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Analog Devices Inc. LTC1867LIGN#WTRPBF
- Part No.:
- LTC1867LIGN#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LIGN#WTRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,984
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Product details
Overview
LTC1867LIGN#WTRPBF from Analog Devices is a 16-bit, 175ksps micropower successive-approximation ADC with integrated 1.25V reference, 8-channel analog multiplexer supporting true differential or single-ended inputs, and SPI/MICROWIRE serial interface - used in high-precision industrial data acquisition systems requiring low power and AEC-Q100 automotive qualification.
For engineers reviewing the LTC1867LIGN#WTRPBF datasheet, LTC1867LIGN#WTRPBF pinout, LTC1867LIGN#WTRPBF application, or LTC1867LIGN#WTRPBF equivalent, key selection factors include guaranteed 16-bit no missing codes over temperature, ±3LSB INL, 80ms SLEEP wake-up time, internal/external reference flexibility, and automotive-grade –40°C to +85°C operation in narrow SSOP.
Technical Context
The LTC1867LIGN#WTRPBF implements a capacitive SAR architecture with differential 16-bit DAC, low-power comparator rejecting common-mode noise, and automatic nap mode between conversions. Its 8-channel MUX supports dynamic reconfiguration via 7-bit serial command (SD/OS/S1/S0/COM/UNI/SLP) for mixed single-ended/differential channel assignments.
It features dual reference paths: internal 1.25V bandgap (±20ppm/°C tempco) buffered to 2.5V at REFCOMP, or external reference applied to VREF with 3kΩ series resistance. Conversion timing is factory-trimmed (3.2µs typ conversion, 1.68µs typ acquisition), enabling guaranteed 175ksps throughput with 2.7V–3.6V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across full temperature range. |
| Sample Rate | 175ksps - maximum sustained throughput with full DC and AC performance specified. |
| INL | ±3LSB max - ensures accurate end-point linearity for precision sensor digitization and closed-loop control. |
| Supply Current | 750µA at 175ksps - enables battery-operated systems with multi-day runtime on coin cells. |
| Reference | Internal 1.25V ±20ppm/°C or external - allows trade-off between simplicity (internal) and drift-critical accuracy (external). |
| Operating Temp | –40°C to +85°C - qualified per AEC-Q100 Grade 3 for under-hood automotive and industrial edge sensing. |
| Digital Interface | SPI/MICROWIRE compatible - supports standard microcontroller peripherals without protocol translation. |
Pinout & Package
Package: 16-pin narrow plastic SSOP (GN), 5.3mm × 4.4mm body, 0.65mm pitch, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH6 (Pins 1–7) | Analog Input Channel | Single-ended or differential "+" input; configurable via SD/OS/S1/S0 bits in serial command word. |
| CH7/COM (Pin 8) | Configurable Analog Terminal | Either eighth channel (COM = 0) or common-mode reference for differential pairs (COM = 1). |
| VDD (Pin 16) | Power Supply | 2.7V–3.6V analog/digital rail; requires 10µF + 0.1µF bypassing for stable reference and low-noise conversion. |
| GND (Pin 15) | Ground Reference | Common analog/digital return; must be low-impedance and star-connected to minimize noise coupling. |
| CS/CONV (Pin 11) | Conversion Trigger & Serial Frame | Rising edge initiates conversion; low level enables serial output and accepts configuration word on next SCK cycle. |
| SCK (Pin 12) | Serial Clock Input | Up to 20MHz clock synchronizes 16-bit data shift-in (config) and shift-out (result); falling-edge capture supported. |
| SDO (Pin 13) | Serial Data Output | Outputs 16-bit result: straight binary (unipolar) or two's complement (bipolar); Hi-Z when CS/CONV high. |
| SDI (Pin 14) | Serial Data Input | Accepts 7-bit configuration word (SD/OS/S1/S0/COM/UNI/SLP) to select channel, mode, and sleep state. |
| VREF (Pin 10) | Reference Output/Input | 1.25V internal reference output; also accepts external reference (via 3kΩ series resistor) for improved accuracy. |
| REFCOMP (Pin 9) | Buffered Reference Output | 2.5V buffered reference (2× VREF); requires 10µF + 0.1µF bypass for optimal noise and stability. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Inputs | Enables rejection of common-mode noise up to 112dB at 100kHz, critical for motor current sensing and isolated voltage monitoring. |
| Automatic Nap Mode | Reduces current from 750µA to 170µA between conversions without software intervention, cutting average power by >75% in burst-sampling applications. |
| On-Chip 1.25V Reference | Eliminates external reference IC and associated layout complexity while maintaining ±3LSB INL over temperature and supply variation. |
| Configurable Input Multiplexer | Supports 8 single-ended, 4 differential, or mixed configurations via serial command - simplifies PCB routing and reduces external mux IC count. |
| AEC-Q100 Automotive Qualification | Validated for automotive environments including thermal cycling, humidity, and vibration - suitable for ADAS sensor interfaces and battery management. |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring thermocouple, RTD, and strain gauge signals in PLC I/O modules with 4–20mA loop integration. IC Role / Device Role / Timing Role: Primary 16-bit digitizer for 8 analog sensor channels, performing synchronized sampling at 175ksps with bipolar ±1.25V input range. Use Value: ±3LSB INL and 83.7dB SNR ensure <0.01% measurement error in closed-loop PID control loops without calibration. |
Use Scenario: Digitizing transient waveforms from oscilloscope front-ends or ultrasonic NDT equipment. IC Role / Device Role / Timing Role: High-fidelity ADC core with 1.25MHz full-power bandwidth and 1.68µs acquisition time for accurate signal reconstruction. Use Value: 83.1dB S/(N+D) ratio and –95.1dB spurious noise enable clean FFT analysis of kHz-range signals without post-processing filtering. |
| Battery-Operated Systems | Multiplexed Sensor Networks |
Use Scenario: Portable gas analyzers or handheld multimeters powered by AA batteries or Li-ion cells. IC Role / Device Role / Timing Role: Low-power ADC subsystem entering 300µA sleep mode between readings and 170µA nap mode during idle cycles. Use Value: 750µA active current at 175ksps extends battery life to >1 year in duty-cycled environmental monitors. |
Use Scenario: Distributed temperature/humidity nodes in smart building HVAC systems using shared SPI bus. IC Role / Device Role / Timing Role: SPI-configurable 8-channel ADC sharing single microcontroller interface across multiple sensor boards. Use Value: Pin-compatible with LTC1863L allows hardware reuse across 12-bit and 16-bit variants, reducing BOM and firmware divergence. |
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 |
|---|---|---|---|
| AD7682BCPZ-RL7 | 16-bit, 250ksps, 2.5V internal reference, no integrated MUX, SPI-only interface | Requires external analog multiplexer; higher sample rate but lacks differential input flexibility and automotive qualification | Select when higher throughput is required and system already includes a precision MUX or uses only single-ended sensors. |
| LTC2315ITS8#TRMPBF | 16-bit, 1Msps, 3V supply only, no internal reference, no MUX, tiny 8-pin TSOT-23 package | Higher speed but no on-chip reference or multiplexer; not AEC-Q100 qualified; unsuitable for space-constrained automotive designs needing integrated functions | Select for compact, high-speed point-of-load monitoring where external reference and MUX are available and automotive qualification is not required. |
Compared with AD7682BCPZ-RL7 and LTC2315ITS8#TRMPBF, the LTC1867LIGN#WTRPBF uniquely integrates MUX, reference, and automotive qualification in a single SSOP package - reducing component count, board area, and qualification effort for embedded sensor systems.
Availability
LTC1867LIGN#WTRPBF 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 compliance.
Supply support for LTC1867LIGN#WTRPBF 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1867LIGN#WTRPBF belongs to the LTC® micropower precision ADC product line, designed specifically for space- and power-constrained applications demanding high resolution, low noise, and robust operation across extended temperature ranges.
FAQ
What is the guaranteed operating temperature range for LTC1867LIGN#WTRPBF?
The LTC1867LIGN#WTRPBF is rated for –40°C to +85°C and is AEC-Q100 qualified for automotive applications. This rating is confirmed in the Absolute Maximum Ratings table and Order Information section of the datasheet, with the "I" grade suffix explicitly denoting industrial/automotive temperature range.
Does LTC1867LIGN#WTRPBF support true differential input measurements?
Yes, the LTC1867LIGN#WTRPBF supports true differential inputs across all eight channels (e.g., CH0–CH1, CH2–CH3, etc.) with 112dB channel-to-channel isolation at 100kHz. The MUX configuration is controlled via the SD and OS bits in the 7-bit serial command, enabling simultaneous differential acquisition without external instrumentation amplifiers.
Can LTC1867LIGN#WTRPBF use an external reference, and how is it connected?
Yes, LTC1867LIGN#WTRPBF accepts an external reference applied to the VREF pin. An internal 3kΩ series resistor isolates the external source, allowing overdriving of the internal 1.25V reference. When using an external reference, tie VREF to the external source and connect REFCOMP to the corresponding buffered output (e.g., 2.5V or 3V) with proper bypassing.
What is the minimum acquisition time required before a valid conversion with LTC1867LIGN#WTRPBF?
The minimum acquisition time for LTC1867LIGN#WTRPBF is 2.01µs at 25°C and 1.68µs over temperature (–40°C to +85°C). This time ensures full settling of the internal sample-and-hold capacitor and is specified in the Analog Input section of the datasheet under tACQ parameter.
Is LTC1867LIGN#WTRPBF pin-compatible with other members of the LTC1863L/LTC1867L family?
Yes, LTC1867LIGN#WTRPBF is fully pin-compatible with LTC1863LIGN#WTRPBF, LTC1867LCGN#TRPBF, and all other variants in the LTC1863L/LTC1867L family. This compatibility is explicitly stated in the datasheet's DESCRIPTION section and verified in the PIN CONFIGURATION diagram and ORDER INFORMATION table.
LTC1867LIGN#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 175k
- 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#WTRPBF FAQ
1.How can I place an order for LTC1867LIGN#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LIGN#WTRPBF 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#WTRPBF reliable?
The price and inventory of LTC1867LIGN#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LIGN#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC1867LIGN#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LIGN#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LIGN#WTRPBF?
LTC1867LIGN#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LIGN#WTRPBF 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#WTRPBF?
For technical support, including LTC1867LIGN#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LIGN#WTRPBF requirements.
6.How does Aetrix verify that LTC1867LIGN#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LIGN#WTRPBF 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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC1867LIGN#WTRPBF?
All LTC1867LIGN#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LIGN#WTRPBF, 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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC1867LIGN#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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