My Inquiry
My Account
Analog Devices Inc. LTC1197CS8#PBF
- Part No.:
- LTC1197CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1197CS8#PBF.pdf
- Description:
- IC ADC 10BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1197CS8#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 250ksps successive approximation ADC with differential analog input, internal sample-and-hold, and 3-wire SPI/MICROWIRE-compatible serial interface. It operates from a single 2.7V supply, draws only 0.8mA at full speed, and features auto shutdown that scales supply current linearly with sampling rate - enabling micropower operation in battery-powered data acquisition systems.
For engineers reviewing the LTC1197CS8#PBF datasheet, LTC1197CS8#PBF pinout, LTC1197CS8#PBF application, or LTC1197CS8#PBF equivalent, key selection considerations include its 2.7V operation, ±2 LSB offset error, 58dB SNR at 50kHz input, 8-pin SO package, and differential input architecture supporting ratiometric or external reference configurations.
Technical Context
The LTC1197CS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold and programmable reference input (VREF). Its differential input stage accepts signals from 0V to VCC with high-impedance inputs (±1µA leakage), enabling direct connection to low-output-impedance sensors without gain stages.
It uses a synchronous 3-wire serial interface (CS, CLK, DOUT) with MSB-first output, 14-clock cycle timing (tCYC = 14 CLKs), and automatic power-down between conversions. Conversion time is fixed at 2.9µs (G), and it supports unipolar transfer only with no software-configurable MUX - distinguishing it from the LTC1199 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit, no missing codes guaranteed over full temperature range |
| Max Sampling Rate | 250ksps at VCC = 2.7V - enables real-time monitoring of sub-250kHz signals |
| Supply Current | 0.8mA typical at 250ksps; drops linearly with reduced sample rate for adaptive power control |
| Offset Error | ±2 LSB over full temperature range - ensures consistent zero-input accuracy across environments |
| Signal-to-Noise + Distortion | 58dB at 50kHz input - supports ~9.3 ENOB for precision sensor digitization |
| Analog Input Range | 0V to VCC (2.7V), differential - allows measurement of floating signals with common-mode rejection |
| Reference Input | VREF pin accepts 0.2V to VCC + 0.05V - enables flexible scaling from 200mV spans up to full supply |
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 | Chip Select Input | Active-low enable; initiates conversion and serial transfer; high = auto shutdown mode |
| 2 +IN | Differential Analog Input (+) | High-impedance input (20pF); accepts signal referenced to –IN or GND in pseudo-differential mode |
| 3 –IN | Differential Analog Input (–) | High-impedance input (20pF); defines common-mode level; 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 0.2V–2.75V span; bypassing critical for noise-sensitive applications |
| 6 DOUT | Serial Data Output | MSB-first, 10-bit result; tri-state when CS high; 3-wire interface compatible with SPI/MICROWIRE |
| 7 CLK | Serial Clock Input | Synchronizes data transfer on rising edge; max 3.5MHz at 2.7V; duty cycle ≥40% |
| 8 VCC | Positive Supply | Single 2.7V to 4V supply; requires local 1µF ceramic + 0.1µF ceramic bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| Differential analog input | Enables rejection of common-mode noise and direct interfacing with bridge sensors or instrumentation amplifiers |
| Auto shutdown with linear power scaling | Reduces supply current proportionally as sampling frequency decreases - eliminates need for external power gating logic |
| 2.7V single-supply operation | Supports direct integration into Li-ion or coin-cell powered systems without voltage translation or regulation overhead |
| External reference flexibility | VREF pin accepts precision references down to 200mV, enabling sub-millivolt resolution (e.g., 200µV/LSB at 0.2V span) |
| 3-wire SPI/MICROWIRE interface | Minimizes MCU GPIO usage and PCB routing complexity while maintaining compatibility with standard serial peripherals |
Applications
| Portable ECG Monitor | Industrial Temperature Sensor Node |
|---|---|
Use Scenario: Digitizing low-amplitude, high-impedance biopotential signals from dry electrodes with minimal front-end gain. IC Role / Device Role / Timing Role: Precision 10-bit ADC capturing differential lead-II ECG waveforms at 250ksps with auto shutdown between beats. Use Value: 58dB SNR and ±2 LSB offset ensure accurate R-wave detection and ST-segment analysis without calibration drift across 0°C–70°C. |
Use Scenario: Converting outputs from RTD or thermistor bridges in wireless sensor transmitters operating on AA batteries. IC Role / Device Role / Timing Role: Low-power SAR ADC sampling bridge voltage differentially against a stable 2.5V reference at 1ksps average rate. Use Value: 0.8mA active current and linear shutdown reduce average power to <1µA in sleep mode, extending battery life beyond 5 years. |
| Handheld Multimeter Front-End | Automotive Battery Cell Monitor |
Use Scenario: Measuring AC/DC voltage, current, and resistance with autoranging and true RMS support in compact handheld form factor. IC Role / Device Role / Timing Role: Primary 10-bit sampling ADC handling multiple input ranges via external programmable gain amplifier and multiplexer. Use Value: Differential input and 200mV–2.7V VREF range allow seamless scaling from µV-level thermocouple inputs to 10V full-scale measurements. |
Use Scenario: Monitoring individual Li-ion cell voltages in 12S BMS modules where space and power are constrained. IC Role / Device Role / Timing Role: High-accuracy ADC digitizing isolated cell voltage differences using external precision resistive dividers and reference. Use Value: ±4 LSB gain error and ±1 LSB linearity over temperature ensure <10mV absolute cell voltage accuracy required for SOC estimation. |
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-bit resolution, 200ksps, 2.7–5.25V supply, SPI interface, no differential input | Lacks differential input and 10-bit resolution; suitable only for lower-accuracy voltage monitoring | Select only if 8-bit resolution suffices and board layout cannot accommodate differential routing |
| MAX11100ASA+ | 10-bit, 500ksps, 2.7–3.6V supply, internal reference, pseudo-differential input (single-ended with common-mode sense) | Higher speed but no true differential input; internal 2.048V reference limits span flexibility vs external VREF | Prefer when higher throughput is needed and external reference is not required |
Compared with ADS7822U and MAX11100ASA+, the LTC1197CS8#PBF uniquely delivers true differential input, externally adjustable reference, and guaranteed 10-bit no-missing-codes performance at 250ksps - making it optimal for precision sensor interfaces where common-mode rejection and reference flexibility are critical.
Availability
LTC1197CS8#PBF is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, handheld test equipment, and automotive battery monitors requiring stable component supply with long-term manufacturability.
Supply support for LTC1197CS8#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1197CS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for ultra-low-power, high-accuracy sensor digitization in space- and energy-constrained systems.
FAQ
What is the maximum clock frequency supported by the LTC1197CS8#PBF?
The LTC1197CS8#PBF supports a maximum clock frequency of 3.5MHz when operating from a 2.7V supply. This clock rate enables its full 250ksps sampling capability and is specified over the entire operating temperature range (0°C to 70°C for the 'C' grade). Exceeding this frequency may cause timing violations or conversion errors, as confirmed in the Recommended Operating Conditions table.
Does the LTC1197CS8#PBF support true differential input mode?
Yes, the LTC1197CS8#PBF supports true differential input operation using the +IN (Pin 2) and –IN (Pin 3) terminals. The device measures the voltage difference between these two pins, providing inherent common-mode noise rejection. Unlike pseudo-differential or single-ended variants, it does not require internal switching or configuration bits to activate this mode - it is the default and only analog input architecture for the LTC1197/LTC1197L family.
Can the LTC1197CS8#PBF operate with a 2.5V reference voltage?
Yes, the LTC1197CS8#PBF can operate with a 2.5V reference applied to the VREF pin. Its reference input range is specified from 0.2V to VCC + 0.05V (i.e., up to 2.75V at 2.7V supply), and typical performance data (SNR, THD) in the datasheet is explicitly characterized at VREF = 2.5V with VCC = 2.7V. A stable, low-noise 2.5V reference is recommended for optimal 58dB SNR performance.
What is the shutdown current of the LTC1197CS8#PBF?
The LTC1197CS8#PBF draws only leakage current in shutdown mode - specified as 0.001µA to 3µA (typical 0.001µA) when CS is high and fSMPL = 0. This ultra-low shutdown current enables multi-year battery life in intermittent-sampling applications such as environmental sensor loggers. The device automatically enters this state whenever CS is deasserted, requiring no additional control signals.
Is the LTC1197CS8#PBF pin-compatible with the LTC1199CS8#PBF?
No, the LTC1197CS8#PBF is not pin-compatible with the LTC1199CS8#PBF. While both use 8-pin SO packages, Pin 5 is VREF on the LTC1197CS8#PBF but DIN (digital input) on the LTC1199CS8#PBF, and Pin 3 is –IN on the LTC1197CS8#PBF but CH1 on the LTC1199CS8#PBF. Their functional architectures differ fundamentally: LTC1197 is differential-input-only, while LTC1199 integrates a 2-channel MUX and requires configuration data via DIN.
LTC1197CS8#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:
- 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#PBF FAQ
1.How can I place an order for LTC1197CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1197CS8#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 LTC1197CS8#PBF reliable?
The price and inventory of LTC1197CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1197CS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1197CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1197CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1197CS8#PBF?
LTC1197CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1197CS8#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 LTC1197CS8#PBF?
For technical support, including LTC1197CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1197CS8#PBF requirements.
6.How does Aetrix verify that LTC1197CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1197CS8#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 LTC1197CS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1197CS8#PBF?
All LTC1197CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1197CS8#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 LTC1197CS8#PBF part is unused and in its original packaging.
Return procedure for LTC1197CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1197CS8#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…
