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Analog Devices Inc. LTC1867ACGN#PBF
- Part No.:
- LTC1867ACGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867ACGN#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:655
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Product details
Overview
LTC1867ACGN#PBF from Analog Devices is a 16-bit, 8-channel, 200ksps successive-approximation ADC with integrated 2.5V reference, SPI/MICROWIRE serial interface, and configurable single-ended/differential input multiplexer. It delivers ±2LSB max INL, 89dB SNR (with internal reference), and operates from a single 5V supply. It is used in high-precision industrial data acquisition systems requiring low power and stable DC performance.
For engineers reviewing the LTC1867ACGN#PBF datasheet, LTC1867ACGN#PBF pinout, LTC1867ACGN#PBF application, or LTC1867ACGN#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation over 0°C to 70°C, automatic nap/sleep power management, unipolar/bipolar conversion mode support, and SSOP-16 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC1867ACGN#PBF implements a capacitive SAR architecture with differential 16-bit DAC, low-power comparator, and on-chip sample-and-hold. Its analog input mux supports eight channels with programmable configuration via 7-bit serial command word - including SD (single/diff), OS (odd/sign), COM (CH7/COM mode), UNI (unipolar/bipolar), and SLP (sleep enable).
It features dual reference outputs: VREF (2.5V ±20mV, ±15ppm/°C) and REFCOMP (4.096V buffered, bypassed with 10µF + 0.1µF). Timing is governed by internal factory-trimmed clock (3.5µs max conversion time, 1.5µs min acquisition), synchronized to external SCK up to 40MHz for serial readout.
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) |
| Sample Rate | 200ksps - enables real-time capture of signals up to 100kHz Nyquist bandwidth without aliasing |
| INL (Max) | ±2 LSB - ensures absolute accuracy ≤ ±0.003% FS, critical for calibration-sensitive instrumentation |
| SNR | 89 dB (typ, 1kHz input) - supports >14.5 ENOB for high-fidelity signal digitization with internal reference |
| Supply Current | 1.3 mA at 200ksps - enables battery-operated or thermally constrained designs without active cooling |
| Analog Input Range | 0–4.096 V (unipolar) or ±2.048 V (bipolar) - matches standard industrial sensor output ranges directly |
| Reference | Internal 2.5V bandgap (±15 ppm/°C) + 4.096V buffered REFCOMP - eliminates need for external precision reference in most applications |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN), 0.15mm lead pitch, 5.0mm × 6.2mm body size, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH6 (Pins 1–7) | Analog Input Channel | Single-ended or differential "+" inputs; configurable per 7-bit command word |
| CH7/COM (Pin 8) | Configurable Analog Terminal | Acts as CH7 (single-ended) or common "–" input for differential pairs when COM=1 |
| REFCOMP (Pin 9) | Buffered Reference Output | 4.096V output; must be bypassed with 10µF + 0.1µF to GND for stable noise performance |
| VREF (Pin 10) | Internal Reference Tap | 2.5V output; can be overdriven externally via 6kΩ series resistor for improved accuracy/drift |
| CS/CONV (Pin 11) | Conversion Start / Serial Frame | Rising edge initiates conversion; falling edge enables serial data output on SDO |
| SCK (Pin 12) | Serial Clock Input | Synchronizes 16-bit readout; supports up to 40MHz clock for fast data transfer |
| SDO (Pin 13) | Serial Data Output | Outputs conversion result: straight binary (unipolar) or two's complement (bipolar) |
| SDI (Pin 14) | Serial Data Input | Accepts 7-bit configuration word to select channel, mode, and sleep state |
| GND (Pin 15) | Analog/Digital Ground | Common return for all analog and digital circuitry; requires low-impedance ground plane |
| VDD (Pin 16) | Power Supply | Single 4.75–5.25V supply; bypass with 10µF + 0.1µF tantalum/ceramic to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no-missing-codes performance | Guaranteed over full 0°C to 70°C operating range - eliminates code gaps in closed-loop control and metrology |
| Configurable 8-channel analog mux | Supports mixed single-ended/differential inputs and unipolar/bipolar modes via software-selectable command word |
| Automatic nap mode | Reduces current from 1.3mA to 150µA between conversions - cuts average power by >85% at low sample rates |
| Integrated reference system | VREF (2.5V) + REFCOMP (4.096V) with factory trimming and tempco compensation - removes external reference cost and layout complexity |
| SPI/MICROWIRE-compatible interface | Standard 3-wire serial protocol with CS/CONV framing - simplifies host MCU integration and reduces GPIO count |
Applications
| Industrial Process Monitoring | Portable Test Equipment |
|---|---|
Use Scenario: Continuous monitoring of 4–20mA transmitters, RTD bridges, and strain gauges in PLC I/O modules. IC Role / Device Role / Timing Role: Primary 16-bit digitizer with programmable gain and bipolar input support for sensor signal conditioning. Use Value: ±2LSB INL ensures traceable calibration against NIST standards; 89dB SNR preserves dynamic range for low-level sensor outputs. |
Use Scenario: Handheld multimeter or oscilloscope front-end capturing voltage, current, and temperature readings. IC Role / Device Role / Timing Role: Low-power, high-resolution ADC enabling >10-hour battery life while maintaining 16-bit resolution. Use Value: 1.3mA active current and automatic nap mode extend runtime; SSOP-16 footprint minimizes board area in compact enclosures. |
| Multiplexed Sensor Arrays | Automotive Diagnostic Tools |
Use Scenario: Simultaneous sampling of multiple thermocouples, pressure sensors, and accelerometers in HVAC or energy metering systems. IC Role / Device Role / Timing Role: 8-channel MUX-based sequencer with per-channel mode configuration for heterogeneous sensor types. Use Value: Single-command reconfiguration allows dynamic switching between unipolar (voltage) and bipolar (differential ΔT) modes without hardware change. |
Use Scenario: Aftermarket OBD-II scan tools reading analog engine parameters (TPS, MAP, ECT) alongside digital CAN bus data. IC Role / Device Role / Timing Role: High-accuracy analog front-end for legacy analog sensor interfaces in vehicle diagnostics hardware. Use Value: AEC-Q100 qualified variants exist (e.g., LTC1867IGN#WPBF); this C-grade part provides identical performance for non-safety-critical bench tools. |
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; external reference required; SPI interface; 2.5V to 5.5V supply | Higher speed but higher power (4.5mA @ 500ksps); lacks integrated reference and nap mode | Select when throughput >200ksps is mandatory and external reference infrastructure already exists |
| AD7606BSTZ | 8-channel, 16-bit, 200ksps; simultaneous sampling; on-chip reference; parallel + SPI interface | Requires parallel bus or complex SPI framing; larger 64-lead LQFP package; higher cost | Select when phase-coherent multi-channel acquisition (e.g., motor current/voltage) is required |
Compared with ADS8688IPWR and AD7606BSTZ, the LTC1867ACGN#PBF offers lowest system-level BOM count due to integrated reference and smallest PCB footprint (SSOP-16), making it optimal for cost- and space-sensitive industrial DAQ where 200ksps suffices.
Availability
LTC1867ACGN#PBF is available at Aetrix Electronics and suitable for industrial process control, portable test equipment, and multiplexed sensor array applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for LTC1867ACGN#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1867ACGN#PBF belongs to the LTC® precision data acquisition family, designed specifically for low-power, high-accuracy, multi-channel measurement systems where integration, reliability, and DC performance are prioritized over raw speed.
FAQ
What is the operating temperature range for the LTC1867ACGN#PBF?
The LTC1867ACGN#PBF is rated for 0°C to 70°C ambient operation. This "C-grade" specification is confirmed in the official Analog Devices ordering table and applies to all electrical characteristics unless otherwise noted. The "A" suffix denotes enhanced AC performance (e.g., tighter INL), not extended temperature - the temperature grade is defined solely by the "C" or "I" suffix in the part number.
Does the LTC1867ACGN#PBF require an external reference?
No, the LTC1867ACGN#PBF does not require an external reference. It integrates a factory-trimmed 2.5V bandgap reference (VREF) and a buffered 4.096V output (REFCOMP), both specified over temperature. External reference use is optional - for example, tying VREF to GND and driving REFCOMP with a 5V source improves SNR to 90dB, but is not necessary for standard operation.
How does the automatic nap mode reduce power consumption in the LTC1867ACGN#PBF?
The LTC1867ACGN#PBF enters automatic nap mode when CS/CONV remains high after conversion completion. In this state, the analog front-end and reference buffers remain active, but the SAR logic and comparator bias are reduced, lowering supply current from 1.3mA to 150µA. This cuts average power significantly at sample rates below 200ksps without requiring software intervention.
Can the LTC1867ACGN#PBF perform differential measurements using only four channels?
Yes. The LTC1867ACGN#PBF supports four true differential pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7) when configured with SD=0 and COM=0. Each pair shares a common sampling instant, ensuring matched acquisition timing. The 7-bit command word also allows mixing differential and single-ended channels within one sequence - for example, measuring three differential thermocouples and one single-ended voltage simultaneously.
What is the maximum SCK frequency supported by the LTC1867ACGN#PBF during serial readout?
The LTC1867ACGN#PBF supports SCK frequencies up to 40MHz during serial readout, as specified in the Timing Characteristics table. At 40MHz, t2 (SDO valid after SCK↓) is guaranteed ≤22ns with CL = 25pF. For rising-edge capture, 20MHz is recommended to meet setup time requirements; falling-edge capture enables full 40MHz operation with proper host timing margins.
LTC1867ACGN#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:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867ACGN#PBF FAQ
1.How can I place an order for LTC1867ACGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867ACGN#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 LTC1867ACGN#PBF reliable?
The price and inventory of LTC1867ACGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867ACGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1867ACGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867ACGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867ACGN#PBF?
LTC1867ACGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867ACGN#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 LTC1867ACGN#PBF?
For technical support, including LTC1867ACGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867ACGN#PBF requirements.
6.How does Aetrix verify that LTC1867ACGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1867ACGN#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 LTC1867ACGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1867ACGN#PBF?
All LTC1867ACGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867ACGN#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 LTC1867ACGN#PBF part is unused and in its original packaging.
Return procedure for LTC1867ACGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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