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Analog Devices Inc. LTC1198-2BCS8#TRPBF
- Part No.:
- LTC1198-2BCS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1198-2BCS8#TRPBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,273
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Product details
Overview
LTC1198-2BCS8#TRPBF from Analog Devices (formerly Linear Technology) is an 8-bit, 750kHz sampling analog-to-digital converter with integrated 2-channel multiplexer and auto-shutdown mode. It operates from a single 5V supply, consumes 50mW active power and draws only 1nA in shutdown, and features 3-wire serial I/O in an SO-8 package. It is used in high-speed data acquisition for disk drives and portable instrumentation.
For engineers reviewing the LTC1198-2BCS8#TRPBF datasheet, LTC1198-2BCS8#TRPBF pinout, LTC1198-2BCS8#TRPBF application, or LTC1198-2BCS8#TRPBF equivalent, key selection criteria include its 750kHz max sampling rate at 5V, ±1/2LSB total unadjusted error over temperature, software-selectable MUX configuration, 1nA shutdown current, and SO-8 footprint compatibility with board space-constrained embedded systems.
Technical Context
The LTC1198-2BCS8#TRPBF implements a switched-capacitor successive approximation ADC architecture with on-chip sample-and-hold and a 2-channel analog multiplexer. Its conversion timing is synchronized to an external clock, requiring 8.5 clock cycles per conversion at maximum speed.
Digital interface uses a 4-wire protocol (CS/SHUTDOWN, CLK, DIN, DOUT) where a START bit initiates configuration of MUX mode (single-ended vs differential), channel selection (CH0 or CH1), and sign/odd-bit handling before conversion result output. The CS pin doubles as shutdown control: logic HIGH disconnects internal power, reducing ICC to 1nA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes for precise quantization of analog signals. |
| Max Sampling Rate | 750kHz at VCC = 5V - supports real-time digitization of signals up to ~375kHz Nyquist bandwidth. |
| Total Unadjusted Error | ±1/2 LSB over temperature - ensures monotonicity and no missing codes without calibration. |
| Supply Current (Active) | 11mA at 5V - enables low-power system design while sustaining full-speed operation. |
| Shutdown Current | 1nA typical - allows microamp-level system sleep modes between acquisition bursts. |
| Input Span Range | VCC-referenced (no external VREF required) - simplifies layout by eliminating reference buffer components. |
| Effective Bits @ 500kHz | 7 ENOB - confirms usable dynamic range for medium-frequency signal capture (e.g., audio band, sensor outputs). |
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 and power control input | Logic LOW enables conversion and serial interface; logic HIGH forces full shutdown (1nA ICC). |
| 2: CH0 | Analog input channel 0 | Single-ended or differential input node; high-impedance (±1μA leakage) for direct sensor connection. |
| 3: CH1 | Analog input channel 1 | Second analog input for MUX selection; identical electrical characteristics to CH0. |
| 4: GND | Analog ground reference | Must connect directly to analog ground plane to minimize noise coupling into sample-and-hold. |
| 5: DIN | Serial configuration input | Accepts 4-bit command word (START + SGL/DIFF + ODD/SIGN + DUMMY) to configure MUX behavior pre-conversion. |
| 6: DOUT | Serial data output | MSB-first output of 8-bit conversion result; enters Hi-Z state within 120ns after CS↑. |
| 7: CLK | Serial interface clock input | Edge-triggered (rising edge); supports up to 12MHz for 750kHz sampling at 5V. |
| 8: VCC/VREF | Power supply and reference voltage | Serves dual role: powers internal circuitry and defines full-scale input range (0V to VCC). |
Key Features
| Feature | Design Value |
|---|---|
| Auto-shutdown mode | Reduces supply current to 1nA typical when idle, enabling battery-operated systems to extend runtime between conversions. |
| Integrated 2-channel MUX | Allows time-multiplexed sampling of two independent analog sources without external switching components or PCB routing overhead. |
| Single-supply operation | Eliminates need for negative rails or precision external references-full-scale range scales directly with VCC (3V–6V). |
| High-speed serial interface | Supports 12MHz clocking for 750kHz sampling, compatible with HC logic and FPGA I/O without level-shifting. |
| On-chip sample-and-hold | Provides 1MHz full-accuracy input bandwidth, enabling accurate digitization of fast-rising transients without external hold circuitry. |
Applications
| Disk Drive Read Channel | Portable Data Logger |
|---|---|
Use Scenario: Digitizing servo position error signals and head readback waveforms in HDD servo loops. IC Role / Device Role / Timing Role: High-speed ADC capturing 500kHz–750kHz analog feedback for closed-loop motor control and adaptive signal equalization. Use Value: 750kHz sampling rate and 7 ENOB at 500kHz enable accurate reconstruction of PRML read channel waveforms without aliasing. | Use Scenario: Battery-powered environmental sensor node acquiring temperature, pressure, and humidity over extended field deployments. IC Role / Device Role / Timing Role: Low-power ADC performing periodic burst sampling of multiple sensors via its 2-channel MUX, then entering 1nA shutdown between reads. Use Value: Auto-shutdown current of 1nA reduces average system power by >99% during idle intervals, extending battery life to months. |
| Industrial Motor Control Feedback | Medical Ultrasound Front-End |
Use Scenario: Capturing current-sense and encoder signals in compact BLDC motor drives with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-channel ADC sampling phase currents and rotor position simultaneously for field-oriented control algorithms. Use Value: Integrated MUX eliminates external analog switches, reducing BOM count and PCB area while maintaining channel-to-channel timing alignment. | Use Scenario: Digitizing low-amplitude echo return signals in handheld ultrasound probes with strict size and power limits. IC Role / Device Role / Timing Role: High-S/(N+D) ADC converting 200–400kHz RF envelope signals with minimal added noise floor degradation. Use Value: 47dB S/(N+D) at 380kHz (2.7V) and 45dB at 1MHz (5V) preserves weak echo signal integrity for improved image resolution. |
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; SPI-compatible 3-wire interface; no auto-shutdown; 2.5μA standby current | Lacks 1nA shutdown and integrated MUX; requires external reference for full accuracy | Preferred when SPI-native interface is required and ultra-low shutdown current is not critical |
| MAX1112CPE+ | 5V-only supply; 100kSPS; 8-pin PDIP/SO; 2.5μA shutdown; no MUX; external reference required | Lower sampling rate and no channel selection; higher shutdown current than LTC1198-2BCS8#TRPBF | Selected for cost-sensitive industrial controls where 100kSPS suffices and layout simplicity outweighs power savings |
Compared with ADS7822U and MAX1112CPE+, the LTC1198-2BCS8#TRPBF uniquely combines 750kSPS sampling, 2-channel software-configurable MUX, and 1nA shutdown in a single SO-8 package-enabling compact, battery-efficient multichannel acquisition without external support components.
Availability
LTC1198-2BCS8#TRPBF is available at Aetrix Electronics and suitable for disk drive servo systems, portable instrumentation, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1198-2BCS8#TRPBF 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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, industrial, automotive, and communications markets.
The LTC1196/LTC1198 family was designed for compact, high-speed data acquisition in space- and power-constrained systems-emphasizing integration (MUX, sample-and-hold, reference), low active/shutdown current, and simple 3-/4-wire digital interfacing.
FAQ
What is the maximum sampling rate of the LTC1198-2BCS8#TRPBF at 5V supply?
The LTC1198-2BCS8#TRPBF achieves a maximum sampling rate of 750kHz when operated at VCC = 5V and fCLK = 12MHz. This is specified in the AC Characteristics table under "fSMPL(MAX) Maximum Sampling Frequency" for the LTC1198-2B grade. At 2.7V supply, the max rate drops to 287kHz due to reduced internal switching speed.
Does the LTC1198-2BCS8#TRPBF require an external reference voltage?
No, the LTC1198-2BCS8#TRPBF does not require an external reference. Pin 8 (VCC/VREF) serves as both power supply and reference input-its voltage defines the full-scale input range (0V to VCC). This eliminates external reference components and simplifies layout, though accuracy tracks VCC regulation and noise.
How does the auto-shutdown feature work on the LTC1198-2BCS8#TRPBF?
The LTC1198-2BCS8#TRPBF enters auto-shutdown when CS/SHUTDOWN (Pin 1) is driven HIGH. In this state, internal bias circuits are disabled and supply current drops to 1nA typical. Conversion resumes within microseconds upon pulling CS LOW, making it ideal for burst-mode acquisition in battery-powered systems.
What are the analog input voltage limits for the LTC1198-2BCS8#TRPBF?
The analog inputs (CH0 and CH1) of the LTC1198-2BCS8#TRPBF accept voltages from –0.05V to VCC + 0.05V, as specified in the "Analog and REF Input Range" parameter. Exceeding these limits risks latch-up or damage. For safe operation, inputs should be clamped or buffered to remain within 0V to VCC when using VCC-referenced mode.
Can the LTC1198-2BCS8#TRPBF perform differential measurements between CH0 and CH1?
Yes, the LTC1198-2BCS8#TRPBF supports differential input mode. When configured via the DIN command word (SGL/DIFF = 1), it measures the voltage difference (CH0 – CH1) with respect to ground. This mode provides common-mode rejection and is useful for noise-immune sensor interfaces such as bridge-based strain gauges or thermocouples.
LTC1198-2BCS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC1198-2BCS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1198-2BCS8#TRPBF 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#TRPBF reliable?
The price and inventory of LTC1198-2BCS8#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1198-2BCS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1198-2BCS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1198-2BCS8#TRPBF?
LTC1198-2BCS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1198-2BCS8#TRPBF 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#TRPBF?
For technical support, including LTC1198-2BCS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1198-2BCS8#TRPBF requirements.
6.How does Aetrix verify that LTC1198-2BCS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1198-2BCS8#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1198-2BCS8#TRPBF?
All LTC1198-2BCS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1198-2BCS8#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC1198-2BCS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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