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Analog Devices Inc. LTC1867LAIGN#WPBF
- Part No.:
- LTC1867LAIGN#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LAIGN#WPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,693
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Product details
Overview
LTC1867LAIGN#WPBF 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. It delivers ±3LSB INL, 16-bit no missing codes over temperature, and operates from 2.7V to 3.6V supply. It is AEC-Q100 qualified for automotive applications and housed in a 16-pin narrow SSOP package.
For engineers reviewing the LTC1867LAIGN#WPBF datasheet, LTC1867LAIGN#WPBF pinout, LTC1867LAIGN#WPBF application, or LTC1867LAIGN#WPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade performance specs, and real-world application mappings - all derived from the official Rev F datasheet and Analog Devices' automotive product documentation.
Technical Context
The LTC1867LAIGN#WPBF implements a capacitive SAR architecture with differential input sampling, internal 1.25V bandgap reference (±20ppm/°C tempco), and configurable 8-channel MUX enabling simultaneous unipolar (0V–2.5V) or bipolar (±1.25V) conversion modes. Its acquisition time is 1.68µs (typ) and conversion time is 3.2µs (typ), enabling guaranteed 175ksps throughput.
It features automatic nap mode (170µA typ between conversions) and sleep mode (0.2µA typ), with dual-function CS/CONV pin initiating conversion and framing serial data. The SDO output supports straight binary (unipolar) or two's complement (bipolar) format, synchronized by SCK up to 20MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across full temperature range (–40°C to +85°C). |
| Sample Rate | 175ksps - maximum sustained conversion rate with guaranteed timing (tCONV ≤ 3.7µs, tACQ ≤ 2.01µs). |
| INL Error | ±3LSB max - ensures high DC accuracy for precision sensor measurement and closed-loop control feedback. |
| Supply Current | 750µA at 175ksps - enables battery-operated systems with <2.7mW power dissipation (VDD = 2.7V). |
| Reference | Internal 1.25V ±0.5% (25°C), ±20ppm/°C - eliminates external reference component while maintaining drift stability for automotive environments. |
| Input Configuration | 8-channel MUX with selectable single-ended/differential and unipolar/bipolar modes - supports flexible signal routing without external switching hardware. |
| Operating Temp | –40°C to +85°C - AEC-Q100 qualified for under-hood and chassis-mounted automotive electronics. |
Pinout & Package
Housed in a 16-lead narrow plastic SSOP (GN package), the LTC1867LAIGN#WPBF uses a standard 0.15mm pitch, 5.3mm × 5.3mm body size with exposed pad not present. Pin 1 is CH0 (top-left corner, dot-marked); pin 16 is VDD (bottom-right). All analog and digital grounds share Pin 15 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH6 (Pins 1–7) | Analog Input Channel | Single-ended or differential "+" inputs; configurable via SDI command word (e.g., SD=0 selects single-ended, SD=1 selects differential). |
| CH7/COM (Pin 8) | Common Input / Channel 7 | Configurable as eighth channel or common "–" input for differential pairs when COM bit = 1 in configuration word. |
| REFCOMP (Pin 9) | 2.5V Reference Buffer Output | Provides buffered 2× gain of VREF (1.25V → 2.5V); requires 10µF + 0.1µF bypass for low-noise operation. |
| VREF (Pin 10) | 1.25V Reference Output / External Ref Input | Factory-trimmed internal reference; can be overdriven by external source for improved accuracy or drift performance. |
| CS/CONV (Pin 11) | Conversion Start / Serial Frame Enable | Rising edge initiates conversion; falling edge enables SDO output and serial data transfer. |
| SCK (Pin 12) | Serial Clock Input | Synchronizes 16-bit data shift-out on SDO and 7-bit configuration word shift-in on SDI (up to 20MHz). |
| SDO (Pin 13) | Digital Data Output | Outputs conversion result: straight binary (unipolar) or two's complement (bipolar); Hi-Z when CS/CONV high. |
| SDI (Pin 14) | Digital Data Input | Accepts 7-bit configuration word defining channel, polarity, differential/single-ended, and sleep mode. |
| GND (Pin 15) | Analog & Digital Ground | Single-point return for all analog and digital circuitry; must be low-impedance and decoupled near VDD. |
| VDD (Pin 16) | Power Supply | 2.7V–3.6V supply powering analog core, reference, and digital interface; requires 10µF + 0.1µF bypass. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive use (Grade I: –40°C to +85°C), including HTOL, TCT, and ESD testing per JESD47. |
| True Differential Inputs | Simultaneous sampling of "+" and "–" inputs rejects common-mode noise up to 112dB (100kHz), critical for motor current sensing. |
| Automatic Nap Mode | Reduces current from 750µA to 170µA between conversions without software intervention - extends battery life in intermittent-sampling systems. |
| On-Chip Reference w/ Overdrive Capability | 1.25V internal reference with 3kΩ series resistor allows seamless replacement with higher-accuracy external sources (e.g., LT6655). |
| Flexible Input Multiplexing | Supports 8 single-ended, 4 differential, or mixed configurations (e.g., CH0–CH1 diff + CH2–CH3 diff + CH4–CH5 diff + CH6–CH7/COM diff) via 7-bit SDI word. |
Applications
| Automotive Battery Monitoring | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Real-time voltage and temperature monitoring of 12V/48V vehicle battery packs with cell balancing feedback. IC Role / Device Role / Timing Role: 16-bit ADC digitizes differential voltage across shunt resistors and thermistor bridges; 175ksps sample rate captures transient load events. Use Value: ±3LSB INL and AEC-Q100 qualification ensure reliable SoC estimation and fault detection in harsh automotive environments. |
Use Scenario: High-precision analog input stage in modular programmable logic controllers for factory automation. IC Role / Device Role / Timing Role: Configurable 8-channel MUX acquires signals from pressure, flow, and position sensors; SPI interface simplifies FPGA/CPU integration. Use Value: Internal 1.25V reference eliminates calibration drift over temperature, reducing field maintenance and improving long-term measurement repeatability. |
| Portable Medical Instrumentation | Energy Metering Front-End |
|
Use Scenario: Low-power ECG and bio-potential acquisition in handheld diagnostic devices with multi-day battery life. IC Role / Device Role / Timing Role: True differential inputs reject 50/60Hz mains interference; nap/sleep modes minimize idle current during inter-beat intervals. Use Value: 750µA active current and 0.2µA sleep current enable >100 hours of continuous operation on a single CR2032 coin cell. |
Use Scenario: High-accuracy voltage and current sampling in Class 0.2 smart electricity meters compliant with IEC 62053-22. IC Role / Device Role / Timing Role: Simultaneous sampling of voltage and current channels using differential inputs referenced to REFCOMP (2.5V). Use Value: 83.7dB SNR and ±3LSB INL meet metrology-grade linearity requirements for revenue-grade energy calculation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit, multiplexed, low-power ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit, 500ksps SAR ADC with integrated PGA and 4.096V reference; requires external power supply sequencing; no AEC-Q100 grade. | Better speed and on-chip gain, but lacks automotive qualification and consumes 2.5mA at full rate - unsuitable for battery-powered automotive nodes. | Select only for non-automotive industrial systems requiring >175ksps or programmable gain; verify PCB layout for higher-speed digital interface. |
| MAX11131ETK+ | 16-bit, 250ksps SAR ADC with internal 2.048V reference; 10-pin µMAX package; no differential input support; only industrial temp range (–40°C to +85°C, non-AEC-Q100). | Smaller footprint and higher speed, but limited to single-ended inputs and lacks automotive reliability validation and REFCOMP buffer. | Consider for space-constrained consumer or industrial designs where differential rejection is not required and AEC-Q100 is unnecessary. |
Compared with ADS8688IPWR and MAX11131ETK+, the LTC1867LAIGN#WPBF uniquely combines AEC-Q100 qualification, true differential inputs, internal 1.25V/2.5V reference chain, and sub-1mA active current - making it the only drop-in solution for automotive battery management and chassis sensor hubs requiring both precision and functional safety readiness.
Availability
LTC1867LAIGN#WPBF is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial PLC analog input modules, portable medical instrumentation, and energy metering front-end designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1867LAIGN#WPBF 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 LTC1863L/LTC1867L family was designed specifically for micropower, high-precision data acquisition in space- and power-constrained environments - with emphasis on automotive-grade reliability, integrated reference stability, and flexible multiplexed input architectures.
FAQ
What is the operating temperature range for the LTC1867LAIGN#WPBF?
The LTC1867LAIGN#WPBF is rated for –40°C to +85°C and is AEC-Q100 qualified for automotive applications. This specification is explicitly confirmed in the "ORDER INFORMATION" table of the Rev F datasheet, where the "AIGN" suffix denotes the automotive temperature grade, and the "#WPBF" suffix indicates lead-free, automotive-compliant finish.
Does the LTC1867LAIGN#WPBF support true differential input measurements?
Yes, the LTC1867LAIGN#WPBF supports true differential inputs across all eight channels (e.g., CH0–CH1, CH2–CH3, etc.) with simultaneous sampling of both "+" and "–" inputs. This capability is documented in the "DESCRIPTION", "FEATURES", and "APPLICATIONS INFORMATION" sections, and is enabled via the SD (single/differential) and OS (odd/sign) bits in the 7-bit configuration word.
Can the internal reference of the LTC1867LAIGN#WPBF be overdriven with an external source?
Yes, the LTC1867LAIGN#WPBF allows overdriving its internal 1.25V reference through the VREF pin (Pin 10), which includes a 3kΩ series resistor for safe external connection. This is explicitly stated in the "INTERNAL REFERENCE CHARACTERISTICS" section and illustrated in Figure 4b of the datasheet, enabling improved accuracy or lower drift using precision external references like the LT6655.
What is the guaranteed maximum sampling rate for the LTC1867LAIGN#WPBF?
The LTC1867LAIGN#WPBF guarantees a maximum sampling rate of 175ksps across its full operating temperature range. This is confirmed in the "TIMING CHARACTERISTICS" table (fSAMPLE = 175kHz, l symbol indicating full-range spec) and supported by the specified conversion time (tCONV ≤ 3.7µs) and acquisition time (tACQ ≤ 2.01µs) in the same table.
How does the nap mode function in the LTC1867LAIGN#WPBF?
The LTC1867LAIGN#WPBF enters automatic nap mode when CS/CONV remains high after conversion completion, reducing supply current from 750µA (active) to 170µA (nap). This behavior is detailed in the "POWER REQUIREMENTS" table and "APPLICATIONS INFORMATION" section, and requires no software command - it is hardware-automated to extend battery life in intermittent-sampling applications.
LTC1867LAIGN#WPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -
LTC1867LAIGN#WPBF FAQ
1.How can I place an order for LTC1867LAIGN#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LAIGN#WPBF 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 LTC1867LAIGN#WPBF reliable?
The price and inventory of LTC1867LAIGN#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LAIGN#WPBF is usually 5 days.
3.What payment methods are accepted for LTC1867LAIGN#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LAIGN#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LAIGN#WPBF?
LTC1867LAIGN#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LAIGN#WPBF 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 LTC1867LAIGN#WPBF?
For technical support, including LTC1867LAIGN#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LAIGN#WPBF requirements.
6.How does Aetrix verify that LTC1867LAIGN#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LAIGN#WPBF 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 LTC1867LAIGN#WPBF meets industry standards.
7.What is the process for return or replacement of LTC1867LAIGN#WPBF?
All LTC1867LAIGN#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LAIGN#WPBF, 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 LTC1867LAIGN#WPBF part is unused and in its original packaging.
Return procedure for LTC1867LAIGN#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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