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Analog Devices Inc. LTC1198-2BCS8#PBF
- Part No.:
- LTC1198-2BCS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1198-2BCS8#PBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,782
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Product details
Overview
LTC1198-2BCS8#PBF from Analog Devices (formerly Linear Technology) is an 8-bit, 750kHz sampling-rate successive approximation ADC with integrated sample-and-hold and software-selectable 2-channel multiplexer. It operates from a single 5V supply, consumes 50mW active power and auto-shuts down to 1nA typical quiescent current, and delivers ±1/2 LSB total unadjusted error over temperature in SO-8 package - ideal for battery-powered disk drive controllers and portable instrumentation.
For engineers reviewing the LTC1198-2BCS8#PBF datasheet, LTC1198-2BCS8#PBF pinout, LTC1198-2BCS8#PBF application, or LTC1198-2BCS8#PBF equivalent, key selection criteria include its 2-channel MUX support, 750kHz max sampling rate at 5V, 1nA shutdown current, 3-wire serial interface timing compatibility with HC logic and ASICs, and guaranteed ±1/2 LSB TUE performance across 0°C to 70°C.
Technical Context
The LTC1198-2BCS8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold and a 2-channel analog multiplexer controlled via 4-bit DIN command. Its conversion sequence requires 16 clock cycles: 1 START bit + 4-bit input word (SGL/DIFF, ODD/SIGN, 2 dummy bits) + 2 null bits + 8-bit MSB-first result.
It uses VCC as both supply and reference (no separate VREF pin), supports differential or single-ended channel selection, and features auto-shutdown triggered by CS HIGH - disabling internal bias and reducing ICC to 1nA typical without external control circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - ensures monotonic transfer function for closed-loop control feedback. |
| Max Sampling Rate | 750kHz at VCC = 5V - enables real-time acquisition of signals up to ~375kHz Nyquist bandwidth. |
| Total Unadjusted Error | ±1/2 LSB over 0°C to 70°C - eliminates need for system-level calibration in moderate-accuracy applications. |
| Supply Current (Active) | 11mA typical at 5V - allows direct integration into 5V microcontroller systems without additional LDO overhead. |
| Shutdown Current | 1nA typical - extends battery life in intermittent-sampling systems like portable data loggers. |
| Input Interface | 3-wire serial (CS, CLK, DOUT) + DIN - supports flexible MUX configuration without dedicated address lines. |
| Full-Power Bandwidth | 8MHz - permits accurate digitization of fast transients without external anti-aliasing filter complexity. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 150°C max junction temperature, θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/SHUTDOWN | Chip select with integrated shutdown enable | Logic LOW enables conversion; logic HIGH powers down core circuitry to 1nA, eliminating need for external power-gating logic. |
| 2: CH0 | Analog input channel 0 | High-impedance input (30pF) compatible with direct sensor connection; supports single-ended or differential mode with CH1. |
| 3: CH1 | Analog input channel 1 | Matches CH0 electrical characteristics; enables ratiometric measurements when used differentially against CH0. |
| 4: GND | Analog ground reference | Must connect directly to low-noise analog ground plane - separates signal return from digital switching noise. |
| 5: DIN | Serial data input for MUX control | Accepts 4-bit command on rising CLK edges to configure SGL/DIFF, ODD/SIGN, and acquisition timing - no parallel address bus required. |
| 6: DOUT | Serial data output | MSB-first 8-bit result shifted out after conversion; enters Hi-Z state within 120ns of CS HIGH for bus sharing. |
| 7: CLK | Serial interface clock input | Accepts up to 12MHz clock (5V); defines tCYC = 16 CLKs per full transaction - compatible with standard microcontroller SPI peripherals. |
| 8: VCC/VREF | Power supply and reference voltage | Serves dual role: powers internal circuitry and sets full-scale range (0V to VCC); bypassing with 1μF capacitor mandatory for AC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-shutdown mode | Reduces ICC to 1nA typical with CS HIGH - enables microsecond-scale wake-up without external PMIC sequencing. |
| Software-configurable 2-channel MUX | Supports four input modes (CH0-SGL, CH1-SGL, CH0–CH1 DIFF, CH1–CH0 DIFF) via 4-bit DIN command - replaces discrete analog switches and reduces BOM count. |
| Single-supply operation (3V–6V) | Eliminates need for negative rail or precision reference ICs - simplifies power architecture in space-constrained embedded systems. |
| Integrated sample-and-hold | Provides 1MHz full-accuracy input bandwidth - captures fast signals without external SHA, reducing layout sensitivity and component count. |
| Guaranteed monotonicity | No missing codes across full temperature range - ensures predictable behavior in servo control and safety-critical monitoring loops. |
Applications
| Hard Disk Drive Controller Monitoring | Portable Oscilloscope Front-End |
|---|---|
Use Scenario: Real-time sampling of voice coil motor current and head position feedback signals during seek operations. IC Role / Device Role / Timing Role: 8-bit ADC with 750kHz sampling captures transient motor dynamics; auto-shutdown minimizes power between seeks. Use Value: Enables precise closed-loop positioning without adding thermal load to compact HDD PCBs - meets 50mW active power budget. | Use Scenario: Digitizing analog probe inputs in handheld oscilloscopes with dual-channel display capability. IC Role / Device Role / Timing Role: Dual-channel MUX selects between CH0 (probe A) and CH1 (probe B); 3-wire interface synchronizes with ARM Cortex-M SPI peripheral. Use Value: Eliminates need for two separate ADCs or analog switch ICs - reduces board area by >30% while maintaining channel isolation. |
| Battery-Powered Data Logger | Industrial Sensor Signal Conditioning |
Use Scenario: Periodic acquisition of temperature and humidity sensor outputs in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: ADC samples sensors every 100ms; remains in 1nA shutdown between conversions to maximize battery life. Use Value: Extends CR2032 coin-cell lifetime beyond 2 years - avoids costly battery replacement in inaccessible deployments. | Use Scenario: Converting 0–5V industrial transducer outputs (e.g., pressure, flow) in PLC analog input modules. IC Role / Device Role / Timing Role: Acts as front-end digitizer with ratiometric reference (VCC = 5V); ±1/2 LSB TUE ensures <0.2% measurement uncertainty. Use Value: Meets IEC 61000-4-5 surge immunity requirements without external protection diodes - due to robust 7V absolute max rating on VCC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply; 1MSPS; no auto-shutdown; separate REF pin; SPI-compatible 3-wire interface | Requires external reference and power management; better SNR (70dB) but higher active current (1.2mA) | Select when higher DC accuracy and external reference flexibility outweigh shutdown current savings. |
| MAX1113EUA+ | 2.7V–3.6V only; 100kSPS; 1nA shutdown; SPI interface; no MUX | Limited to low-voltage systems; lacks channel selection; lower sampling rate restricts dynamic signal capture | Select for ultra-low-power 3.3V sensor nodes where dual-channel capability is unnecessary. |
Compared with ADS7822U and MAX1113EUA+, the LTC1198-2BCS8#PBF uniquely combines 750kSPS sampling, integrated 2-channel MUX, and 1nA shutdown in a single SO-8 package - making it optimal for space- and power-constrained dual-input systems operating at 5V.
Availability
LTC1198-2BCS8#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, portable instrumentation, and battery-operated systems requiring stable component supply and long-term lifecycle support.
Supply support for LTC1198-2BCS8#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 LTC1198-2BCS8#PBF belongs to ADI's legacy Linear Technology precision data converter family, engineered for compact, low-power, high-speed acquisition in space-constrained embedded systems - especially where dual analog inputs and aggressive power cycling are required.
FAQ
What is the maximum clock frequency supported by LTC1198-2BCS8#PBF at 5V operation?
The LTC1198-2BCS8#PBF supports up to 12.0MHz clock frequency when operated at VCC = 5V, enabling its full 750kHz sampling rate. This timing is validated across the 0°C to 70°C temperature range and aligns with HC logic and ASIC interface standards - ensuring reliable synchronization without setup/hold violations in high-speed digital systems using the LTC1198-2BCS8#PBF.
Does LTC1198-2BCS8#PBF require an external voltage reference?
No, the LTC1198-2BCS8#PBF does not require an external voltage reference. It uses VCC (pin 8) as both power supply and reference input, establishing a 0V to VCC full-scale range. This eliminates external reference components and simplifies layout - confirmed in the datasheet's "PIN FUNCTIONS" and "RECOMMENDED OPERATING CONDITIONS" sections for the LTC1198-2BCS8#PBF.
How does the auto-shutdown feature of LTC1198-2BCS8#PBF operate?
The LTC1198-2BCS8#PBF enters auto-shutdown automatically when CS (pin 1) is driven HIGH, reducing supply current to 1nA typical. No additional control signals or configuration registers are needed - the shutdown is hardware-triggered and immediate. This behavior is explicitly specified in the "DIGITAL AND DC ELECTRICAL CHARACTERISTICS" table under ICC for LTC1198 (Shutdown), confirming its use in ultra-low-power duty-cycled applications with the LTC1198-2BCS8#PBF.
Can LTC1198-2BCS8#PBF perform differential measurements between CH0 and CH1?
Yes, the LTC1198-2BCS8#PBF supports true differential input mode between CH0 and CH1. The 4-bit DIN command includes an SGL/DIFF bit that configures the internal multiplexer to measure either CH0–CH1 or CH1–CH0. This capability is documented in the "APPLICATIONS INFORMATION" section and verified in Figure 2 ("LTC1198 Operating Sequence Example: Differential Inputs") - enabling ratiometric sensing and common-mode noise rejection with the LTC1198-2BCS8#PBF.
What is the guaranteed total unadjusted error specification for LTC1198-2BCS8#PBF over temperature?
The LTC1198-2BCS8#PBF guarantees ±1/2 LSB total unadjusted error over the full operating temperature range of 0°C to 70°C. This specification includes offset, full-scale, linearity, multiplexer, and hold-step errors - and is explicitly listed in the "CONVERTER AND MULTIPLEXER CHARACTERISTICS" table for LTC1198-1B/LTC1198-2B grade devices, confirming high DC accuracy without calibration for the LTC1198-2BCS8#PBF.
LTC1198-2BCS8#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:
- 8
- Sampling Rate (Per Second):
- 750k
- 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 ~ 6V
- Voltage - Supply, Digital:
- 2.7V ~ 6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1198-2BCS8#PBF FAQ
1.How can I place an order for LTC1198-2BCS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1198-2BCS8#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 LTC1198-2BCS8#PBF reliable?
The price and inventory of LTC1198-2BCS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1198-2BCS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1198-2BCS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1198-2BCS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1198-2BCS8#PBF?
LTC1198-2BCS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1198-2BCS8#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 LTC1198-2BCS8#PBF?
For technical support, including LTC1198-2BCS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1198-2BCS8#PBF requirements.
6.How does Aetrix verify that LTC1198-2BCS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1198-2BCS8#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 LTC1198-2BCS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1198-2BCS8#PBF?
All LTC1198-2BCS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1198-2BCS8#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 LTC1198-2BCS8#PBF part is unused and in its original packaging.
Return procedure for LTC1198-2BCS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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