Overview
The ADUM7702-8BRIZ-RL7, produced by Analog Devices Inc., is a high-performance, second-order, Σ-Δ (Sigma-Delta) modulator. This device is designed to convert an analog input signal into a high-speed, single-bit data stream. It features on-chip digital isolation based on Analog Devices' iCoupler® technology, making it ideal for applications requiring galvanic isolation.
The ADUM7702 operates from a 4.5 V to 5.5 V power supply range and accepts a pseudo-differential input signal of ±50 mV (±64 mV full-scale). This makes it particularly suited for shunt voltage monitoring in high-voltage applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Master Clock Input Frequency | 5 MHz | - | 21 MHz | - | - |
| Offset Drift vs. Temperature | - | ±0.25 µV/°C | - | - | - |
| Signal-to-Noise Ratio (SNR) | - | 82 dB | - | - | At 78.1 kSPS with 256 decimation rate and 20 MHz master clock |
| Effective Number of Bits (ENOB) | - | 13 bits | - | - | - |
| Full-Scale Analog Input Voltage Range | - | ±64 mV | - | - | - |
| Power Supply Range (VDD1) | 4.5 V | - | 5.5 V | - | - |
| Supply Current (IDD1) | - | - | 10 mA | - | - |
| Common-Mode Transient Immunity (CMTI) | - | - | 150 kV/μs | - | VDD2 = 5.5 V or 3.3 V |
Key Features
- High-performance, second-order, Σ-Δ modulator converting analog input to a high-speed, single-bit data stream.
- On-chip digital isolation using iCoupler® technology.
- Pseudo-differential input signal of ±50 mV (±64 mV full-scale), ideal for shunt voltage monitoring in high-voltage applications.
- Operates from a 4.5 V to 5.5 V power supply range (VDD1) and accepts a 5 V or 3 V supply (VDD2) for serial interface.
- High speed complementary serial interface.
- CMOS logic inputs with Schmitt trigger and high output current capability.
- High common-mode transient immunity (CMTI) of up to 150 kV/μs.
Applications
- Shunt voltage monitoring in high-voltage applications where galvanic isolation is required.
- Industrial control systems requiring isolated analog-to-digital conversion.
- Power monitoring and measurement systems.
- Medical devices needing isolated data acquisition.
- Automotive and aerospace systems requiring high reliability and isolation.
Q & A
- What is the primary function of the ADUM7702-8BRIZ-RL7?
The ADUM7702-8BRIZ-RL7 is a high-performance, second-order, Σ-Δ modulator that converts an analog input signal to a high-speed, single-bit data stream with on-chip digital isolation.
- What is the input voltage range of the ADUM7702?
The device accepts a pseudo-differential input signal of ±50 mV (±64 mV full-scale).
- What is the power supply range for the ADUM7702?
The device operates from a 4.5 V to 5.5 V power supply range (VDD1) and accepts a 5 V or 3 V supply (VDD2) for the serial interface.
- What is the typical signal-to-noise ratio (SNR) of the ADUM7702?
The typical SNR is 82 dB at 78.1 kSPS with a 256 decimation rate and a 20 MHz master clock.
- What is the common-mode transient immunity (CMTI) of the ADUM7702?
The CMTI is up to 150 kV/μs for both VDD2 = 5.5 V and VDD2 = 3.3 V.
- What are the typical applications of the ADUM7702?
It is used in shunt voltage monitoring in high-voltage applications, industrial control systems, power monitoring and measurement systems, medical devices, and automotive and aerospace systems.
- How does the ADUM7702 achieve digital isolation?
The device uses Analog Devices' iCoupler® technology for on-chip digital isolation.
- What is the maximum supply current (IDD1) of the ADUM7702?
The maximum supply current (IDD1) is 10 mA.
- What is the effective number of bits (ENOB) of the ADUM7702?
The typical ENOB is 13 bits.
- How does the ADUM7702 handle logic inputs and outputs?
The device features CMOS logic inputs with Schmitt trigger and high output current capability.
