Overview
The ADuM7703-8BRIZ-RL7, produced by Analog Devices Inc., is a high-performance, second-order, Σ-Δ (Sigma-Delta) analog-to-digital converter (ADC) with an integrated low dropout (LDO) regulator. This device converts an analog input signal into a high-speed, single-bit data stream and features on-chip digital isolation based on Analog Devices' iCoupler® technology. It is designed for applications requiring galvanic isolation, particularly in high-voltage environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VDD1 (Power Supply) | 4.5 | 15 | 20 | V | |
| VDD2 (Power Supply) | 3 | 5.5 | V | ||
| IDD1 (Current) | 8.2 | 10 | mA | ||
| IDD2 (Current) | 2 | 3 | mA | ||
| Analog Input Range | ±250 mV | ±320 mV | Full-scale | ||
| Master Clock Input Frequency | 5 MHz | 21 MHz | |||
| Signal-to-Noise Ratio (SNR) | 86 dB | Typical at 78.1 kSPS with 20 MHz master clock | |||
| Effective Number of Bits (ENOB) | 14 bits | Typical | |||
| Operating Temperature Range | −40°C | +125°C (16-lead SOIC), +105°C (8-lead SOIC) | |||
| Isolation Voltage | 780 V rms (1102 VPEAK) for 16-lead SOIC, 810 V rms (1145 VPEAK) for 8-lead SOIC | Reinforced insulation per CSA 60950-1-07 and IEC 60950-1 |
Key Features
- High-performance, second-order Σ-Δ ADC with integrated LDO regulator
- On-chip digital isolation using iCoupler® technology
- Pseudo differential analog input suitable for shunt voltage monitoring in high-voltage applications
- Master clock input frequency range of 5 MHz to 21 MHz
- High SNR of 86 dB typical at 78.1 kSPS with a 20 MHz master clock
- ENOB of 14 bits typical
- Operating temperature range of −40°C to +125°C (16-lead SOIC) and −40°C to +105°C (8-lead SOIC)
- High-speed CMOS technology combined with monolithic transformer technology for superior isolation performance
Applications
- High-voltage applications requiring galvanic isolation, such as power supplies, motor control systems, and industrial automation.
- Shunt voltage monitoring in high-voltage environments.
- Medical devices where isolation is critical for patient safety.
- Industrial control systems that require precise and isolated analog-to-digital conversion.
Q & A
- What is the ADuM7703-8BRIZ-RL7?
The ADuM7703-8BRIZ-RL7 is a high-performance, second-order Σ-Δ analog-to-digital converter (ADC) with an integrated low dropout (LDO) regulator and on-chip digital isolation.
- What is the power supply range for the ADuM7703?
The device operates from a 4.5 V to 20 V power supply range (VDD1) and accepts a 3 V to 5.5 V supply (VDD2) for the serial interface.
- What is the analog input range of the ADuM7703?
The analog input range is ±250 mV (±320 mV full-scale) pseudo differential.
- What is the signal-to-noise ratio (SNR) of the ADuM7703?
The SNR is 86 dB typical at 78.1 kSPS with a 20 MHz master clock.
- What is the effective number of bits (ENOB) of the ADuM7703?
The ENOB is 14 bits typical.
- What are the operating temperature ranges for the ADuM7703?
The operating temperature range is −40°C to +125°C for the 16-lead SOIC and −40°C to +105°C for the 8-lead SOIC.
- What is the isolation voltage rating of the ADuM7703?
The isolation voltage rating is up to 780 V rms (1102 VPEAK) for the 16-lead SOIC and up to 810 V rms (1145 VPEAK) for the 8-lead SOIC.
- In what applications is the ADuM7703 typically used?
The ADuM7703 is typically used in high-voltage applications requiring galvanic isolation, such as power supplies, motor control systems, industrial automation, and medical devices.
- What technology is used for digital isolation in the ADuM7703?
The ADuM7703 uses Analog Devices' iCoupler® technology for on-chip digital isolation.
- What is the master clock input frequency range of the ADuM7703?
The master clock input frequency range is from 5 MHz to 21 MHz.
