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Analog Devices Inc. LTC1198-1BCS8#PBF
- Part No.:
- LTC1198-1BCS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1198-1BCS8#PBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,496
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Product details
Overview
LTC1198-1BCS8#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 3V–6V supply, consumes only 50mW at 5V, and features auto-shutdown drawing just 1nA typical quiescent current when idle. Designed for high-speed data acquisition in compact systems, it delivers ±1/2 LSB total unadjusted error over temperature and supports ratiometric operation using VCC as reference.
For engineers reviewing the LTC1198-1BCS8#PBF datasheet, LTC1198-1BCS8#PBF pinout, LTC1198-1BCS8#PBF application, or LTC1198-1BCS8#PBF equivalent, key selection considerations include its 2-channel MUX architecture, SO-8 package compatibility, 750kHz max sampling rate at 5V, 1nA shutdown current, and 3-wire serial interface with DIN control for channel selection.
Technical Context
The LTC1198-1BCS8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, enabling full-accuracy input bandwidth up to 1MHz. Its 2-channel MUX allows configurable single-ended or differential conversion between CH0 and CH1, controlled via 4-bit DIN word including START, SGL/DIFF, ODD/SIGN, and DUMMY bits.
It uses a 3-wire serial interface (CS, CLK, DOUT) plus DIN for configuration, requiring precise timing: tCYC = 16 CLK cycles per conversion, tSMPL = 2.5 CLK cycles for analog acquisition, and tdDO = 64ns (typ) from CLK↑ to valid DOUT data at 5V. Shutdown is asserted automatically when CS is HIGH, disconnecting internal power paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - provides 256 discrete output codes for medium-precision measurement tasks. |
| Max Sampling Rate | 750kHz at VCC = 5V - enables real-time capture of signals up to ~375kHz Nyquist bandwidth. |
| Total Unadjusted Error | ±1/2 LSB (B-grade) - ensures monotonicity and no missing codes across full operating temperature range. |
| Supply Current (Active) | 11mA typical at 5V - supports high-speed operation without excessive thermal load in space-constrained designs. |
| Supply Current (Shutdown) | 1nA typical - eliminates battery drain during idle periods in portable instrumentation. |
| Input Voltage Range | 0V to VCC (single-ended) - simplifies signal conditioning by allowing direct connection to ground-referenced sensors. |
| Reference Source | VCC as reference - eliminates need for external voltage reference, reducing BOM count and layout complexity. |
| Interface Protocol | 3-wire serial + DIN - enables flexible channel selection and mode configuration without parallel bus overhead. |
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 / Power Control | LOW enables conversion; HIGH forces auto-shutdown and disconnects internal power, reducing ICC to 1nA. |
| 2: CH0 | Analog Input Channel 0 | Primary single-ended input; used with CH1 for differential measurements or independently for single-ended acquisition. |
| 3: CH1 | Analog Input Channel 1 | Secondary input; paired with CH0 for differential mode or used alone with SGL/DIFF bit set. |
| 4: GND | Analog Ground Reference | Must connect directly to low-impedance analog ground plane to minimize noise coupling into sample-and-hold. |
| 5: DIN | Digital Input for MUX Control | Accepts 4-bit configuration word (START, SGL/DIFF, ODD/SIGN, DUMMY) on rising CLK edges to select channel and mode. |
| 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 | Synchronizes DIN sampling and DOUT shifting; supports up to 12MHz at 5V for 750kHz sampling. |
| 8: VCC/VREF | Power Supply and Reference | Single-pin dual function: powers internal circuitry and defines full-scale range (0V to VCC), enabling ratiometric accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Shutdown Mode | Reduces supply current to 1nA typical when CS is HIGH, eliminating standby power in battery-operated systems. |
| Integrated Sample-and-Hold | Provides full-accuracy input bandwidth up to 1MHz, enabling accurate digitization of fast-rising transients without external components. |
| Software-Selectable 2-Channel MUX | Allows runtime switching between CH0, CH1, or CH1–CH0 differential mode via 4-bit DIN command, supporting flexible sensor interfacing. |
| VCC-as-Reference Architecture | Eliminates need for external reference IC or precision resistor divider, reducing component count and improving system-level ratiometric stability. |
| SO-8 Small-Form-Factor Package | Enables high-density PCB layouts in portable instruments and disk drive electronics where board space is constrained. |
| ±1/2 LSB Total Unadjusted Error (B-grade) | Guarantees monotonic transfer function and predictable code transitions across 0°C to 70°C, simplifying calibration and firmware design. |
Applications
| Portable Instrumentation | Disk Drive Electronics |
|---|---|
Use Scenario: Handheld multimeter acquiring voltage, current, and temperature readings from multiple sensors. IC Role / Device Role / Timing Role: ADC front-end converting analog sensor outputs to digital values for microcontroller processing. Use Value: Auto-shutdown extends battery life between measurements; 2-channel MUX reduces external multiplexer count and PCB area. | Use Scenario: Real-time head position feedback and servo control in HDD actuator systems. IC Role / Device Role / Timing Role: High-speed sampling of position error signals from voice coil motor feedback sensors. Use Value: 750kHz sampling captures rapid head movement dynamics; SO-8 package fits tight mechanical envelopes near actuator arms. |
| Compact Data Acquisition Modules | Low-Power Industrial Sensors |
Use Scenario: USB-connected DAQ module for lab testing with dual analog inputs and minimal host-side processing. IC Role / Device Role / Timing Role: Primary A/D converter handling time-critical analog input streams before USB packetization. Use Value: 3-wire serial interface simplifies FPGA or MCU integration; VCC-as-reference ensures consistent scaling across varying supply conditions. | Use Scenario: Wireless temperature/humidity node transmitting calibrated readings every 10 seconds. IC Role / Device Role / Timing Role: Signal digitizer activated only during measurement burst, then returned to ultra-low-power shutdown. Use Value: 1nA shutdown current prevents measurable battery depletion during 99.9% idle time, enabling multi-year operation on coin cells. |
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 | 8-bit, 200kSPS, SPI interface, no auto-shutdown, requires external reference. | Lacks MUX and ultra-low-power shutdown; suited for lower-speed, fixed-input systems. | Select when lower sampling rate is acceptable and external reference is already present. |
| MAX1110ECUA+ | 8-bit, 100kSPS, 3-wire interface, 2.7V–5.25V supply, no MUX, 1μA shutdown. | Slower sampling and no channel selection; simpler control but less flexible for multi-sensor nodes. | Choose for cost-sensitive, single-input applications where 1μA shutdown suffices and speed is secondary. |
Compared with ADS7822U and MAX1110ECUA+, the LTC1198-1BCS8#PBF uniquely combines 750kSPS sampling, integrated 2-channel MUX, and 1nA shutdown-enabling higher throughput and longer battery life in compact, multi-sensor embedded systems without external reference or power management ICs.
Availability
LTC1198-1BCS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, disk drive electronics, and compact data acquisition modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1198-1BCS8#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 LTC1198-1BCS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for high-speed, low-power, space-constrained applications where integration, accuracy, and supply flexibility are critical.
FAQ
What is the maximum sampling rate of the LTC1198-1BCS8#PBF at 5V supply?
The LTC1198-1BCS8#PBF 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 LTC1198-1B grade. At 2.7V, the maximum drops to 287kHz due to reduced clock frequency limits.
Does the LTC1198-1BCS8#PBF require an external voltage reference?
No, the LTC1198-1BCS8#PBF does not require an external voltage reference. Pin 8 (VCC/VREF) serves as both power supply and reference input, establishing a 0V to VCC full-scale range. This ratiometric architecture simplifies design and improves system-level accuracy when sensor excitation and ADC reference share the same supply rail.
How does the auto-shutdown feature work on the LTC1198-1BCS8#PBF?
The LTC1198-1BCS8#PBF enters auto-shutdown automatically when the CS/SHUTDOWN pin (Pin 1) is driven HIGH. In this state, internal power paths are disconnected, reducing supply current to just 1nA typical. The device remains in shutdown until CS is pulled LOW again, at which point it resumes normal operation after a brief wake-up delay.
What are the analog input configurations supported by the LTC1198-1BCS8#PBF?
The LTC1198-1BCS8#PBF supports three analog input configurations via its 2-channel MUX and DIN control word: single-ended CH0-to-GND, single-ended CH1-to-GND, and differential CH1–CH0. Configuration is selected using the SGL/DIFF bit in the 4-bit DIN word, with ODD/SIGN controlling polarity and sign handling for differential mode.
Is the LTC1198-1BCS8#PBF pin-compatible with other members of the LTC1196/LTC1198 family?
Yes, the LTC1198-1BCS8#PBF is pin-compatible with all other LTC1198 variants (e.g., LTC1198-1ACS8#PBF, LTC1198-2BCS8#PBF) in the SO-8 package. All share identical pinout, electrical interface, and functional behavior. Differences lie only in grade (A/B), speed bin (1/2), and temperature range-ensuring drop-in replacement within the same variant group.
LTC1198-1BCS8#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:
- -
LTC1198-1BCS8#PBF FAQ
1.How can I place an order for LTC1198-1BCS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1198-1BCS8#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 LTC1198-1BCS8#PBF reliable?
The price and inventory of LTC1198-1BCS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1198-1BCS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1198-1BCS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1198-1BCS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1198-1BCS8#PBF?
LTC1198-1BCS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1198-1BCS8#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 LTC1198-1BCS8#PBF?
For technical support, including LTC1198-1BCS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1198-1BCS8#PBF requirements.
6.How does Aetrix verify that LTC1198-1BCS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1198-1BCS8#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 LTC1198-1BCS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1198-1BCS8#PBF?
All LTC1198-1BCS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1198-1BCS8#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 LTC1198-1BCS8#PBF part is unused and in its original packaging.
Return procedure for LTC1198-1BCS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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