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Analog Devices Inc. LTC2309HF#TRPBF
- Part No.:
- LTC2309HF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LTC2309HF#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,885
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Product details
Overview
LTC2309HF#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, 8-channel, 12-bit successive approximation register (SAR) analog-to-digital converter with I²C interface, internal 2.5V reference, and 8-channel multiplexer. It delivers 73.4dB SNR, 14ksps throughput, and operates from a single 5V supply across –40°C to 125°C - ideal for high-temperature industrial data acquisition systems monitoring power supplies or motor feedback.
For engineers reviewing the LTC2309HF#TRPBF datasheet, LTC2309HF#TRPBF pinout, LTC2309HF#TRPBF application, or LTC2309HF#TRPBF equivalent, key selection criteria include guaranteed no missing codes, software-selectable unipolar/bipolar input ranges, fast 1.3µs conversion time, sleep-mode current of 7–15µA, and TSSOP-20 package compatibility with high-temp PCB layouts.
Technical Context
The LTC2309HF#TRPBF integrates a fully differential sample-and-hold circuit and internal conversion clock to achieve 1.3µs conversion time without external timing components. Its SAR architecture uses a 12-bit capacitive DAC and differential comparator for precise binary-weighted charge redistribution.
It supports both single-ended and differential analog inputs via an 8-channel MUX controlled by a 6-bit DIN word, with configurable S/D (single/diff), O/S (odd/sign), channel select (S1/S0), UNI (unipolar/bipolar), and SLP (sleep) bits - enabling dynamic reconfiguration between conversions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonicity and full-scale fidelity in closed-loop control. |
| Throughput Rate | 14ksps - supports real-time sampling of motor current waveforms or accelerometer transients. |
| SNR | 73.4dB at 1kHz - enables accurate digitization of low-amplitude sensor signals in noisy industrial environments. |
| Supply Current | 2.3–3mA at 14ksps; 7–15µA in sleep mode - reduces thermal load and extends battery life in portable instrumentation. |
| Input Range | Software-selectable 0V–4.096V (unipolar) or ±2.048V (bipolar) - simplifies signal conditioning for diverse sensor types. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive subsystems and industrial motor drives. |
| Reference | Internal 2.5V bandgap reference (±25ppm/°C tempco), buffered to 4.096V at REFCOMP - eliminates need for external precision reference. |
Pinout & Package
Package: 20-lead plastic TSSOP (F package), exposed pad not present - compatible with standard surface-mount assembly and high-temperature reflow profiles up to 300°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFCOMP (Pin 1) | Reference buffer output | Provides 4.096V reference voltage; requires 10µF + 0.1µF parallel bypassing for stable ADC operation. |
| GND (Pins 2, 8, 9) | Ground connection | Three dedicated ground pins reduce ground bounce and improve noise immunity in mixed-signal layouts. |
| VDD (Pins 3, 10) | 5V supply input | Accepts 4.75V–5.25V; requires local 10µF + dual 0.1µF ceramic decoupling per pin. |
| AD0 / AD1 (Pins 4, 5) | I²C address configuration | Three-state inputs (LOW/HIGH/floating) set one of nine device addresses plus global sync - enables multi-drop bus topology. |
| SCL / SDA (Pins 6, 7) | I²C serial interface | Standard-mode (400kHz) slave interface; SDA is open-drain requiring external pull-up to VDD. |
| CH0–CH7 (Pins 11–18) | Analog input channels | Eight fully configurable inputs supporting single-ended or differential pairs (e.g., CH0/CH1, CH2/CH3). |
| COM (Pin 19) | Common-mode reference | Reference point for all single-ended inputs; tied to GND (unipolar) or REFCOMP/2 (bipolar) to define input range. |
| VREF (Pin 20) | 2.5V reference output | Internal bandgap reference; can be overdriven by external source when grounded to disable internal buffer. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 8-channel analog MUX | Enables sequential sampling of eight sensors or signals without external switching components - saves board space and reduces BOM count. |
| Software-selectable unipolar/bipolar mode | Single register bit configures full-scale range, eliminating hardware jumpers and supporting flexible sensor integration (e.g., accelerometers vs. thermocouples). |
| Low-power sleep mode (7–15µA) | Reduces system standby power in battery-operated instruments while retaining fast wake-up (<200ms REFCOMP settling) for event-triggered acquisition. |
| Guaranteed operation to +125°C | Validated performance across full temperature range - suitable for engine control units, industrial inverters, and downhole equipment. |
| I²C-compatible 2-wire interface | Minimizes routing complexity and GPIO usage on microcontrollers - especially valuable in space-constrained embedded designs. |
Applications
| Industrial Process Control | Motor Control Feedback |
|---|---|
Use Scenario: Monitoring multiple analog process variables (pressure, temperature, flow) in PLC I/O modules. IC Role / Device Role / Timing Role: 8-channel SAR ADC digitizing sensor outputs with synchronized I²C reads and internal reference stability. Use Value: Eliminates external multiplexers and references, reducing component count and calibration drift over temperature. |
Use Scenario: Sampling phase currents and DC bus voltage in 3-phase inverter gate drivers. IC Role / Device Role / Timing Role: High-speed, low-latency ADC capturing transient current spikes with 1.3µs conversion and 14ksps sustained rate. Use Value: Enables precise field-oriented control (FOC) algorithms without external timing circuitry or high-speed parallel buses. |
| Battery-Operated Instrumentation | Isolated Remote Data Acquisition |
Use Scenario: Portable multimeters or handheld environmental monitors powered by Li-ion cells. IC Role / Device Role / Timing Role: Low-power ADC operating in nap/sleep modes between measurements, waking on trigger to capture 12-bit samples. Use Value: Achieves >1-year battery life at intermittent sampling rates due to 7µA sleep current and efficient I²C burst reads. |
Use Scenario: Distributed sensor nodes in factory automation using digital isolators (e.g., ADuM1250) on I²C lines. IC Role / Device Role / Timing Role: Isolated-side ADC providing galvanically separated analog sensing with minimal footprint and no isolated clock distribution. Use Value: Simplifies isolation design by removing need for isolated SPI clocks or level-shifted parallel interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, SPI interface, 1MSPS max, no internal reference - requires external 2.5V ref and level-shifting for 5V systems. | Better channel count and speed but higher power (1.5mA active); lacks I²C simplicity and integrated reference. | Select for high-speed, high-channel-count systems where SPI is preferred and external reference is acceptable. |
| MCP3208-CI/P | 12-bit, 8-channel, SPI interface, 100ksps, internal 4.096V ref, 5V-tolerant I/O - no sleep mode; rated only to +85°C. | Lower cost and simpler layout but limited temperature range and no true sleep state - unsuitable for extended high-temp operation. | Select for cost-sensitive consumer or commercial applications below 85°C with existing SPI infrastructure. |
Compared with ADS7953IRHBT and MCP3208-CI/P, the LTC2309HF#TRPBF uniquely combines I²C simplicity, internal reference, guaranteed 125°C operation, and ultra-low sleep current - making it optimal for thermally demanding, space-constrained, and low-power industrial nodes.
Availability
LTC2309HF#TRPBF is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and battery-operated instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC2309HF#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 acquired Linear Technology in 2017 and maintains its precision analog product lines with rigorous qualification standards for industrial and automotive applications.
The LTC2309HF#TRPBF belongs to the LTC® precision SAR ADC family designed for high-accuracy, low-power, multi-channel data acquisition in harsh environments - emphasizing thermal stability, noise performance, and interface simplicity.
FAQ
What is the maximum operating temperature of the LTC2309HF#TRPBF?
The LTC2309HF#TRPBF is specified for continuous operation from –40°C to +125°C, with full electrical performance guaranteed across this range. This H-grade qualification makes it suitable for under-hood automotive electronics, industrial motor drives, and downhole sensing applications where ambient temperatures exceed 100°C.
Does the LTC2309HF#TRPBF require an external reference voltage?
No, the LTC2309HF#TRPBF includes a factory-trimmed 2.5V internal bandgap reference, amplified to 4.096V at the REFCOMP pin. External references are optional - the internal reference supports full 12-bit accuracy and ±25ppm/°C tempco, eliminating BOM cost and layout area unless higher precision is required.
How many I²C addresses does the LTC2309HF#TRPBF support?
The LTC2309HF#TRPBF supports nine unique I²C addresses via AD0 and AD1 pins (each configurable as LOW, HIGH, or floating), plus one global address for synchronized conversions across multiple devices - enabling robust multi-node sensor networks on a single I²C bus without address conflicts.
What is the conversion time and throughput rate of the LTC2309HF#TRPBF?
The LTC2309HF#TRPBF achieves a fixed conversion time of 1.3µs and a maximum sustained throughput rate of 14ksps. This allows deterministic sampling of fast transients such as motor current spikes or vibration signatures while maintaining low latency and predictable timing behavior in real-time control loops.
Can the LTC2309HF#TRPBF perform differential measurements?
Yes, the LTC2309HF#TRPBF supports both single-ended and differential input configurations via its 8-channel MUX. Differential pairs include CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7 - selected dynamically through the 6-bit DIN command - providing common-mode noise rejection critical in electrically noisy industrial settings.
LTC2309HF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 14k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2309HF#TRPBF FAQ
1.How can I place an order for LTC2309HF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2309HF#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 LTC2309HF#TRPBF reliable?
The price and inventory of LTC2309HF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2309HF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2309HF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2309HF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2309HF#TRPBF?
LTC2309HF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2309HF#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 LTC2309HF#TRPBF?
For technical support, including LTC2309HF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2309HF#TRPBF requirements.
6.How does Aetrix verify that LTC2309HF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2309HF#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 LTC2309HF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2309HF#TRPBF?
All LTC2309HF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2309HF#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 LTC2309HF#TRPBF part is unused and in its original packaging.
Return procedure for LTC2309HF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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