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Analog Devices Inc. LTC1609CSW#TRPBF
- Part No.:
- LTC1609CSW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1609CSW#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,001
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Product details
Overview
LTC1609CSW#TRPBF from Analog Devices (acquired 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 operates from a single 5V supply, supports ±10V/±5V/±3.3V bipolar and 0V–10V/0V–5V/0V–4V unipolar input ranges, and delivers ±2LSB INL, 87dB typical SNR, and guaranteed no missing codes over temperature. It is used in high-speed industrial data acquisition systems requiring stable DC accuracy and low-power operation.
For engineers reviewing the LTC1609CSW#TRPBF datasheet, LTC1609CSW#TRPBF pinout, LTC1609CSW#TRPBF application, or LTC1609CSW#TRPBF equivalent, key selection considerations include its 20-pin SO package, dual-mode serial interface (internal/external DATACLK), SB/BTC format select, EXT/INT clock source control, and support for external reference injection at REF/CAP pins.
Technical Context
The LTC1609CSW#TRPBF implements a switched-capacitor successive approximation architecture with auto-zeroed comparator and 16-bit capacitive DAC. Its sample-and-hold acquires input signals within 2µs, and conversion completes in 3µs with 5µs total throughput time.
It features dual ground domains (AGND1/AGND2/DGND), separate analog (VANA) and digital (VDIG) 5V supplies, and configurable data output format (straight binary or two's complement) via SB/BTC pin. The internal 2.5V reference has ±5ppm/°C tempco and can be overdriven by an external reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes with guaranteed no missing codes across temperature. |
| Sample Rate | 200ksps - supports real-time acquisition of signals up to 100kHz Nyquist bandwidth. |
| INL | ±2LSB (typ) - ensures linearity error ≤ ±0.003% of full-scale range, critical for precision measurement. |
| SNR | 87dB (typ) - enables >14-bit effective resolution for low-noise signal digitization. |
| Power Dissipation | 65mW (typ) at 200ksps - allows thermally constrained embedded designs without forced cooling. |
| Power-Down Current | 50µW (typ) - reduces standby power by >1,300×, suitable for battery-backed monitoring nodes. |
| Analog Input Range | Configurable ±10V, ±5V, ±3.3V or 0V–10V, 0V–5V, 0V–4V - eliminates external level-shifting for common sensor outputs. |
Pinout & Package
Package: 20-lead plastic SO (SOIC-20), 0.300" wide, JEDEC MS-013AC. Pin pitch: 0.050", body dimensions: 0.300" × 0.220". Thermal resistance θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R1IN | Analog Input Channel 1 | Primary analog input terminal; configured with R2IN/R3IN and external resistors for six selectable input ranges. |
| AGND1 | Analog Ground 1 | Dedicated analog return path for R1IN/R2IN/R3IN; must connect to clean analog ground plane. |
| R2IN | Analog Input Channel 2 | Secondary analog input terminal; used with R1IN/R3IN to set gain/offset per Table 1a/1b. |
| R3IN | Analog Input Channel 3 | Third analog input terminal; completes resistor network for bipolar/unipolar range selection. |
| CAP | Reference Buffer Output | Drives internal DAC; requires 2.2µF tantalum bypass to AGND2 for low-noise operation. |
| REF | 2.5V Reference Output | Factory-trimmed bandgap reference; can be overdriven by external reference for improved accuracy. |
| AGND2 | Analog Ground 2 | Return for CAP/REF; isolated from AGND1 to minimize reference noise coupling. |
| SB/BTC | Data Format Select | High = straight binary (0V–10V); Low = two's complement (±10V); sets DATA output coding convention. |
| EXT/INT | Serial Clock Source Select | High = external DATACLK input; Low = internal clock output on DATACLK pin during conversion. |
| DGND | Digital Ground | Return for CS, R/C, BUSY, DATA, DATACLK, SYNC, TAG; separated from analog grounds to prevent noise injection. |
| VDIG | Digital Supply | +5V digital rail; must tie directly to VANA to ensure logic-level compatibility and reduce supply noise. |
| VANA | Analog Supply | +5V analog rail; bypassed with 0.1µF ceramic + 10µF tantalum to suppress high-frequency switching noise. |
| PWRD | Power-Down Control | High = enter ultra-low-power mode (50µW); retains last conversion result in shift register. |
| BUSY | Conversion Status Flag | Active-low open-drain output; goes low at conversion start, rises when 16-bit result is ready in shift register. |
| CS | Chip Select | Active-low enable; falling edge (with R/C high) initiates conversion or enables serial output. |
| R/C | Read/Convert Control | Falling edge (with CS low) starts conversion; rising edge enables serial data output after conversion. |
| TAG | Serial Data Tag Input | In EXT/INT = high mode, injected into DATA stream after 16-bit result for daisy-chained multi-ADC systems. |
| DATA | Serial Data Output | MSB-first 16-bit output; format determined by SB/BTC; valid relative to DATACLK edges per timing specs. |
| DATACLK | Serial Clock I/O | Input when EXT/INT = high; output (16 pulses) when EXT/INT = low; defines DATA timing window. |
| SYNC | Synchronization Pulse Output | Provides timing marker aligned to DATACLK edge; used to coordinate multiple ADCs or external logic. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5V reference with ±5ppm/°C tempco | Eliminates need for external reference IC while maintaining <±0.01% full-scale drift over –40°C to +85°C. |
| Configurable input ranges (6 options) | Reduces BOM count and PCB footprint by supporting diverse sensor outputs (e.g., ±10V industrial transducers, 0–5V microcontroller sensors) without external op-amp scaling. |
| Two serial interface modes (internal/external clock) | Enables flexible system integration: internal clock simplifies host interface; external clock allows precise timing synchronization across multiple converters. |
| Separate analog/digital grounds and supplies | Minimizes digital switching noise coupling into analog path, preserving 87dB SNR performance in mixed-signal environments. |
| Power-down mode with data retention | Permits low-duty-cycle operation in portable or remote monitoring systems while preserving last valid conversion result for immediate readout on wake-up. |
Applications
| Industrial Process Monitoring | Multiplexed Sensor Acquisition |
|---|---|
|
Use Scenario: Continuous voltage monitoring of pressure, temperature, and flow transducers in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC digitizing ±10V analog outputs from 4–20mA loop receivers with 16-bit resolution and 200ksps aggregate throughput. Use Value: ±2LSB INL and 87dB SNR ensure accurate calibration traceability and long-term stability under industrial ambient temperature swings. |
Use Scenario: High-channel-count data loggers using analog multiplexers to cycle through dozens of thermocouple or strain gauge inputs. IC Role / Device Role / Timing Role: ADC core in each channel module, leveraging R/C and BUSY signals to coordinate with mux control logic and FIFO buffering. Use Value: 5µs throughput time and CS/R/C handshake enable deterministic sampling of 20+ channels at ≥10ksps per channel without CPU overhead. |
| PC-Based Test Equipment | DSP-Front-End Signal Conditioning |
|
Use Scenario: USB or PCIe DAQ cards for lab-grade oscilloscopes, spectrum analyzers, and automated test systems. IC Role / Device Role / Timing Role: High-fidelity front-end ADC interfaced to FPGA or microcontroller via synchronous serial link (DATACLK + DATA + SYNC). Use Value: 200ksps rate with 87dB SINAD supports 14+ ENOB for accurate FFT-based spectral analysis up to 100kHz. |
Use Scenario: Real-time vibration analysis in predictive maintenance systems using accelerometers with ±5V outputs. IC Role / Device Role / Timing Role: Precision ADC feeding fixed-point DSP; SB/BTC pin configures two's complement output for direct signed arithmetic. Use Value: Guaranteed no missing codes and ±2LSB INL prevent harmonic distortion artifacts in FFT bins critical for bearing fault detection. |
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 |
|---|---|---|---|
| ADS7809UB | 16-bit, 100ksps, 5V supply, SPI-compatible interface; no internal reference; requires external 2.5V ref. | Lacks integrated reference and higher sample rate; lower power (35mW), but needs additional ref IC and decoupling. | Select when cost-sensitive designs can accommodate external reference and tolerate 50% lower throughput. |
| AD977AARZ | 16-bit, 100ksps, 5V supply, parallel/serial interface; internal 2.5V ref; ±2LSB INL; 86dB SNR. | Slower (100ksps vs 200ksps); offers parallel interface option; identical DC specs but slightly lower AC performance. | Select when system already uses parallel bus architecture or when 100ksps suffices and board space permits larger 28-pin SOIC package. |
Compared with ADS7809UB and AD977AARZ, the LTC1609CSW#TRPBF provides double the sample rate with integrated reference and flexible serial clocking-enabling simpler, higher-performance data acquisition without external timing or reference components.
Availability
LTC1609CSW#TRPBF is available at Aetrix Electronics and suitable for industrial process control, multiplexed data acquisition systems, and high-speed PC-based test equipment requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for LTC1609CSW#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, formed through the acquisition of Linear Technology in 2017.
The LTC1609CSW#TRPBF belongs to Linear Technology's precision data acquisition product line, designed specifically for industrial, instrumentation, and embedded systems demanding high DC accuracy, low noise, and robust serial interfacing in compact SO packages.
FAQ
What input voltage ranges does the LTC1609CSW#TRPBF support?
The LTC1609CSW#TRPBF supports six factory-configured input ranges: bipolar ±10V, ±5V, ±3.3V and unipolar 0V–10V, 0V–5V, 0V–4V. These are selected by connecting R1IN, R2IN, and R3IN to AGND, VIN, or CAP with specified external resistors per Tables 1a and 1b in the datasheet. Each range has defined nominal input impedance (e.g., 22.9kΩ for ±10V) and guaranteed linearity performance.
How does the SB/BTC pin affect the output data format of the LTC1609CSW#TRPBF?
The SB/BTC pin on the LTC1609CSW#TRPBF selects between straight binary (pin high) and two's complement (pin low) output coding. Straight binary is used for unipolar ranges (e.g., 0V–10V), where 0x0000 = 0V and 0xFFFF ≈ full scale. Two's complement is used for bipolar ranges (e.g., ±10V), where 0x8000 = 0V, 0x0000 = –10V, and 0xFFFF = +10V – 1LSB. This mapping is fixed per input range configuration and cannot be changed mid-conversion.
Can the LTC1609CSW#TRPBF use an external reference, and what are the requirements?
Yes, the LTC1609CSW#TRPBF supports external reference injection at the REF pin. The device specifies 2.30V to 2.70V external reference voltage range with ≤100µA current draw at 2.5V. External references must be low-noise, low-drift (e.g., LT1019, ADR441), and bypassed with ≥2.2µF tantalum at REF and CAP. Using an external reference overrides the internal 2.5V bandgap and improves full-scale accuracy and tempco beyond factory specifications.
What is the purpose of the TAG pin on the LTC1609CSW#TRPBF?
The TAG pin on the LTC1609CSW#TRPBF serves as a serial data tag input in external clock mode (EXT/INT = high). When CS is low and R/C is high after 16-bit DATA transmission, the logic level present on TAG is shifted out as the 17th bit. This enables daisy-chaining multiple LTC1609CSW#TRPBF devices on a shared DATACLK and DATA line, allowing a host controller to identify which ADC generated each data word without additional address lines or chip-select signals.
Does the LTC1609CSW#TRPBF require external passive components for stable operation?
Yes, the LTC1609CSW#TRPBF requires specific external passives: 0.1µF ceramic + 10µF tantalum on VANA; 2.2µF tantalum on both REF and CAP; 1000pF NPO capacitor at each analog input (R1IN/R2IN/R3IN) for noise filtering; and 33.2kΩ resistor between CAP and R2IN for ±3.3V range attenuation. These values are specified in the datasheet for guaranteed AC/DC performance and must be placed close to respective pins per layout guidelines.
LTC1609CSW#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 20-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1609CSW#TRPBF FAQ
1.How can I place an order for LTC1609CSW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1609CSW#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 LTC1609CSW#TRPBF reliable?
The price and inventory of LTC1609CSW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1609CSW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1609CSW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1609CSW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1609CSW#TRPBF?
LTC1609CSW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1609CSW#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 LTC1609CSW#TRPBF?
For technical support, including LTC1609CSW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1609CSW#TRPBF requirements.
6.How does Aetrix verify that LTC1609CSW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1609CSW#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 LTC1609CSW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1609CSW#TRPBF?
All LTC1609CSW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1609CSW#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 LTC1609CSW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1609CSW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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