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Analog Devices Inc. LTC2385IUH-16#TRPBF
- Part No.:
- LTC2385IUH-16#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2385IUH-16#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,636
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Product details
Overview
LTC2385IUH-16#TRPBF from Analog Devices (acquired Linear Technology) is a 16-bit, 5 Msps successive approximation register (SAR) analog-to-digital converter with serial LVDS interface, ±0.5 LSB INL (max), 93.8 dB SNR at 1 MHz input, and 78 mW power dissipation - designed for high-speed imaging, instrumentation, and control-loop applications requiring no pipeline latency.
For engineers reviewing the LTC2385IUH-16#TRPBF datasheet, LTC2385IUH-16#TRPBF pinout, LTC2385IUH-16#TRPBF application, or LTC2385IUH-16#TRPBF equivalent, key selection considerations include differential ±4.096 V input range, internal 2.048 V reference with ±20 ppm/°C drift, 32-pin 5 mm × 5 mm QFN package, and support for one-lane/two-lane LVDS output modes.
Technical Context
The LTC2385IUH-16#TRPBF implements a true SAR architecture with no pipeline delay, enabling deterministic timing for closed-loop control. Its acquisition phase uses switched-capacitor sampling with 18 pF sample capacitance and 28 Ω switch on-resistance, followed by binary-weighted charge redistribution against VREFBUF/2n.
Digital interface operates via LVDS: CLK+/CLK– accepts external sampling clock; DCO+/- echoes clock for data capture; DA+/- outputs 16-bit two's complement data in one-lane (16 clocks) or two-lane (8 clocks) mode; TWOLANES pin configures lane count; PD enables 10 μW power-down state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees full-scale quantization into 65,536 discrete levels with no missing codes. |
| Sampling Rate | 5 Msps - supports Nyquist input bandwidth up to 2.5 MHz without aliasing. |
| INL (Max) | ±0.5 LSB - ensures monotonicity and <0.008% full-scale linearity error over temperature. |
| SNR (Typ) | 93.8 dB at fIN = 1 MHz - corresponds to effective resolution of ~15.3 bits for high-fidelity signal capture. |
| Power Dissipation | 78 mW at 5 Msps - enables high-speed operation within thermal limits of compact PCB layouts. |
| Reference | Internal 2.048 V ±0.25% initial accuracy, ±20 ppm/°C max drift - eliminates need for external precision reference in many applications. |
| Differential Input Range | ±4.096 V - supports direct interfacing with industrial ±10 V or ±5 V signal chains via appropriate scaling. |
Pinout & Package
Package: 32-lead (5 mm × 5 mm) plastic QFN (UH), exposed pad (Pin 33) must be soldered to PCB ground plane. Thermal resistance θJA = 34°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 10, 21, 26, 29) | Ground reference | Multiple low-inductance connections required to solid ground plane; critical for noise immunity and thermal conduction. |
| IN+, IN– (Pins 2, 3) | Differential analog inputs | Accept fully differential ±4.096 V swing centered at VCM = 2.048 V; require matched layout and 180° phase drive. |
| REFGND (Pins 5, 6) | Reference ground return | Must be shorted together and connected directly to exposed pad; separates reference current path from digital/analog GND. |
| REFBUF (Pins 7, 8) | 2× buffered reference output | Provides 4.096 V (nominal); bypassed with 10 µF X7R capacitor to REFGND; disable by tying REFIN to GND. |
| REFIN (Pin 9) | Internal reference output / external reference input | Outputs 2.048 V (nominal); accepts external 2.048 V reference for improved accuracy; bypass with ≥0.1 µF to GND. |
| VDD (Pins 11, 12) | 5 V analog supply | 4.75–5.25 V range; requires 0.1 µF + 10 µF ceramic decoupling per pin to minimize supply noise coupling. |
| PD (Pin 13) | Power-down enable | Active-low; reduces total supply current to 10 µW when asserted; OVDD-referenced logic level. |
| TESTPAT (Pin 14) | LVDS test pattern enable | High forces fixed LVDS output pattern for interface validation; low enables normal ADC data output. |
| DA+/DA–, DB+/DB– (Pins 15–18) | LVDS serial data outputs | DA+/DA– always active; DB+/DB– enabled only in two-lane mode (TWOLANES = high); each pair drives 100 Ω differential load. |
| DCO+/DCO– (Pins 19, 20) | LVDS data clock output | Echoes CLK+/CLK– with minimal skew; used to latch DA/DB data at receiver; 247–454 mV differential swing. |
| OVDD (Pin 22) | 2.5 V LVDS output supply | 2.375–2.625 V range; powers LVDS drivers; bypass with 0.1 µF ceramic capacitor to GND. |
| CLK+/CLK– (Pins 23, 24) | LVDS sampling clock input | Differential 5 MHz clock input; 175–650 mV differential swing; common-mode range 0.8–1.7 V. |
| TWOLANES (Pin 25) | Output lane configuration | High enables two-lane mode (8-bit parallel LVDS words); low selects one-lane (16-bit serial); VDDL-referenced logic. |
| CNV+/CNV– (Pins 27, 28) | Differential conversion start | Rising edge on CNV+ initiates sample-to-hold transition; supports single-ended drive (CNV– tied to GND). |
| VDDL (Pins 30, 31) | 2.5 V digital/logic supply | 2.375–2.625 V range; powers control logic and LVDS receivers; requires 0.1 µF + 10 µF decoupling. |
| VCM (Pin 32) | Common-mode output | Provides 2.048 V bias for IN+/IN–; optional - bypass with 0.1 µF if used; parasitic capacitance <10 pF acceptable if unused. |
| Exposed Pad (Pin 33) | Thermal & electrical ground | Must be soldered to PCB ground plane using multiple thermal vias; primary path for heat dissipation and low-impedance GND return. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline latency | Enables real-time feedback in servo control loops with deterministic tCONV = 88–101 ns and zero cycle delay between sample and result. |
| Serial LVDS interface | Reduces pin count vs parallel interfaces while maintaining signal integrity at 5 Msps; supports flexible one/two-lane data packing. |
| Integrated 2.048 V reference | Eliminates external reference component cost and board space; ±20 ppm/°C drift meets industrial temperature requirements (–40°C to +85°C). |
| Guaranteed 16-bit no-missing-codes | Ensures monotonic transfer function across full operating range - critical for closed-loop stability and precision measurement. |
| Low distortion at high frequency | 101 dB SFDR at 1 MHz input enables wide dynamic range in communications and spectral analysis applications. |
Applications
| High-Speed Imaging | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Digitizing fast-rising transient waveforms from CCD/CMOS sensors or laser pulse detectors in medical or scientific imaging systems. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 16-bit samples at 5 Msps with no latency to preserve temporal fidelity of sub-microsecond events. Use Value: 93.8 dB SNR and 101 dB SFDR ensure accurate reconstruction of low-amplitude image detail amid high-frequency noise. | Use Scenario: High-precision voltage/current stimulus-response measurement in semiconductor wafer probers and functional testers. IC Role / Device Role / Timing Role: Precision digitizer for DC/low-frequency calibration and AC parametric testing up to 2.5 MHz Nyquist bandwidth. Use Value: ±0.5 LSB INL and guaranteed no-missing-codes enable traceable metrology-grade measurements without interpolation errors. |
| Real-Time Control Loops | Communications Signal Analysis |
Use Scenario: Closed-loop position/velocity control in industrial servos where ADC latency directly impacts loop stability margin. IC Role / Device Role / Timing Role: Deterministic, zero-latency ADC feeding FPGA/DSP controllers; conversion completes within 101 ns of CNV+ edge. Use Value: Eliminates pipeline-induced phase lag, allowing higher control bandwidth and tighter PID tuning without instability risk. | Use Scenario: Baseband I/Q sampling in software-defined radio receivers or spectrum analyzers requiring wide instantaneous bandwidth. IC Role / Device Role / Timing Role: High-SNR, low-distortion front-end ADC capturing 5 Msps complex baseband signals with 200 MHz input bandwidth. Use Value: –100 dB THD at 1 MHz and 200 MHz –3 dB bandwidth support clean capture of multi-tone modulated signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IRGET | 16-bit, 1 Msps, SPI interface, 1.8 V supply, no internal reference - requires external REF and level-shifting for LVDS compatibility. | Lower throughput and no LVDS limit suitability for high-channel-count, lower-bandwidth ATE or portable instrumentation. | Select when system-level power budget (<25 mW) or small-outline packaging (20-pin VQFN) outweighs speed and interface requirements. |
| AD7960BCPZ | 18-bit, 5 Msps, LVDS interface, ±0.75 LSB INL (max), 2.5 V supply only, no internal reference - requires external 2.048 V REF and 2.5 V OVDD/VDDL. | Higher resolution but looser linearity and no integrated reference increase BOM count and layout complexity for precision applications. | Select when 18-bit resolution is mandatory and external reference design rigor can be applied to meet INL/SFDR targets. |
Compared with ADS8860IRGET and AD7960BCPZ, the LTC2385IUH-16#TRPBF uniquely combines 5 Msps throughput, integrated 2.048 V reference, ±0.5 LSB INL, and LVDS interface in a single 5 mm × 5 mm QFN - reducing system-level design effort for time-critical, medium-resolution applications.
Availability
LTC2385IUH-16#TRPBF is available at Aetrix Electronics and suitable for high-speed imaging, automated test equipment, and real-time control loop applications requiring stable component supply across extended industrial temperature ranges.
Supply support for LTC2385IUH-16#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 LTC2385IUH-16#TRPBF belongs to ADI's legacy Linear Technology high-speed precision ADC product line, engineered specifically for applications demanding low latency, excellent dynamic performance, and robust integration - including instrumentation, medical imaging, and closed-loop control.
FAQ
What is the operating temperature range for the LTC2385IUH-16#TRPBF?
The LTC2385IUH-16#TRPBF is rated for operation from –40°C to +85°C (Industrial grade), as confirmed by its "I" temperature suffix and Absolute Maximum Ratings table. This range is validated across all specified electrical characteristics including INL, SNR, and reference drift.
Does the LTC2385IUH-16#TRPBF require an external reference?
No - the LTC2385IUH-16#TRPBF includes an internal 2.048 V reference with ±20 ppm/°C max drift and a 2× gain buffer outputting 4.096 V. An external reference may be applied to REFIN only if higher initial accuracy or lower drift is required; otherwise, the internal reference is fully functional.
How does the LVDS interface of the LTC2385IUH-16#TRPBF operate in one-lane versus two-lane mode?
In one-lane mode (TWOLANES = low), the LTC2385IUH-16#TRPBF outputs all 16 bits sequentially on DA+/DA– over 16 LVDS clock cycles. In two-lane mode (TWOLANES = high), it outputs two bits per cycle - MSBs on DA+/DA– and LSBs on DB+/DB– - completing transmission in 8 cycles, halving interface timing constraints.
What is the power consumption of the LTC2385IUH-16#TRPBF during active and power-down operation?
The LTC2385IUH-16#TRPBF draws 78 mW at 5 Msps (3 mA @ 5 V, 17.1 mA @ 2.5 V, 8.1 mA @ 2.5 V). In power-down mode (PD = low), total current drops to 10 μW - achieved by disabling all analog circuitry, reference buffer, and LVDS drivers while retaining register state.
Can the LTC2385IUH-16#TRPBF accept single-ended analog inputs?
No - the LTC2385IUH-16#TRPBF is strictly a fully differential input ADC. IN+ and IN– must be driven 180° out-of-phase with common-mode voltage centered at VCM = 2.048 V. Single-ended sources require external differential driver amplifiers to meet input range (±4.096 V) and CMRR requirements.
LTC2385IUH-16#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 5M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- 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:
- 2.375V ~ 2.625V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2385IUH-16#TRPBF FAQ
1.How can I place an order for LTC2385IUH-16#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2385IUH-16#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 LTC2385IUH-16#TRPBF reliable?
The price and inventory of LTC2385IUH-16#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2385IUH-16#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2385IUH-16#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2385IUH-16#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2385IUH-16#TRPBF?
LTC2385IUH-16#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2385IUH-16#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 LTC2385IUH-16#TRPBF?
For technical support, including LTC2385IUH-16#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2385IUH-16#TRPBF requirements.
6.How does Aetrix verify that LTC2385IUH-16#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2385IUH-16#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 LTC2385IUH-16#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2385IUH-16#TRPBF?
All LTC2385IUH-16#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2385IUH-16#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 LTC2385IUH-16#TRPBF part is unused and in its original packaging.
Return procedure for LTC2385IUH-16#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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