My Inquiry
My Account
Analog Devices Inc. LTC1198-2ACS8#PBF
- Part No.:
- LTC1198-2ACS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1198-2ACS8#PBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,607
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1198-2ACS8#PBF from Analog Devices (formerly Linear Technology) is an 8-bit, 750kHz sampling successive approximation ADC with integrated sample-and-hold and software-selectable 2-channel analog multiplexer. It operates from a single 2.7V–6V supply, consumes only 50mW at 5V, and auto-shuts down to 1nA quiescent current when idle. Its SO-8 package, 3-wire serial interface, and ±1/2 LSB total unadjusted error over temperature make it suitable for compact, battery-operated data acquisition in disk drives and portable instrumentation.
For engineers reviewing the LTC1198-2ACS8#PBF datasheet, LTC1198-2ACS8#PBF pinout, LTC1198-2ACS8#PBF application, or LTC1198-2ACS8#PBF equivalent, key selection criteria include its 750kHz max sampling rate at 5V, 2-channel MUX configuration, auto-shutdown capability, SO-8 thermal performance (θJA = 175°C/W), and differential vs. single-ended input flexibility per channel selection.
Technical Context
The LTC1198-2ACS8#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. Conversion timing is synchronized to an external clock (up to 12MHz at 5V), with fixed 8.5-clock conversion time and 2.5-clock sampling window.
Its digital interface uses CS/SHUTDOWN as both chip select and power control, DIN for MUX address and mode configuration (single-ended/differential, CH0/CH1), and DOUT for MSB-first serial output. The VCC/VREF pin serves dual purpose-supply rail and reference voltage-enabling ratiometric operation without external reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes guaranteed across full operating range |
| Max Sampling Rate | 750kHz at VCC = 5V; enables real-time capture of signals up to ~375kHz Nyquist bandwidth |
| Total Unadjusted Error | ±1/2 LSB maximum over 0°C to 70°C; ensures monotonicity and simplifies calibration |
| Supply Current (Active) | 11mA typical at 5V, 1Msps; supports high-speed acquisition without excessive thermal load |
| Supply Current (Shutdown) | 1μA typical at 5V; reduces system standby power by >99.9% during idle periods |
| S/(N + D) | 47dB at 500kHz input; sufficient for 7.7 ENOB in medium-bandwidth signal chains |
| Input Voltage Range | 0V to VCC (ratiometric); eliminates need for level-shifting when VCC is used as reference |
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 Input | LOW enables conversion and digital interface; HIGH forces shutdown and disconnects internal power rails |
| 2: CH0 | Analog Input Channel 0 | Single-ended or differential input terminal; high-impedance (>1GΩ) with ≤30pF capacitance |
| 3: CH1 | Analog Input Channel 1 | Second analog input for MUX selection; leakage <±1μA over temperature |
| 4: GND | Analog Ground Reference | Must connect directly to low-noise analog ground plane; separates analog and digital return paths |
| 5: DIN | Digital Input for MUX Configuration | Receives 4-bit command (START + SGL/DIFF + ODD/SIGN + DUMMY) on rising CLK edges |
| 6: DOUT | Serial Data Output | MSB-first 8-bit result with 55ns propagation delay (CLK↑ to valid data); Hi-Z when CS HIGH |
| 7: CLK | Serial Interface Clock Input | Accepts 0.01–12MHz (5V) or 0.01–4.6MHz (2.7V); duty cycle ≥40% required |
| 8: VCC/VREF | Power Supply and Reference Input | Supplies core logic and defines full-scale range; bypassing with 1μF ceramic to GND mandatory |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Shutdown Mode | Reduces supply current to 1nA typical, enabling ultra-low-power sleep states in portable systems |
| Software-Selectable 2-Channel MUX | Configurable per conversion via DIN command-supports CH0, CH1, CH0–CH1 diff, or CH1–CH0 diff |
| Ratiometric Operation | VCC serves as reference; eliminates external reference component and improves supply noise rejection |
| High-Speed Serial Interface | 3-wire (CS, CLK, DOUT) + optional DIN; compatible with HC logic, ASICs, and microprocessor SPI peripherals |
| On-Chip Sample-and-Hold | Full-accuracy input bandwidth of 1MHz; captures fast transients without external hold circuitry |
Applications
| Disk Drive Read Channel Monitoring | Portable Oscilloscope Front-End |
|---|---|
Use Scenario: Real-time monitoring of preamplifier output and servo error signals in HDD head positioning circuits. IC Role / Device Role / Timing Role: Dual-channel sampling ADC acquiring CH0 (preamplifier) and CH1 (position error) at 500kHz for closed-loop feedback. Use Value: 750kHz sampling enables oversampling for noise reduction; auto-shutdown cuts background power between servo bursts. |
Use Scenario: Digitizing analog waveforms in handheld oscilloscopes with limited PCB area and battery life. IC Role / Device Role / Timing Role: Primary ADC capturing CH0 (probe input) and CH1 (trigger reference) with differential mode for common-mode noise rejection. Use Value: SO-8 footprint minimizes board space; 1nA shutdown extends battery runtime during display refresh intervals. |
| Battery-Powered Data Logger | Industrial Sensor Signal Conditioning |
Use Scenario: Periodic acquisition of temperature, pressure, and humidity sensor outputs in remote environmental monitors. IC Role / Device Role / Timing Role: Time-multiplexed sampling of multiple sensors via CH0/CH1, triggered by microcontroller on demand. Use Value: Single-supply 2.7–6V operation matches Li-ion/LiPo battery discharge curve; ±1/2 LSB TUE avoids calibration overhead. |
Use Scenario: Converting outputs from strain gauges and RTDs in PLC I/O modules where EMI immunity is critical. IC Role / Device Role / Timing Role: Differential acquisition (CH0–CH1) rejecting common-mode noise on long sensor cables. Use Value: Ratiometric VCC/VREF operation rejects supply ripple; 47dB S/(N+D) meets industrial 12-bit effective resolution requirements. |
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 | 2.7–5.25V supply; 1MSPS; SPI-compatible 3-wire interface; no auto-shutdown; requires external reference | Lacks integrated shutdown and ratiometric operation; needs external REF and decoupling | Preferred when external precision reference is already present and continuous sampling is required |
| MAX1112CPE+ | 2.7–5.25V supply; 100kSPS; 8-pin PDIP/SO; SPI interface; no MUX; ±1 LSB INL | Lower speed, no channel selection, higher INL; simpler interface but less flexible | Selected for cost-sensitive, low-speed applications where dual-channel capability is unnecessary |
Compared with LTC1198-2ACS8#PBF, ADS7822U offers higher sampling rate but requires external reference and lacks auto-shutdown, while MAX1112CPE+ trades speed and MUX flexibility for lower cost and simpler integration in static-sensing roles.
Availability
LTC1198-2ACS8#PBF is available at Aetrix Electronics and suitable for disk drive monitoring, portable instrumentation, and battery-powered data loggers requiring stable component supply, consistent parametric performance, and long-term production support.
Supply support for LTC1198-2ACS8#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 LTC1198-2ACS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for compact, low-power, high-speed sampling in space-constrained embedded systems.
FAQ
What is the maximum sampling rate of the LTC1198-2ACS8#PBF at 5V supply?
The LTC1198-2ACS8#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 LTC1198-2 variant. At 2.7V, the maximum drops to 287kHz due to reduced clock frequency limits.
Does the LTC1198-2ACS8#PBF require an external reference voltage?
No, the LTC1198-2ACS8#PBF does not require an external reference. Its Pin 8 (VCC/VREF) serves as both power supply and reference input, enabling true ratiometric operation. This eliminates external reference components and improves immunity to supply ripple, as confirmed in the Applications Information section and Pin Functions description.
How does the auto-shutdown feature work on the LTC1198-2ACS8#PBF?
The LTC1198-2ACS8#PBF enters auto-shutdown when CS/SHUTDOWN (Pin 1) is driven HIGH. In this state, internal power rails are disconnected and supply current drops to 1nA typical. The device remains in shutdown until CS falls again, at which point it powers up and performs a new conversion-no reset sequence or initialization is needed.
Can the LTC1198-2ACS8#PBF perform differential measurements between CH0 and CH1?
Yes, the LTC1198-2ACS8#PBF supports differential measurement between CH0 and CH1. As documented in the Pin Functions and Applications Information sections, the 4-bit DIN command includes an SGL/DIFF bit that configures the internal MUX to acquire either single-ended (CH0 or CH1) or differential (CH0–CH1 or CH1–CH0) inputs prior to conversion.
What is the total unadjusted error specification for the LTC1198-2ACS8#PBF over temperature?
The LTC1198-2ACS8#PBF has a total unadjusted error of ±1/2 LSB maximum over the full operating temperature range (0°C to 70°C), as explicitly stated in the Converter and Multiplexer Characteristics table. This includes offset, full-scale, linearity, multiplexer, and hold-step errors-verified for both A-grade and B-grade variants.
LTC1198-2ACS8#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:
- -
LTC1198-2ACS8#PBF FAQ
1.How can I place an order for LTC1198-2ACS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1198-2ACS8#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 LTC1198-2ACS8#PBF reliable?
The price and inventory of LTC1198-2ACS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1198-2ACS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1198-2ACS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1198-2ACS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1198-2ACS8#PBF?
LTC1198-2ACS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1198-2ACS8#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 LTC1198-2ACS8#PBF?
For technical support, including LTC1198-2ACS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1198-2ACS8#PBF requirements.
6.How does Aetrix verify that LTC1198-2ACS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1198-2ACS8#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 LTC1198-2ACS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1198-2ACS8#PBF?
All LTC1198-2ACS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1198-2ACS8#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 LTC1198-2ACS8#PBF part is unused and in its original packaging.
Return procedure for LTC1198-2ACS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1198-2ACS8#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
