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Analog Devices Inc. LTC1198-1ACS8#TRPBF
- Part No.:
- LTC1198-1ACS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1198-1ACS8#TRPBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,115
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Product details
Overview
LTC1198-1ACS8#TRPBF 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, achieves ±1/2 LSB total unadjusted error over temperature, and features auto-shutdown drawing only 1nA typical quiescent current. It targets high-speed data acquisition in compact instrumentation and battery-operated systems.
For engineers reviewing the LTC1198-1ACS8#TRPBF datasheet, LTC1198-1ACS8#TRPBF pinout, LTC1198-1ACS8#TRPBF application, or LTC1198-1ACS8#TRPBF equivalent, key selection criteria include its 750kHz max sampling rate at 5V, SO-8 package compatibility, 3-wire serial interface with DIN for MUX control, shutdown current spec, and differential vs. single-ended input configuration support.
Technical Context
The LTC1198-1ACS8#TRPBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold and a 2-channel analog multiplexer controlled via 4-bit serial DIN command. Its conversion timing is synchronized to an external clock (up to 12MHz), with fixed 8.5-clock-cycle conversion time and 2.5-clock sampling window.
It uses VCC as both supply and reference voltage (no separate VREF pin), supports ground-referenced or differential CH0–CH1 measurements, and enters ultra-low-power shutdown mode when CS is high - disabling internal bias and reducing ICC to 1nA typical without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes with no missing codes guaranteed. |
| Max Sampling Rate | 750kHz at VCC = 5V - enables real-time digitization of signals up to ~375kHz Nyquist bandwidth. |
| Total Unadjusted Error | ±1/2 LSB over temperature - ensures monotonicity and ≤0.2% full-scale absolute accuracy without calibration. |
| Supply Current (Active) | 11mA typical at 5V - corresponds to 50mW power draw, suitable for thermally constrained PCB layouts. |
| Supply Current (Shutdown) | 1nA typical - allows microamp-level system sleep modes without external power gating. |
| Input Configuration | Software-selectable 2-channel MUX - supports single-ended CH0/GND, CH1/GND, or differential CH0–CH1 via DIN command. |
| Serial Interface | 3-wire + DIN (4-wire optional) - requires CS, CLK, DOUT, and DIN for MUX setup; MSB-first, 8-bit result with null bits. |
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 / Shutdown Control | Active-low enable; logic HIGH forces full shutdown (1nA ICC), isolating internal circuitry from VCC. |
| 2: CH0 | Analog Input Channel 0 | Primary analog input; used in single-ended (vs. GND) or differential (vs. CH1) mode per DIN command. |
| 3: CH1 | Analog Input Channel 1 | Secondary analog input; referenced to CH0 in differential mode or to GND in single-ended mode. |
| 4: GND | Analog Ground Reference | Must connect directly to low-impedance analog ground plane; separates analog return from digital noise sources. |
| 5: DIN | Digital Input for MUX Control | Serial 4-bit word (START + SGL/DIFF + ODD/SIGN + DUMMY) configures input channel and polarity before conversion. |
| 6: DOUT | Serial Data Output | MSB-first 8-bit conversion result, preceded by two null bits; tri-states when CS is high. |
| 7: CLK | Serial Shift Clock Input | Edge-triggered master clock (up to 12MHz); controls DIN sampling and DOUT timing alignment. |
| 8: VCC (VREF) | Power Supply & Reference Voltage | Single-pin dual function: powers internal circuitry and sets full-scale range (0V to VCC); requires local 1μF bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-shutdown with 1nA ICC | Eliminates need for external power switches in portable systems; enables wake-on-convert architectures. |
| Integrated 2-channel MUX | Reduces external signal routing complexity and board area versus discrete multiplexing solutions. |
| VCC-as-reference architecture | Removes dedicated reference IC and associated layout sensitivity; simplifies BOM and reduces cost. |
| 600ns conversion time | Supports deterministic timing in closed-loop control systems with sub-microsecond latency requirements. |
| Full-accuracy input bandwidth ≥1MHz | Preserves signal integrity for fast transients without external anti-aliasing filter penalties. |
Applications
| Disk Drive Read Channel Monitoring | Portable Oscilloscope Front-End |
|---|---|
Use Scenario: Real-time monitoring of head-position error signals and servo burst amplitudes during track-following operations. IC Role / Device Role / Timing Role: High-speed digitizer capturing 500kHz–750kHz analog servo waveforms with minimal latency. Use Value: Enables adaptive servo compensation using raw ADC samples, leveraging 750kHz sampling to resolve critical timing margins in HDD actuator control loops. |
Use Scenario: Digitizing analog probe inputs in handheld oscilloscopes with battery life constraints. IC Role / Device Role / Timing Role: Primary ADC in 1-channel, 1Msps-class scope front-end with automatic power cycling between acquisitions. Use Value: 1nA shutdown current extends battery runtime during idle periods; SO-8 footprint minimizes PCB area in space-constrained enclosures. |
| Industrial Sensor Data Logger | Medical Patient Monitor Input Stage |
Use Scenario: Simultaneous sampling of multiple analog sensor outputs (e.g., temperature, pressure, humidity) in field-deployed loggers. IC Role / Device Role / Timing Role: Dual-channel multiplexed ADC acquiring calibrated sensor voltages at programmable intervals. Use Value: Software-configurable MUX eliminates need for external analog switches, reducing component count and failure points in long-life deployments. |
Use Scenario: Digitizing ECG lead signals and respiration transducer outputs in low-power bedside monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC handling differential biopotential inputs with ratiometric rejection of supply ripple. Use Value: ±1/2 LSB TUE ensures clinical-grade amplitude fidelity; VCC-as-reference design inherently rejects common-mode supply noise affecting analog front-end gain stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, serial-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 250kSPS, SPI interface, separate VREF pin, no auto-shutdown (150µA standby) | Lower sampling rate; requires external reference; better suited for precision DC measurements than high-speed transient capture | Select when stable external reference and lower power at reduced speed are prioritized over 750kHz throughput |
| MAX1113EUA+ | 8-bit, 100kSPS, µPower (2.5µA active), SPI, internal reference, no MUX | Orders-of-magnitude lower active current but insufficient speed for >100kHz signals; no channel selection capability | Select for ultra-low-power sensor nodes where sampling rate <100kSPS suffices and MUX functionality is unnecessary |
Compared with ADS7822U and MAX1113EUA+, the LTC1198-1ACS8#TRPBF uniquely combines 750kHz sampling, integrated 2-channel MUX, and 1nA shutdown - making it optimal for compact, battery-powered systems requiring rapid multi-signal acquisition without external support components.
Availability
LTC1198-1ACS8#TRPBF is available at Aetrix Electronics and suitable for disk drive servo systems, portable test equipment, industrial data loggers, and medical patient monitors requiring stable component supply across production lifecycles.
Supply support for LTC1198-1ACS8#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, Inc. (including legacy Linear Technology products) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and instrumentation applications.
The LTC1198-1ACS8#TRPBF belongs to Linear Technology's high-speed, low-power ADC product line, engineered specifically for compact, battery-operated data acquisition systems needing fast sampling without external reference or power management circuitry.
FAQ
What is the maximum clock frequency supported by the LTC1198-1ACS8#TRPBF?
The LTC1198-1ACS8#TRPBF supports a maximum clock frequency of 12.0MHz at VCC = 5V, enabling its full 750kHz sampling rate. At 2.7V operation, the maximum clock drops to 4.6MHz. The device requires precise timing margins - including minimum setup/hold times for CS and DIN - to maintain specification compliance across temperature and voltage ranges.
Does the LTC1198-1ACS8#TRPBF require an external voltage reference?
No, the LTC1198-1ACS8#TRPBF does not require an external voltage reference. Pin 8 (VCC) serves as both power supply and reference input - the full-scale range is 0V to VCC. This eliminates external reference components and simplifies layout, though it ties measurement accuracy directly to VCC stability and noise performance.
How does the 2-channel multiplexer in the LTC1198-1ACS8#TRPBF operate?
The LTC1198-1ACS8#TRPBF's 2-channel MUX is configured via a 4-bit serial word shifted into the DIN pin: START bit followed by SGL/DIFF, ODD/SIGN, and DUMMY bits. It supports three modes - CH0-to-GND, CH1-to-GND, or CH0–CH1 differential - selected dynamically before each conversion without hardware reconfiguration.
What is the significance of the ±1/2 LSB total unadjusted error specification for the LTC1198-1ACS8#TRPBF?
The ±1/2 LSB total unadjusted error (TUE) for the LTC1198-1ACS8#TRPBF guarantees monotonic behavior and limits absolute end-point error to ≤0.2% of full scale across the entire operating temperature range (0°C to 70°C). This eliminates need for system-level calibration in applications where relative accuracy and code consistency outweigh absolute voltage precision.
Can the LTC1198-1ACS8#TRPBF operate from a 3V supply?
Yes, the LTC1198-1ACS8#TRPBF operates from 2.7V to 6V. At 3V, its maximum sampling rate drops to 287kHz and active supply current reduces to 2.0mA typical (6.0mA max), while shutdown current remains 1nA. Performance trade-offs include reduced S/(N+D) and effective bits at higher input frequencies compared to 5V operation.
LTC1198-1ACS8#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:
- -
LTC1198-1ACS8#TRPBF FAQ
1.How can I place an order for LTC1198-1ACS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1198-1ACS8#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 LTC1198-1ACS8#TRPBF reliable?
The price and inventory of LTC1198-1ACS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1198-1ACS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1198-1ACS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1198-1ACS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1198-1ACS8#TRPBF?
LTC1198-1ACS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1198-1ACS8#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 LTC1198-1ACS8#TRPBF?
For technical support, including LTC1198-1ACS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1198-1ACS8#TRPBF requirements.
6.How does Aetrix verify that LTC1198-1ACS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1198-1ACS8#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 LTC1198-1ACS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1198-1ACS8#TRPBF?
All LTC1198-1ACS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1198-1ACS8#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 LTC1198-1ACS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1198-1ACS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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