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Analog Devices Inc. LTC2306CDD#TRPBF
- Part No.:
- LTC2306CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2306CDD#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,667
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Product details
Overview
LTC2306CDD#TRPBF from Analog Devices (formerly Linear Technology) is a 2-channel, 12-bit successive approximation register (SAR) ADC with SPI/MICROWIRE-compatible serial interface, 500ksps sampling rate, 72.8dB SINAD, and fully differential sample-and-hold circuitry. It operates from a single 5V supply, draws 2.8mA at full speed, and supports software-selectable unipolar (0V to 4.096V) or bipolar (±2.048V) input ranges - ideal for precision industrial sensor data acquisition.
For engineers reviewing the LTC2306CDD#TRPBF datasheet, LTC2306CDD#TRPBF pinout, LTC2306CDD#TRPBF application, or LTC2306CDD#TRPBF equivalent, key selection criteria include guaranteed no missing codes, channel-to-channel isolation of –109dB, internal conversion clock enabling SCK up to 40MHz, separate OVDD rail (2.7V–5.25V), and 10-pin 3mm × 3mm DFN package with exposed ground pad.
Technical Context
The LTC2306CDD#TRPBF implements a capacitive charge-redistribution SAR architecture with a 2-channel analog multiplexer, supporting both single-ended and differential configurations per channel via 6-bit SPI command word (S/D, O/S, UNI bits). Its fully differential sample-and-hold reduces common-mode noise while maintaining 700kHz full linear bandwidth and 25MHz –3dB input bandwidth.
Conversion is initiated by a rising edge on CONVST; acquisition time is 240ns, conversion time is 1.3–1.6µs, and auto-shutdown scales supply current from 2.8mA at 500ksps down to 14µA at 1ksps. The device uses an external reference (0.1V–VDD) and features separate OVDD for level-shifted digital output compatibility with 2.7V–5.25V logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonic transfer function for closed-loop control accuracy. |
| Sampling Rate | 500ksps maximum - supports real-time monitoring of fast transients in motor control and vibration sensing. |
| SINAD | 72.8dB at fIN = 1kHz - enables >11.8 effective number of bits (ENOB) for high-fidelity signal capture. |
| Input Range | Software-selectable 0V–4.096V (unipolar) or ±2.048V (bipolar) - simplifies interface to diverse sensor outputs without external gain/level shift. |
| Supply Current | 2.8mA at 500ksps; 14µA at 1ksps - enables battery-powered operation with adaptive power scaling. |
| Channel Isolation | –109dB at 1kHz - prevents crosstalk between CH0 and CH1 during simultaneous sampling of independent signals. |
| Reference Input | 0.1V to VDD (max 5.25V); 230µA max current at 500ksps - allows flexible use of internal or external references including LT6660/LT1790. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 11), rated for 0°C to 70°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: SDO | Three-state serial data output | Outputs previous conversion result on falling edge of SCK; enabled only when CONVST is low - enables daisy-chaining and isolated serial bus design. |
| Pin 2: CONVST | Conversion start trigger | Rising-edge sensitive; must return low within 40ns after conversion start/end - defines precise timing boundary for acquisition window. |
| Pin 3: VDD | Analog/digital core supply | 4.75V–5.25V range; bypassed with 0.1µF ceramic + 10µF tantalum - powers internal SAR, DAC, and logic; requires clean analog rail. |
| Pin 4: CH0 | Channel 0 analog input | Configurable as single-ended (vs GND) or differential (with CH1); input capacitance 55pF in sample mode - dictates RC filter design for settling. |
| Pin 5: CH1 | Channel 1 analog input | Paired with CH0 for differential operation or used independently; matched unipolar/bipolar full-scale error (±0.3 LSB) - ensures channel consistency in dual-sensor systems. |
| Pin 6: VREF | External reference input | Accepts 0.1V–VDD; 55pF input capacitance; requires 10µF + 0.1µF decoupling - sets ADC full-scale range and directly impacts measurement accuracy. |
| Pin 7: GND | Analog/digital ground | Common reference for all analog inputs, reference, and supplies; exposed pad (Pin 11) must be soldered to PCB ground plane - critical for noise immunity and thermal performance. |
| Pin 8: SDI | Serial data input | Latches 6-bit configuration word (S/D, O/S, UNI) on first 6 SCK rising edges - selects input mode, polarity, and range before each conversion. |
| Pin 9: SCK | Serial clock input | Supports up to 40MHz; controls timing of SDI latching and SDO shifting - enables high-speed data transfer compatible with FPGA/ASIC interfaces. |
| Pin 10: OVDD | Digital output driver supply | 2.7V–5.25V independent rail; sets SDO logic levels - allows interfacing with mixed-voltage systems (e.g., 3.3V MCU with 5V analog section). |
Key Features
| Feature | Design Value |
|---|---|
| Auto-shutdown power scaling | Reduces IDD from 2.8mA (500ksps) to 14µA (1ksps), cutting idle power by >99% - extends battery life in portable instrumentation. |
| Software-selectable input range | Single command bit (UNI) switches between unipolar (0V–4.096V) and bipolar (±2.048V) modes - eliminates need for external op-amp reconfiguration circuitry. |
| Internal conversion clock | Removes dependency on external clock source; allows SCK frequency to vary freely up to 40MHz - simplifies timing design in isolated or variable-rate systems. |
| Separate OVDD supply | Enables SDO output swing from 2.7V to 5.25V independent of VDD - supports direct connection to 3.3V or 5V logic without level translators. |
| Channel-to-channel isolation | –109dB at 1kHz - prevents interference between CH0 and CH1 when measuring unrelated signals (e.g., voltage + current in power monitoring). |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous acquisition of temperature, pressure, and flow sensor outputs in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling front-end ADC converting analog sensor outputs into digital values for PID loop execution at 500ksps. Use Value: 72.8dB SINAD and channel matching (±0.3 LSB full-scale error) ensure accurate multi-sensor correlation without calibration drift across temperature. |
Use Scenario: Real-time capture of phase current and bus voltage in three-phase inverter drives for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: High-speed, low-latency ADC providing synchronized CH0 (current) and CH1 (voltage) samples to DSP/FPGA every 2µs. Use Value: 240ns acquisition time and 1.3µs conversion enable tight current-loop timing; –109dB channel isolation prevents voltage transients from corrupting current measurements. |
| Battery-Operated Test Equipment | Isolated Data Acquisition |
|
Use Scenario: Handheld multimeter or oscilloscope probe with dual-input capability, powered by Li-ion battery and requiring >10-hour runtime. IC Role / Device Role / Timing Role: Low-power 12-bit ADC handling both DC voltage and AC RMS measurements with automatic range switching. Use Value: Auto-shutdown reduces current to 14µA at 1ksps sampling, extending battery life; 3mm × 3mm DFN minimizes PCB footprint for compact enclosure design. |
Use Scenario: Remote sensor node in hazardous environment (e.g., high-voltage substation) transmitting digitized analog data across opto-isolator or RF link. IC Role / Device Role / Timing Role: SPI-compatible ADC interfaced to isolated microcontroller via 4-wire serial bus, eliminating ground loops. Use Value: SPI/MICROWIRE compatibility and separate OVDD allow direct connection to isolated logic side; low 2.8mA active current eases isolated power supply design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200ksps max, single-supply 2.7–5.25V, no internal reference - lower precision and speed. | Targeted at cost-sensitive, lower-accuracy applications like basic panel meters. | Select LTC2306CDD#TRPBF when 12-bit ENOB, 500ksps throughput, and channel isolation are required. |
| MAX11603EEE+ | 12-bit, 200ksps, internal reference, I²C interface, 10-pin µMAX - slower, different serial protocol, no OVDD flexibility. | Suitable for space-constrained embedded systems where I²C bus sharing is preferred over SPI. | Choose LTC2306CDD#TRPBF for SPI-based systems needing higher speed, lower noise, and configurable output voltage rails. |
Compared with ADS7822U and MAX11603EEE+, the LTC2306CDD#TRPBF delivers 4× higher resolution, 2.5× faster sampling, and unique OVDD independence - making it optimal for precision, high-throughput, and mixed-voltage industrial data acquisition.
Availability
LTC2306CDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, motor feedback systems, and battery-operated test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2306CDD#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) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2306CDD#TRPBF belongs to the LTC230x family of low-noise, high-speed SAR ADCs designed specifically for precision industrial, instrumentation, and energy-monitoring applications demanding excellent dynamic performance in compact packages.
FAQ
What is the operating temperature range for the LTC2306CDD#TRPBF?
The LTC2306CDD#TRPBF is specified for 0°C to 70°C ambient operation (C-grade). This is confirmed by the "CDD" suffix in the part number and the order information table listing "LTC2306CDD#TRPBF" under the 0°C to 70°C temperature grade with LDGW package marking.
Does the LTC2306CDD#TRPBF require an external reference voltage?
Yes, the LTC2306CDD#TRPBF requires an external reference voltage applied to the VREF pin. The reference range is 0.1V to VDD (up to 5.25V), and typical use cases employ precision references such as the LT6660 (4.096V) or LT1790 (4.096V), decoupled with 10µF + 0.1µF capacitors as specified in the datasheet.
How many analog input channels does the LTC2306CDD#TRPBF support?
The LTC2306CDD#TRPBF supports two analog input channels (CH0 and CH1), configurable either as independent single-ended inputs referenced to GND or as a differential pair. This is explicitly stated in the product description, features list ("1-/2-Channel"), and pin configuration diagram for the LTC2306 variant.
What serial interface protocol does the LTC2306CDD#TRPBF use?
The LTC2306CDD#TRPBF uses an SPI/MICROWIRE-compatible 4-wire serial interface with dedicated SDO, SDI, SCK, and CONVST lines. It is not I²C or UART-based. The interface supports up to 40MHz SCK and uses a 6-bit command word for mode configuration, as detailed in the Applications Information section.
Can the LTC2306CDD#TRPBF operate with different supply voltages for analog core and digital output?
Yes, the LTC2306CDD#TRPBF features separate VDD (4.75V–5.25V for analog/digital core) and OVDD (2.7V–5.25V for digital output drivers) supplies. This allows the SDO output to interface directly with 3.3V or 5V logic systems independently of the analog supply, enhancing system-level voltage domain flexibility.
LTC2306CDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2306CDD#TRPBF FAQ
1.How can I place an order for LTC2306CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2306CDD#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 LTC2306CDD#TRPBF reliable?
The price and inventory of LTC2306CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2306CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2306CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2306CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2306CDD#TRPBF?
LTC2306CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2306CDD#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 LTC2306CDD#TRPBF?
For technical support, including LTC2306CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2306CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2306CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2306CDD#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 LTC2306CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2306CDD#TRPBF?
All LTC2306CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2306CDD#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 LTC2306CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2306CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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