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Analog Devices Inc. LTC1867LIGN#WPBF
- Part No.:
- LTC1867LIGN#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867LIGN#WPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,204
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Product details
Overview
LTC1867LIGN#WPBF from Analog Devices is a 16-bit, 175ksps micropower successive-approximation ADC with integrated 1.25V reference, 8-channel analog multiplexer supporting true differential or single-ended inputs, and SPI/MICROWIRE serial interface - used in automotive-grade data acquisition systems requiring high DC accuracy and low power.
For engineers reviewing the LTC1867LIGN#WPBF datasheet, LTC1867LIGN#WPBF pinout, LTC1867LIGN#WPBF application, or LTC1867LIGN#WPBF equivalent, key selection factors include ±3LSB INL over temperature, AEC-Q100 qualification, 750µA active current at 175ksps, 16-pin narrow SSOP package, and support for unipolar (0–2.5V) or bipolar (±1.25V) conversion modes.
Technical Context
The LTC1867LIGN#WPBF implements a capacitive SAR architecture with internal 1.25V bandgap reference and precision reference amplifier delivering 2.5V at REFCOMP. Its 8-channel MUX supports configurable input pairing (e.g., CH0/CH1 differential, CH7/COM common-mode), with simultaneous sampling of "+" and "–" inputs to preserve phase integrity.
Conversion timing is governed by an internally trimmed clock (3.2µs typical conversion time, 3.7µs max), and automatic nap mode reduces current to 170µA between conversions. Digital interface uses CS/CONV rising edge to initiate conversion, followed by SCK-synchronized output on SDO in straight binary (unipolar) or two's complement (bipolar) format.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over full temperature range - guarantees monotonicity and full code coverage in precision measurement. |
| INL (Integral Nonlinearity) | ±3 LSB max over –40°C to +85°C - enables accurate absolute voltage measurement without calibration across automotive operating range. |
| Sample Rate | 175 ksps guaranteed - supports real-time monitoring of fast transients in motor control or battery cell sensing. |
| Supply Current | 750 µA at 175 ksps, 300 µA at 50 ksps - enables multi-channel acquisition in battery-powered automotive ECUs with minimal thermal impact. |
| Analog Input Range | 0 V to 2.5 V (unipolar) or ±1.25 V (bipolar) - matches standard sensor output ranges and allows direct connection to bridge-based transducers. |
| Reference | Internal 1.25 V ±15 mV (±1.2%) with ±20 ppm/°C tempco - provides stable scaling without external reference, while VREF pin allows overdrive for improved accuracy. |
| Package | 16-pin narrow SSOP (GN), –40°C to +85°C - meets space-constrained automotive PCB layouts and AEC-Q100 reliability requirements. |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN), 0.15mm lead pitch, body size 4.9 × 6.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH6 (Pins 1–7) | Analog input channel (positive) | Accept single-ended or differential inputs; each can be paired with CH7/COM or adjacent channel per configuration word. |
| CH7/COM (Pin 8) | Configurable analog terminal | Functions as eighth channel (CH7) or common-mode input (COM) for differential pairs - selected via COM bit in DIN word. |
| VDD (Pin 16) | Power supply | 2.7 V to 3.6 V analog/digital supply; requires 10 µF + 0.1 µF bypassing - powers internal reference, SAR core, and digital I/O. |
| GND (Pin 15) | Analog and digital ground | Single-point reference for all analog signals and digital logic - must be connected to low-impedance system ground plane. |
| SDI (Pin 14) | Serial data input | Receives 7-bit configuration word (SD/OS/S1/S0/COM/UNI/SLP) to select channel, polarity, and sleep mode before next conversion. |
| SDO (Pin 13) | Serial data output | Outputs 16-bit result after conversion: straight binary (unipolar) or two's complement (bipolar); tri-state when CS/CONV high. |
| SCK (Pin 12) | Serial clock input | Up to 20 MHz clock synchronizes both DIN and DOUT transfers - falling edge captures SDI, rising edge samples SDO. |
| CS/CONV (Pin 11) | Chip select / conversion trigger | Rising edge initiates conversion; low level enables serial port - dual function eliminates need for separate control lines. |
| VREF (Pin 10) | Internal reference output / external reference input | 1.25 V buffered output; 3 kΩ series resistor allows overdrive with external reference for improved drift and accuracy. |
| REFCOMP (Pin 9) | Reference buffer output | 2.5 V (2× VREF) output for driving external circuitry; requires 10 µF + 0.1 µF bypassing - critical for noise-sensitive applications. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified (–40°C to +85°C) | Validated for automotive electronics including engine control, battery management, and ADAS sensor interfaces. |
| True differential input capability | Rejects common-mode noise up to 112 dB at 100 kHz - essential for noisy vehicle electrical environments. |
| Automatic nap mode | Reduces current from 750 µA to 170 µA between conversions - extends battery life in portable diagnostic tools. |
| On-chip 1.25 V reference with ±20 ppm/°C drift | Eliminates external reference component count while maintaining <0.02% full-scale error over temperature. |
| Configurable unipolar/bipolar operation | Supports both 0–2.5 V sensor outputs and ±1.25 V differential transducer signals without external signal conditioning. |
| SPI/MICROWIRE-compatible serial interface | Uses only four wires (CS/CONV, SCK, SDI, SDO) - simplifies isolation and reduces PCB routing complexity in safety-critical systems. |
Applications
| Automotive Battery Cell Monitoring | Industrial Process Control Loop |
|---|---|
|
Use Scenario: Real-time voltage and temperature sampling across 8 lithium-ion cells in EV battery packs under vibration and wide temperature swings. IC Role / Device Role / Timing Role: 16-bit ADC digitizes cell voltages with ±3 LSB INL to detect subtle state-of-charge deviations and prevent overvoltage conditions. Use Value: AEC-Q100 qualification ensures reliability in harsh under-hood environments; 750 µA active current minimizes self-heating during continuous monitoring. |
Use Scenario: High-accuracy pressure, flow, and temperature measurement in PLC-based factory automation systems with 4–20 mA loop integration. IC Role / Device Role / Timing Role: Configurable 8-channel MUX acquires signals from multiple sensors simultaneously, supporting both unipolar (4–20 mA derived) and bipolar (bridge transducer) inputs. Use Value: Internal 1.25 V reference eliminates calibration drift; ±1.25 V bipolar range directly interfaces with strain-gauge bridges without external amplification. |
| Portable Medical Diagnostic Equipment | Motor Drive Current Sensing |
|
Use Scenario: Low-power ECG and bio-potential acquisition in handheld patient monitors requiring long battery life and clinical-grade linearity. IC Role / Device Role / Timing Role: True differential inputs reject 50/60 Hz mains interference; 175 ksps sample rate captures transient cardiac events without aliasing. Use Value: Automatic nap mode cuts average current to ~300 µA at 50 ksps - extends runtime in Class II medical devices powered by coin-cell batteries. |
Use Scenario: Isolated phase-current feedback in BLDC motor inverters, where precise current reconstruction enables field-oriented control. IC Role / Device Role / Timing Role: Simultaneous sampling of shunt voltage pairs (e.g., CH0/CH1) preserves current vector timing integrity across PWM cycles. Use Value: 1.68 µs acquisition time ensures accurate capture within short PWM dead times; 112 dB channel-to-channel isolation prevents crosstalk between phases. |
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, 250 ksps, SPI interface, no internal reference - requires external 2.5 V reference; consumes 1.7 mA at full speed. | Higher throughput but higher power; lacks AEC-Q100 rating and integrated reference - unsuitable for automotive without added components. | Select when >175 ksps is required and external reference infrastructure already exists; avoid for space- or power-constrained automotive designs. |
| ADS8684IPWR | 16-bit, 100 ksps, integrated 4.096 V reference, SPI, 2.7–5.25 V supply - no differential input support; only pseudo-differential channels. | Lower sample rate and no true differential mode limit use in high-noise motor control; wider supply range eases system integration. | Prefer for industrial PLCs needing higher reference voltage and simpler unipolar-only signal chains; not viable for bipolar transducer interfaces. |
Compared with AD7682BCPZ-RL7 and ADS8684IPWR, the LTC1867LIGN#WPBF uniquely combines AEC-Q100 qualification, true differential inputs, integrated 1.25 V reference, and 750 µA active current - making it the only drop-in solution for automotive battery monitoring and isolated current sensing where board area, power, and qualification are co-constrained.
Availability
LTC1867LIGN#WPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial process control, and portable medical diagnostics requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for LTC1867LIGN#WPBF 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 LTC1867LIGN#WPBF belongs to the LTC® micropower SAR ADC product line, designed specifically for space- and power-constrained applications demanding high DC accuracy, robust noise immunity, and automotive reliability - including battery monitoring, sensor fusion, and portable instrumentation.
FAQ
What is the operating temperature range for the LTC1867LIGN#WPBF?
The LTC1867LIGN#WPBF is rated for –40°C to +85°C and is AEC-Q100 qualified for automotive applications. All key specifications - including ±3 LSB INL, 175 ksps sample rate, and 750 µA supply current - are guaranteed across this full range. The "I" grade designation and "W" suffix confirm its automotive qualification status.
Does the LTC1867LIGN#WPBF support true differential input mode?
Yes, the LTC1867LIGN#WPBF supports true differential inputs via configurable channel pairing (e.g., CH0/CH1, CH2/CH3) with simultaneous sampling of both inputs. This is implemented in hardware using a differential sample-and-hold circuit and is validated by 112 dB channel-to-channel isolation at 100 kHz - a specification explicitly measured and guaranteed for the LTC1867LIGN#WPBF.
Can the LTC1867LIGN#WPBF operate without an external reference?
Yes, the LTC1867LIGN#WPBF includes a factory-trimmed 1.25 V internal reference with ±20 ppm/°C tempco and ±15 mV initial accuracy. It drives VREF (Pin 10) and is amplified to 2.5 V at REFCOMP (Pin 9). No external reference is required for basic operation, though VREF can be overdriven for improved performance.
What is the minimum acquisition time required for accurate sampling on the LTC1867LIGN#WPBF?
The LTC1867LIGN#WPBF specifies a minimum acquisition time of 2.01 µs at VDD = 2.7 V for full 16-bit accuracy. This value is guaranteed over temperature and applies to both unipolar and bipolar modes. The internal timing automatically enforces this during nap mode, ensuring valid conversions without external timing control.
How does the LTC1867LIGN#WPBF enter and exit sleep mode?
The LTC1867LIGN#WPBF enters sleep mode when the SLP bit in the 7-bit configuration word is set to '1'. It draws only 0.2 µA in sleep mode. Wake-up requires 80 ms (t7) after CS/CONV is asserted - a delay specified in the datasheet and verified across temperature. The first conversion after wake-up must be discarded; subsequent conversions are valid.
Is the LTC1867LIGN#WPBF pin-compatible with other members of the LTC1863L/LTC1867L family?
Yes, the LTC1867LIGN#WPBF is pin-compatible with LTC1863LIGN#WPBF, LTC1867LCGN#PBF, and all other variants in the LTC1863L/LTC1867L family. This includes identical pin functions, package outline (16-lead narrow SSOP), and footprint - enabling design reuse across 12-bit and 16-bit versions, commercial and automotive grades.
LTC1867LIGN#WPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 175k
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867LIGN#WPBF FAQ
1.How can I place an order for LTC1867LIGN#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867LIGN#WPBF 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 LTC1867LIGN#WPBF reliable?
The price and inventory of LTC1867LIGN#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867LIGN#WPBF is usually 5 days.
3.What payment methods are accepted for LTC1867LIGN#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867LIGN#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867LIGN#WPBF?
LTC1867LIGN#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867LIGN#WPBF 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 LTC1867LIGN#WPBF?
For technical support, including LTC1867LIGN#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867LIGN#WPBF requirements.
6.How does Aetrix verify that LTC1867LIGN#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867LIGN#WPBF 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 LTC1867LIGN#WPBF meets industry standards.
7.What is the process for return or replacement of LTC1867LIGN#WPBF?
All LTC1867LIGN#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867LIGN#WPBF, 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 LTC1867LIGN#WPBF part is unused and in its original packaging.
Return procedure for LTC1867LIGN#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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