LTC2320CUKG-16 - 16-Bit Octal 1.5Msps/Ch SAR ADC | Analog Devices
MPN: LTC2320CUKG-16 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $36.95 | $36.95 |
| 10 | $33.3 | $333.00 |
| 100 | $28.5 | $2,850.00 |
| 500 | $24.8 | $12,400.00 |
| 1,000 | $21.5 | $21,500.00 |
LTC2320CUKG-16 Overview
An ADC (analog-to-digital converter) is a semiconductor device that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the broader data-converter hierarchy, the LTC2320CUKG-16 belongs to the SAR ADC family, which excels at high-speed multi-channel acquisition with deterministic latency and low power consumption compared to delta-sigma or pipeline architectures. The octal simultaneous-sampling topology makes it especially well suited to multi-axis systems where phase alignment between channels is critical.
Key features include an on-board low-drift (20 ppm/°C max) 2.048V or 4.096V temperature-compensated internal reference, wide input common-mode range for high CMRR, an SPI-compatible serial interface for data readback and configuration, and single-supply operation that simplifies system power design. The combination of 1.5 Msps/ch throughput and 16-bit resolution enables high-fidelity digitization of fast transient signals while preserving DC accuracy.
Architecturally, each of the eight channels employs an independent capacitive SAR core with dedicated track-and-hold, sharing a common precision reference and clock distribution network. The internal reference eliminates the need for an external ADR4xx device, reducing BOM cost and PCB area. The simultaneous-sampling architecture preserves inter-channel phase relationships, which is essential for beamforming, power-converter phase control, and vibration analysis.
Typical applications include multichannel data acquisition systems, phased-array sonar and radar digitizers, three-phase power-line monitoring, medical imaging front ends, and industrial vibration analysis. The differential inputs and high CMRR also suit motor-control feedback loops where switching noise must be rejected.
When designing with this part, ensure that the 52-pin QFN exposed pad is soldered to a sufficient ground plane for thermal dissipation, and place the input RC networks close to each analog input pin to preserve AC performance. Decouple AVDD and DVDD separately with 10 µF and 0.1 µF ceramic capacitors placed as close as possible to the supply pins.
This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single concise reference for evaluation and procurement.
Drop-in alternatives for LTC2320CUKG-16 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2320IUKG-16
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2320CUKG-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2320CUKG-16#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2320IUKG-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2320IUKG-16#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2320CUKG-16 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 8 (octal, simultaneous sampling) |
| Sample Rate per Channel | 1.5 Msps/ch |
| Input Type | Differential |
| Differential Input Range | 8 V_P-P |
| Supply Voltage | 3.3 V or 5 V single supply |
| INL (Integral Non-Linearity) | ±2 LSB (typical) |
| Missing Codes | No missing codes at 16 bits |
| SNR (Signal-to-Noise Ratio) | 82 dB |
| Internal Reference | 2.048 V or 4.096 V, 20 ppm/°C max drift |
| Interface | SPI-compatible serial |
| Operating Temperature Range | 0 °C to +70 °C (C-grade commercial) |
| Package | 52-QFN (7x8 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
LTC2320CUKG-16 52-qfn (7x8 mm) Pin Configuration Guide
Pin configuration for LTC2320CUKG-16 (52-qfn (7x8 mm) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LTC2320CUKG-16.
Refer to the datasheet for full pin configuration.
Typical Applications
LTC2320CUKG-16 is suitable for 6 applications: Multichannel Data Acquisition Systems, Phased-Array Sonar and Radar Digitizers, Three-Phase Power-Line Monitoring, Medical Imaging Front Ends, Industrial Vibration Analysis, Motor Control and Encoder Feedback.
Multichannel Data Acquisition Systems
The LTC2320CUKG-16's 8 simultaneous-sampling channels at 1.5 Msps/ch with 16-bit resolution and 82 dB SNR make it a natural fit for high-channel-count data acquisition modules. Each channel's differential 8 V_P-P input range with wide common-mode tolerance allows direct connection to bridge sensors, thermocouples via front-end amplifiers, and 4-20 mA current loops with shunt resistors. The on-board 2.048V or 4.096V reference with 20 ppm/°C max drift eliminates external reference drift in industrial temperature environments, while the SPI-compatible serial interface enables daisy-chaining multiple devices for >8 channel systems without consuming parallel GPIO.
Recommended
Phased-Array Sonar and Radar Digitizers
Phased-array sonar and radar systems require precisely time-aligned digitizer channels to compute beamforming weights and direction-of-arrival estimates. The LTC2320CUKG-16's simultaneous sampling ensures all 8 channels capture their respective antenna or hydrophone signals on the same clock edge, eliminating inter-channel skew that would otherwise corrupt beam pattern calculations. With 1.5 Msps/ch throughput and 82 dB SNR, the device digitizes IF-stage signals from multiple receiver chains with sufficient dynamic range for detecting weak targets in the presence of strong clutter, while the 52-QFN package keeps board density manageable in array-element-dense layouts.
Recommended
Three-Phase Power-Line Monitoring
Three-phase power quality analyzers and protective relays must sample all three phase voltages and three phase currents simultaneously to compute true instantaneous power, harmonics, and sequence components. The LTC2320CUKG-16's 8 differential inputs naturally accommodate 6 measurement channels (3 voltages via resistor dividers, 3 currents via current transformers or Rogowski coil integrators) with 2 spare channels for neutral current or DC link monitoring. The 8 V_P_P differential input range allows direct connection to scaled-down 480 V AC mains signals, while 82 dB SNR supports accurate harmonic measurement up to the 50th harmonic for Class A power quality compliance.
Recommended
Medical Imaging Front Ends
Medical imaging modalities such as ultrasound, CT, and PET require multi-channel simultaneous-sampling ADCs with high dynamic range and low noise to capture diagnostic-quality signals. The LTC2320CUKG-16's 8 channels at 1.5 Msps/ch with 82 dB SNR provide the channel density and fidelity required for portable ultrasound beamformer front ends, while the differential inputs with high CMRR reject common-mode noise from piezoelectric transducer biasing networks. The internal 2.048 V or 4.096 V reference with 20 ppm/°C max drift maintains calibration stability across body-temperature operating ranges, simplifying regulatory submissions.
Recommended
Industrial Vibration Analysis
Multi-axis vibration monitoring of rotating machinery (turbines, motors, gearboxes) demands simultaneous-sampling ADCs to preserve phase relationships between accelerometer axes for accurate modal and orbit analysis. The LTC2320CUKG-16's 8 channels allow direct digitization of triaxial accelerometers (3 axes each on 2 sensors) plus tachometer and phase-reference channels at 1.5 Msps/ch, capturing vibration harmonics well above typical 10 kHz machine fundamental frequencies. The differential 8 V_P_P inputs accommodate IEPE-style accelerometer outputs directly, while the SPI interface simplifies connection to industrial controllers and condition-monitoring processors.
Recommended
Motor Control and Encoder Feedback
Multi-axis servo drives and CNC machines require precisely synchronized feedback from multiple encoders or resolvers to maintain coordinated motion. The LTC2320CUKG-16's 8 simultaneous-sampling channels at 1.5 Msps/ch digitize resolver-to-digital converter outputs, encoder quadrature signals, and current-sense amplifiers across multiple drive axes without inter-channel latency mismatch. The 16-bit resolution provides the angle measurement precision required for sub-arc-minute positioning accuracy, while the 8 V_P_P differential input range accepts standard industrial ±10 V signal levels directly with appropriate scaling.
Recommended
Recommended Products Summary
Engineering reference data for LTC2320CUKG-16 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2320IUKG-16 | LTC2320CUKG-16#PBF | LTC2320CUKG-16#TRPBF | LTC2320IUKG-16#PBF | LTC2320IUKG-16#TRPBF |
|---|---|---|---|---|---|---|
| Package | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same | 52-QFN (7x8 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Number of Channels | 8 (simultaneous) | 8 (simultaneous) | 8 (simultaneous) | 8 (simultaneous) | 8 (simultaneous) | 8 (simultaneous) |
| Sample Rate per Channel | 1.5 Msps/ch | 1.5 Msps/ch | 1.5 Msps/ch | 1.5 Msps/ch | 1.5 Msps/ch | 1.5 Msps/ch |
| Operating Temperature Range | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Internal Reference | 2.048 V or 4.096 V | 2.048 V or 4.096 V | 2.048 V or 4.096 V | 2.048 V or 4.096 V | 2.048 V or 4.096 V | 2.048 V or 4.096 V |
| SNR | 82 dB | 82 dB | 82 dB | 82 dB | 82 dB | 82 dB |
Key Differentiators
- Octal simultaneous sampling at 1.5 Msps/ch in compact 52-QFN (vs AD7606 family)
- Integrated precision reference eliminates external ADR4xx (vs Discrete-reference SAR ADC designs)
- Wide 8 V_P_P differential input with high CMRR (vs Single-ended input SAR ADCs)
Design Notes
The LTC2320CUKG-16 52-pin QFN package has an exposed thermal pad on the underside that MUST be soldered to a continuous ground plane for both thermal dissipation and electrical performance. Use an array of thermal vias (typically 9 to 25 vias on 1.0 mm to 1.2 mm pitch) directly under the EP to conduct heat into inner ground layers. Insufficient EP soldering can degrade SNR and increase channel-to-channel crosstalk.
Decouple AVDD and DVDD separately with both bulk (10 µF tantalum or ceramic) and high-frequency (0.1 µF X7R ceramic) capacitors placed as close as possible to the respective supply pins. Per the Analog Devices datasheet 232016fb, separate analog and digital ground returns should be joined at a single point near the ADC to prevent digital switching noise from corrupting the analog conversion. Estimated: typical 8-channel operation at 1.5 Msps/ch draws approximately 30-40 mA total from AVDD plus 5-10 mA from DVDD depending on SPI clock frequency.
Route each differential input pair symmetrically with matched trace lengths and 50 Ω characteristic impedance on outer PCB layers. Place input RC anti-alias filter networks within 5 mm of each analog input pin to preserve AC performance. Keep digital SPI traces (SDO, SCK, CNV) physically separated from analog input traces by at least 3x the trace-to-trace spacing to minimize digital coupling into the analog front end.
For multi-channel simultaneous-sampling applications, the CNV (convert) signal must be distributed to all eight channels with matched trace lengths (within 1-2 mm) to preserve inter-channel time alignment. Use a clock buffer such as the LTC6900 or a dedicated fanout IC if driving multiple LTC2320CUKG-16 devices, rather than daisy-chaining CNV signals which introduces sample-to-sample skew.
Do not leave the REF pin floating if the internal reference is used - the datasheet requires a 10 µF decoupling capacitor on REFIN/REFOUT for stable operation. Avoid routing high-current switching signals or DC-DC converter inductors near the analog input traces, as the LTC2320CUKG-16's wide common-mode range does not protect against magnetic-field-induced crosstalk. When daisy-chaining multiple devices via SPI, ensure SDO load capacitance does not exceed the datasheet's 20 pF limit to avoid timing violations at high clock rates.
Compliance Information
RoHS compliant per the #PBF suffix designation on Analog Devices part numbers. Not AEC-Q100 qualified (no automotive-grade variant available in this family). Lead-free reflow-compatible per JEDEC J-STD-020.
