My Inquiry
My Account
Analog Devices Inc. LTC1197LCMS8#TRPBF
- Part No.:
- LTC1197LCMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1197LCMS8#TRPBF.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1197LCMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 10-bit, 250ksps successive approximation ADC with differential analog inputs, internal sample-and-hold, and auto shutdown. It operates from a single 2.7V supply, draws only 0.8mA at full speed, and features SPI/MICROWIRE-compatible 3-wire serial I/O. It targets low-power portable instrumentation requiring high resolution and rail-to-rail input capability down to 200mV span.
For engineers reviewing the LTC1197LCMS8#TRPBF datasheet, LTC1197LCMS8#TRPBF pinout, LTC1197LCMS8#TRPBF application, or LTC1197LCMS8#TRPBF equivalent, key selection criteria include its 2.7V operation, 10-bit no-missing-codes resolution, differential input architecture, 250ksps sampling rate, and MSOP-8 package compatibility with space-constrained embedded systems.
Technical Context
The LTC1197LCMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold and programmable reference interface. Its differential input supports ratiometric measurement and direct connection to low-voltage signal sources without gain stages.
It uses a synchronous 3-wire serial interface (CS, CLK, DOUT) compatible with SPI and MICROWIRE protocols. Conversion is initiated by CS falling edge; data is output MSB-first after two null bits, with automatic power-down between conversions to minimize quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - guarantees monotonic transfer function for precision control and measurement loops. |
| Max Sampling Rate | 250ksps at VCC = 2.7V - enables real-time acquisition of audio-band and sensor signals in battery-powered devices. |
| Supply Voltage | 2.7V to 4V - optimized for single-cell Li-ion or dual-cell alkaline systems without LDO overhead. |
| Supply Current | 0.8mA typical at 250ksps - reduces thermal load and extends battery life in portable instrumentation. |
| Analog Input Range | 0V to VCC (differential) - supports direct interfacing with transducers and op-amp outputs referenced to system ground. |
| Reference Input | External VREF pin (0.2V to VCC + 0.05V) - allows flexible scaling from 200mV to 4.05V full-scale for optimized SNR per application. |
| INL / DNL | ±1 LSB / ±1 LSB - ensures accurate linearity for closed-loop feedback and calibration-critical applications. |
Pinout & Package
Package: 8-pin MSOP (3mm × 3mm), moisture sensitivity level 1, RoHS-compliant, rated for –40°C to 85°C industrial temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select Input | Active-low enable; initiates conversion and serial transfer; high state triggers auto shutdown. |
| 2 - +IN | Differential Analog Input (+) | High-impedance input (20pF); accepts signals up to VCC + 0.3V; used with –IN for true differential measurement. |
| 3 - –IN | Differential Analog Input (–) | High-impedance input (20pF); defines common-mode reference; must remain stable during sampling. |
| 4 - GND | Analog Ground | Primary return path for analog circuitry; requires dedicated low-impedance connection to analog ground plane. |
| 5 - VREF | External Reference Input | Defines full-scale range; supports external references from 0.2V to VCC + 0.05V; bypass with 1µF capacitor. |
| 6 - DOUT | Serial Data Output | CMOS-compatible output; MSB-first 10-bit result plus two null bits; tri-stated when CS is high. |
| 7 - CLK | Serial Clock Input | Synchronizes data transfer on rising edge; max 3.5MHz at 2.7V; duty cycle 40%–60% required. |
| 8 - VCC | Positive Supply | Single 2.7V–4V supply; requires local 0.1µF ceramic + 1µF tantalum bypass to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Shutdown | Supply current scales linearly with sampling frequency - drops to ~1µA in idle, enabling µA-level average power in burst-mode systems. |
| Differential Input Architecture | Rejects common-mode noise up to 100dB at 50kHz - ideal for noisy industrial environments and isolated sensor front-ends. |
| Low-Voltage Operation | Specified performance down to 2.7V - eliminates need for voltage translation or boost converters in modern low-power designs. |
| Flexible Reference Interface | VREF pin accepts external references as low as 200mV - enables 200µV LSB resolution for microvolt-level sensor measurements. |
| SPI/MICROWIRE Compatibility | No glue logic required - interoperates directly with ARM Cortex-M, MSP430, and PIC microcontrollers using standard peripheral drivers. |
Applications
| Portable ECG Monitor | Industrial Temperature Sensor Node |
|---|---|
Use Scenario: Continuous acquisition of low-amplitude biopotential signals from dry electrodes under motion artifact. IC Role / Device Role / Timing Role: Precision front-end ADC capturing differential lead-II signals with 200mV full-scale range and 250ksps sampling. Use Value: 10-bit linearity and 58dB SNR+D at 50kHz enable detection of P-wave morphology without analog gain stages. |
Use Scenario: Battery-powered wireless node measuring RTD/thermistor bridges in HVAC ducts over –25°C to 70°C. IC Role / Device Role / Timing Role: Low-power ratiometric ADC converting bridge voltage with external 2.5V reference for drift-free temperature calculation. Use Value: Auto shutdown cuts average current to <10µA in sleep mode while preserving fast wake-up (<1µs) for periodic readings. |
| Handheld Multimeter Front-End | Motor Phase Current Sensing |
Use Scenario: Digitizing AC/DC voltage and current ranges with autoranging and true RMS computation. IC Role / Device Role / Timing Role: High-speed sampling ADC capturing 100kS/s waveform snapshots for digital RMS and harmonic analysis. Use Value: 250ksps throughput and ±1 LSB INL ensure accurate crest factor and THD calculations across 6½-digit resolution modes. |
Use Scenario: Isolated shunt-based current sensing in BLDC motor drives with real-time overcurrent protection. IC Role / Device Role / Timing Role: Differential ADC measuring bidirectional shunt voltage with fast 2.9µs conversion time and 10-bit resolution. Use Value: Direct connection to shunt amplifier output eliminates offset drift errors; 2.2mW active power minimizes self-heating in enclosed enclosures. |
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 | 8-pin SOIC only; 12-bit resolution; 200ksps; 2.7V–5.25V supply; no auto shutdown. | Higher resolution but lower speed and fixed package; lacks dynamic power scaling for ultra-low-duty-cycle systems. | Choose ADS7822U when 12-bit accuracy is mandatory and board layout permits SOIC; avoid if micropower burst operation is required. |
| MAX11100ETE+ | 10-bit, 500ksps; 2.7V–3.6V; internal reference; 10-pin µMAX; SPI-only interface. | Higher speed but no external VREF flexibility; smaller package increases routing complexity for analog isolation. | Choose MAX11100ETE+ for higher throughput where internal 2.048V reference suffices; avoid when ratiometric or sub-1V full-scale operation is needed. |
Compared with LTC1197LCMS8#TRPBF, ADS7822U trades speed and power efficiency for resolution, while MAX11100ETE+ offers faster sampling but sacrifices reference flexibility and MSOP-8 footprint compatibility - making LTC1197LCMS8#TRPBF optimal for compact, battery-sensitive designs requiring configurable full-scale range.
Availability
LTC1197LCMS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, handheld test equipment, and motor control feedback loops requiring stable component supply across extended product lifecycles.
Supply support for LTC1197LCMS8#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 LTC1197 family was designed by Linear Technology (acquired by ADI in 2017) specifically for micropower, high-speed data acquisition in space- and energy-constrained embedded systems - emphasizing low-voltage operation, minimal external components, and robust serial interfacing.
FAQ
What is the maximum clock frequency supported by the LTC1197LCMS8#TRPBF?
The LTC1197LCMS8#TRPBF supports a maximum clock frequency of 3.5MHz when operating from a 2.7V supply. This corresponds to a 250ksps sampling rate with 10.5 clock cycles per conversion. Exceeding this frequency may cause timing violations or degraded INL/DNL performance, especially at temperature extremes.
Does the LTC1197LCMS8#TRPBF require an external reference voltage?
Yes, the LTC1197LCMS8#TRPBF requires an external reference voltage applied to the VREF pin. It accepts references from 0.2V to VCC + 0.05V (up to 4.05V at VCC = 4V), enabling flexible full-scale configuration. No internal reference is provided - omitting VREF will result in undefined conversion results.
Can the LTC1197LCMS8#TRPBF operate with a 3.3V supply?
Yes, the LTC1197LCMS8#TRPBF is fully specified for operation from 2.7V to 4V, making 3.3V a valid and commonly used supply voltage. At 3.3V, typical supply current is ~0.9mA at 250ksps, and the maximum clock frequency remains 3.5MHz with appropriate timing margins.
What is the analog input impedance of the LTC1197LCMS8#TRPBF?
The LTC1197LCMS8#TRPBF has an analog input capacitance of 20pF on the active channel (+IN or –IN) and 5pF on the inactive channel. Input leakage current is ±1µA over temperature. The effective DC input impedance is very high (>1GΩ), allowing direct connection to high-impedance sensors without buffer amplifiers in many cases.
Is the LTC1197LCMS8#TRPBF pin-compatible with the LTC1197CMS8#TRPBF?
Yes, the LTC1197LCMS8#TRPBF is pin-compatible with the LTC1197CMS8#TRPBF. Both share identical MSOP-8 pinout and function set. The 'L' suffix denotes the 2.7V–4V supply version, while the non-L version operates from 4V–9V - so PCBs designed for one can accommodate the other with only supply rail adjustment.
LTC1197LCMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 250k
- 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:
- 2.7V ~ 4V
- Voltage - Supply, Digital:
- 2.7V ~ 4V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1197LCMS8#TRPBF FAQ
1.How can I place an order for LTC1197LCMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1197LCMS8#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 LTC1197LCMS8#TRPBF reliable?
The price and inventory of LTC1197LCMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1197LCMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1197LCMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1197LCMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1197LCMS8#TRPBF?
LTC1197LCMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1197LCMS8#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 LTC1197LCMS8#TRPBF?
For technical support, including LTC1197LCMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1197LCMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1197LCMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1197LCMS8#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 LTC1197LCMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1197LCMS8#TRPBF?
All LTC1197LCMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1197LCMS8#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 LTC1197LCMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1197LCMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1197LCMS8#TRPBF 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…
