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Analog Devices Inc. LTC2321HUFD-16#TRPBF
- Part No.:
- LTC2321HUFD-16#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC2321HUFD-16#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,209
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Product details
Overview
LTC2321HUFD-16#TRPBF from Analog Devices is a dual-channel, 16-bit, 2 Msps successive approximation register (SAR) analog-to-digital converter with differential inputs, ±4 LSB typical INL, 81 dB SNR at 500 kHz, and guaranteed no missing codes. It operates from a single 3.3 V or 5 V supply, features an integrated 4.096 V temperature-compensated reference (20 ppm/°C max drift), and supports CMOS or LVDS serial interfaces - ideal for high-speed data acquisition in automotive and industrial systems operating up to 125°C.
For engineers reviewing the LTC2321HUFD-16#TRPBF datasheet, LTC2321HUFD-16#TRPBF pinout, LTC2321HUFD-16#TRPBF application, or LTC2321HUFD-16#TRPBF equivalent, key selection considerations include its dual-channel 2 Msps throughput with zero cycle latency, wide 8 VP-P differential input range, internal reference flexibility (2.048 V / 4.096 V), 1.8 V–2.5 V I/O compatibility, and operation across –40°C to +125°C.
Technical Context
The LTC2321HUFD-16#TRPBF implements two independent SAR ADC cores sharing a common reference architecture and digital interface. Each channel achieves 16-bit resolution with no missing codes over temperature, supported by a low-drift internal reference buffer and precision sampling switches with 10 pF input capacitance and 15 Ω on-resistance.
Its timing architecture uses a falling-edge-triggered CNV signal to initiate conversion with 220 ns conversion time and no pipeline latency; serial output is synchronized via either CMOS-level SCK/CLKOUT or LVDS differential pairs (SCK±, CLKOUT±, SDO1±, SDO2±), enabling deterministic readout in FPGA- or DSP-based systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output levels for high-fidelity signal digitization. |
| Sampling Rate | 2 Msps per channel - enables real-time capture of signals up to 10 MHz bandwidth (–3 dB). |
| INL (Typ) | ±4 LSB - ensures monotonicity and accurate representation of linear transducers or sensor outputs. |
| SNR (Typ) | 81 dB at fIN = 500 kHz - supports >13 ENOB for demanding dynamic signal analysis. |
| Reference Voltage | 4.096 V (internal, temp-compensated) - provides stable full-scale scaling without external components. |
| Supply Range | VDD = 4.75 V to 5.25 V or 3.13 V to 3.47 V - compatible with standard 5 V and 3.3 V system rails. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, motor control, and harsh industrial environments. |
| Power (Typ) | 31 mW per channel at 2 Msps (5 V, CMOS mode) - balances speed and efficiency in thermally constrained designs. |
Pinout & Package
Package: 28-lead (4 mm × 5 mm) plastic QFN (UFD) with exposed thermal pad (Pin 29 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 8) | Analog power supply | Single 3.3 V or 5 V rail powering ADC core and reference; bypass with 10 µF + 0.1 µF ceramics. |
| AIN1+, AIN1– (Pins 7, 6) | Channel 1 differential analog input | Accepts ±4.096 V differential swing with 0 V to VDD common-mode range; no configuration required. |
| AIN2+, AIN2– (Pins 2, 3) | Channel 2 differential analog input | Independent second channel with identical specs and interface; enables simultaneous dual-sampling. |
| CNV (Pin 9) | Conversion start trigger | Falling edge initiates sample-and-hold and conversion; requires low-jitter digital source (e.g., FPGA clock). |
| SCK+, SCK– (Pins 21, 22) | Serial clock input | Differential LVDS or single-ended CMOS clock (up to 64 MHz); determines data shift rate and timing alignment. |
| SDO1+, SDO1– (Pins 15, 16) | Channel 1 serial data output | MSB-first 16-bit result; LVDS mode requires 100 Ω differential termination at receiver (e.g., FPGA input). |
| CLKOUT+, CLKOUT– (Pins 17, 18) | Skew-matched output clock | Provides phase-aligned clock to latch SDO data at receiver; eliminates setup/hold timing uncertainty. |
| REFOUT1, REFOUT2 (Pins 12, 26) | Internal reference outputs | Nominally 4.096 V buffered references; decoupled locally with 0.1 µF + 10 µF ceramics; disable via REFINT. |
| REFINT (Pin 28) | Reference enable/disable | Tie to VDD for internal reference; ground to disable buffers and use external 1.25 V–5 V reference. |
| CMOS/LVDS (Pin 25) | I/O interface mode select | GND = CMOS; OVDD = LVDS; floating = low-power LVDS - configures driver strength and logic thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 16-bit SAR channels | Enables synchronous sampling of two sensors or phases without interleaving artifacts or timing skew. |
| No cycle latency | Each CNV edge triggers immediate conversion and readout - critical for closed-loop control with deterministic timing. |
| Onboard 4.096 V reference (20 ppm/°C max) | Eliminates external reference IC and trimming; maintains accuracy across –40°C to +125°C operating range. |
| LVDS or CMOS serial interface | Reduces EMI and supports long trace routing in noisy environments; configurable per system I/O voltage (1.8 V/2.5 V). |
| Nap and sleep modes | Reduces current to 5 µW in sleep mode - extends battery life in intermittent-sampling applications like condition monitoring. |
| 8 VP-P differential input range | Supports high dynamic range signals (e.g., motor phase currents, vibration sensors) while rejecting common-mode noise. |
Applications
| Motor Phase Current Sensing | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: Real-time measurement of three-phase motor winding currents in inverter-driven EV traction systems. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling captures instantaneous current vectors for field-oriented control (FOC) at 2 Msps. Use Value: 81 dB SNR and ±4 LSB INL ensure precise torque estimation; 125°C rating supports placement near power modules. |
Use Scenario: High-accuracy cell voltage and pack current monitoring in 48 V mild-hybrid vehicle battery management systems. IC Role / Device Role / Timing Role: Digitizes isolated voltage sense signals and shunt-based current measurements with synchronized dual acquisition. Use Value: Internal 4.096 V reference eliminates calibration drift; LVDS interface rejects noise in high-EMI under-hood environments. |
| Industrial PLC Analog Input Module | Optical Network Signal Analysis |
|
Use Scenario: 16-bit analog input channel in modular programmable logic controllers requiring 0–10 V, ±10 V, or 4–20 mA support. IC Role / Device Role / Timing Role: Front-end ADC for isolated signal conditioning stages; handles bipolar/unipolar/pseudo-differential inputs without reconfiguration. Use Value: Wide common-mode range (0 V to VDD) relaxes op-amp supply requirements; no missing codes guarantees data integrity over full scale. |
Use Scenario: Digitizing RF-modulated optical detector outputs in coherent transceivers for error vector magnitude (EVM) analysis. IC Role / Device Role / Timing Role: High-SNR acquisition of baseband I/Q signals at multi-MHz rates for real-time DSP-based demodulation. Use Value: 81 dB SNR and –90 dB THD preserve modulation fidelity; zero-latency readout enables tight feedback loops in adaptive equalization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-16 | 8-channel, 16-bit, 1 Msps, parallel/serial interface; ±10 V input range; external reference required. | Higher channel count but lower speed; suited for multi-sensor data loggers rather than real-time control loops. | Select when system requires ≥8 simultaneous channels and can accept 1 Msps max per channel. |
| ADS8924B | Single-channel, 16-bit, 2 Msps, SPI-only CMOS interface; no internal reference; 1.8 V I/O only. | Lacks dual-channel capability and LVDS option; requires external reference and level-shifting for mixed-voltage systems. | Select for space-constrained single-signal applications where LVDS noise immunity is unnecessary. |
Compared with AD7606C-16 and ADS8924B, the LTC2321HUFD-16#TRPBF uniquely combines dual-channel 2 Msps sampling, integrated 4.096 V reference, LVDS/CMOS flexibility, and –40°C to +125°C operation - making it optimal for automotive motor control and industrial real-time acquisition where synchronization, accuracy, and ruggedness are co-critical.
Availability
LTC2321HUFD-16#TRPBF is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial PLC analog input modules, and optical network signal analysis requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2321HUFD-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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2321HUFD-16#TRPBF belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous dual-channel acquisition, low-latency determinism, and operation in extreme ambient temperatures.
FAQ
What is the maximum operating temperature for the LTC2321HUFD-16#TRPBF?
The LTC2321HUFD-16#TRPBF is rated for continuous operation from –40°C to +125°C, meeting the H-grade specification. This makes it suitable for under-hood automotive applications, high-temperature industrial motor drives, and aerospace subsystems where thermal robustness is essential. The device's internal reference drift remains within 20 ppm/°C across this full range.
Does the LTC2321HUFD-16#TRPBF require an external reference?
No - the LTC2321HUFD-16#TRPBF integrates a low-drift, temperature-compensated 4.096 V reference buffer (also configurable for 2.048 V). REFOUT1 and REFOUT2 pins provide buffered outputs; grounding REFINT disables the buffers if an external reference (1.25 V–5 V) is preferred. No external reference IC is needed for standard operation.
How does the CNV pin function in the LTC2321HUFD-16#TRPBF?
The CNV pin on the LTC2321HUFD-16#TRPBF is a falling-edge-triggered conversion start input. A clean, low-jitter CNV pulse initiates the sample-and-hold phase and begins conversion with 220 ns typical duration. There is no pipeline latency: the result of each CNV edge is available for readout immediately after conversion completes, supporting deterministic real-time control.
Can the LTC2321HUFD-16#TRPBF interface directly with a 1.8 V FPGA I/O bank?
Yes - the LTC2321HUFD-16#TRPBF supports 1.8 V to 2.5 V I/O voltages via the OVDD supply (Pin 14). When configured in CMOS mode (CMOS/LVDS pin grounded), SDO1+, SDO2+, CLKOUT+, and SCK+ operate at OVDD logic levels. This allows direct connection to 1.8 V FPGA I/O banks without level shifters, provided OVDD is set to 1.8 V and proper decoupling is applied.
What power-saving modes does the LTC2321HUFD-16#TRPBF support?
The LTC2321HUFD-16#TRPBF offers Nap Mode (2.55 mA typical) and Sleep Mode (5 µA typical), both entered via control of the CNV and interface signals. In Sleep Mode, total supply current drops to 5 µW (IVDD + IOVDD), enabling ultra-low-power operation during idle periods in battery-powered condition monitoring or wake-on-event systems.
LTC2321HUFD-16#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2M
- Number of Inputs:
- 2
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- LVDS - Serial, Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3.13V ~ 3.47V, 5V
- Voltage - Supply, Digital:
- 3.13V ~ 3.47V, 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 28-QFN (4x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2321HUFD-16#TRPBF FAQ
1.How can I place an order for LTC2321HUFD-16#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2321HUFD-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 LTC2321HUFD-16#TRPBF reliable?
The price and inventory of LTC2321HUFD-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 LTC2321HUFD-16#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2321HUFD-16#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2321HUFD-16#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2321HUFD-16#TRPBF?
LTC2321HUFD-16#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2321HUFD-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 LTC2321HUFD-16#TRPBF?
For technical support, including LTC2321HUFD-16#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2321HUFD-16#TRPBF requirements.
6.How does Aetrix verify that LTC2321HUFD-16#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2321HUFD-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 LTC2321HUFD-16#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2321HUFD-16#TRPBF?
All LTC2321HUFD-16#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2321HUFD-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 LTC2321HUFD-16#TRPBF part is unused and in its original packaging.
Return procedure for LTC2321HUFD-16#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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