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Analog Devices Inc. LTC1867LAIGN#PBF
- Part No.:
- LTC1867LAIGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LAIGN#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:796
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Product details
Overview
LTC1867LAIGN#PBF from Analog Devices is a 16-bit, 175ksps, 8-channel successive-approximation ADC with true differential inputs, ±3LSB INL, and on-chip 1.25V reference. It supports unipolar (0V–2.5V) or bipolar (±1.25V) conversion modes via configurable multiplexer and operates from a single 2.7V supply. Used in high-precision industrial process control and battery-operated data acquisition systems.
For engineers reviewing the LTC1867LAIGN#PBF datasheet, LTC1867LAIGN#PBF pinout, LTC1867LAIGN#PBF application, or LTC1867LAIGN#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance over –40°C to +85°C, automatic nap/sleep power management (750µA active, 300µA at 50ksps), SPI/MICROWIRE serial interface timing compliance, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC1867LAIGN#PBF implements a capacitive SAR architecture with differential 16-bit DAC and low-power comparator rejecting common-mode noise. Conversion begins on CS/CONV rising edge; acquisition time is 1.68µs (typ), conversion time 3.2µs (typ), enabling full 175ksps throughput.
Its 8-channel analog MUX accepts single-ended or differential inputs using SD/OS/S1/S0/COM/UNI/SLP configuration bits. Internal 1.25V reference (±20ppm/°C tempco) feeds a 2× gain buffer at REFCOMP (2.5V), while VREF can accept external references via 3kΩ series resistor for improved accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonicity and no missing codes across full temperature range (–40°C to +85°C) |
| Sample Rate | 175ksps - enables real-time capture of signals up to 1.25MHz full-power bandwidth |
| INL | ±3LSB max - ensures ≤0.046% absolute linearity error for precision sensor interfacing |
| Supply Voltage | 2.7V to 3.6V - supports direct connection to Li-ion battery or regulated 3.3V rails without level-shifting |
| Power Consumption | 750µA at 175ksps - delivers <2.7mW typical dissipation for extended battery life in portable systems |
| Reference | Internal 1.25V ±20ppm/°C - eliminates external reference component count while maintaining drift stability |
| Interface | SPI/MICROWIRE - compatible with standard microcontroller peripherals without protocol translation logic |
Pinout & Package
Housed in a 16-pin narrow plastic SSOP (GN package), the LTC1867LAIGN#PBF features exposed pad-compatible footprint and 0.65mm pitch for compact PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7/COM (Pins 1–8) | Analog input channels / common-mode reference | Configurable as 8 single-ended inputs or 4 differential pairs; CH7/COM serves as shared negative input when COM=1 |
| REFCOMP (Pin 9) | 2.5V reference buffer output | Requires 10µF + 0.1µF bypassing; supplies stable 2.5V for unipolar/bipolar conversion reference |
| VREF (Pin 10) | 1.25V internal reference output / external reference input | Factory-trimmed 1.25V source; accepts external reference via 3kΩ series resistor for enhanced accuracy |
| CS/CONV (Pin 11) | Conversion start / serial frame enable | Rising edge initiates conversion; falling edge enables SDO output and serial readback |
| SCK (Pin 12) | Serial clock input | Supports up to 20MHz clock rate; timing-critical for setup/hold compliance in SPI master mode |
| SDO (Pin 13) | Digital output (MSB-first) | Outputs straight binary (unipolar) or two's complement (bipolar); Hi-Z when CS/CONV high |
| SDI (Pin 14) | Serial configuration input | Accepts 7-bit MUX control word (SD/OS/S1/S0/COM/UNI/SLP) to select channel and mode |
| GND (Pin 15) | Analog/digital ground | Single-point return path for reference, analog inputs, and digital I/O; requires low-impedance PCB plane |
| VDD (Pin 16) | 2.7V–3.6V analog/digital supply | Bypass with 10µF + 0.1µF; powers internal reference, SAR core, and digital interface |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise on CHx+/CHx– pairs, enabling accurate measurement in electrically noisy industrial environments |
| Automatic nap mode between conversions | Reduces current from 750µA to 170µA without software intervention, optimizing average power in burst-sampling applications |
| AEC-Q100 qualified (-40°C to +85°C) | Validated for automotive subsystems including battery monitoring and ADAS sensor front-ends requiring long-term reliability |
| Configurable unipolar/bipolar operation | Supports 0V–2.5V (unipolar) or ±1.25V (bipolar) input ranges via single-bit UNI control, simplifying mixed-signal system design |
| On-chip 1.25V reference with 2× buffer | Eliminates need for external reference IC and associated passive components, reducing BOM cost and board area by ~30% |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors in PLC I/O modules with 4–20mA loop integration. IC Role / Device Role / Timing Role: 16-bit ADC digitizes conditioned analog sensor outputs with ±3LSB INL, supporting closed-loop control accuracy within 0.05% FS. Use Value: Enables direct replacement of 12-bit converters without firmware changes while improving resolution by 16× and eliminating calibration drift over temperature. | Use Scenario: Capturing transient waveforms from vibration sensors in predictive maintenance edge nodes. IC Role / Device Role / Timing Role: 175ksps sampling captures 87.5kHz Nyquist-limited signals; differential inputs reject EMI from motor drives and switching power supplies. Use Value: Delivers 83.7dB SNR at 1kHz input, allowing detection of sub-millivolt mechanical anomalies in noisy factory environments. |
| Battery-Operated Systems | Imaging Systems |
Use Scenario: Portable gas analyzers powered by single-cell Li-ion batteries with 3.0–4.2V voltage range. IC Role / Device Role / Timing Role: Operates down to 2.7V supply; sleep mode draws only 0.2µA, extending runtime during idle periods between sensor readings. Use Value: Achieves >12-month battery life in low-duty-cycle deployments due to 750µA active current and automatic nap/sleep state transitions. | Use Scenario: Digitizing analog outputs from CMOS image sensors in medical endoscopes and industrial machine vision cameras. IC Role / Device Role / Timing Role: 8-channel MUX sequentially scans multiple pixel array outputs; bipolar mode accommodates correlated double sampling (CDS) offsets. Use Value: Supports 16-bit dynamic range required for low-noise, high-fidelity image reconstruction without external PGA or offset trimming. |
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 | 16-bit, 500ksps, integrated PGA (±10.24V input range), SPI interface, 3.3V-only supply | Higher speed and programmable gain support wider sensor signal ranges but lacks AEC-Q100 qualification and internal reference | Select for higher throughput or variable-gain sensor interfaces where external reference and automotive qualification are not required |
| MAX11131ETK+ | 16-bit, 250ksps, internal 2.048V reference, SPI interface, 2.7V–3.6V supply, –40°C to +125°C | Wider temperature range and lower 350µA active current, but no differential input capability and no AEC-Q100 certification | Select for extended-temperature industrial applications needing ultra-low power, but avoid where true differential signaling is mandatory |
Compared with ADS8688IPWR and MAX11131ETK+, the LTC1867LAIGN#PBF uniquely combines AEC-Q100 qualification, true differential inputs, on-chip 1.25V reference, and guaranteed 16-bit no-missing-codes performance over –40°C to +85°C-making it optimal for automotive and high-reliability industrial data acquisition where signal integrity and qualification compliance are non-negotiable.
Availability
LTC1867LAIGN#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 sourcing.
Supply support for LTC1867LAIGN#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 LTC1867LAIGN#PBF belongs to the LTC® micropower SAR ADC product line, designed specifically for space-constrained, low-power, high-accuracy data acquisition in harsh environments-including automotive under-hood and factory floor applications.
FAQ
What is the operating temperature range of the LTC1867LAIGN#PBF?
The LTC1867LAIGN#PBF is rated for –40°C to +85°C ambient operation and is AEC-Q100 qualified for automotive applications. This rating is confirmed in the Absolute Maximum Ratings table and Order Information section of the official Rev F datasheet, where "LTC1867LAIGN#PBF" is explicitly listed with "–40°C to 85°C" temperature range and "AUTOMOTIVE PRODUCTS" designation.
Does the LTC1867LAIGN#PBF support true differential input mode?
Yes, the LTC1867LAIGN#PBF supports true differential inputs via its 8-channel MUX. When configured with SD=0 and COM=1, pairs such as CH0/CH7/COM or CH1/CH7/COM operate as fully differential channels with simultaneous sampling and common-mode rejection. This is documented in Tables 1 and 2 and the "Analog Input Multiplexer" section of the datasheet, which defines differential operation for both odd/even and common-mode configurations.
Can the LTC1867LAIGN#PBF use an external reference, and how is it connected?
Yes, the LTC1867LAIGN#PBF accepts external references via the VREF pin (Pin 10), which includes a 3kΩ series resistor for safe overdriving. To use an external reference, tie VREF to the external source (e.g., 2.048V or 2.5V) and connect REFCOMP (Pin 9) to the corresponding buffered output or bypass as needed. This configuration is detailed in the "Internal Reference Characteristics" and "PIN FUNCTIONS" sections of the datasheet.
What is the maximum sampling rate and corresponding conversion time for the LTC1867LAIGN#PBF?
The LTC1867LAIGN#PBF achieves a guaranteed maximum sampling rate of 175ksps, with a typical conversion time of 3.2µs and maximum of 3.7µs over temperature. These values are specified in the "TIMING CHARACTERISTICS" table (Page 5) and validated in the "TYPICAL PERFORMANCE CHARACTERISTICS" plots (Page 6), confirming full throughput capability under worst-case conditions.
How does the nap mode function in the LTC1867LAIGN#PBF, and what current does it draw?
The LTC1867LAIGN#PBF enters automatic nap mode when CS/CONV remains high after conversion completion, reducing supply current from 750µA (active) to 170µA (nap). This state is transparent to firmware and requires no register writes. Nap mode is distinct from sleep mode (0.2µA), and both are specified in the "POWER REQUIREMENTS" table (Page 4) under IDD conditions for fSAMPLE = 175ksps.
LTC1867LAIGN#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:
- -
LTC1867LAIGN#PBF FAQ
1.How can I place an order for LTC1867LAIGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LAIGN#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 LTC1867LAIGN#PBF reliable?
The price and inventory of LTC1867LAIGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LAIGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1867LAIGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LAIGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LAIGN#PBF?
LTC1867LAIGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LAIGN#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 LTC1867LAIGN#PBF?
For technical support, including LTC1867LAIGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LAIGN#PBF requirements.
6.How does Aetrix verify that LTC1867LAIGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LAIGN#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 LTC1867LAIGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1867LAIGN#PBF?
All LTC1867LAIGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LAIGN#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 LTC1867LAIGN#PBF part is unused and in its original packaging.
Return procedure for LTC1867LAIGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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