Data Acquisition - ADCs/DACs

Data Acquisition - ADCs/DACs - Special Purpose

Part Number	Description / PDF	Quantity
DSD1608PAHR Texas Instruments	DAC, SERIAL INPUT	55450
RDC1740-418B Analog Devices, Inc.	IC R/D CONVERTER 14BIT 32DIP	0
ADV7128KR50-REEL Analog Devices, Inc.	10-BIT VIDEO DAC	2000
MAX1496EPI+ Maxim Integrated	IC ADC 3.5DIGIT 50 28DIP	168
MAX188CEPP+ Maxim Integrated	IC DAS/ADC 12BIT 133K 20DIP	0
CS53L21-CNZ Cirrus Logic	IC ADC/AUDIO 24BIT 96K 32QFN	1130
MSC1213Y4PAGT Texas Instruments	MSC1213Y4 MIXED SIGNAL MICROCONT	2182
AD7745ARUZ-REEL Analog Devices, Inc.	IC CAP TO DGT CONV 24BIT 16TSSOP	0
AD7401YRWZ-REEL7 Analog Devices, Inc.	IC ISOLATED MODULE 16BIT 16SOIC	0
AD369AM Analog Devices, Inc.	12-BIT DATA ACQUISITION SYSTEM	2
ADE1201ACCZ Analog Devices, Inc.	IC ISOL MOD 8BIT 100K 20LGA	423
AD1865RZ-J Analog Devices, Inc.	DUAL 18-BIT 16 X FS AUDIO DAC	16
CS43L21-CNZ Cirrus Logic	IC DAC/AUDIO 24BIT 96K 32QFN	0
RDC1742414 Analog Devices, Inc.	RESOLVER-TO-DIGITAL CONVERTERS	13
MAX196BCAI+ Maxim Integrated	IC DAS 12BIT 100K 28SSOP	128506
MAX186CEAP+ Maxim Integrated	IC DAS/ADC 12BIT 133K 20SSOP	71924
PCM1808PWRG4 Texas Instruments	IC ADC/AUDIO 24BIT 96K 14TSSOP	0
MAX192AEWP+ Maxim Integrated	IC DAS/ADC 10BIT 133K 20SOIC	1116
ADE1202ACCZ Analog Devices, Inc.	IC ISOL MOD 8BIT 100K 20LGA	169
ADS1201U Texas Instruments	ADS1201 HIGH DYNAMIC RANGE DELTA	4955

Data Acquisition - ADCs/DACs - Special Purpose

1. Overview

Special Purpose Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs) are integrated circuits designed for specific data acquisition tasks requiring tailored performance characteristics. These ICs enable precise signal conversion in specialized applications where standard converters cannot meet unique requirements such as ultra-high speed, extreme accuracy, isolation, or environmental robustness. They are critical in advanced industrial control systems, medical instrumentation, aerospace electronics, and high-frequency communication systems.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
High-Speed ADCs	Sampling rates >1 GSPS, low latency, wide bandwidth	Radar systems, 5G transceivers
High-Precision ADCs	24-bit resolution, 2ppm linearity, low noise	Medical imaging, precision test equipment
Isolated ADCs	Galvanic isolation up to 5kVRMS, CMTI >100kV/ s	Industrial motor drives, grid-tied inverters
Multi-Channel DACs	Synchronized channels, crosstalk < -100dB	Automotive LiDAR beam steering
Radiation-Hardened ADCs	Latch-up immunity, TID tolerance >100krad	Satellite payloads, nuclear instrumentation

3. Structure and Components

Typical architecture includes:

Input conditioning stage (PGA, anti-aliasing filter)
Sampling-and-Hold circuit with <10ps jitter
Conversion core (SAR, Delta-Sigma, Pipeline architecture)
Digital interface (SPI, JESD204B, LVDS)
Calibration engine for offset/linearity correction
Thermal management structures (exposed pads, thermal vias)

4. Key Technical Specifications

Parameter	Description	Importance
Effective Number of Bits (ENOB)	Actual resolution considering noise/distortion	System accuracy benchmark
Signal-to-Noise and Distortion (SINAD)	Dynamic range measurement	Determines minimum detectable signal
Integral Nonlinearity (INL)	Deviation from ideal transfer function	Essential for precision measurements
Power Supply Rejection Ratio (PSRR)	Noise immunity from power rails	System stability in varying conditions
Operating Temperature Range	-55 C to +150 C for automotive/military grades	Environmental reliability

5. Application Fields

Industrial Automation: Programmable Logic Controllers (PLCs) with 16-channel analog inputs
Medical Imaging: MRI scanners requiring 24-bit ADCs with 10nV/ Hz noise density
Aerospace: Avionics data acquisition with radiation-hardened DACs
Test & Measurement: Oscilloscopes using 8GS/s ADCs for 2GHz bandwidth
Energy Systems: Grid monitoring devices with 0.01% accurate voltage measurement

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Specifications
Analog Devices	AD7124-8	24-bit - ADC, 0.001% linearity, TUE <0.1%
TI Semiconductor	ADS54J60	16-bit, 1GSPS ADC with 74dB SNR
Maxim Integrated	MAX11156	16-channel, 18-bit SAR ADC, 0.1LSB INL
STMicroelectronics	LTC2380-24	24-bit, 2Msps ADC with 2ppm INL
NXP Semiconductors	MC12DX1080	8-channel DAC with 12.5ps jitter for LiDAR

7. Selection Guidelines

Key selection criteria:

Match sampling rate and bandwidth to signal requirements
Verify temperature stability and long-term drift specifications
Consider digital interface compatibility (e.g. JESD204C for high-speed links)
Evaluate power consumption vs. performance trade-offs
Example: For vibration analysis in jet engines, select ADC with 200dB dynamic range and -55 C to +125 C rating

Industry Trends

Emerging trends include:

3D-stacked ICs integrating ADCs with AI acceleration cores
Time-interleaved ADCs breaking 10 GSPS barriers
Self-calibrating DACs with embedded temperature sensors
Photonics-enabled converters for THz-range sampling
Energy-harvesting optimized ADCs with sub- W operation modes