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Analog Devices Inc. LTC1199CMS8#PBF
- Part No.:
- LTC1199CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1199CMS8#PBF.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,959
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Product details
Overview
LTC1199CMS8#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 250ksps successive approximation ADC with integrated 2-channel analog multiplexer, serial SPI/MICROWIRE interface, and auto shutdown. It operates from a single 2.7V supply, draws only 0.8mA at full speed, and features VCC-referenced inputs for ground-referenced or differential measurements. It targets portable data acquisition and low-power sensor interfaces.
For engineers reviewing the LTC1199CMS8#PBF datasheet, LTC1199CMS8#PBF pinout, LTC1199CMS8#PBF application, or LTC1199CMS8#PBF equivalent, key selection criteria include its 2.7V operation, software-selectable MUX configuration, 250ksps sampling rate, 10-bit no-missing-codes resolution, and MSOP-8 package compatibility with space-constrained embedded systems.
Technical Context
The LTC1199CMS8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold and a 4-wire synchronous serial interface (CS, CLK, DIN, DOUT). Its internal MUX allows selection between CH0 (+IN), CH1 (–IN), or their difference - all referenced to VCC, eliminating need for external reference.
Auto shutdown reduces supply current linearly with sampling frequency down to sub-µA standby; conversion timing is fixed at 2.9µs with 16-clock cycle serial transfer. Input leakage is ±1µA, input capacitance is 20pF on selected channel, and digital I/O thresholds scale with VCC (VIH = 1.9V, VIL = 0.45V at 2.7V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, no missing codes - guarantees monotonicity and full-scale linearity for precision measurement. |
| Max Sampling Rate | 250ksps at VCC = 2.7V - supports real-time capture of audio-band and control-loop signals. |
| Supply Voltage | 2.7V to 4V - enables direct battery operation (e.g., single Li-ion or two alkaline cells) without regulation. |
| Supply Current | 0.8mA typical at 250ksps - enables >1-year runtime on coin-cell batteries in duty-cycled systems. |
| Reference | Internally tied to VCC - eliminates external reference IC, simplifies BOM, and ensures ratiometric accuracy vs supply. |
| INL / DNL | ±1 LSB / ±1 LSB - ensures <0.1% end-point linearity error for calibrated sensor interfacing. |
| SNR + THD | 58dB / –60dB at 50kHz - suitable for 9.5 ENOB in industrial monitoring and portable instrumentation. |
Pinout & Package
Package: 8-lead MSOP (MS8), 3mm × 3mm, 0.65mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; initiates conversion and serial transfer; high state forces auto shutdown. |
| 2 CH0 (+IN) | Analog Input Channel 0 | Positive input for single-ended or differential mode; high-impedance (±1µA leakage), 20pF capacitance. |
| 3 CH1 (–IN) | Analog Input Channel 1 | Negative input for differential mode; must remain stable during conversion; no sample-and-hold. |
| 4 GND | Analog Ground | Primary return path for analog circuitry; must connect directly to low-noise analog ground plane. |
| 5 DIN | Digital Input | Receives 4-bit configuration word (start, SGL/DIFF, ODD/SIGN, dummy); SPI/MICROWIRE compatible. |
| 6 DOUT | Digital Output | Serial MSB-first output of 10-bit result; tri-state when CS high; supports DIN/DOUT wire sharing. |
| 7 CLK | Serial Clock Input | Synchronizes all data transfers; max 3.5MHz at 2.7V; timing critical for setup/hold compliance. |
| 8 VCC | Positive Supply | 2.7V–4V single supply; powers analog core, reference, and digital interface; requires local 1µF bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Configurable via 4-bit DIN word to measure CH0–GND, CH1–GND, or CH0–CH1 - enables dual-sensor or differential thermocouple readout. |
| VCC-Referenced Architecture | Eliminates external reference and associated noise/accuracy drift; provides inherent ratiometric performance against supply variation. |
| Auto Shutdown with Linear Power Scaling | Reduces ICC from 0.8mA to sub-µA as sampling rate drops - ideal for event-triggered or burst-mode sensing. |
| 3-Wire Serial Option (DIN/DOUT Shared) | Allows full bidirectional communication over CS, CLK, and single DATA line - saves MCU GPIO and PCB routing. |
| MSOP-8 Footprint Compatibility | Matches industry-standard 8-pin MSOP layout - enables drop-in replacement in space-constrained designs without board rework. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Battery-powered ECG front-end acquiring lead-II voltage at 250ksps with motion artifact rejection. IC Role / Device Role / Timing Role: ADC digitizes differential electrode signal; MUX selects active lead pair; auto shutdown conserves power between heartbeats. Use Value: 10-bit resolution and 58dB SNR support detection of microvolt-level QRS complexes; 2.7V operation extends battery life beyond 12 months. |
Use Scenario: 4–20mA loop-powered transmitter measuring temperature via RTD bridge and compensating for lead resistance. IC Role / Device Role / Timing Role: ADC samples bridge output and reference voltage simultaneously using CH0/CH1 MUX; VCC-referencing rejects supply ripple. Use Value: ±1 LSB INL ensures <0.1% system accuracy; low 0.8mA ICC meets strict loop power budget (<4mA overhead). |
| Smart Building Occupancy Sensors | Low-Power Environmental Data Loggers |
Use Scenario: PIR + ambient light combo sensor in wireless occupancy node, waking only on motion detection. IC Role / Device Role / Timing Role: ADC digitizes analog PIR envelope and photodiode output; auto shutdown holds ICC <1µA between wake events. Use Value: 250ksps sampling captures fast PIR transients; MSOP-8 footprint fits inside compact housing; no external reference reduces component count. |
Use Scenario: Solar-charged soil moisture logger sampling capacitive probe every 10 minutes across seasonal temperature range. IC Role / Device Role / Timing Role: ADC converts probe voltage with CH0–CH1 differential mode rejecting common-mode noise from long cables. Use Value: –45°C to 85°C operating range covers outdoor deployment; ±1µA leakage prevents measurement drift in high-impedance probe circuits. |
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-only interface, no MUX. | Lacks software-selectable MUX and 10-bit resolution; lower accuracy limits use in calibrated systems. | Choose for cost-sensitive, non-critical 8-bit applications where MUX and precision are unnecessary. |
| MAX11100ETE+ | 12-bit resolution, 500ksps, 2.7–3.6V supply, internal reference, no MUX, TDFN-12 package. | Higher resolution and speed but larger footprint and no analog multiplexing; requires external decoupling for reference stability. | Choose when 12-bit accuracy and 500ksps are mandatory, and board space allows TDFN-12; not pin-compatible. |
Compared with ADS7822U and MAX11100ETE+, the LTC1199CMS8#PBF uniquely balances 10-bit precision, integrated 2-channel MUX, ultra-low 0.8mA active current, and MSOP-8 compatibility - making it optimal for battery-operated dual-sensor nodes where size, power, and flexibility are co-constrained.
Availability
LTC1199CMS8#PBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, smart building occupancy detection, and low-power environmental data loggers requiring stable component supply across extended production lifecycles.
Supply support for LTC1199CMS8#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, serving industrial, automotive, communications, and healthcare markets.
The LTC1199CMS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for micropower, multi-channel, serial-interface ADC applications in battery-constrained and space-limited embedded systems.
FAQ
What is the maximum clock frequency supported by the LTC1199CMS8#PBF?
The LTC1199CMS8#PBF supports a maximum clock frequency of 3.5MHz when operating from a 2.7V supply. This limit scales with supply voltage - higher VCC allows faster clocks up to 7.2MHz (at 5V), but the LTC1199CMS8#PBF is rated for 2.7–4V operation, so 3.5MHz is its validated maximum. Exceeding this may cause timing violations or conversion errors.
Does the LTC1199CMS8#PBF require an external voltage reference?
No, the LTC1199CMS8#PBF does not require an external voltage reference. Its reference is internally tied to the VCC pin, enabling true ratiometric operation. This eliminates reference ICs, reduces BOM cost and board area, and ensures measurement accuracy remains proportional to supply voltage - ideal for battery-powered systems with varying VCC.
How does the LTC1199CMS8#PBF implement automatic power-down?
The LTC1199CMS8#PBF automatically enters low-power shutdown whenever the CS pin is held high. During active conversion cycles (CS low), it draws 0.8mA at 250ksps; in shutdown, supply current drops to sub-µA levels. Crucially, current scales linearly with sampling frequency - halving the sample rate halves the average ICC, enabling precise power budgeting in duty-cycled systems.
Can the DIN and DOUT pins of the LTC1199CMS8#PBF be connected together?
Yes, the DIN and DOUT pins of the LTC1199CMS8#PBF can be wired together to implement a true 3-wire serial interface (CS, CLK, DATA). The device asserts control of the shared line on the 4th falling CLK edge after the start bit, allowing bidirectional communication with minimal MCU GPIO usage - provided the host port is configured to switch direction before that edge.
What are the absolute maximum ratings for analog input voltage on the LTC1199CMS8#PBF?
The absolute maximum analog input voltage on the LTC1199CMS8#PBF is GND – 0.3V to VCC + 0.3V per the datasheet. For a 2.7V supply, this means inputs must stay within –0.3V to 3.0V. Exceeding these limits risks latch-up or permanent damage. The recommended operating range is 0V to VCC, supporting unipolar measurements up to full-scale.
LTC1199CMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 450k
- 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:
- 4V ~ 6V
- Voltage - Supply, Digital:
- 4V ~ 6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1199CMS8#PBF FAQ
1.How can I place an order for LTC1199CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1199CMS8#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 LTC1199CMS8#PBF reliable?
The price and inventory of LTC1199CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1199CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1199CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1199CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1199CMS8#PBF?
LTC1199CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1199CMS8#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 LTC1199CMS8#PBF?
For technical support, including LTC1199CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1199CMS8#PBF requirements.
6.How does Aetrix verify that LTC1199CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1199CMS8#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 LTC1199CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1199CMS8#PBF?
All LTC1199CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1199CMS8#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 LTC1199CMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1199CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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