Overview
The AD7124-4BBCPZ-RL is a 4-channel, low noise, low power, 24-bit Sigma-Delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for high precision measurement applications and offers a high degree of signal chain integration. It features a low noise, low drift internal band gap reference and can be configured to have four differential inputs or seven single-ended or pseudo differential inputs. The AD7124-4 provides flexibility through three integrated power modes, allowing users to tailor current consumption, output data rates, and rms noise according to their needs.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Number of Bits | 24 |
| Converter Type | Sigma-Delta ADC |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 0.95mm) |
| Operating Temperature Range | -40°C to +125°C |
| Supply Voltage | 2.7 V to 3.6 V (analog), 1.65 V to 3.6 V (digital) |
| Output Format | Serial |
| Output Bit Code | Offset Binary |
| Linearity Error-Max (EL) | 0.0015% |
| Power Modes | Low Power, Mid Power, Full Power |
| RMS Noise (Low Power, Gain = 128) | 24 nV rms at 1.17 SPS |
| RMS Noise (Mid Power, Gain = 128) | 20 nV rms at 2.34 SPS |
| RMS Noise (Full Power, Gain = 128) | 23 nV rms at 9.4 SPS |
Key Features
- Low noise and low power consumption with three power modes
- Programmable low drift excitation current sources and burnout currents
- Bias voltage generator setting common-mode voltage to AVDD/2
- Low-side power switch for minimal power consumption
- Integrated channel sequencer allowing up to 16 channels to be enabled simultaneously
- Per channel configuration with eight setups (gain, filter type, output data rate, buffering, and reference source)
- Simultaneous 50 Hz and 60 Hz rejection with rejection in excess of 80 dB at lower output data rates
- Extensive diagnostic functionality including cyclic redundancy check (CRC), signal chain checks, and serial interface checks
Applications
The AD7124-4 is suitable for various high precision measurement applications, including industrial automation, medical devices, and automotive systems. It is particularly useful in environments requiring low noise, low power consumption, and high signal integrity. The device also supports defense and aerospace applications with the AD7124-4-EP model, which meets AQEC standards.
Q & A
- What is the primary function of the AD7124-4? The AD7124-4 is a 4-channel, low noise, low power, 24-bit Sigma-Delta analog-to-digital converter (ADC) designed for high precision measurement applications.
- What are the power modes available on the AD7124-4? The device offers three integrated power modes: Low Power, Mid Power, and Full Power.
- What is the operating temperature range of the AD7124-4? The operating temperature range is -40°C to +125°C.
- What types of inputs can the AD7124-4 be configured for? The device can be configured to have four differential inputs or seven single-ended or pseudo differential inputs.
- Does the AD7124-4 support external clocking? Yes, the device allows the user to operate with either an internal clock or an external clock.
- What is the significance of the integrated channel sequencer? The integrated channel sequencer allows several channels to be enabled simultaneously, and the AD7124-4 sequentially converts on each enabled channel, simplifying communication with the device.
- What diagnostic functionalities are integrated into the AD7124-4? The device includes cyclic redundancy check (CRC), signal chain checks, and serial interface checks.
- What are the supply voltage ranges for the AD7124-4? The analog supply voltage range is 2.7 V to 3.6 V, and the digital supply voltage range is 1.65 V to 3.6 V.
- Is the AD7124-4 suitable for automotive applications? Yes, the device is specified for a temperature range and other parameters that make it suitable for automotive applications.
- Does the AD7124-4 support simultaneous 50 Hz and 60 Hz rejection? Yes, the device can achieve simultaneous 50 Hz and 60 Hz rejection with rejection in excess of 80 dB at lower output data rates.
