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Analog Devices Inc. LTC1199LCS8#PBF
- Part No.:
- LTC1199LCS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1199LCS8#PBF.pdf
- Description:
- IC ADC 10BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LTC1199LCS8#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, auto shutdown, and SPI/MICROWIRE-compatible 4-wire serial interface. It features ±1 LSB linearity error, 58dB SNR at 50kHz input, and 2.2mW typical power dissipation - ideal for battery-powered data acquisition in portable instrumentation.
For engineers reviewing the LTC1199LCS8#PBF datasheet, LTC1199LCS8#PBF pinout, LTC1199LCS8#PBF application, or LTC1199LCS8#PBF equivalent, key selection criteria include its 2.7V–4V supply range, software-selectable MUX configuration (single-ended CH0/CH1 or differential CH0–CH1), 250ksps max sampling rate, and MSOP-8 package compatibility with space-constrained embedded sensor interfaces.
Technical Context
The LTC1199LCS8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold and a configurable 2-channel analog multiplexer. Its digital interface uses a synchronous half-duplex 4-wire protocol (CS, CLK, DIN, DOUT), where a 4-bit configuration word (start + SGL/DIFF + ODD/SIGN + dummy) selects input mode and channel prior to conversion.
Operation is optimized for low-voltage micropower systems: supply current scales linearly from 2mA at 250ksps down to sub-µA in auto-shutdown, and analog inputs tolerate 0.2V to VCC+0.05V with ±1µA leakage. The internal reference is tied to VCC, eliminating external reference components while maintaining ±4 LSB gain error over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes with no missing codes guaranteed. |
| Max Sampling Rate | 250ksps at VCC = 2.7V - supports real-time acquisition of audio-band and sensor signals without undersampling. |
| Supply Voltage Range | 2.7V to 4V - enables direct integration with Li-ion single-cell or regulated 3.3V rails without level-shifting. |
| Power Dissipation | 2.2mW typical at full speed - reduces thermal load and extends battery life in portable devices. |
| INL / DNL | ±1 LSB integral nonlinearity, ±1 LSB differential nonlinearity - ensures monotonicity and accurate signal reconstruction. |
| SNR + THD | 58dB S/(N+D), –60dB THD at 50kHz - suitable for precision DC and low-frequency AC measurements. |
| Reference | Internal VCC-referenced - eliminates need for external voltage reference IC or resistor divider. |
Pinout & Package
Package: 8-pin MSOP (MS8), 3mm × 3mm, 0.65mm pitch, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; initiates conversion sequence and controls auto-shutdown entry/exit. |
| 2 CH0 (+IN) | Analog Input Channel 0 | Positive input for single-ended or differential measurement; high-impedance (>1GΩ) sample-and-hold node. |
| 3 CH1 (–IN) | Analog Input Channel 1 | Negative input for differential mode; referenced to GND in single-ended mode; no sample-and-hold. |
| 4 GND | Analog Ground | Primary return path for analog circuitry; must connect directly to low-impedance analog ground plane. |
| 5 DIN | Digital Data Input | Receives 4-bit configuration word (start + SGL/DIFF + ODD/SIGN + dummy) on rising CLK edges. |
| 6 DOUT | Digital Data Output | Serial MSB-first 10-bit result; tri-stated when CS high or during conversion setup. |
| 7 CLK | Serial Clock Input | Synchronizes all data transfers; max 3.5MHz at 2.7V; duty cycle 40%–60% required. |
| 8 VCC | Positive Supply | 2.7V–4V analog/digital supply; also serves as internal reference source for ADC span. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Configurable via 4-bit serial command to measure CH0 vs GND, CH1 vs GND, or CH0 vs CH1 - eliminates external analog switches. |
| Auto Shutdown Power Scaling | Supply current drops linearly with sampling frequency - 800µA at 250ksps, ~1µA at 1Hz - enables ultra-low-duty-cycle sensing. |
| VCC-Referenced Architecture | Eliminates external reference IC and associated noise/accuracy degradation; simplifies BOM and layout for ratiometric sensors. |
| SPI/MICROWIRE-Compatible Interface | 4-wire synchronous protocol requires no glue logic; DIN/DOUT can be wired together for 3-wire operation with bidirectional MCU GPIO. |
| High-Z Analog Inputs | ±1µA input leakage and 20pF on-channel capacitance allow direct connection to high-output-impedance sources (e.g., thermistors, RTDs). |
Applications
| Portable ECG Monitor | Industrial Temperature Sensor Node |
|---|---|
|
Use Scenario: Continuous acquisition of low-amplitude biopotential signals (0.5–5mV) from dry electrodes with minimal power budget. IC Role / Device Role / Timing Role: Primary ADC digitizing differential electrode pairs; MUX selects between lead configurations; auto-shutdown synchronizes with heartbeat-triggered sampling. Use Value: 2.2mW operation extends battery life >7 days; ±1 LSB linearity preserves diagnostic waveform fidelity; VCC-referencing rejects supply ripple common to wearable power rails. |
Use Scenario: Wireless node measuring multiple PT100/RTD bridges in factory-floor HVAC control cabinets. IC Role / Device Role / Timing Role: Dual-channel front-end ADC scanning 4-wire RTD leads; differential mode rejects common-mode noise from 24VDC industrial power. Use Value: Software-configurable MUX replaces discrete analog switches; 250ksps supports oversampling for 16-bit effective resolution; 2.7V operation interfaces directly with energy-harvesting PMIC outputs. |
| Handheld Multimeter | Battery Management System (BMS) Cell Monitor |
|
Use Scenario: Compact DMM requiring simultaneous voltage/current/resistance ranges with autoranging and low standby drain. IC Role / Device Role / Timing Role: Core sampling engine for autoranging front-end; CH0 measures shunt voltage, CH1 measures sense resistor voltage; SPI interface feeds MCU for scaling and display. Use Value: Single-supply 2.7V operation enables coin-cell backup; 10-bit resolution meets Class II accuracy requirements; 58dB SNR suppresses switching noise from internal DC-DC converter. |
Use Scenario: Monitoring individual Li-ion cell voltages (0–4.2V) in 12S BMS with isolated communication and thermal constraints. IC Role / Device Role / Timing Role: Precision cell voltage sampler; differential mode rejects pack-level common-mode transients; auto-shutdown minimizes self-heating during idle periods. Use Value: VCC-referenced design eliminates reference drift errors across temperature; ±4 LSB gain error ensures <10mV absolute accuracy over –40°C to +85°C; MSOP-8 footprint fits tight cell-spacing layouts. |
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 | 2.7V–5.25V supply; 200ksps; SPI-only (no MICROWIRE); no internal MUX; external reference required. | Requires external REF3025 and analog switch for dual-channel use; higher system BOM cost. | Choose when needing tighter gain error (±0.5 LSB) and higher SNR (70dB) at expense of MUX flexibility and reference integration. |
| MAX11100ETE+ | 2.7V–3.6V supply; 500ksps; built-in PGA (0.5×–4×); SPI interface; external reference required. | Supports programmable gain but adds complexity and power; no native differential MUX like LTC1199L. | Choose when amplifying microvolt-level sensor outputs; avoid if MUX simplicity and zero-reference-component design are priorities. |
Compared with ADS7822U and MAX11100ETE+, the LTC1199LCS8#PBF uniquely integrates VCC-referencing and software-selectable 2-channel MUX in an ultra-low-power 2.7V SAR ADC - reducing component count and PCB area while maintaining 10-bit accuracy for compact sensor nodes.
Availability
LTC1199LCS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-operated sensor nodes, and industrial data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1199LCS8#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 LTC1199LCS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, space-constrained embedded systems requiring integrated signal conditioning and simplified reference architecture.
FAQ
What is the maximum clock frequency supported by the LTC1199LCS8#PBF?
The LTC1199LCS8#PBF supports a maximum clock frequency of 3.5MHz when operating at VCC = 2.7V. This limit scales with supply voltage - exceeding it risks timing violations and conversion errors. At 2.7V, the device achieves its rated 250ksps sampling rate using this clock, with tCYC = 16 CLK cycles per conversion. Always maintain 40%–60% duty cycle for reliable operation.
Does the LTC1199LCS8#PBF require an external voltage reference?
No, the LTC1199LCS8#PBF does not require an external voltage reference. Its internal reference is tied directly to the VCC pin, making it inherently ratiometric. This eliminates external reference components and associated errors (drift, noise, layout sensitivity), simplifying design for battery-powered and space-constrained applications where VCC is well-regulated.
How does the MUX configuration work on the LTC1199LCS8#PBF?
The LTC1199LCS8#PBF uses a 4-bit serial configuration word sent on DIN to select input mode: bit 3 (SGL/DIFF) sets single-ended vs differential; bit 2 (ODD/SIGN) selects channel polarity; bit 1 (dummy) extends acquisition time. Valid combinations are CH0–GND, CH1–GND, or CH0–CH1. Configuration occurs before each conversion, enabling dynamic channel switching in firmware.
Can DIN and DOUT be connected to the same MCU GPIO pin?
Yes, DIN and DOUT of the LTC1199LCS8#PBF can be tied together for 3-wire operation. The device drives DOUT low on the 4th falling CLK edge after the start bit, so the MCU must configure the shared pin as output before that edge and switch to input immediately after. This reduces interconnect count and is validated in Linear's application notes for 8051 and ARM Cortex-M interfaces.
What is the guaranteed operating temperature range for the LTC1199LCS8#PBF?
The LTC1199LCS8#PBF is specified for operation from –45°C to +85°C (industrial grade). This range is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the datasheet, and all key specifications - including offset error (±2 LSB), gain error (±4 LSB), and SNR (58dB) - are guaranteed across this full range at VCC = 2.7V.
LTC1199LCS8#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1199LCS8#PBF FAQ
1.How can I place an order for LTC1199LCS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1199LCS8#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 LTC1199LCS8#PBF reliable?
The price and inventory of LTC1199LCS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1199LCS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1199LCS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1199LCS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1199LCS8#PBF?
LTC1199LCS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1199LCS8#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 LTC1199LCS8#PBF?
For technical support, including LTC1199LCS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1199LCS8#PBF requirements.
6.How does Aetrix verify that LTC1199LCS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1199LCS8#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 LTC1199LCS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1199LCS8#PBF?
All LTC1199LCS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1199LCS8#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 LTC1199LCS8#PBF part is unused and in its original packaging.
Return procedure for LTC1199LCS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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