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Analog Devices Inc. LTC1867LCGN#TRPBF
- Part No.:
- LTC1867LCGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LCGN#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,437
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Product details
Overview
LTC1867LCGN#TRPBF from Analog Devices is a 16-bit, 175ksps, 8-channel successive-approximation ADC with integrated 1.25V reference, SPI/MICROWIRE interface, true differential input capability, and ±3LSB INL over temperature. It operates from a single 2.7V supply and supports unipolar (0–2.5V) or bipolar (±1.25V) conversion modes - ideal for high-precision industrial data acquisition systems requiring low power and space-constrained layouts.
For engineers reviewing the LTC1867LCGN#TRPBF datasheet, LTC1867LCGN#TRPBF pinout, LTC1867LCGN#TRPBF application, or LTC1867LCGN#TRPBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, automatic nap/sleep mode current (170µA/0.2µA), channel-to-channel isolation (–112dB at 100kHz), and compatibility with both internal and external reference configurations.
Technical Context
The LTC1867LCGN#TRPBF implements a capacitive SAR architecture with differential 16-bit DAC, low-power comparator rejecting common-mode noise, and configurable 8-channel analog multiplexer supporting single-ended, differential, or mixed-input topologies. Its internal clock is factory-trimmed to ensure 3.2µs typical conversion time and 175ksps throughput across temperature.
It features dual reference paths: a curvature-corrected 1.25V bandgap reference (±20ppm/°C tempco) buffered at VREF (Pin 10), and a 2× gain-referenced 2.5V output at REFCOMP (Pin 9), both requiring specific capacitor bypassing (2.2µF + 0.1µF and 10µF + 0.1µF respectively) for optimal noise and stability performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes over full temperature range for high-fidelity signal capture in precision measurement. |
| Sample Rate | 175ksps - enables real-time monitoring of fast transients in motor control or vibration analysis without undersampling. |
| INL | ±3LSB max - ensures monotonicity and accurate end-point linearity critical for closed-loop feedback accuracy. |
| Supply Current | 750µA at 175ksps, 170µA in nap mode, 0.2µA in sleep - supports battery operation in portable instrumentation with minimal thermal load. |
| Input Range | 0–2.5V unipolar or ±1.25V bipolar - accommodates both sensor outputs referenced to ground and differential signals from bridge sensors. |
| Channel Isolation | –112dB at 100kHz - prevents crosstalk between adjacent channels during simultaneous multi-sensor sampling. |
| Reference Tempco | ±20ppm/°C (internal) - maintains <0.02% full-scale drift over 0°C to 70°C operating range without external calibration. |
Pinout & Package
Housed in a 16-pin narrow plastic SSOP (GN package), the LTC1867LCGN#TRPBF uses a compact footprint (5.3mm × 6.2mm) suitable for dense PCB layouts while maintaining standard lead pitch (0.65mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7/COM (Pins 1–8) | Analog input multiplexer terminals | Support configurable single-ended, differential, or common-mode inputs; CH7/COM serves as dedicated negative input or shared COM node depending on COM bit setting. |
| REFCOMP (Pin 9) | 2.5V reference buffer output | Provides low-impedance 2.5V reference for ADC core; requires 10µF + 0.1µF bypass to minimize noise-induced quantization error. |
| VREF (Pin 10) | 1.25V reference output/input | Delivers factory-trimmed internal reference or accepts external reference via 3kΩ series resistor for improved accuracy/drift. |
| CS/CONV (Pin 11) | Conversion start & serial frame enable | Rising edge initiates conversion; falling edge enables SDO output and allows configuration word loading on next SCK cycle. |
| SCK (Pin 12) | Serial clock input | Synchronizes 16-bit data transfer at up to 20MHz; supports both rising- and falling-edge capture per timing spec. |
| SDO (Pin 13) | Digital output | Outputs conversion result in straight binary (unipolar) or two's complement (bipolar); Hi-Z when CS/CONV high. |
| SDI (Pin 14) | Digital input | Accepts 7-bit configuration word (SD, OS, S1, S0, COM, UNI, SLP) to select channel, mode, and power state before each conversion. |
| GND (Pin 15) | Analog & digital ground | Single ground plane required; separation not needed due to integrated design minimizing internal coupling paths. |
| VDD (Pin 16) | Power supply | 2.7V–3.6V single supply powers analog and digital sections; requires 10µF + 0.1µF bypass for stable reference and low-noise conversion. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Enables rejection of common-mode noise up to 112dB, critical for EMI-prone industrial environments and sensor front-ends. |
| Automatic nap mode between conversions | Reduces average current from 750µA to 170µA without software intervention, extending battery life in portable DAQ systems. |
| Configurable 8-channel MUX with COM pin flexibility | Allows dynamic reconfiguration of input topology (e.g., CH0–CH1 diff → CH2–GND SE) via 7-bit command, simplifying firmware-driven channel scanning. |
| Internal 1.25V reference with external override capability | Eliminates need for external reference IC in cost-sensitive designs, while retaining option to upgrade to ultra-low-drift external reference via VREF pin. |
| Guaranteed 16-bit no-missing-codes performance | Ensures monotonic response across full operating range - essential for position sensing, servo control, and medical instrumentation where code gaps cause instability. |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring pressure, temperature, and flow sensors across multiple PLC I/O modules in chemical plant automation. IC Role / Device Role / Timing Role: 16-bit ADC digitizing 8 analog sensor outputs with ±1.25V differential range and 175ksps aggregate throughput. Use Value: ±3LSB INL and –112dB channel isolation prevent cross-talk-induced control errors in safety-critical loop regulation. |
Use Scenario: Capturing transient waveforms from vibration sensors on rotating machinery for predictive maintenance analytics. IC Role / Device Role / Timing Role: High-fidelity sampling engine with 83.7dB SNR and 1.25MHz full-power bandwidth enabling accurate FFT-based spectral analysis. Use Value: 175ksps sustained rate with no missing codes preserves waveform integrity during burst-mode acquisition without interpolation artifacts. |
| Battery-Operated Systems | Multiplexed Data Acquisition Systems |
Use Scenario: Portable handheld multimeter with auto-ranging, thermocouple, and RTD measurement functions powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power 16-bit converter drawing only 750µA active and 0.2µA in sleep mode, controlled via SPI-configurable nap/sleep states. Use Value: 750µA at full speed and automatic nap mode extend battery life beyond 100 hours per charge in intermittent measurement duty cycles. |
Use Scenario: Modular sensor hub aggregating inputs from strain gauges, accelerometers, and humidity sensors in smart building infrastructure. IC Role / Device Role / Timing Role: 8-channel MUX with programmable COM pin and SD/OS/S1/S0 addressing enabling flexible sensor mapping without hardware changes. Use Value: Single-chip solution replaces discrete MUX + ADC combinations, reducing BOM count and PCB area by >40% versus discrete alternatives. |
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 |
|---|---|---|---|
| AD7682BCPZ-RL7 | 16-bit, 250ksps, 4-channel, SPI interface, no internal reference - requires external 2.5V ref; higher power (1.6mA @ 250ksps). | Targeted at higher-speed, lower-channel-count applications where external reference precision justifies added BOM complexity. | Select when throughput >175ksps is mandatory and system already includes high-accuracy reference; avoid if board space or power budget is constrained. |
| ADS8688IPWR | 16-bit, 100ksps, 8-channel, SPI, integrated 4.096V ref, ±0.5LSB INL, but 3.3V-only supply and larger TSSOP-38 package. | Optimized for precision industrial DAQ with tighter INL, but incompatible with 2.7V battery operation and occupies 2.5× more PCB area. | Choose for metrology-grade accuracy in mains-powered systems; reject for portable, low-voltage, or space-limited designs. |
Compared with AD7682BCPZ-RL7 and ADS8688IPWR, the LTC1867LCGN#TRPBF uniquely balances 175ksps speed, 8-channel integration, internal reference, 2.7V operation, and SSOP-16 footprint - making it the only option meeting all four constraints simultaneously in compact, battery-aware industrial DAQ.
Availability
LTC1867LCGN#TRPBF is available at Aetrix Electronics and suitable for industrial process control, high-speed data acquisition, and battery-operated systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1867LCGN#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1867LCGN#TRPBF belongs to the LTC® micropower precision ADC product line, designed specifically for space- and power-constrained industrial and portable instrumentation where 16-bit accuracy must coexist with sub-mA active current and integrated reference functionality.
FAQ
What is the operating temperature range for the LTC1867LCGN#TRPBF?
The LTC1867LCGN#TRPBF is specified for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "LC" suffix in the part number and the ordering table listing LTC1867LCGN#TRPBF under the 0°C to 70°C temperature range. The device meets all electrical specifications - including ±3LSB INL and 175ksps sample rate - across this full range without derating.
Does the LTC1867LCGN#TRPBF support true differential input measurements?
Yes, the LTC1867LCGN#TRPBF supports true differential input measurements across all eight channels using its configurable analog multiplexer. When configured with SD=0 and appropriate OS/S1/S0 bits, pairs like CH0/CH1 or CH2/CH3 operate as fully differential inputs with common-mode rejection, enabling accurate measurement of bridge sensor outputs or isolated signals without external instrumentation amplifiers.
Can the LTC1867LCGN#TRPBF use an external reference instead of the internal one?
Yes, the LTC1867LCGN#TRPBF can use an external reference. The VREF pin (Pin 10) includes a 3kΩ series resistor that allows overdriving with an external 1.25V reference for improved accuracy or drift performance. Alternatively, tying VREF to GND enables use of an external 2.5V reference applied directly to REFCOMP (Pin 9), bypassing the internal reference amplifier entirely.
What is the minimum acquisition time required before a valid conversion with the LTC1867LCGN#TRPBF?
The minimum acquisition time for the LTC1867LCGN#TRPBF is 2.01µs at 2.7V supply, as specified in the datasheet under "Analog Input" parameters. This time ensures the internal sample-and-hold capacitor fully settles to within 1/2 LSB of final value. Shorter acquisition times may result in code-dependent errors or increased transition noise, especially with high-impedance source drivers.
How does the nap mode function in the LTC1867LCGN#TRPBF?
The LTC1867LCGN#TRPBF enters automatic nap mode when CS/CONV remains high after conversion completion. In this state, the device reduces supply current from 750µA to 170µA while retaining full configuration and reference bias - enabling rapid wake-up (<3.7µs conversion time) without reinitialization. Nap mode is transparent to firmware and requires no register writes.
LTC1867LCGN#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:
- -
LTC1867LCGN#TRPBF FAQ
1.How can I place an order for LTC1867LCGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LCGN#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 LTC1867LCGN#TRPBF reliable?
The price and inventory of LTC1867LCGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LCGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1867LCGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LCGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LCGN#TRPBF?
LTC1867LCGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LCGN#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 LTC1867LCGN#TRPBF?
For technical support, including LTC1867LCGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LCGN#TRPBF requirements.
6.How does Aetrix verify that LTC1867LCGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LCGN#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 LTC1867LCGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1867LCGN#TRPBF?
All LTC1867LCGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LCGN#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 LTC1867LCGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC1867LCGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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