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Analog Devices Inc. LTC1605CG#PBF
- Part No.:
- LTC1605CG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1605CG#PBF.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,926
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Product details
Overview
LTC1605CG#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 100ksps sampling analog-to-digital converter with ±10V bipolar input range, internal 2.5V reference, and parallel 16-bit two's complement output. It operates from a single 5V supply, draws 55mW typical power, and delivers ±2.0LSB integral nonlinearity and 87.5dB SINAD at 1kHz - used in industrial data acquisition systems requiring high DC accuracy and moderate speed.
For engineers reviewing the LTC1605CG#PBF datasheet, LTC1605CG#PBF pinout, LTC1605CG#PBF application, or LTC1605CG#PBF equivalent, key selection criteria include guaranteed no missing codes over temperature, microprocessor-compatible parallel interface timing (BUSY/CS/R/C), internal clock synchronization, and ±25V input overvoltage protection for rugged signal conditioning front-ends.
Technical Context
The LTC1605CG#PBF implements a switched-capacitor successive approximation architecture with integrated sample-and-hold, precision bandgap reference, and trimmed internal clock - eliminating external timing components. Its dual ground structure (AGND1, AGND2, DGND) and separate analog/digital supplies (VANA, VDIG) support high PSRR and low digital noise coupling into the conversion path.
It supports two data read modes: full 16-bit parallel output (D15–D0) or byte-swapped 8-bit reads via the BYTE control pin. Conversion is initiated by edge-triggered CS and R/C signals, with BUSY indicating active conversion and data validity synchronized to its rising edge - enabling direct interfacing with FIFOs, DSPs, and microcontrollers without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high dynamic range measurement |
| Sampling Rate | 100ksps - supports real-time capture of signals up to 275kHz full-power bandwidth |
| Input Range | ±10V bipolar - compatible with standard industrial sensor outputs and op-amp signal chains |
| INL | ±2.0LSB max - ensures monotonicity and <0.003% linearity error across full temperature range |
| Power Dissipation | 55mW typical at 5V - enables thermally constrained embedded designs without forced cooling |
| SINAD | 87.5dB typ at 1kHz - corresponds to ~14.5 effective bits, suitable for precision instrumentation |
| Reference | Internal 2.500V ±5ppm/°C - eliminates need for external reference unless higher tempco stability required |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0°C to 70°C operating temperature range, exposed pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Analog Input | ±10V differential input node; protected to ±25V; requires 200Ω series resistor per datasheet layout |
| AGND1 (2), AGND2 (5) | Analog Ground | Separate low-noise return paths for reference and input circuitry; must tie to analog ground plane |
| REF (3) | Reference Output | 2.5V bandgap reference source; bypass with 2.2µF tantalum capacitor to suppress noise |
| CAP (4) | Reference Buffer Output | Unity-gain buffered 2.5V output driving internal DAC; decouple with 2.2µF tantalum |
| D15–D0 (6–13, 15–22) | Three-State Data Outputs | 16-bit parallel two's complement output; Hi-Z when CS high or R/C low |
| BUSY (26) | Status Output | Active-low during conversion; rising edge indicates valid data ready for latching |
| R/C (24) | Read/Convert Control | Falling edge (with CS low) initiates conversion; rising edge enables data output |
| CS (25) | Chip Select | Enables device; falling edge (with R/C low) starts conversion; rising edge releases bus |
| BYTE (23) | Data Format Control | Low = D15–D8 (MSB), D7–D0 (LSB); High = D7–D0 (MSB), D15–D8 (LSB) |
| VANA (27), VDIG (28) | Analog/Digital Supplies | Both require 4.75V–5.25V; VDIG tied directly to VANA; each bypassed with 0.1µF + 10µF |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed No Missing Codes | 16-bit monotonic operation over full 0°C to 70°C range - eliminates code dropout in closed-loop control |
| Internal Synchronized Clock | Factory-trimmed oscillator enables fixed 100ksps throughput without external crystal or timing components |
| Overvoltage Protected Inputs | Withstands ±25V on VIN without latch-up - simplifies front-end protection design for field-connected sensors |
| Two-Byte Read Capability | BYTE pin selects MSB-first or LSB-first 8-bit bus access - eases integration with 8-bit microcontrollers |
| Trimmed Offset & Full-Scale | Factory-calibrated with external trim resistors (R3/R4) - enables sub-LSB system-level calibration |
Applications
| Industrial Process Control | Multiplexed Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring pressure, temperature, and flow transmitters in PLC I/O modules with ±10V analog inputs. IC Role / Device Role / Timing Role: Primary ADC digitizing multiple sensor channels via multiplexer; 100ksps rate supports >10-channel scanning at >10ksps/channel. Use Value: ±2.0LSB INL and no missing codes ensure accurate setpoint tracking and PID loop stability over temperature. | Use Scenario: Simultaneous sampling of 8–16 sensor channels using analog multiplexers and sample-and-hold circuits. IC Role / Device Role / Timing Role: High-accuracy back-end ADC with BUSY-synchronized readout; BYTE pin enables flexible 8-bit bus sharing across channels. Use Value: Internal 2.5V reference and ±10V range eliminate external scaling, reducing BOM count and layout complexity. |
| High-Speed PC-Based DAQ | Digital Signal Processing Front-End |
Use Scenario: USB or PCIe-based data acquisition cards for lab test equipment requiring 16-bit resolution at ≥50ksps. IC Role / Device Role / Timing Role: Parallel-output ADC interfaced to FPGA or microcontroller with FIFO buffering; BUSY signal manages data flow control. Use Value: 87.5dB SINAD and 275kHz full-power bandwidth support clean spectral analysis of audio and vibration signals. | Use Scenario: Real-time signal conditioning stage feeding FPGAs or DSPs in motor control or power quality analyzers. IC Role / Device Role / Timing Role: Precision analog front-end ADC with two's complement output directly compatible with signed arithmetic pipelines. Use Value: Internal clock synchronization and deterministic 8µs conversion time enable tight timing alignment with DSP processing cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7805UB | 16-bit, 100ksps, ±10V input, but requires external reference and clock; no internal sample-and-hold | Higher board-level design effort due to external timing and reference components | Select when external clock synchronization or custom reference voltage is required |
| AD976ARZ | 16-bit, 100ksps, ±10V input, internal reference, but uses serial interface (SPI) instead of parallel | Reduces pin count and PCB routing complexity, but increases software overhead for data capture | Select for space-constrained designs where microcontroller SPI resources are available |
Compared with ADS7805UB and AD976ARZ, the LTC1605CG#PBF provides the lowest system integration burden - combining internal clock, reference, sample-and-hold, and parallel interface in one SSOP package - making it optimal for cost-sensitive, high-accuracy industrial DAQ where minimal external components are critical.
Availability
LTC1605CG#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 support, and traceable sourcing.
Supply support for LTC1605CG#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, 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 LTC1605CG#PBF belongs to ADI's legacy Linear Technology precision data conversion product line, designed specifically for industrial and instrumentation applications demanding high DC accuracy, robust input protection, and simplified system integration.
FAQ
What is the operating temperature range for the LTC1605CG#PBF?
The LTC1605CG#PBF is specified for an operating ambient temperature range of 0°C to 70°C, as indicated by the "C" grade suffix in the part number. This grade guarantees all electrical specifications - including ±2.0LSB INL, 100ksps sampling, and ±10V input range - across that full industrial temperature span without derating.
Does the LTC1605CG#PBF require an external clock source?
No, the LTC1605CG#PBF does not require an external clock source. It integrates a factory-trimmed internal clock that delivers a typical conversion time of 8µs and ensures a stable 100ksps sampling rate. The internal clock eliminates timing jitter from external sources and reduces system component count - a key advantage over alternatives like the ADS7805UB.
How is the LTC1605CG#PBF's analog input protected against overvoltage?
The LTC1605CG#PBF analog input (VIN) is rated for ±25V absolute maximum voltage, exceeding its ±10V full-scale range. Internal clamping diodes safely shunt transient currents above this threshold without latch-up, provided input current remains below 100mA. This allows direct connection to industrial field wiring with only a 200Ω series resistor - no external TVS or op-amp clamp needed in many cases.
Can the LTC1605CG#PBF operate with an external reference voltage?
Yes, the LTC1605CG#PBF supports external reference operation. When an external 2.30V–2.70V reference is applied to the REF pin, the internal bandgap reference is overridden, enabling improved temperature stability or system-level calibration. The device maintains ±2.0LSB INL and no missing codes under external reference conditions, as verified in the converter characteristics table.
What is the purpose of the BYTE pin on the LTC1605CG#PBF?
The BYTE pin on the LTC1605CG#PBF controls data bus organization during 8-bit read operations. When BYTE is low, D15–D8 carry the MSB byte and D7–D0 carry the LSB byte. When BYTE is high, their positions swap - allowing seamless interfacing with 8-bit microcontrollers that lack native 16-bit bus width, while preserving two's complement format integrity across both bytes.
LTC1605CG#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:
- -
LTC1605CG#PBF FAQ
1.How can I place an order for LTC1605CG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1605CG#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 LTC1605CG#PBF reliable?
The price and inventory of LTC1605CG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1605CG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1605CG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1605CG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1605CG#PBF?
LTC1605CG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1605CG#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 LTC1605CG#PBF?
For technical support, including LTC1605CG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1605CG#PBF requirements.
6.How does Aetrix verify that LTC1605CG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1605CG#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 LTC1605CG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1605CG#PBF?
All LTC1605CG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1605CG#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 LTC1605CG#PBF part is unused and in its original packaging.
Return procedure for LTC1605CG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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