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Analog Devices Inc. LTC1197CS8#TRPBF
- Part No.:
- LTC1197CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1197CS8#TRPBF.pdf
- Description:
- IC ADC 10BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,103
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Product details
Overview
LTC1197CS8#TRPBF from Analog Devices (formerly Linear Technology) is a 10-bit, 250ksps successive approximation ADC with differential analog input, external reference support, and auto shutdown in an 8-pin MSOP package. It operates from a single 2.7V supply, draws only 0.8mA at full speed, features SPI/MICROWIRE-compatible 3-wire serial I/O, and targets low-power data acquisition in portable instrumentation.
For engineers reviewing the LTC1197CS8#TRPBF datasheet, LTC1197CS8#TRPBF pinout, LTC1197CS8#TRPBF application, or LTC1197CS8#TRPBF equivalent, key selection criteria include its 2.7V operation, 250ksps sampling rate, ±2 LSB offset error, differential input architecture, and MSOP-8 thermal performance (θJA = 210°C/W).
Technical Context
The LTC1197CS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar conversion only. Its differential input accepts 0V to VCC common-mode range and allows adjustable full-scale spans down to 200mV via external VREF.
It uses a 3-wire serial interface (CS, CLK, DOUT) synchronized on rising CLK edges, outputs 10-bit MSB-first data after two null bits, and enters automatic power-down between conversions-reducing supply current linearly with sample rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, no missing codes guaranteed-ensures monotonicity for control-loop feedback and precision measurement. |
| Max Sampling Rate | 250ksps at VCC = 2.7V-supports audio-band and sensor signal digitization in battery-powered systems. |
| Supply Current | 0.8mA typical at 250ksps-enables >100-hour operation on a 200mAh coin cell when duty-cycled. |
| Offset Error | ±2 LSB max over temperature-translates to ≤±4.9mV error with 2.5V reference, suitable for 12-bit-equivalent system calibration. |
| INL / DNL | ±1 LSB integral nonlinearity, ±1 LSB differential nonlinearity-meets requirements for closed-loop motor control and medical front-ends. |
| Reference Input | 0.2V to VCC + 0.05V range-allows direct connection to precision voltage references or ratiometric sensor bridges. |
| Dynamic Performance | 58dB SNR + distortion at 50kHz input-sufficient for 9.5 ENOB in vibration monitoring and industrial process sensing. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm body, 0.65mm pitch, θJA = 210°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select Input | Active-low enable; high state triggers auto shutdown, reducing current to µA-level leakage. |
| 2 - +IN | Differential Analog Input (+) | High-impedance input (20pF); accepts signals up to VCC; requires low-noise source impedance ≤1kΩ for full accuracy. |
| 3 - –IN | Differential Analog Input (–) | Matches +IN characteristics; enables true differential measurement or single-ended with common-mode rejection. |
| 4 - GND | Analog Ground | Must connect directly to clean analog ground plane-separate from digital ground to minimize noise coupling. |
| 5 - VREF | External Reference Input | Defines full-scale range; supports 0.2V–2.75V span; bypass with 1µF ceramic capacitor required for stability. |
| 6 - DOUT | Serial Data Output | Three-state CMOS output; data valid 130ns after CLK↑; Hi-Z when CS high or during conversion setup. |
| 7 - CLK | Serial Clock Input | Accepts 0.01–3.5MHz clock; timing critical for setup/hold (78ns tsuCS, 40ns thCS); synchronous to data transfer. |
| 8 - VCC | Positive Supply | 2.7V to 4V operation; requires local 0.1µF ceramic + 1µF tantalum bypass to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown power scaling | Supply current drops linearly with sample rate-enables dynamic power budgeting in event-triggered acquisition. |
| Differential input with adjustable span | Supports 200mV–2.7V full-scale ranges-eliminates need for external gain stages in low-level sensor interfaces. |
| SPI/MICROWIRE-compatible interface | 3-wire serial protocol with no glue logic-direct interfacing to MSP430, STM32, or FPGA GPIO with minimal pin count. |
| Low 2.2mW power at 250ksps | 0.8mA @ 2.7V-enables always-on sensing in wearables and IoT edge nodes without thermal derating. |
| Guaranteed 10-bit no-missing-codes | Monotonic transfer function across –40°C to 85°C-critical for position encoders and closed-loop servo control. |
Applications
| Portable ECG Monitor | Industrial Temperature Sensor Node |
|---|---|
|
Use Scenario: Digitizing low-amplitude, high-impedance biopotential signals from dry electrodes with minimal power draw. IC Role / Device Role / Timing Role: Front-end ADC capturing 100Hz–250Hz ECG waveforms with 10-bit resolution and differential rejection of 50/60Hz interference. Use Value: 2.7V operation and 0.8mA active current extend battery life to >7 days on a CR2032; differential input rejects common-mode noise without op-amp buffering. |
Use Scenario: Converting output of RTD or thermistor bridges in remote wireless sensor transmitters. IC Role / Device Role / Timing Role: Precision ratiometric ADC measuring bridge voltage referenced to same excitation source, sampled at 100Hz. Use Value: Adjustable 0.2V–2.7V VREF range matches low-excitation bridge outputs; ±2 LSB offset enables one-point calibration per unit. |
| Handheld Multimeter Front-End | Battery Management System Voltage Monitor |
|
Use Scenario: High-accuracy DC voltage measurement across multiple ranges using programmable gain amplifier + ADC architecture. IC Role / Device Role / Timing Role: Secondary ADC digitizing PGA output with 10-bit resolution and <1µs conversion time for fast auto-ranging. Use Value: 250ksps sampling supports sub-ms range switching; MSOP-8 footprint fits compact handheld PCB layouts. |
Use Scenario: Monitoring individual cell voltages in 3–4S Li-ion packs with microcontroller-based BMS. IC Role / Device Role / Timing Role: Isolated or galvanically referenced ADC sampling cell terminals at 10–50Hz for SOC/SOH calculation. Use Value: 2.7V supply compatibility aligns with LDO-regulated MCU rails; ±1 LSB DNL prevents step errors in voltage threshold detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply, 200ksps, SPI-only interface, no auto shutdown, 1.25mW @ 200ksps | Lacks automatic power scaling; requires external control for low-duty-cycle operation | Choose when SPI timing strictness exceeds LTC1197CS8#TRPBF's 3.5MHz CLK limit or when board space allows SO-8 instead of MSOP-8 |
| MAX11100ETE+ | 2.7V–3.6V supply, 500ksps, internal reference, 1.8mW @ 500ksps, 12-bit resolution | Higher resolution but fixed 2.048V ref; no external VREF pin; larger 16-pin TQFN package | Choose when 12-bit precision is mandatory and external reference flexibility is not required |
Compared with ADS7822U and MAX11100ETE+, the LTC1197CS8#TRPBF uniquely balances ultra-low 2.7V supply operation, auto shutdown scalability, differential input flexibility, and minimal 8-pin MSOP footprint-making it optimal for size- and power-constrained portable instrumentation where reference adaptability matters.
Availability
LTC1197CS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-operated sensors, and compact data loggers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC1197CS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1197CS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for micropower, high-speed, single-supply 10-bit SAR ADC applications in space- and energy-constrained systems.
FAQ
What is the maximum clock frequency supported by the LTC1197CS8#TRPBF?
The LTC1197CS8#TRPBF supports a maximum clock frequency of 3.5MHz when operating from a 2.7V supply. This corresponds to its rated 250ksps sampling rate. Exceeding 3.5MHz may cause timing violations, increased INL/DNL, or conversion failure-verified across the full 0°C to 70°C commercial temperature range per datasheet specifications.
Does the LTC1197CS8#TRPBF require an external reference voltage?
Yes, the LTC1197CS8#TRPBF requires an external reference voltage applied to the VREF pin. It accepts 0.2V to VCC + 0.05V (i.e., up to 4.05V), enabling flexible full-scale adjustment. Unlike some ADCs, it does not include an internal reference, making external precision references essential for absolute accuracy applications.
Can the LTC1197CS8#TRPBF operate with a 3.3V supply?
Yes, the LTC1197CS8#TRPBF is fully specified for operation from 2.7V to 4V, so 3.3V is within its recommended supply range. At 3.3V, typical supply current is ~1.1mA at 250ksps, and clock frequency should be limited to ≤3.5MHz. Logic thresholds scale with VCC, ensuring reliable interface with 3.3V microcontrollers.
What is the meaning of "auto shutdown" in the LTC1197CS8#TRPBF?
"Auto shutdown" means the LTC1197CS8#TRPBF automatically powers down its analog and digital circuitry between conversions when CS remains high, reducing supply current to sub-µA levels. When CS goes low to initiate sampling, it wakes instantly-no startup delay-making it ideal for burst-mode acquisition in energy-harvesting systems.
Is the LTC1197CS8#TRPBF pin-compatible with the LTC1197LCS8?
Yes, the LTC1197CS8#TRPBF and LTC1197LCS8 share identical pinout, package (MSOP-8), and functional interface. The "C" suffix denotes commercial temperature grade (0°C to 70°C), while "L" indicates low-voltage optimization-but both are rated for 2.7V–4V operation and have identical electrical behavior in that range.
LTC1197CS8#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:
- 10
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- 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:
- 4V ~ 9V
- Voltage - Supply, Digital:
- 4V ~ 9V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1197CS8#TRPBF FAQ
1.How can I place an order for LTC1197CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1197CS8#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 LTC1197CS8#TRPBF reliable?
The price and inventory of LTC1197CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1197CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1197CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1197CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1197CS8#TRPBF?
LTC1197CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1197CS8#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 LTC1197CS8#TRPBF?
For technical support, including LTC1197CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1197CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1197CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1197CS8#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 LTC1197CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1197CS8#TRPBF?
All LTC1197CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1197CS8#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 LTC1197CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1197CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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