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Analog Devices Inc. LTC1605-2CG#PBF
- Part No.:
- LTC1605-2CG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1605-2CG#PBF.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,159
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Product details
Overview
LTC1605-2CG#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 100ksps successive approximation ADC with bipolar ±4V input range, internal 2.5V reference and trimmed clock, operating from a single 5V supply and consuming 55mW typical power. It delivers 87dB SINAD and ±3 LSB integral nonlinearity for precision industrial data acquisition.
For engineers reviewing the LTC1605-2CG#PBF datasheet, LTC1605-2CG#PBF pinout, LTC1605-2CG#PBF application, or LTC1605-2CG#PBF equivalent, key selection criteria include bipolar input support, 28-pin SSOP package compatibility, parallel 16-bit output timing, and internal reference accuracy over temperature.
Technical Context
The LTC1605-2CG#PBF implements a switched-capacitor SAR architecture with auto-zeroed comparator and 16-bit capacitive DAC. Its internal 2.5V bandgap reference is curvature-corrected and factory-trimmed to ±10mV zero error, enabling ±4V full-scale input without external components.
Conversion is initiated by R/C or CS falling edge, with BUSY indicating active conversion and data valid on BUSY rising edge. The device supports byte-mode output via BYTE pin and operates with 8µs conversion time and 2µs acquisition time at 100ksps throughput.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes for high-fidelity signal digitization |
| Sampling Rate | 100ksps - supports real-time capture of signals up to 275kHz full-power bandwidth |
| Analog Input Range | ±4V - enables direct interface to bipolar sensor outputs and industrial transducers |
| SINAD | 87dB typ - ensures >14-bit effective resolution in dynamic applications |
| Power Dissipation | 55mW typ at 5V - allows integration into thermally constrained systems without forced cooling |
| Integral Linearity | ±3 LSB max - guarantees monotonicity and <0.05% full-scale error for calibration-sensitive designs |
| Reference Voltage | 2.500V ±10mV - provides stable scaling for repeatable measurements across 0°C to 70°C ambient |
Pinout & Package
Package: 28-lead plastic SSOP (G package), exposed pad soldered to PCB ground for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Analog Input | Accepts ±4V differential input; requires 200Ω series resistor for overvoltage protection and settling |
| AGND1 (2), AGND2 (5) | Analog Ground | Separate analog return paths minimize digital noise coupling into sensitive input stage |
| REF (3) | 2.5V Reference Output | Provides factory-trimmed reference; bypass with 2.2µF tantalum for low-noise operation |
| CAP (4) | Reference Buffer Output | Drives internal DAC; capable of <2mA DC load but not recommended for AC loading |
| D15–D0 (6–13, 15–22) | Parallel Data Outputs | Three-state 16-bit bus; MSB/LSB order configurable via BYTE pin for microprocessor alignment |
| BUSY (26) | Conversion Status | Active-low open-drain signal; rising edge indicates valid data ready for latching |
| R/C (24) | Read/Convert Control | Falling edge initiates conversion when CS is low; rising edge enables data output |
| CS (25) | Chip Select | Enables device; falling edge starts conversion if R/C is low, or enables output if R/C is high |
| VANA (27), VDIG (28) | Supply Inputs | 5V analog and digital supplies; require 0.1µF ceramic + 10µF tantalum decoupling per supply |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar ±4V input range | Eliminates need for external level-shifting circuitry when interfacing to ±10V industrial sensors or op-amp outputs |
| Internal 2.5V reference with ±5ppm/°C tempco | Reduces BOM count and layout area while maintaining <0.01% gain drift over 0°C–70°C |
| 8µs conversion + 2µs acquisition time | Guarantees 100ksps sustained throughput without pipeline latency or dead-time penalties |
| Two-byte parallel output with BYTE control | Enables flexible interface to 8-bit microcontrollers or DSPs without external latch logic |
| Overvoltage protected inputs (±25V) | Survives transient faults in industrial environments without external clamping diodes |
Applications
| Industrial Process Control | Multiplexed Data Acquisition Systems |
|---|---|
Use Scenario: Digitizing 4–20mA current loop outputs from pressure, temperature, and flow transmitters in PLC I/O modules. IC Role / Device Role / Timing Role: Precision ADC front-end converting analog field signals to 16-bit digital values synchronized to system scan cycle. Use Value: ±3 LSB INL and 87dB SINAD ensure <0.05% measurement uncertainty across temperature, meeting SIL-2 functional safety requirements. | Use Scenario: High-channel-count DAQ systems using analog multiplexers to share one ADC across 16+ sensor inputs. IC Role / Device Role / Timing Role: Central sampling engine with fast 2µs acquisition time enabling <10µs per channel at 100ksps aggregate rate. Use Value: Internal reference and auto-zeroing eliminate per-channel calibration, reducing firmware complexity and test time. |
| High-Speed PC-Based Data Acquisition | Digital Signal Processing Front-End |
Use Scenario: USB or PCIe DAQ cards acquiring vibration, audio, or acoustic emission signals at up to 100ksps. IC Role / Device Role / Timing Role: Low-latency ADC with BUSY-driven handshaking for deterministic data transfer to host FIFOs. Use Value: 8µs conversion time and parallel 16-bit bus enable real-time streaming without DMA bottlenecks or CPU overhead. | Use Scenario: Pre-processing stage before FPGA or DSP for spectral analysis, filtering, or motor control feedback loops. IC Role / Device Role / Timing Role: High-SNR signal digitizer feeding time-domain samples to FFT or FIR engines with minimal quantization noise. Use Value: 87dB SINAD and 275kHz full-power bandwidth preserve signal integrity for accurate frequency-domain representation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, SPI interface, external reference required, no internal clock | Higher speed but serial interface increases controller overhead; lacks integrated reference and bipolar input support | Select when >100ksps sampling or SPI-based architecture is mandatory; accept added reference and driver design effort |
| MAX11902ETX+ | 16-bit, 100ksps, ±5V input range, internal reference, SPI-only interface | Same speed and bipolar capability but no parallel bus; requires software-controlled read sequencing | Choose for space-constrained designs where SPI simplifies routing, but verify timing margins for real-time data capture |
Compared with ADS8860IDRCT and MAX11902ETX+, the LTC1605-2CG#PBF uniquely combines parallel 16-bit output, ±4V input, internal reference, and self-contained clock in a single 28-pin SSOP-reducing interface logic, reference design, and layout complexity for embedded industrial systems.
Availability
LTC1605-2CG#PBF is available at Aetrix Electronics and suitable for industrial process control, multiplexed data acquisition systems, and high-speed PC-based DAQ requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC1605-2CG#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 acquired Linear Technology in 2017 and maintains its high-precision analog portfolio, emphasizing performance, reliability, and application-specific integration for demanding industrial and instrumentation markets.
The LTC1605-2CG#PBF belongs to Linear's legacy high-resolution SAR ADC family, designed specifically for embedded data acquisition systems requiring low power, single-supply operation, and guaranteed monotonicity without external calibration.
FAQ
What is the input voltage range supported by the LTC1605-2CG#PBF?
The LTC1605-2CG#PBF supports a true bipolar analog input range of ±4V referenced to AGND. This is fixed by its internal 2.5V reference and 1.6× scaling factor, enabling direct connection to ±10V op-amp outputs or industrial transducers without external level-shifting. Absolute maximum input is ±25V, providing robust overvoltage tolerance.
Does the LTC1605-2CG#PBF require an external clock source?
No, the LTC1605-2CG#PBF includes a fully trimmed internal clock that guarantees 100ksps sampling without any external timing components. The internal oscillator drives both the sample-and-hold and SAR logic, eliminating clock jitter concerns and reducing system-level BOM count. External clocking is not supported.
How is data output formatted from the LTC1605-2CG#PBF?
The LTC1605-2CG#PBF outputs data in two's complement format for bipolar interpretation, with D15 as sign bit. It supports either 16-bit parallel output (D15–D0) or byte-mode access via the BYTE pin: BYTE low outputs MSBs on D15–D8 and LSBs on D7–D0; BYTE high swaps byte order for 8-bit bus compatibility.
Can the LTC1605-2CG#PBF operate with an external reference?
Yes, the LTC1605-2CG#PBF allows external reference substitution via the REF pin. When an external reference is applied, the internal reference is disabled, and linearity specifications remain valid provided the external reference meets 2.30V–2.70V range and ≤100µA sink capability. This enables improved temperature stability using ovenized or TCXO-referenced sources.
What package type and lead finish does the LTC1605-2CG#PBF use?
The LTC1605-2CG#PBF uses a 28-lead plastic SSOP (G package) with lead-free (Pb-free) finish and RoHS-compliant termination. The exposed pad must be soldered to PCB ground for optimal thermal dissipation and noise immunity. It is rated for 0°C to 70°C ambient operation and is compatible with standard reflow profiles.
LTC1605-2CG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- 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:
- -
LTC1605-2CG#PBF FAQ
1.How can I place an order for LTC1605-2CG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1605-2CG#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 LTC1605-2CG#PBF reliable?
The price and inventory of LTC1605-2CG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1605-2CG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1605-2CG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1605-2CG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1605-2CG#PBF?
LTC1605-2CG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1605-2CG#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 LTC1605-2CG#PBF?
For technical support, including LTC1605-2CG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1605-2CG#PBF requirements.
6.How does Aetrix verify that LTC1605-2CG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1605-2CG#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 LTC1605-2CG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1605-2CG#PBF?
All LTC1605-2CG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1605-2CG#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 LTC1605-2CG#PBF part is unused and in its original packaging.
Return procedure for LTC1605-2CG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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