves noise immunity but lacks true differential inputs and AEC-Q100 qualification | Select for cost-sensitive industrial DAQ where common-mode noise is minimal and automotive compliance is not required. |
Compared with ADS8688IPW and MAX11131ETL+, the LTC1867LIGN#PBF delivers superior power efficiency (750µA vs >3mA), true differential input capability for noise rejection, and automotive qualification-making it optimal for space-constrained, battery-powered, or safety-critical embedded systems where precision and reliability are non-negotiable.
Availability
LTC1867LIGN#PBF is available at Aetrix Electronics and suitable for industrial process control, battery-operated instrumentation, and automotive sensor interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC1867LIGN#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1867LIGN#PBF belongs to the LTC® micropower SAR ADC product line, designed specifically for precision, low-power, multi-channel data acquisition in space- and energy-constrained environments-from portable medical devices to automotive subsystems.
FAQ
What is the operating temperature range of the LTC1867LIGN#PBF?
The LTC1867LIGN#PBF is specified for operation from –40°C to +85°C and is AEC-Q100 qualified for automotive applications. This extended industrial temperature range ensures reliable performance in engine bay sensors, industrial controllers, and outdoor instrumentation where ambient conditions vary widely. The part maintains its ±3LSB INL and 16-bit no-missing-codes guarantee across this full range.
Does the LTC1867LIGN#PBF require an external reference?
No-the LTC1867LIGN#PBF includes a factory-trimmed 1.25V internal reference with ±20ppm/°C tempco, accessible at VREF (Pin 10). It also supports external reference injection via REFCOMP (Pin 9) for improved accuracy and drift performance. When using the internal reference, no external components are required beyond standard 2.2µF + 0.1µF bypassing at VREF.
How does the LTC1867LIGN#PBF handle differential versus single-ended inputs?
The LTC1867LIGN#PBF supports both configurations via its 7-bit control word. In differential mode, pairs like CH0/CH1 or CH7/COM serve as true differential inputs with common-mode rejection; in single-ended mode, each channel references GND. The CH7/COM pin functions as either CH7 or a shared negative input depending on the COM bit-enabling flexible routing without external switches.
What power-saving modes does the LTC1867LIGN#PBF support?
The LTC1867LIGN#PBF offers three low-power states: active (750µA at 175ksps), automatic nap mode (170µA between conversions with no software action), and explicit sleep mode (0.2µA). Sleep mode is activated by setting the SLP bit in the configuration word and exited with an 80ms wake-up delay. These modes make the LTC1867LIGN#PBF ideal for duty-cycled sensor nodes and energy-harvesting systems.
Is the LTC1867LIGN#PBF pin-compatible with other members of the LTC1863L/LTC1867L family?
Yes-the LTC1867LIGN#PBF is pin-compatible with the LTC1863L (12-bit), LTC1867L (16-bit), and LTC1867LA (enhanced AC specs) variants in the same 16-pin SSOP package. This allows direct substitution during design iteration or performance tiering without PCB revision, provided the application can accommodate differences in resolution, INL (±1LSB for LTC1863L vs ±3LSB for LTC1867L), and dynamic specifications.
LTC1867LIGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- Input Type:
- Differential, 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, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867LIGN#PBF FAQ
1.How can I place an order for LTC1867LIGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LIGN#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 LTC1867LIGN#PBF reliable?
The price and inventory of LTC1867LIGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LIGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1867LIGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LIGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LIGN#PBF?
LTC1867LIGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LIGN#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 LTC1867LIGN#PBF?
For technical support, including LTC1867LIGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LIGN#PBF requirements.
6.How does Aetrix verify that LTC1867LIGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LIGN#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 LTC1867LIGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1867LIGN#PBF?
All LTC1867LIGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LIGN#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 LTC1867LIGN#PBF part is unused and in its original packaging.
Return procedure for LTC1867LIGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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