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Analog Devices Inc. LTC1199LIS8#PBF
- Part No.:
- LTC1199LIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1199LIS8#PBF.pdf
- Description:
- IC ADC 10BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,053
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Product details
Overview
LTC1199LIS8#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 250ksps successive approximation ADC with integrated 2-channel analog multiplexer, single 2.7V supply operation, and auto shutdown. It features SPI/MICROWIRE-compatible 4-wire serial interface, 2.2mW typical power dissipation at full speed, and MSOP-8 package. It is used in battery-powered data acquisition systems requiring low-power, high-resolution sampling of dual analog signals.
For engineers reviewing the LTC1199LIS8#PBF datasheet, LTC1199LIS8#PBF pinout, LTC1199LIS8#PBF application, or LTC1199LIS8#PBF equivalent, key selection criteria include its 250ksps sampling rate at 2.7V, software-selectable MUX configuration (single-ended CH0/CH1 or differential CH0–CH1), VCC-referenced internal reference, and guaranteed 10-bit no-missing-codes performance across –45°C to 85°C.
Technical Context
The LTC1199LIS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold and on-chip 2:1 analog multiplexer. Its conversion sequence is initiated by CS falling edge, followed by a 4-bit input word (start + SGL/DIFF + ODD/SIGN + dummy) on DIN, then outputs 10-bit MSB-first result on DOUT after two null bits.
It operates exclusively with VCC as reference (no external VREF pin), supports unipolar transfer only, and achieves 58dB SNR and –60dB THD at 50kHz input under 2.7V/2.5V conditions. Power scales linearly with sampling frequency, dropping to sub-µA in shutdown when CS is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, guaranteed no missing codes - ensures monotonicity and full code coverage for precision measurement. |
| Max Sampling Rate | 250ksps at VCC = 2.7V - enables real-time capture of signals up to ~125kHz Nyquist bandwidth. |
| Supply Voltage | 2.7V to 4V - compatible with Li-ion single-cell and low-voltage industrial rails without level-shifting. |
| Power Dissipation | 2.2mW typ at 250ksps - allows continuous sampling in portable instruments with <10µA average current at 1ksps. |
| INL / DNL | ±1 LSB / ±1 LSB max - supports accurate DC measurement and linearity-critical sensor interfacing. |
| Reference | Internal VCC-referenced - eliminates external reference component, simplifies BOM, and enables ratiometric sensing with supply. |
| Operating Temp | –45°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
Package: 8-pin MSOP (3mm × 3mm, 0.65mm pitch), RoHS-compliant, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; high state forces auto shutdown and places DOUT in Hi-Z. |
| 2 CH0 (+IN) | Analog Input Channel 0 | Positive input for single-ended or differential mode; includes sample-and-hold. |
| 3 CH1 (–IN) | Analog Input Channel 1 | Negative input for differential mode; no sample-and-hold - must remain stable during conversion. |
| 4 GND | Analog Ground | Primary return path for analog circuitry; must connect directly to low-impedance analog ground plane. |
| 5 DIN | Digital Input | Receives 4-bit configuration word (start + SGL/DIFF + ODD/SIGN + dummy) after CS fall. |
| 6 DOUT | Digital Output | Serial output of 10-bit conversion result (MSB-first), active only when CS is low and CLK running. |
| 7 CLK | Serial Clock Input | Synchronizes all data transfers; rising edge clocks DIN input and latches DOUT output. |
| 8 VCC | Positive Supply & Reference | Single 2.7V–4V supply; also serves as internal ADC reference voltage source. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Configurable via 4-bit DIN word to measure CH0 vs GND, CH1 vs GND, or CH0 vs CH1 - eliminates external analog switches in dual-sensor systems. |
| VCC-Referenced Conversion | Removes need for external reference IC or resistor divider; enables true ratiometric operation with sensors tied to same supply rail. |
| Auto Shutdown Between Conversions | Reduces ICC from 0.8mA (active) to <3µA (shutdown) - extends battery life in intermittent-sampling applications like condition monitoring. |
| SPI/MICROWIRE-Compatible Interface | Requires no glue logic; supports standard microcontroller SPI peripherals with half-duplex 4-wire or 3-wire (DIN/DOUT tied) configuration. |
| Guaranteed 10-Bit Performance Over Temp | ±1 LSB INL/DNL and 58dB SNR maintained from –45°C to +85°C - suitable for uncalibrated industrial field instrumentation. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature and humidity from two analog sensors. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing conditioned sensor outputs at 1ksps with automatic power cycling between samples. Use Value: 2.2mW active power and sub-µA shutdown current enable multi-year operation on coin-cell batteries. | Use Scenario: PLC analog input module measuring 4–20mA loop signals from pressure and flow transmitters. IC Role / Device Role / Timing Role: Precision front-end ADC performing ratiometric conversion using shared 3.3V supply as reference. Use Value: VCC-referenced architecture eliminates external reference drift errors and reduces component count by one IC. |
| Medical Wearable Biosensors | Automotive Cabin Air Quality Monitors |
Use Scenario: Compact ECG patch acquiring lead-I and lead-II differential signals for arrhythmia detection. IC Role / Device Role / Timing Role: Simultaneous sampling of two electrode pairs via software-configured differential MUX at 250ksps. Use Value: Guaranteed 10-bit linearity and –60dB THD ensure diagnostic-grade signal fidelity without post-processing calibration. | Use Scenario: In-vehicle CO₂ and VOC sensor node operating in wide ambient temperature range. IC Role / Device Role / Timing Role: Dual-channel ADC interfacing NDIR and metal-oxide sensors across –40°C to +85°C. Use Value: Specified performance over full industrial temperature range avoids derating or thermal compensation firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200ksps, 2.7–5.25V supply, SPI interface, SO-8 package | Lacks MUX; lower resolution limits dynamic range for sensor applications requiring >256 steps | Select when cost sensitivity outweighs resolution needs and dual-channel function is handled externally |
| MAX11100ETE+ | 12-bit resolution, 500ksps, 2.7–3.6V supply, internal reference, TDFN-12 package | Higher resolution and speed but larger footprint and no integrated MUX - requires external analog switch for dual inputs | Select when higher ENOB and faster sampling justify added board area and BOM complexity |
Compared with ADS7822U and MAX11100ETE+, the LTC1199LIS8#PBF uniquely integrates a 2-channel MUX with 10-bit accuracy and VCC-referenced operation in an MSOP-8 package - delivering optimal balance of channel flexibility, precision, and space efficiency for dual-sensor embedded systems.
Availability
LTC1199LIS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and automotive cabin monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1199LIS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC1199LIS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-speed, multi-channel sensor digitization in space-constrained and battery-operated systems.
FAQ
What is the maximum clock frequency supported by the LTC1199LIS8#PBF?
The LTC1199LIS8#PBF supports a maximum clock frequency of 3.5MHz when operated at VCC = 2.7V. This clock rate enables the full 250ksps sampling capability. Exceeding 3.5MHz may cause timing violations or degraded AC performance, particularly at temperature extremes. The device's tCYC (total cycle time) is specified as 14–16 clock cycles per conversion, confirming compatibility with standard microcontroller SPI peripherals.
Does the LTC1199LIS8#PBF require an external reference voltage?
No, the LTC1199LIS8#PBF does not require an external reference voltage. It uses VCC as its internal reference source, eliminating the need for external reference components. This design enables true ratiometric operation - ideal for applications where sensor excitation and ADC reference share the same supply rail, such as bridge-based strain gauges or RTD interfaces. The reference input pin (VREF) present on the LTC1197/LTC1197L variants is replaced by direct VCC connection in the LTC1199/LTC1199L family.
How is the analog input channel selected on the LTC1199LIS8#PBF?
The analog input channel on the LTC1199LIS8#PBF is selected via a 4-bit configuration word shifted into the DIN pin after CS goes low. The word consists of a start bit (first logical '1'), followed by SGL/DIFF (single-ended/differential), ODD/SIGN (channel polarity), and a dummy bit. For example, "1000" selects CH0 vs GND in single-ended mode, while "1100" selects CH0–CH1 differential mode. The LTC1199LIS8#PBF does not support hardware pin-strapping - all configuration is software-controlled through the serial interface.
What is the operating temperature range of the LTC1199LIS8#PBF?
The LTC1199LIS8#PBF is rated for operation from –45°C to +85°C. This extended industrial temperature range is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the official datasheet. All key specifications - including INL, DNL, SNR, THD, and supply current - are guaranteed across this full range, making the LTC1199LIS8#PBF suitable for deployment in harsh environments such as factory automation, automotive cabin modules, and outdoor instrumentation without thermal derating.
Can DIN and DOUT be connected to the same microcontroller pin for the LTC1199LIS8#PBF?
Yes, DIN and DOUT can be tied together for 3-wire interface operation with the LTC1199LIS8#PBF. The device drives DOUT low on the 4th falling CLK edge after the start bit, so the microcontroller must configure the shared pin as an output before that edge and switch it to input immediately after. This configuration reduces I/O count and PCB routing complexity. However, bidirectional timing margins must be verified per the tdDO, ten, and tdis specifications - especially at maximum clock rates and temperature extremes.
LTC1199LIS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 210k
- Number of Inputs:
- 1, 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 4V
- Voltage - Supply, Digital:
- 2.7V ~ 4V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1199LIS8#PBF FAQ
1.How can I place an order for LTC1199LIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1199LIS8#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 LTC1199LIS8#PBF reliable?
The price and inventory of LTC1199LIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1199LIS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1199LIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1199LIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1199LIS8#PBF?
LTC1199LIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1199LIS8#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 LTC1199LIS8#PBF?
For technical support, including LTC1199LIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1199LIS8#PBF requirements.
6.How does Aetrix verify that LTC1199LIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1199LIS8#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 LTC1199LIS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1199LIS8#PBF?
All LTC1199LIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1199LIS8#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 LTC1199LIS8#PBF part is unused and in its original packaging.
Return procedure for LTC1199LIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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