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Analog Devices Inc. LTC1867LAIGN#WTRPBF
- Part No.:
- LTC1867LAIGN#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LAIGN#WTRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,143
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Product details
Overview
LTC1867LAIGN#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 in unipolar (0V–2.5V) or bipolar (±1.25V) modes, and SPI/MICROWIRE serial interface - used in automotive-grade data acquisition systems requiring high DC accuracy and low power.
For engineers reviewing the LTC1867LAIGN#WTRPBF datasheet, LTC1867LAIGN#WTRPBF pinout, LTC1867LAIGN#WTRPBF application, or LTC1867LAIGN#WTRPBF equivalent, key selection criteria include guaranteed ±3LSB INL over temperature, AEC-Q100 qualification, automatic nap/sleep mode operation, and compatibility with internal or external reference configurations.
Technical Context
The LTC1867LAIGN#WTRPBF implements a capacitive SAR architecture with differential input sampling, 16-bit no-missing-codes performance, and on-chip 1.25V bandgap reference trimmed to ±0.8% initial accuracy and ±20ppm/°C tempco. Its 8-channel MUX supports dynamic reconfiguration via 7-bit serial command word including SD (single/diff), OS (odd/sign), S1/S0 (address), COM (CH7/COM mode), UNI (unipolar/bipolar), and SLP (sleep enable).
Digital timing is synchronized by CS/CONV rising edge for conversion start and SCK for serial I/O, with guaranteed tCONV ≤ 3.7µs and tACQ ≤ 2.01µs. The device enters automatic nap mode when CS/CONV remains high post-conversion, reducing supply current from 750µA to 170µA, and supports full sleep mode (2µA) with 80ms wake-up time for battery-sensitive applications.
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 - maximum throughput with full DC and AC specifications met, enabling real-time sensor monitoring. |
| INL | ±3LSB max - ensures high absolute accuracy for precision industrial and automotive measurements without calibration. |
| Supply Current | 750µA at 175ksps - enables continuous operation from coin-cell or energy-harvesting sources. |
| Reference | Internal 1.25V ±0.8%, ±20ppm/°C - eliminates need for external reference unless higher stability required. |
| Input Range | ±1.25V differential or 0V–2.5V single-ended - supports direct connection to transducer bridges and voltage outputs. |
| Package | 16-pin narrow SSOP - compact footprint suitable for space-constrained automotive ECUs and portable instrumentation. |
Pinout & Package
Housed in a 16-lead narrow plastic SSOP package (GN), the LTC1867LAIGN#WTRPBF features dual-purpose pins optimized for low-noise analog acquisition and robust serial communication.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7/COM (Pins 1–8) | Analog Input / Common Terminal | Configurable as eight single-ended channels or four differential pairs; CH7/COM serves as common negative input when COM bit = 1. |
| REFCOMP (Pin 9) | Reference Buffer Output | Provides 2.5V buffered reference (2× VREF); requires 10µF + 0.1µF bypass for optimal noise rejection. |
| VREF (Pin 10) | 1.25V Reference Output/Input | Factory-trimmed internal reference output; also accepts external reference via 3kΩ series resistor for improved drift/accuracy. |
| CS/CONV (Pin 11) | Conversion Start / Serial Frame | Rising edge initiates conversion; low level enables serial port and frames SPI data transfer. |
| SCK (Pin 12) | Serial Clock Input | Synchronizes 16-bit data shift-in (config word) and shift-out (conversion result) at up to 20MHz. |
| SDO (Pin 13) | Serial Data Output | Outputs straight binary (unipolar) or two's complement (bipolar) format; Hi-Z when CS/CONV high. |
| SDI (Pin 14) | Serial Data Input | Accepts 7-bit configuration word defining channel, polarity, differential/single mode, and sleep control. |
| GND (Pin 15) | Analog/Digital Ground | Single ground plane required; separation not needed due to internal isolation design. |
| VDD (Pin 16) | Power Supply | 2.7V–3.6V operation; bypass with 10µF + 0.1µF capacitor essential for stable reference and low noise. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for –40°C to +85°C automotive operation with controlled manufacturing and reliability reporting. |
| True Differential Inputs | Simultaneous sampling of + and – inputs rejects common-mode noise in motor control and sensor bridge applications. |
| Automatic Nap Mode | Reduces current from 750µA to 170µA between conversions without software intervention - extends battery life. |
| Configurable Input MUX | Single 7-bit serial command selects channel, polarity, differential/single mode, and sleep state - simplifies firmware. |
| On-Chip Reference | 1.25V ±0.8% initial accuracy with ±20ppm/°C drift eliminates BOM cost and layout area for external reference. |
Applications
| Automotive Battery Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Real-time voltage and temperature monitoring of 12V lead-acid and Li-ion battery packs in ADAS ECUs and body controllers. IC Role / Device Role / Timing Role: 16-bit ADC digitizes differential cell voltages and thermistor outputs with ±3LSB INL to detect early degradation or thermal runaway. Use Value: Enables precise SoH estimation and predictive maintenance without external calibration, meeting ISO 26262 ASIL-B functional safety requirements. | Use Scenario: High-accuracy analog signal acquisition from pressure, flow, and temperature sensors in PLC I/O modules. IC Role / Device Role / Timing Role: 8-channel MUX scans multiple 4–20mA loop receivers or RTD bridges using unipolar/bipolar modes and internal reference. Use Value: Delivers 16-bit no-missing-codes linearity over –40°C to +85°C, eliminating field recalibration in harsh factory environments. |
| Multiplexed Sensor Hub | Portable Medical Instrumentation |
Use Scenario: Compact wearable or handheld devices acquiring ECG, EMG, and bioimpedance signals from multiple electrodes. IC Role / Device Role / Timing Role: True differential inputs reject motion artifact and 50/60Hz interference; SPI interface enables low-pin-count MCU integration. Use Value: 83.7dB SNR and –92.3dB THD support clinical-grade signal fidelity while 750µA active current extends operating time on rechargeable batteries. | Use Scenario: Portable blood glucose meters and pulse oximeters requiring low-power, high-accuracy analog front-end. IC Role / Device Role / Timing Role: Digitizes photodiode current and thermistor voltage using internal 1.25V reference and automatic nap mode between readings. Use Value: Eliminates external reference and reduces system power by >40% vs discrete solutions - critical for CE/FDA-certified Class II devices. |
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 |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit, 500ksps; internal 4.096V reference; SPI interface; 24-pin TSSOP package. | Higher speed and resolution but larger footprint and 2.5× higher supply current (1.8mA). | Select for systems needing >175ksps throughput and wider input range (±10.24V), accepting higher power and PCB area. |
| MAX11131ETK+ | 8-channel, 16-bit, 250ksps; internal 2.048V reference; SPI interface; 20-pin TQFN package; no AEC-Q100 rating. | Higher sample rate and smaller package but lacks automotive qualification and has ±4LSB INL (vs ±3LSB). | Select for commercial portable instruments where size and speed outweigh automotive compliance and ultimate linearity. |
Compared with ADS8688IPWR and MAX11131ETK+, the LTC1867LAIGN#WTRPBF delivers superior DC accuracy (±3LSB INL) and lowest active power (750µA) in an AEC-Q100-qualified 16-pin SSOP, making it optimal for space- and power-constrained automotive and industrial sensing nodes.
Availability
LTC1867LAIGN#WTRPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial process control, portable medical instrumentation, and multiplexed sensor hub applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LTC1867LAIGN#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1867L family was designed specifically for micropower, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing low supply current, integrated reference, and flexible input configuration without sacrificing DC linearity.
FAQ
What is the operating temperature range for the LTC1867LAIGN#WTRPBF?
The LTC1867LAIGN#WTRPBF is rated for –40°C to +85°C and qualified to AEC-Q100 Grade 3 standards, making it suitable for under-hood automotive applications and industrial environments with wide ambient variations. This range is explicitly confirmed in the "ORDER INFORMATION" table for parts marked "LTC1867LAIGN#WTRPBF" and "–40°C to 85°C".
Does the LTC1867LAIGN#WTRPBF support both unipolar and bipolar input modes?
Yes, the LTC1867LAIGN#WTRPBF supports both unipolar (0V to 2.5V) and bipolar (±1.25V) conversion modes, selected via the UNI bit in the 7-bit serial configuration word. In bipolar mode, the device uses true differential sampling with ±1.25V full-scale range referenced to VIN– = 1.25V, as specified in the "ANALOG INPUT" section.
Can the LTC1867LAIGN#WTRPBF use an external reference instead of the internal one?
Yes, the LTC1867LAIGN#WTRPBF can accept an external reference applied to the VREF pin, enabled by a 3kΩ internal series resistor that allows overdriving the internal 1.25V reference. When using an external reference, REFCOMP must be tied to the external reference source, and VREF grounded - as detailed in the "INTERNAL REFERENCE CHARACTERISTICS" and "PIN FUNCTIONS" sections.
What is the minimum acquisition time required for accurate sampling on the LTC1867LAIGN#WTRPBF?
The LTC1867LAIGN#WTRPBF requires a minimum acquisition time of 2.01µs (at TA = –40°C to +85°C) to fully charge the internal sample-and-hold capacitor and achieve specified 16-bit accuracy. This value is guaranteed across temperature and appears in the "ANALOG INPUT" table under parameter "tACQ" for the LTC1867LA grade.
How does the automatic nap mode function on the LTC1867LAIGN#WTRPBF?
The LTC1867LAIGN#WTRPBF automatically enters nap mode (170µA typical) when CS/CONV remains high after conversion completion, reducing current from 750µA without firmware overhead. It exits nap mode on the next CS/CONV rising edge. Full sleep mode (2µA) requires explicit SLP bit assertion in the configuration word, with 80ms wake-up time.
LTC1867LAIGN#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:
- -
LTC1867LAIGN#WTRPBF FAQ
1.How can I place an order for LTC1867LAIGN#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LAIGN#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 LTC1867LAIGN#WTRPBF reliable?
The price and inventory of LTC1867LAIGN#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LAIGN#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC1867LAIGN#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LAIGN#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LAIGN#WTRPBF?
LTC1867LAIGN#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LAIGN#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 LTC1867LAIGN#WTRPBF?
For technical support, including LTC1867LAIGN#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LAIGN#WTRPBF requirements.
6.How does Aetrix verify that LTC1867LAIGN#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LAIGN#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 LTC1867LAIGN#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC1867LAIGN#WTRPBF?
All LTC1867LAIGN#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LAIGN#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 LTC1867LAIGN#WTRPBF part is unused and in its original packaging.
Return procedure for LTC1867LAIGN#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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