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Analog Devices Inc. LTC1609CG#TRPBF
- Part No.:
- LTC1609CG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1609CG#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
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Product details
Overview
LTC1609CG#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 200ksps serial analog-to-digital converter with integrated sample-and-hold, precision 2.5V reference, and internal clock. It supports ±10V, ±5V, ±3.3V bipolar and 0V–10V, 0V–5V, 0V–4V unipolar input ranges, delivers ±2LSB INL and 87dB typical SNR, and operates from a single 5V supply drawing 65mW. It is used in high-speed industrial data acquisition systems requiring stable DC accuracy and low noise.
For engineers reviewing the LTC1609CG#TRPBF datasheet, LTC1609CG#TRPBF pinout, LTC1609CG#TRPBF application, or LTC1609CG#TRPBF equivalent, key selection criteria include guaranteed no missing codes over temperature, support for both internal and external reference configurations, compatibility with microprocessor/DSP serial interfaces via BUSY/CS/R/C control, and availability in 28-pin SSOP package with defined analog/digital ground separation.
Technical Context
The LTC1609CG#TRPBF implements a switched-capacitor successive approximation architecture with auto-zeroed comparator and 16-bit capacitive DAC. Its conversion cycle comprises a 2µs acquisition phase followed by a 3µs conversion phase, achieving full 5µs throughput time at 200ksps.
It features dual serial interface modes: internal clock mode (DATACLK outputting 16 pulses per conversion) and external clock mode (DATACLK as input synchronized to EXT/INT pin), with configurable straight-binary or two's-complement output format selected via SB/BTC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees 65,536 distinct output codes with no missing codes across temperature |
| Sample Rate | 200ksps - enables real-time capture of signals up to 100kHz Nyquist bandwidth |
| INL | ±2LSB max - ensures monotonicity and <0.003% full-scale linearity error for precision measurement |
| SNR | 87dB typical - supports >14.5 effective number of bits (ENOB) at 1kHz input |
| Power Dissipation | 65mW typical at 5V - allows thermally constrained PCB layouts without forced cooling |
| Input Ranges | ±10V, ±5V, ±3.3V, 0–10V, 0–5V, 0–4V - selectable via external resistor networks on R1IN/R2IN/R3IN pins |
| Reference | Internal 2.5V ±0.2% trimmed bandgap - eliminates need for external reference unless higher accuracy required |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0.300" wide, JEDEC MS-013AC, θJA = 95°C/W. Requires separate analog (AGND1, AGND2) and digital (DGND) ground planes with star-point connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R1IN, R2IN, R3IN | Analog input range configuration nodes | Resistor-connected terminals defining input impedance and scaling for six supported voltage ranges |
| CAP | Reference buffer output | Drives internal DAC; requires 2.2µF tantalum bypass to maintain stability and low noise |
| REF | 2.5V reference output | Factory-trimmed bandgap source; bypass with 2.2µF tantalum for <0.9LSB transition noise |
| SB/BTC | Data format select | High = straight binary (unipolar), Low = two's complement (bipolar); sets output coding convention |
| EXT/INT | Serial clock source select | High = external DATACLK input, Low = internal clock output on DATACLK pin |
| BUSY | Conversion status indicator | Active-low open-drain signal indicating conversion in progress; rising edge marks data validity |
| R/C and CS | Control logic inputs | Edge-triggered start (R/C falling with CS low) and serial enable (CS falling with R/C high) |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed no missing codes | Valid across full operating temperature range (0°C to 70°C), eliminating code gaps in critical control loops |
| Configurable input ranges | Six factory-specified ranges implemented via external resistors-no re-spin needed for system voltage changes |
| Low power shutdown | 50µW standby current with PWRD high preserves previous conversion result in shift register |
| Overvoltage protected inputs | Withstands ±25V on R1IN/R2IN/R3IN-enables direct connection to industrial sensors without front-end clamping |
| Dual serial interface modes | Supports both microcontroller-native timing (internal clock) and synchronous DSP/FPGA timing (external clock) |
Applications
| Industrial Process Monitoring | PC-Based Data Acquisition |
|---|---|
Use Scenario: Continuous monitoring of 4–20mA loop outputs, thermocouple signals, and pressure transducers in PLC-controlled factory lines. IC Role / Device Role / Timing Role: Primary ADC digitizing multiple sensor channels multiplexed through external analog switches; BUSY signal synchronizes FIFO writes. Use Value: ±2LSB INL and 87dB SNR ensure <0.01% measurement uncertainty over 0–70°C ambient, meeting IEC 61000-4-3 immunity requirements. | Use Scenario: High-speed waveform capture in USB/Ethernet DAQ cards for lab testing and automated test equipment. IC Role / Device Role / Timing Role: Standalone sampling engine interfaced to FPGA via CS/R/C/BUSY handshake; DATACLK driven externally at 20MHz for deterministic timing. Use Value: 200ksps throughput with 5µs total latency enables 50kHz real-time FFT analysis without interpolation artifacts. |
| Multiplexed Sensor Systems | Digital Signal Processing Front-End |
Use Scenario: 16-channel vibration monitoring in rotating machinery using piezoelectric accelerometers. IC Role / Device Role / Timing Role: ADC per channel or shared via analog mux; TAG pin enables daisy-chained serial output for compact cabling. Use Value: 100Ω/200Ω input resistor network provides matched 13.3kΩ–22.9kΩ impedance across all ranges, minimizing channel-to-channel gain mismatch. | Use Scenario: Anti-aliasing and digitization stage preceding TI C6000 or Analog Devices SHARC processors in motor control inverters. IC Role / Device Role / Timing Role: Precision analog front-end providing 16-bit samples synchronized to DSP frame clock via SYNC output. Use Value: Internal 2.5V reference with ±5ppm/°C tempco maintains <±0.5% full-scale drift over industrial temperature range, reducing calibration frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7809U | 16-bit, 100ksps, 5V supply, SPI-compatible interface; lacks internal reference and CAP/REF pins | Requires external 2.5V reference and more board space; lower speed limits use in high-throughput systems | Select when cost sensitivity outweighs speed and integration needs |
| AD977ARZ | 16-bit, 100ksps, 5V supply, parallel/serial interface; includes internal reference but no SB/BTC format select | Fixed two's-complement output only; larger 28-lead SOIC package increases layout area | Select when legacy parallel bus interface is required and bipolar-only operation suffices |
Compared with ADS7809U and AD977ARZ, the LTC1609CG#TRPBF offers 2× higher sample rate, integrated reference with buffered CAP output, and flexible data-format selection-making it optimal for new designs prioritizing compactness, mixed-range support, and microcontroller-friendly serial timing.
Availability
LTC1609CG#TRPBF is available at Aetrix Electronics and suitable for industrial process control, PC-based data acquisition, multiplexed sensor systems, and digital signal processing front-end applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC1609CG#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 LTC1609CG#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for high-resolution, low-noise, single-supply ADC applications in thermally and electrically demanding environments.
FAQ
What input voltage ranges does the LTC1609CG#TRPBF support?
The LTC1609CG#TRPBF supports six factory-specified input ranges: bipolar ±10V, ±5V, ±3.3V and unipolar 0V–10V, 0V–5V, 0V–4V. Range selection is accomplished by connecting external resistors between R1IN, R2IN, R3IN, AGND1, AGND2, and CAP pins per Tables 1a and 1b in the datasheet. Each configuration defines a specific input impedance (e.g., 22.9kΩ for ±10V) and scaling network.
How does the LTC1609CG#TRPBF handle reference voltage sourcing?
The LTC1609CG#TRPBF integrates a factory-trimmed 2.5V bandgap reference with ±5ppm/°C tempco, accessible at the REF pin. The buffered CAP pin drives the internal DAC and supports ≤2mA DC loads. An external reference (2.3V–2.7V) may overwrite the internal reference when applied to REF, enabling higher accuracy in metrology-grade systems where the LTC1609CG#TRPBF's linearity remains fully guaranteed.
What is the function of the SB/BTC and EXT/INT pins on the LTC1609CG#TRPBF?
SB/BTC selects output data format: high = straight binary (for unipolar ranges), low = two's complement (for bipolar ranges). EXT/INT selects serial clock source: high = external clock applied to DATACLK pin, low = internal clock output on DATACLK. These pins allow the LTC1609CG#TRPBF to interface natively with both microcontrollers (internal clock, binary) and DSPs/FPGAs (external clock, two's complement) without level-shifting or protocol translation.
Can the LTC1609CG#TRPBF be used in power-constrained applications?
Yes-the LTC1609CG#TRPBF draws only 65mW typical during active conversion and reduces to 50µW in power-down mode when PWRD is high. In shutdown, the internal reference and buffer are disabled, but the last conversion result remains latched in the 16-bit shift register for readout after wake-up. Recovery time depends on external capacitor recharge, typically <1ms with recommended 2.2µF tantalum on CAP/REF.
Does the LTC1609CG#TRPBF require separate analog and digital ground connections?
Yes-the LTC1609CG#TRPBF has three dedicated ground terminals: AGND1 (pin 2), AGND2 (pin 7), and DGND (pin 10). AGND1 and AGND2 serve the analog front-end and reference circuitry; DGND serves digital I/O. All must be tied to a common system ground at a single point to prevent ground-loop-induced offset errors. Layout best practice is a split ground plane with bridge at the device footprint.
LTC1609CG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- 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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1609CG#TRPBF FAQ
1.How can I place an order for LTC1609CG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1609CG#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 LTC1609CG#TRPBF reliable?
The price and inventory of LTC1609CG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1609CG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1609CG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1609CG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1609CG#TRPBF?
LTC1609CG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1609CG#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 LTC1609CG#TRPBF?
For technical support, including LTC1609CG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1609CG#TRPBF requirements.
6.How does Aetrix verify that LTC1609CG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1609CG#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 LTC1609CG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1609CG#TRPBF?
All LTC1609CG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1609CG#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 LTC1609CG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1609CG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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