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Analog Devices Inc. LTC1867AIGN#PBF
- Part No.:
- LTC1867AIGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867AIGN#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,663
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Product details
Overview
LTC1867AIGN#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 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 AEC-Q100-compliant performance.
For engineers reviewing the LTC1867AIGN#PBF datasheet, LTC1867AIGN#PBF pinout, LTC1867AIGN#PBF application, or LTC1867AIGN#PBF equivalent, key selection considerations include guaranteed 16-bit no-missing-codes operation over –40°C to +85°C, automatic nap/sleep modes for battery-sensitive designs, and differential channel isolation up to –117dB at 100kHz.
Technical Context
The LTC1867AIGN#PBF implements a capacitive SAR architecture with factory-trimmed internal clock (3.5µs max conversion time) and dual-mode sample-and-hold acquisition (1.5µs min). Its 8-channel analog MUX supports per-channel configuration via 7-bit serial command word, enabling dynamic reconfiguration of single-ended vs. differential inputs and unipolar vs. bipolar ranges on-the-fly.
It integrates a curvature-corrected bandgap reference (2.5V ±20mV, ±15ppm/°C tempco) buffered to 4.096V at REFCOMP, with external overdrive capability via VREF pin. Digital I/O complies with 5V-tolerant logic thresholds (VIH ≥2.4V, VIL ≤0.8V) and supports 40MHz SCK with precise timing windows (t2 ≤22ns, t5 ≥–6ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across full temperature range. |
| Sample Rate | 200ksps - enables real-time capture of signals up to 1.25MHz full-power bandwidth without aliasing. |
| INL | ±2LSB max - ensures end-point linearity error ≤±0.003% FS, critical for calibration-critical sensor interfaces. |
| SNR | 89dB typical (with internal reference) - supports 14.5 effective bits for high-fidelity signal digitization. |
| Supply Current | 1.3mA at 200ksps; 150µA in nap mode - enables <10mW active power, suitable for portable instrumentation. |
| Analog Input Range | ±2.048V (bipolar) or 0–4.096V (unipolar) - matches standard industrial voltage scaling with 16-bit granularity. |
| Channel Isolation | –117dB at 100kHz - prevents crosstalk between adjacent channels in multiplexed sensor arrays. |
Pinout & Package
Package: 16-pin narrow SSOP (GN), 5.3mm × 6.2mm, surface-mount, 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 Common Terminal | Acts as CH7 (COM = 0) or shared "–" reference for all channels (COM = 1). |
| REFCOMP (Pin 9) | Reference Buffer Output | 4.096V buffered reference output; requires 10µF + 0.1µF bypass for noise control. |
| VREF (Pin 10) | Internal Reference Tap | 2.5V bandgap reference node; can be overdriven externally for improved accuracy/drift. |
| CS/CONV (Pin 11) | Conversion Start / Frame Sync | Rising edge initiates conversion; low level enables serial data output on SDO. |
| SCK (Pin 12) | Serial Clock Input | Synchronizes 16-bit readout/write; supports up to 40MHz with defined setup/hold times. |
| 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 for channel, mode, and sleep control before each conversion. |
| GND (Pin 15) | Analog/Digital Ground | Common return for analog and digital sections; must connect to low-impedance ground plane. |
| VDD (Pin 16) | Power Supply | Single 4.75–5.25V supply; requires 10µF + 0.1µF local bypass for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no-missing-codes guarantee | Ensures monotonicity and deterministic code transitions across –40°C to +85°C, eliminating interpolation errors in closed-loop control. |
| Configurable 8-channel MUX | Supports mixed single-ended/differential acquisition within one scan cycle via software-selectable COM bit and SD/OS bits. |
| Automatic nap mode | Reduces current from 1.3mA to 150µA between conversions without firmware intervention, scaling power linearly with sample rate. |
| On-chip 2.5V reference with 4.096V buffer | Eliminates need for external precision reference ICs; 4.096V scale enables direct 16-bit integer mapping of ±2.048V inputs. |
| AEC-Q100 qualified (Grade I) | Validated for automotive applications including engine control modules and battery monitoring where reliability under thermal stress is mandatory. |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
|
Use Scenario: Monitoring multi-sensor arrays (temperature, pressure, flow) in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: Central 16-bit ADC acquiring synchronized samples from 8 analog sensors at 200ksps aggregate rate with programmable gain and offset compensation. Use Value: ±2LSB INL and 89dB SNR enable sub-0.01% measurement accuracy without external calibration, reducing field service costs. |
Use Scenario: Digitizing transient waveforms from vibration sensors or acoustic emission detectors in predictive maintenance systems. IC Role / Device Role / Timing Role: High-fidelity front-end converter capturing 1.25MHz full-power bandwidth signals with minimal harmonic distortion (THD = –95dB). Use Value: –117dB channel-to-channel isolation prevents cross-coupling between adjacent sensor channels during simultaneous sampling. |
| Battery-Operated Test Equipment | Automotive Battery Management Systems |
|
Use Scenario: Portable handheld multimeters and insulation resistance testers requiring >15-hour runtime on AA batteries. IC Role / Device Role / Timing Role: Low-power ADC managing sleep/napping cycles autonomously while maintaining fast wake-up (<60ms) for triggered measurements. Use Value: 150µA nap current and 0.2µA sleep current extend battery life by 3× compared to non-nap alternatives at 1ksps average rate. |
Use Scenario: Cell voltage and temperature monitoring in 12S Li-ion battery packs for EVs and HEVs, operating across –40°C to +85°C. IC Role / Device Role / Timing Role: AEC-Q100 Grade I qualified ADC performing periodic cell balancing feedback with ±2LSB linearity over full automotive temperature range. Use Value: Guaranteed 16-bit no-missing-codes operation ensures accurate state-of-charge estimation even at extreme temperatures. |
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, SPI interface, no internal reference, requires external 2.5V ref; 10-pin LFCSP package. | Lacks integrated reference and nap mode; higher sample rate but demands more PCB area for reference circuitry. | Select when maximum throughput (250ksps) and smallest footprint (3mm × 3mm) outweigh reference integration needs. |
| ADS8688IPWR | 16-bit, 100ksps, SPI, internal 4.096V ref, pseudo-differential inputs only; 28-pin TSSOP package. | Lower sample rate, no true differential mode, larger package; includes integrated PGA (±0.25V to ±12.28V range). | Select when programmable gain amplification is required for wide-dynamic-range sensor signals, not pure precision digitization. |
Compared with AD7682BCPZ-RL7, LTC1867AIGN#PBF saves BOM cost and layout area by integrating reference and nap control, while ADS8688IPWR trades speed for on-chip gain flexibility-neither offers the same combination of 200ksps, true differential MUX, and AEC-Q100 qualification.
Availability
LTC1867AIGN#PBF is available at Aetrix Electronics and suitable for industrial process control, battery-operated test equipment, and automotive battery management systems requiring stable component supply across extended temperature ranges.
Supply support for LTC1867AIGN#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 LTC1867AIGN#PBF belongs to Analog Devices' precision data acquisition product line, designed specifically for space-constrained, low-power, high-accuracy applications demanding guaranteed 16-bit performance over industrial and automotive temperature ranges.
FAQ
What is the guaranteed operating temperature range for LTC1867AIGN#PBF?
The LTC1867AIGN#PBF is rated for –40°C to +85°C (Grade I), with all key specifications-including 16-bit no-missing-codes, ±2LSB INL, and 200ksps sample rate-guaranteed across this full range. This makes LTC1867AIGN#PBF suitable for under-hood automotive and industrial environments where thermal stability is critical.
Does LTC1867AIGN#PBF support true differential input mode?
Yes, LTC1867AIGN#PBF supports true differential input mode using any pair of channels (e.g., CH0/CH1, CH2/CH3) with independent common-mode rejection. When COM = 1, CH7/COM serves as shared negative reference; when COM = 0, differential pairs are formed internally without external wiring changes-configurable via the 7-bit SDI command word.
How does the nap mode in LTC1867AIGN#PBF reduce power consumption?
LTC1867AIGN#PBF automatically enters nap mode (150µA) after conversion completion when CS/CONV remains high. It maintains VREF and REFCOMP regulation but disables high-current analog blocks. Power scales linearly with sample rate-e.g., at 10ksps, average current drops to ~150µA, cutting active power by >90% versus continuous 200ksps operation.
Can LTC1867AIGN#PBF use an external reference instead of the internal one?
Yes, LTC1867AIGN#PBF allows external reference injection at the VREF pin (Pin 10), which overrides the internal 2.5V bandgap. The 6kΩ series resistor enables clean overdrive; REFCOMP (Pin 9) then buffers the external reference ×1.638 to 4.096V scale. This improves long-term drift and initial accuracy beyond the internal reference's ±15ppm/°C and ±20mV specs.
What is the minimum acquisition time required before a valid conversion with LTC1867AIGN#PBF?
The minimum acquisition time for LTC1867AIGN#PBF is 1.5µs (guaranteed over temperature). This ensures full settling of the internal sample-and-hold capacitor for 16-bit accuracy. For high-impedance sources (>1kΩ), additional external RC filtering may extend required acquisition window-but the internal timing is fixed and non-configurable.
LTC1867AIGN#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867AIGN#PBF FAQ
1.How can I place an order for LTC1867AIGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867AIGN#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 LTC1867AIGN#PBF reliable?
The price and inventory of LTC1867AIGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867AIGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1867AIGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867AIGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867AIGN#PBF?
LTC1867AIGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867AIGN#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 LTC1867AIGN#PBF?
For technical support, including LTC1867AIGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867AIGN#PBF requirements.
6.How does Aetrix verify that LTC1867AIGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1867AIGN#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 LTC1867AIGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1867AIGN#PBF?
All LTC1867AIGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867AIGN#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 LTC1867AIGN#PBF part is unused and in its original packaging.
Return procedure for LTC1867AIGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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