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Analog Devices Inc. LTC1608ACG#TRPBF
- Part No.:
- LTC1608ACG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1608ACG#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,884
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Product details
Overview
LTC1608ACG#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 500ksps successive-approximation ADC with differential input, internal ±2.5V bipolar range, 90dB SINAD, –100dB THD, and 5MHz full-power bandwidth. It integrates sample-and-hold, precision 2.5V reference, and 16-bit parallel µP-compatible output - used in high-speed data acquisition systems requiring no pipeline delay and guaranteed no missing codes over temperature.
For engineers reviewing the LTC1608ACG#TRPBF datasheet, LTC1608ACG#TRPBF pinout, LTC1608ACG#TRPBF application, or LTC1608ACG#TRPBF equivalent, key selection criteria include its true differential input architecture (68dB CMRR), dual shutdown modes (7mW Nap / 10µW Sleep), ±5V supply operation, and compatibility with 3V/5V digital interfaces via dedicated OVDD.
Technical Context
The LTC1608ACG#TRPBF implements a capacitor-based successive approximation register (SAR) architecture with integrated differential sample-and-hold, factory-trimmed internal clock (1.45µs typical conversion time), and two-stage zeroing switch calibration to null comparator offset. Its analog front-end supports simultaneous sampling of AIN+ and AIN– with 15MHz small-signal bandwidth and 350kHz linear bandwidth (SINAD ≥ 84dB).
Digital interface uses three control lines - CS (chip select), CONVST (edge-triggered conversion start), and RD (data read) - with BUSY indicating conversion status. Output drivers are three-state, powered by separate OVDD, enabling interoperability with both 3V and 5V logic families while maintaining two's complement binary format.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes over 0°C to 70°C operating range |
| Sampling Rate | 500ksps maximum; throughput time ≤ 2µs (acquisition + conversion) |
| SINAD / THD | 90dB / –100dB at 5kHz input; 84dB / –91dB at 100kHz - defines usable dynamic range for spectral analysis |
| Input Range | ±2.5V differential; supports single-ended operation with AIN– grounded |
| Power Modes | Active (270mW), Nap (7mW), Sleep (10µW); SHDN/CS combination selects mode |
| Reference | Internal 2.5V bandgap (±15ppm/°C tempco); external reference supported via VREF pin |
| CMRR | 68dB up to 100kHz - enables rejection of ground-loop noise in sensor measurement |
Pinout & Package
Package: 36-lead plastic SSOP (G package), 0.209" body width, 0.025" lead pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– (1, 2) | Differential analog inputs | Simultaneously sampled; support ±2.5V differential or single-ended input with common-mode voltage up to ±2.5V |
| VREF (3) | 2.5V reference output | Internally buffered; bypass with 2.2µF tantalum + 0.1µF ceramic to AGND |
| REFCOMP (4) | Reference compensation node | Requires 22µF tantalum + 0.1µF ceramic bypass; not suitable as external reference source |
| AGND (5–8) | Analog ground terminals | Must connect to low-noise analog ground plane; all four pins carry return current for analog circuitry |
| DVDD (9), DGND (10) | Digital logic supply/ground | Power internal timing and control logic; DVDD = 5V, bypassed to DGND |
| D15–D0 (11–26) | 16-bit parallel data outputs | Three-state, MSB-first, two's complement format; driven by OVDD-supplied output buffers |
| BUSY (27) | Conversion status indicator | Active-low; data valid on rising edge; synchronizes read timing with conversion completion |
| OGND, OVDD (28, 29) | Output driver ground/supply | Isolate output switching noise from logic/digital supplies; enable 3V/5V interface compatibility |
| RD (30) | Data read strobe | Low enables output drivers when CS is low; controls bus access in shared-data applications |
| CONVST (31) | Conversion start trigger | Falling-edge initiated; must be held low ≥40ns; timing-critical for bit decision integrity |
| CS (32) | Chip select | Enables CONVST and RD recognition; determines shutdown mode when combined with SHDN |
| SHDN (33) | Power shutdown control | Low activates shutdown; CS state selects Nap (CS low) or Sleep (CS high) |
| VSS (34) | Negative analog supply | –5V nominal; bypassed to AGND with 10µF tantalum + 0.1µF ceramic |
| AVDD (35, 36) | Positive analog supply | 5V nominal; both pins require individual bypassing and interconnection via 10Ω resistor |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Enables rejection of common-mode noise up to 68dB without external instrumentation amplifiers |
| No pipeline delay | Delivers first valid conversion result within one sample period - critical for real-time closed-loop control |
| Dual low-power shutdown modes | Nap mode (7mW) retains reference and logic state for <200ns wake-up; Sleep mode (10µW) eliminates bias currents |
| 3V/5V digital interface compatibility | Dedicated OVDD pin allows direct connection to mixed-voltage systems without level shifters |
| Guaranteed no missing codes | Valid across full 0°C to 70°C temperature range - ensures monotonicity in precision measurement |
Applications
| Telecommunications Test Equipment | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Capturing wideband RF IF signals in spectrum analyzers and vector signal analyzers. IC Role / Device Role / Timing Role: High-fidelity digitization stage with 5MHz full-power bandwidth and 90dB SINAD at 500ksps. Use Value: Preserves signal integrity for accurate modulation error ratio (MER) and EVM measurements without interpolation artifacts. | Use Scenario: Real-time acquisition of sensor data for adaptive filtering and beamforming algorithms in FPGA/DSP-based systems. IC Role / Device Role / Timing Role: Synchronous sampling front-end with deterministic latency and no pipeline delay. Use Value: Enables precise time alignment between multiple channels and simplifies timing-critical firmware development. |
| Multiplexed Data Acquisition Systems | Imaging System Digitization |
Use Scenario: Scanning multi-channel industrial sensors (strain gauges, thermocouples) using analog multiplexing before ADC input. IC Role / Device Role / Timing Role: High-resolution digitizer with fast acquisition time (400ns) and low input leakage (±1µA). Use Value: Minimizes crosstalk and settling errors during channel switching, supporting >100-channel systems at full throughput. | Use Scenario: Converting analog video outputs from CCD/CMOS line-scan cameras in medical or industrial inspection equipment. IC Role / Device Role / Timing Role: Low-distortion digitizer with –100dB THD and 350kHz linear bandwidth. Use Value: Maintains grayscale fidelity and reduces harmonic artifacts in high-contrast imaging applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8588SIPM | 8-channel simultaneous-sampling, 16-bit, 100ksps; SPI interface; no internal reference; requires external REF | Targeted at multi-channel synchronized acquisition, not single-channel high-throughput | Select when channel count >1 and synchronization across inputs is required; avoid for standalone 500ksps single-channel use |
| AD7606CCPZ-RL | 8-channel, 16-bit, 200ksps; parallel/serial interface; internal reference; ±10V input range option | Optimized for industrial PLC I/O modules with higher input voltage tolerance and integrated protection | Select for ruggedized industrial environments needing ±10V range and integrated overvoltage protection; lower speed than LTC1608ACG#TRPBF |
Compared with ADS8588SIPM and AD7606CCPZ-RL, the LTC1608ACG#TRPBF delivers highest single-channel throughput (500ksps) with lowest THD (–100dB) and built-in differential input rejection - making it optimal for precision wideband signal capture where latency, noise floor, and common-mode immunity are prioritized over channel count or industrial ruggedness.
Availability
LTC1608ACG#TRPBF is available at Aetrix Electronics and suitable for telecommunications test equipment, digital signal processing front-ends, and multiplexed data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1608ACG#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1608ACG#TRPBF belongs to ADI's legacy Linear Technology precision data converter product line, designed specifically for high-speed, high-dynamic-range applications demanding low distortion, guaranteed monotonicity, and robust analog input handling in demanding measurement environments.
FAQ
What is the operating temperature range for the LTC1608ACG#TRPBF?
The LTC1608ACG#TRPBF is specified for the commercial temperature range of 0°C to 70°C. This grade (denoted by the "C" suffix) guarantees full performance including no missing codes, ±0.5 LSB integral linearity, and 90dB SINAD across that range. The "A" prefix indicates improved AC specifications versus the base LTC1608CG, particularly in THD and SFDR.
Does the LTC1608ACG#TRPBF require an external clock source?
No, the LTC1608ACG#TRPBF does not require an external clock. It contains a factory-trimmed internal clock that delivers a typical conversion time of 1.45µs and guarantees 500ksps throughput. The internal clock eliminates timing jitter from external sources and simplifies system design - only CONVST, CS, and RD control signals are needed for full operation.
How does the LTC1608ACG#TRPBF handle power-down modes, and what are the wake-up times?
The LTC1608ACG#TRPBF offers two hardware-controlled shutdown modes: Nap mode (7mW, CS low + SHDN low) wakes up in ≤200ns, retaining reference and logic state; Sleep mode (10µW, CS high + SHDN low) requires longer wake-up due to reference settling - ~80ms with the recommended 22µF REFCOMP capacitor. Both modes eliminate the need for software reinitialization.
Can the LTC1608ACG#TRPBF interface directly with a 3V microprocessor?
Yes, the LTC1608ACG#TRPBF supports direct 3V interface via its dedicated OVDD pin (Pin 29), which powers the D15–D0 and BUSY output drivers. Digital inputs (CS, CONVST, RD, SHDN) accept 3V logic levels, and the output swing is set by OVDD - allowing seamless connection to 3V processors without level-shifting circuitry while maintaining signal integrity.
What is the significance of the "G" and "A" in LTC1608ACG#TRPBF?
The "G" denotes the 36-lead SSOP package; the "A" indicates enhanced AC performance - specifically tighter THD (–100dB vs –95dB typical) and SFDR (94dB vs 90dB) specifications compared to the standard LTC1608CG. The "C" specifies the 0°C to 70°C temperature grade, and "#TRPBF" indicates tape-and-reel packaging with lead-free (Pb-free) finish.
LTC1608ACG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Differential, 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:
- 36-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1608ACG#TRPBF FAQ
1.How can I place an order for LTC1608ACG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1608ACG#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 LTC1608ACG#TRPBF reliable?
The price and inventory of LTC1608ACG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1608ACG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1608ACG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1608ACG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1608ACG#TRPBF?
LTC1608ACG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1608ACG#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 LTC1608ACG#TRPBF?
For technical support, including LTC1608ACG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1608ACG#TRPBF requirements.
6.How does Aetrix verify that LTC1608ACG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1608ACG#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 LTC1608ACG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1608ACG#TRPBF?
All LTC1608ACG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1608ACG#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 LTC1608ACG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1608ACG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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