Data Acquisition - ADCs/DACs

Data Acquisition - ADCs/DACs - Special Purpose

Part Number	Description / PDF	Quantity
WM8782SEDS/RV Cirrus Logic	IC ADC/AUDIO 24BIT 192K 20SSOP	754
MAX1272CPA+ Analog Devices, Inc.	12-BIT ADC SELECTABLE INPUT	2980
LDC2112PWT Texas Instruments	IC CAP TO DGT CONV 12BIT 16TSSOP	1052
AD7890BR-2 Analog Devices, Inc.	12-BIT, 8 CHANNEL, SERIAL ADC	167
AMC1035DR Texas Instruments	IC MODULATOR 16BIT 8SOIC	1365
PCM1771PWR Texas Instruments	IC DAC/AUDIO 24BIT 50K 16TSSOP	1870
CS53L30-CNZR Cirrus Logic	IC ADC/AUDIO 24BIT 16K 32QFN	0
PCM1803ADBG4 Texas Instruments	IC ADC/AUDIO 24BIT 96K 20SSOP	0
CS4382A-CQZR Cirrus Logic	CS4382 - 114 DB, 192 KHZ 8-CHANN	9940
ADE7912ARIZ-RL Analog Devices, Inc.	IC ADC/ENERGY MEAS 24BIT 20SOIC	807
AD7147WPACPZ-1500R Analog Devices, Inc.	CAPTOUCH PROGRAMMABLE CONTROLLER	7675
BU7858KN-E2 ROHM Semiconductor	IC DAC/AUDIO 16BIT 28VQFN	0
AMC1035QDRQ1 Texas Instruments	IC SIGMA-DELT MOD 16BT 82K 8SOIC	2895
CS4349-DZZR Cirrus Logic	IC DAC/AUDIO 24BIT 192K 24TSSOP	0
PCM1860DBTR Texas Instruments	IC ADC/AUDIO 24BIT 192K 30TSSOP	0
AD2S1210ASTZ-RL7 Analog Devices, Inc.	IC R/D CONV 10/12/14/16B 48LQFP	334
PCM1725U/2KG4 Texas Instruments	IC DAC/AUDIO 16BIT 96K 14SOIC	0
PCM1739E Burr-Brown (Texas Instruments)	PCM1739 105DB SNR STEREO DAC	7903
MAX161ACWI+T Maxim Integrated	IC DAS 8BIT 50K 28SOIC	2000
TLV320DAC3100IRHBR Texas Instruments	IC DAC 24BIT 192K 32VQFN	0

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