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Analog Devices Inc. LTC1867CGN#PBF
- Part No.:
- LTC1867CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867CGN#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,301
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Product details
Overview
LTC1867CGN#PBF from Analog Devices is a 16-bit, 8-channel, 200ksps successive-approximation ADC with integrated 2.5V reference, SPI/MICROWIRE interface, and configurable single-ended/differential input multiplexer. It delivers ±2LSB INL, 89dB SNR (with internal reference), and operates from a single 5V supply. It is used in industrial process control systems requiring high-resolution, low-power, multi-channel data acquisition.
For engineers reviewing the LTC1867CGN#PBF datasheet, LTC1867CGN#PBF pinout, LTC1867CGN#PBF application, or LTC1867CGN#PBF equivalent, key selection considerations include guaranteed 16-bit no-missing-codes performance over temperature, automatic nap/sleep power management, unipolar/bipolar conversion modes, and narrow 16-pin SSOP packaging for space-constrained designs.
Technical Context
The LTC1867CGN#PBF implements a capacitive successive-approximation architecture with a differential 16-bit DAC and low-power comparator. Its analog input multiplexer supports eight channels with programmable configuration via a 7-bit serial command word-enabling combinations of single-ended, differential, unipolar, and bipolar modes using CH7/COM as either channel or common reference.
It features an on-chip, factory-trimmed, curvature-corrected bandgap reference (2.5V at VREF, 4.096V at REFCOMP) with ±15ppm/°C tempco. Digital timing is driven by an internal clock (3µs typical conversion time), synchronized externally via SCK up to 40MHz, with CS/CONV serving dual roles: conversion trigger and serial frame enable.
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 1.25MHz full-power bandwidth without aliasing. |
| INL | ±2LSB max - ensures accurate end-point linearity critical for precision sensor interfacing and calibration-critical systems. |
| SNR | 89dB typical (with internal reference) - supports >14.5 effective number of bits (ENOB) for high-fidelity signal digitization. |
| Supply Current | 1.3mA at 200ksps, 150µA in nap mode - enables battery-operated or thermally constrained embedded DAQ systems. |
| Analog Input Range | 0–4.096V (unipolar) or ±2.048V (bipolar) - matches standard industrial voltage ranges and simplifies signal conditioning. |
| Reference | Internal 2.5V bandgap (VREF) + buffered 4.096V output (REFCOMP) - eliminates need for external reference in most applications. |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN package), 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 with OS/SD/COM bits. |
| CH7/COM (Pin 8) | Configurable Analog Terminal | Acts as eighth channel (CH7) when COM = 0; serves as common "–" reference for all other channels when COM = 1. |
| REFCOMP (Pin 9) | Reference Buffer Output | Provides stable 4.096V reference for ADC core; requires 10µF + 0.1µF bypass for optimal noise performance. |
| VREF (Pin 10) | Internal Reference Tap | 2.5V bandgap output; can be overdriven externally via 6kΩ series resistor to improve accuracy or drift. |
| CS/CONV (Pin 11) | Conversion Trigger & Serial Frame | Rising edge initiates conversion; low state enables SDO output and frames serial data transfer. |
| SCK (Pin 12) | Serial Clock Input | Synchronizes 16-bit readout (bipolar: two's complement; unipolar: straight binary) at up to 40MHz. |
| SDO (Pin 13) | Digital Data Output | Tri-state output presenting conversion result; high-impedance when CS/CONV is high. |
| SDI (Pin 14) | Serial Configuration Input | Accepts 7-bit command word (SD/OS/S1/S0/COM/UNI/SLP) to configure channel, polarity, and power mode. |
| GND (Pin 15) | Analog/Digital Ground | Common return for analog and digital sections; must be connected to low-impedance ground plane. |
| VDD (Pin 16) | Power Supply | Single 4.75V–5.25V supply powering analog core, reference, and digital interface; requires 10µF + 0.1µF bypass. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no-missing-codes performance | Guaranteed over 0°C to 70°C temperature range - eliminates code gaps in closed-loop control or metrology applications. |
| Configurable 8-channel multiplexer | Supports mixed single-ended/differential, unipolar/bipolar acquisition in one device - reduces BOM count and PCB area vs discrete solutions. |
| Automatic nap mode | Reduces current from 1.3mA to 150µA between conversions - extends battery life in portable DAQ without firmware intervention. |
| Integrated 2.5V/4.096V reference system | Eliminates external reference IC and trimming components - simplifies design, improves long-term stability, and lowers system cost. |
| SPI/MICROWIRE-compatible interface | Uses standard 3-wire serial protocol with CS/CONV framing - interoperable with most microcontrollers and FPGAs without custom logic. |
Applications
| Industrial Process Monitoring | Portable Battery-Powered DAQ |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors across multiple zones in a PLC-based manufacturing line. IC Role / Device Role / Timing Role: Central 16-bit ADC acquiring synchronized samples from 8 analog sensor outputs at 200ksps aggregate rate. Use Value: ±2LSB INL ensures traceable measurement accuracy; integrated reference eliminates calibration drift; nap mode cuts standby power by >90%. |
Use Scenario: Handheld environmental logger capturing voltage outputs from gas, humidity, and light sensors during field surveys. IC Role / Device Role / Timing Role: Low-power, multi-channel front-end digitizing analog sensor outputs with minimal external components. Use Value: 1.3mA active current and 0.2µA sleep current extend AA battery life to >12 months; 16-pin SSOP fits compact enclosure layouts. |
| Multiplexed Sensor Fusion System | Imaging Signal Digitization |
|
Use Scenario: Medical diagnostic device aggregating signals from ECG, respiration, and SpO₂ sensors onto shared analog bus. IC Role / Device Role / Timing Role: Configurable MUX selecting differential pairs (e.g., ECG leads) or single-ended sources (e.g., thermistor) per acquisition cycle. Use Value: Channel-to-channel isolation >117dB prevents crosstalk; programmable COM bit allows flexible sensor grounding schemes. |
Use Scenario: Industrial camera module digitizing analog CCD/CMOS output lines for machine vision inspection. IC Role / Device Role / Timing Role: High-SNR ADC sampling pixel data at up to 200ksps with precise timing controlled by external SCK. Use Value: 89dB SNR preserves image fidelity; 1.25MHz full-power bandwidth captures fast transient edges in line-scan imaging. |
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; 1.8V/3.3V I/O compatible. | Higher throughput but higher power (6.5mA); lacks integrated reference and nap mode; better suited for high-speed industrial controllers. | Select when >200ksps sample rate is mandatory and external reference infrastructure already exists. |
| MAX11624EEE+ | 8-channel, 16-bit, 250ksps; internal 4.096V reference; SPI interface; 20-pin TSSOP package. | Similar integration level but larger footprint; no automatic nap mode; lower SNR (86dB); rated only to 85°C. | Choose for extended temperature operation (–40°C to 85°C) where LTC1867CGN#PBF's 0°C–70°C range is insufficient. |
Compared with ADS8688IPWR and MAX11624EEE+, the LTC1867CGN#PBF offers superior power efficiency at 200ksps (1.3mA vs ≥6mA), tighter DC accuracy (±2LSB INL vs ±4LSB), and autonomous nap mode-making it optimal for battery life and precision in space-constrained industrial DAQ.
Availability
LTC1867CGN#PBF is available at Aetrix Electronics and suitable for industrial process control, portable data acquisition, and imaging systems requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for LTC1867CGN#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 LTC1867CGN#PBF belongs to the LTC® precision data acquisition family, designed specifically for low-power, high-accuracy, multi-channel measurement systems where integration, reliability, and guaranteed specifications over temperature are critical.
FAQ
What is the operating temperature range for the LTC1867CGN#PBF?
The LTC1867CGN#PBF is specified for operation from 0°C to 70°C. This commercial-grade temperature range is confirmed in the manufacturer's ordering information table and applies to all DC and dynamic performance parameters unless otherwise noted. The 'C' grade suffix in the part number explicitly denotes this range, distinguishing it from the 'I' grade (–40°C to 85°C) variants like LTC1867IGN#PBF.
Does the LTC1867CGN#PBF require an external reference?
No, the LTC1867CGN#PBF does not require an external reference. It integrates a factory-trimmed 2.5V bandgap reference (VREF) and a buffered 4.096V output (REFCOMP) optimized for 16-bit performance. External reference use is optional-only needed when improved initial accuracy (<±0.1%) or lower tempco (<±15ppm/°C) is required beyond the internal reference's specifications.
How does the nap mode function in the LTC1867CGN#PBF?
The LTC1867CGN#PBF enters automatic nap mode when CS/CONV remains high after conversion completion. In this state, the analog core powers down while maintaining VREF and REFCOMP regulation, reducing supply current from 1.3mA to 150µA. Nap mode activates autonomously-no software command is needed-and resumes full operation on the next CS/CONV rising edge.
Can the LTC1867CGN#PBF perform differential measurements?
Yes, the LTC1867CGN#PBF supports true differential measurements. Its 8-channel multiplexer can be configured via the SD (single/differential) and COM bits to acquire differential pairs (e.g., CH0–CH1, CH2–CH3) or use CH7/COM as a common reference for up to seven differential inputs. Differential mode provides inherent common-mode noise rejection and improved SNR in noisy industrial environments.
What is the maximum SCK frequency supported by the LTC1867CGN#PBF?
The LTC1867CGN#PBF supports SCK frequencies up to 40MHz, as specified in the Timing Characteristics table. At 40MHz with falling-edge capture, the minimum SCK period is 25ns (t2 ≤ 22ns), enabling full 16-bit readout in under 400ns. This allows tight timing budgets in high-throughput microcontroller or FPGA interfaces without requiring wait states.
LTC1867CGN#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:
- -
LTC1867CGN#PBF FAQ
1.How can I place an order for LTC1867CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867CGN#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 LTC1867CGN#PBF reliable?
The price and inventory of LTC1867CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867CGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1867CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867CGN#PBF?
LTC1867CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867CGN#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 LTC1867CGN#PBF?
For technical support, including LTC1867CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867CGN#PBF requirements.
6.How does Aetrix verify that LTC1867CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1867CGN#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 LTC1867CGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1867CGN#PBF?
All LTC1867CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867CGN#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 LTC1867CGN#PBF part is unused and in its original packaging.
Return procedure for LTC1867CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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