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Analog Devices Inc. LTC1867AIGN#TRPBF
- Part No.:
- LTC1867AIGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867AIGN#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,015
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Product details
Overview
LTC1867AIGN#TRPBF from Analog Devices is a 16-bit, 8-channel, 200ksps successive approximation ADC with integrated 2.5V reference and SPI/MICROWIRE interface. It supports single-ended or differential inputs, unipolar (0–4.096V) or bipolar (±2.048V) conversion modes, and operates from a single 5V supply. Used in high-precision industrial data acquisition systems requiring low power and no missing codes.
For engineers reviewing the LTC1867AIGN#TRPBF datasheet, LTC1867AIGN#TRPBF pinout, LTC1867AIGN#TRPBF application, or LTC1867AIGN#TRPBF equivalent, key selection criteria include guaranteed ±2LSB INL over temperature, 89dB SNR with internal reference, automatic nap/sleep modes for battery operation, and AEC-Q100 qualification for automotive sensor interfaces.
Technical Context
The LTC1867AIGN#TRPBF implements a capacitive SAR architecture with factory-trimmed internal 2.5V bandgap reference and buffered 4.096V REFCOMP output. Its 8-channel analog multiplexer is configured via a 7-bit serial control word supporting dynamic reconfiguration of input pairs and COM pin assignment.
Conversion timing is internally clocked (typ. 3µs), with 1.5µs acquisition time and guaranteed 200ksps throughput. Digital interface uses CS/CONV edge-triggered start, SCK-synchronized serial readout (straight binary/unipolar or two's complement/bipolar), and Hi-Z SDO during idle - all compliant with SPI/MICROWIRE protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes with no missing codes over full temperature range. |
| INL (Integral Nonlinearity) | ±2 LSB max - ensures accurate end-point linearity critical for closed-loop control and calibration systems. |
| SNR | 89 dB typical - enables high-fidelity signal capture in imaging and precision sensor conditioning applications. |
| Sampling Rate | 200 ksps - supports real-time monitoring of fast transients in motor control and power quality analyzers. |
| Supply Current | 1.3 mA at 200 ksps; 150 µA in nap mode - reduces thermal load and extends battery life in portable instrumentation. |
| Analog Input Range | 0–4.096 V (unipolar) or ±2.048 V (bipolar) - matches standard industrial voltage/current sensor outputs without external scaling. |
| Reference | Internal 2.5 V ±15 ppm/°C tempco, buffered to 4.096 V at REFCOMP - eliminates need for external precision reference in cost-sensitive designs. |
Pinout & Package
Package: 16-pin narrow plastic SSOP (GN), 0.150" body width, 0.025" pitch - suitable for space-constrained PCB layouts in industrial and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH6 (Pins 1–7) | Analog Input Channels | Single-ended or differential "+" inputs; configurable via SD/OS/S1/S0 bits in control word. |
| CH7/COM (Pin 8) | Channel 7 or Common Reference | Configurable as eighth channel or shared "–" input for differential pairs when COM bit = 1. |
| REFCOMP (Pin 9) | 4.096 V Reference Buffer Output | Must be bypassed with 10 µF + 0.1 µF to GND; drives external circuitry or serves as precise unipolar full-scale reference. |
| VREF (Pin 10) | 2.5 V Internal Reference Output | Factory-trimmed bandgap node; series 6 kΩ resistor allows overdrive with external reference for improved accuracy. |
| CS/CONV (Pin 11) | Conversion Start / Serial Frame Enable | Rising edge initiates conversion; falling edge enables serial output; short-pulse mode supported for burst sampling. |
| SCK (Pin 12) | Serial Clock Input | Accepts up to 40 MHz clock; synchronizes 16-bit readout and configuration word loading on SDI. |
| SDO (Pin 13) | Serial Data Output | Outputs conversion result MSB-first; Hi-Z when CS/CONV high; format depends on UNI bit (straight binary/two's complement). |
| SDI (Pin 14) | Serial Data Input | Loads 7-bit configuration word (SD/OS/S1/S0/COM/UNI/SLP) to select channel, mode, and power state. |
| GND (Pin 15) | Analog/Digital Ground | Common return for analog inputs, reference, and digital I/O; requires solid ground plane per layout guidelines. |
| VDD (Pin 16) | 5 V Power Supply | Single-supply operation; bypass with 10 µF + 0.1 µF tantalum/ceramic; supports 4.75–5.25 V range. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no missing codes over –40°C to +85°C | Guaranteed monotonicity enables reliable position feedback and safety-critical measurements without code gaps. |
| Automatic nap mode between conversions | Reduces average current to 150 µA at low sample rates - ideal for intermittent sensing in IoT edge nodes. |
| Configurable 8-channel MUX with COM pin flexibility | Supports mixed single-ended/differential acquisition (e.g., CH0–CH6 SE + CH7/COM as common) without hardware change. |
| On-chip 2.5 V reference with 4.096 V buffered output | Eliminates external reference IC and associated layout complexity while maintaining ±2 LSB INL performance. |
| AEC-Q100 qualified (Grade I: –40°C to +85°C) | Validated for automotive under-hood and chassis applications including battery management and ADAS sensor front-ends. |
Applications
| Industrial Process Monitoring | Automotive Battery Management |
|---|---|
Use Scenario: Continuous voltage/current measurement across 8 battery cells in 48V mild-hybrid systems. IC Role / Device Role / Timing Role: 16-bit SAR ADC with bipolar mode captures cell-to-cell differentials; REFCOMP provides stable 4.096V reference for ratiometric accuracy. Use Value: ±2 LSB INL ensures <0.003% full-scale error in SoC estimation, meeting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Real-time temperature and voltage sampling across engine bay sensors (coolant, oil, intake air). IC Role / Device Role / Timing Role: AEC-Q100 qualified ADC acquires 8 channels at 200ksps using internal reference; nap mode minimizes ECU standby power. Use Value: 89 dB SNR preserves signal integrity in noisy 12V automotive electrical environment, enabling robust fault detection. |
| Portable Medical Instrumentation | High-Speed Data Acquisition Systems |
Use Scenario: Battery-powered ECG front-end acquiring lead I–III differential signals plus respiration and motion artifacts. IC Role / Device Role / Timing Role: Configurable MUX routes differential leads to CH0–CH3; sleep mode (0.2 µA) extends runtime between charges. Use Value: 1.3 mA active current and 60 ms wake-up time enable rapid response to patient events without compromising battery life. |
Use Scenario: Modular DAQ card for lab equipment capturing vibration, acoustic, and strain gauge signals simultaneously. IC Role / Device Role / Timing Role: 200ksps throughput with 1.5 µs acquisition time supports anti-aliasing filter design for 1.25 MHz full-power bandwidth. Use Value: Channel-to-channel isolation >117 dB prevents crosstalk between high-gain sensor channels in multi-sensor test benches. |
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 |
|---|---|---|---|
| AD7689BCPZ-RL7 | 16-bit, 8-channel, 250ksps; SPI-only interface; no internal reference; requires external 2.5V ref. | Better speed but higher system BOM cost and layout complexity due to external reference and decoupling. | Select when maximum throughput (250ksps) is prioritized over integration and power efficiency. |
| ADS8689IPWR | 16-bit, 8-channel, 100ksps; integrated programmable gain amplifier (PGA); 5V supply; no nap/sleep modes. | Includes PGA for direct connection to mV-level sensors but lacks low-power states for battery use. | Select when sensor signal conditioning (gain/offset adjustment) is required on-chip and 100ksps suffices. |
Compared with AD7689BCPZ-RL7 and ADS8689IPWR, the LTC1867AIGN#TRPBF uniquely combines internal reference, nap/sleep power management, AEC-Q100 qualification, and guaranteed ±2 LSB INL - making it optimal for space- and power-constrained industrial and automotive DAQ where system-level integration reduces validation effort.
Availability
LTC1867AIGN#TRPBF is available at Aetrix Electronics and suitable for industrial process control, automotive battery monitoring, and portable medical instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC1867AIGN#TRPBF 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 LTC1867AIGN#TRPBF belongs to the LTC® precision data acquisition family, designed specifically for low-power, high-accuracy multichannel measurement in harsh environments - emphasizing DC precision, noise immunity, and seamless integration with microcontroller SPI interfaces.
FAQ
What is the operating temperature range for the LTC1867AIGN#TRPBF?
The LTC1867AIGN#TRPBF is specified for –40°C to +85°C (Grade I), fully qualified to AEC-Q100 standards. This range covers under-hood automotive, industrial control cabinets, and outdoor instrumentation deployments where ambient thermal stress is significant. All key specifications - including ±2 LSB INL and 89 dB SNR - are guaranteed across this full range.
Does the LTC1867AIGN#TRPBF require an external reference?
No, the LTC1867AIGN#TRPBF includes a factory-trimmed 2.5 V internal bandgap reference with ±15 ppm/°C tempco and buffered 4.096 V output at REFCOMP. External reference is optional - used only when higher accuracy or lower drift is needed, enabled by overdriving VREF through its 6 kΩ series resistor.
How does the nap mode function in the LTC1867AIGN#TRPBF?
Nap mode activates automatically when CS/CONV remains high after conversion completion. In this state, the LTC1867AIGN#TRPBF disables the SAR logic and sample-and-hold circuitry while keeping VREF and REFCOMP active, reducing supply current from 1.3 mA to 150 µA - significantly lowering average power in low-duty-cycle sampling applications.
Can the LTC1867AIGN#TRPBF perform differential and single-ended conversions simultaneously?
Yes - the LTC1867AIGN#TRPBF's 8-channel MUX supports mixed configurations. For example, with COM = 1, CH0–CH6 can be acquired single-ended against CH7/COM, while CH7/COM itself serves as the common reference. The 7-bit control word (SD/OS/S1/S0/COM/UNI/SLP) enables real-time reconfiguration without hardware changes.
What is the minimum acquisition time required before a valid conversion on the LTC1867AIGN#TRPBF?
The LTC1867AIGN#TRPBF specifies a minimum acquisition time of 1.5 µs over temperature. This ensures full settling of the internal sample-and-hold capacitor for accurate 16-bit conversion. When driving high-impedance sources, additional external filtering or longer acquisition windows may be needed - verified via the tACQ parameter in the timing table.
LTC1867AIGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867AIGN#TRPBF FAQ
1.How can I place an order for LTC1867AIGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867AIGN#TRPBF 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 LTC1867AIGN#TRPBF reliable?
The price and inventory of LTC1867AIGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867AIGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1867AIGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867AIGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867AIGN#TRPBF?
LTC1867AIGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867AIGN#TRPBF 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 LTC1867AIGN#TRPBF?
For technical support, including LTC1867AIGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867AIGN#TRPBF requirements.
6.How does Aetrix verify that LTC1867AIGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867AIGN#TRPBF 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 LTC1867AIGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1867AIGN#TRPBF?
All LTC1867AIGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867AIGN#TRPBF, 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 LTC1867AIGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC1867AIGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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