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Analog Devices Inc. LTC1867LACGN#TRPBF
- Part No.:
- LTC1867LACGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LACGN#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,064
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Product details
Overview
LTC1867LACGN#TRPBF from Analog Devices is a 16-bit, 175ksps, 8-channel successive-approximation ADC with integrated 1.25V reference, SPI/MICROWIRE serial interface, and configurable single-ended/differential input multiplexer. It delivers ±3LSB INL, 16-bit no missing codes over temperature, and operates from a 2.7V supply. It is used in high-precision industrial process control and battery-operated data acquisition systems.
For engineers reviewing the LTC1867LACGN#TRPBF datasheet, LTC1867LACGN#TRPBF pinout, LTC1867LACGN#TRPBF application, or LTC1867LACGN#TRPBF equivalent, key selection criteria include guaranteed 175ksps sampling rate, true differential input capability, internal reference accuracy (±15mV), sleep mode current (≤0.2µA), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC1867LACGN#TRPBF implements a capacitive SAR architecture with differential 16-bit DAC and low-power comparator rejecting common-mode noise. Its 8-channel analog MUX supports dynamic reconfiguration via 7-bit serial command, enabling mixed unipolar/bipolar and single-ended/differential channel assignments on-the-fly.
Conversion is initiated by rising edge on CS/CONV; acquisition time is 1.68µs (typ), conversion time is 3.2µs (typ), and full cycle enables 175ksps throughput. Internal reference provides 1.25V ±15mV output with ±20ppm/°C tempco, while REFCOMP delivers buffered 2.5V output for improved noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across full temperature range (0°C to 70°C). |
| Sampling Rate | 175ksps - maximum sustained conversion rate with full DC and AC performance specified. |
| INL | ±3LSB max - ensures absolute accuracy ≤±0.046% of full-scale range in bipolar (±1.25V) or unipolar (0–2.5V) modes. |
| Supply Current | 750µA at 175ksps - enables ultra-low-power operation in battery-powered systems without sacrificing speed. |
| Reference | Internal 1.25V ±15mV - factory-trimmed bandgap reference with ±20ppm/°C drift, usable as precision source or buffer input. |
| Digital Interface | SPI/MICROWIRE-compatible - 3-wire serial protocol (SDI/SDO/SCK) with CS/CONV framing, supporting both straight binary and two's complement formats. |
| Input Configuration | 8-channel MUX with SD/OS/S1/S0/COM/UNI/SLP control - enables real-time switching between single-ended, differential, unipolar, and bipolar modes per conversion. |
Pinout & Package
Housed in a 16-pin narrow plastic SSOP (GN) package with 0.635mm pitch and 5.0mm × 6.2mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH6 (Pins 1–7) | Analog Input Channel | Single-ended or differential "+" inputs; configurable via MUX control bits; require ≤1kΩ source impedance for <1LSB gain error. |
| CH7/COM (Pin 8) | Configurable Analog Terminal | Functions as CH7 (single-ended) or common "–" input for differential pairs when COM bit = 1; must be bypassed if unused. |
| VDD (Pin 16) | Power Supply | 2.7V–3.6V analog/digital supply; requires 10µF + 0.1µF ceramic bypass to GND for stable reference and low-noise operation. |
| GND (Pin 15) | Analog/Digital Ground | Common return for VDD, analog inputs, and digital I/O; star grounding recommended to minimize noise coupling. |
| CS/CONV (Pin 11) | Conversion Trigger & Serial Frame | Rising edge initiates conversion; falling edge enables SDO output and accepts SDI configuration word for next cycle. |
| SCK (Pin 12) | Serial Clock | Up to 20MHz clock synchronizes 16-bit data shift-in (SDI) and shift-out (SDO); supports both rising- and falling-edge capture. |
| SDI (Pin 14) | Serial Data Input | Accepts 7-bit MUX configuration word (SD/OS/S1/S0/COM/UNI/SLP) during CS/CONV low phase to define next conversion parameters. |
| SDO (Pin 13) | Serial Data Output | Outputs 16-bit result in straight binary (unipolar) or two's complement (bipolar); Hi-Z when CS/CONV high. |
| VREF (Pin 10) | Reference Output/Input | 1.25V ±15mV internal reference output; also accepts external reference via 3kΩ series resistor for improved accuracy or drift performance. |
| REFCOMP (Pin 9) | Buffered Reference Output | 2.5V buffered output derived from VREF; requires 10µF + 0.1µF bypass for optimal noise rejection in sensitive measurement applications. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Inputs | Enables rejection of common-mode noise up to 112dB (100kHz), critical for precision sensor interfaces in noisy industrial environments. |
| Automatic Nap Mode | Reduces current from 750µA to 170µA between conversions without software intervention, cutting average power in burst-sampling applications. |
| On-Chip Reference with External Override | Eliminates need for external reference IC while allowing upgrade path to higher-accuracy external sources via VREF pin. |
| Pin Compatibility with LTC1867 | Enables drop-in replacement for legacy LTC1867 designs without PCB changes, preserving layout investment during performance upgrades. |
| AEC-Q100 Qualified | Validated for automotive applications (-40°C to 85°C), supporting use in engine control, ADAS sensor hubs, and infotainment subsystems. |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring thermocouple, RTD, and strain gauge outputs in PLC analog input modules with 16-bit resolution and multi-channel scanning. IC Role / Device Role / Timing Role: 8-channel SAR ADC performing synchronized sampling at 175ksps with ±3LSB INL to ensure traceable calibration compliance. Use Value: Eliminates external reference and level-shifting circuitry, reducing BOM count by ≥3 components per channel while maintaining <0.05% total unadjusted error. | Use Scenario: Digitizing vibration, acoustic, or ultrasonic signals in portable test equipment requiring low power and high SNR. IC Role / Device Role / Timing Role: Precision ADC capturing transient waveforms with 83.7dB SNR and –95.1dB spurious-free dynamic range at 1kHz input. Use Value: Enables >14-bit effective resolution in battery-powered handheld analyzers with 750µA active current and automatic nap mode extending runtime. |
| Battery-Operated Systems | Multiplexed Sensor Networks |
Use Scenario: Long-life remote environmental monitoring nodes measuring temperature, humidity, and gas concentration using low-drift sensors. IC Role / Device Role / Timing Role: Low-power ADC operating from coin cell or energy-harvesting source, entering sleep mode (<0.2µA) between scheduled measurements. Use Value: Achieves >10-year battery life in wireless sensor nodes by combining 0.2µA sleep current, programmable conversion rate, and on-chip reference stability. | Use Scenario: Distributed condition monitoring across rotating machinery with multiple accelerometers, current shunts, and voltage dividers feeding one ADC. IC Role / Device Role / Timing Role: 8-channel MUX ADC dynamically selecting channels via serial command, supporting mixed unipolar/differential inputs per scan cycle. Use Value: Reduces system-level component count by consolidating eight independent signal chains into a single compact SSOP package with shared reference and digital interface. |
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, 250ksps, pseudo-differential inputs only; no true differential mode; requires external reference. | Higher speed but lacks true differential input and internal reference - unsuitable for bipolar sensor interfaces without added components. | Select when maximum throughput (>175ksps) is prioritized over input flexibility and reference integration. |
| LTC2315ITS8#TRMPBF | 16-bit, 1Msps, single-channel, true differential; no MUX; internal reference; smaller 8-pin TSOT-23 package. | Optimized for high-speed single-channel applications; cannot replace 8-channel scanning functionality without redesigning front-end MUX. | Select when space-constrained designs require highest speed per channel and channel count is ≤1. |
Compared with AD7689BCPZ-RL7 and LTC2315ITS8#TRMPBF, the LTC1867LACGN#TRPBF uniquely combines 8-channel multiplexing, true differential inputs, internal reference, and AEC-Q100 qualification - making it the only option for automotive or industrial multi-sensor systems needing all four features in one device.
Availability
LTC1867LACGN#TRPBF is available at Aetrix Electronics and suitable for industrial process control, battery-operated instrumentation, and automotive sensor acquisition systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC1867LACGN#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 LTC1863L/LTC1867L product line was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing integrated references, flexible input architectures, and robust serial interfaces for embedded microcontroller interfacing.
FAQ
What is the operating temperature range for the LTC1867LACGN#TRPBF?
The LTC1867LACGN#TRPBF is rated for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix in its part number. This distinguishes it from the "I" grade (–40°C to 85°C) and automotive "W" grade variants. All DC and AC specifications - including ±3LSB INL, 175ksps sampling rate, and 750µA supply current - are guaranteed across this full 0°C to 70°C range.
Does the LTC1867LACGN#TRPBF support true differential input mode?
Yes, the LTC1867LACGN#TRPBF supports true differential input mode via its 8-channel MUX. When configured with SD=0 and COM=1, pairs such as CH0/CH7/COM, CH2/CH7/COM, and CH4/CH7/COM operate as fully differential inputs with matched gain and phase response. This enables >112dB channel-to-channel isolation and rejection of common-mode noise - a capability confirmed in the datasheet's Typical Performance Characteristics section.
Can the internal reference of the LTC1867LACGN#TRPBF be overdriven with an external reference?
Yes, the VREF pin (Pin 10) of the LTC1867LACGN#TRPBF includes a built-in 3kΩ series resistor, allowing direct connection of an external reference voltage (e.g., 1.25V or 2.5V) without additional components. When an external reference is applied, the internal bandgap is disabled, and the external source drives both the ADC core and the REFCOMP buffer - improving accuracy and temperature drift beyond the ±15mV/±20ppm/°C internal spec.
How does the automatic nap mode function in the LTC1867LACGN#TRPBF?
The LTC1867LACGN#TRPBF enters automatic nap mode when CS/CONV remains high after conversion completion, reducing supply current from 750µA (active) to 170µA (nap) without software command. This state persists until the next rising edge on CS/CONV triggers a new conversion. Nap mode is distinct from sleep mode (0.2µA), which requires explicit SLP bit assertion in the SDI configuration word.
Is the LTC1867LACGN#TRPBF pin-compatible with earlier LTC1867 versions?
Yes, the LTC1867LACGN#TRPBF is explicitly documented as pin-compatible with the standard LTC1867 family, including LTC1867LCGN#TRPBF and LTC1867LIGN#TRPBF. The "L" suffix denotes the low-power variant with identical pinout, timing, and register mapping - enabling direct replacement in existing designs without layout modification or firmware changes.
LTC1867LACGN#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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867LACGN#TRPBF FAQ
1.How can I place an order for LTC1867LACGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LACGN#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 LTC1867LACGN#TRPBF reliable?
The price and inventory of LTC1867LACGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LACGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1867LACGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LACGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LACGN#TRPBF?
LTC1867LACGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LACGN#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 LTC1867LACGN#TRPBF?
For technical support, including LTC1867LACGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LACGN#TRPBF requirements.
6.How does Aetrix verify that LTC1867LACGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LACGN#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 LTC1867LACGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1867LACGN#TRPBF?
All LTC1867LACGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LACGN#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 LTC1867LACGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC1867LACGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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