Overview
The AD7946BRMZ is a 14-bit, successive approximation, analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 5 V power supply and is designed for high-speed, low-power applications. It features a charge redistribution DAC and an on-chip track-and-hold circuit, ensuring precise and efficient conversions. The AD7946BRMZ is available in 10-lead MSOP and 3 mm × 3 mm LFCSP packages, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Throughput | Up to 500 kSPS |
| Integral Nonlinearity (INL) | ±0.4 LSB typical, ±1 LSB maximum |
| Signal-to-Noise and Distortion Ratio (SINAD) | 85 dB at 20 kHz |
| Total Harmonic Distortion (THD) | −100 dB at 20 kHz |
| Analog Input Range | 0 V to REF (up to VDD) |
| Power Supply | Single 5 V supply |
| Logic Interface | 1.8 V/2.5 V/3 V/5 V compatible |
| Power Dissipation | 3.3 mW at 5 V/100 kSPS, 3.3 µW at 5 V/100 SPS |
| Standby Current | 1 nA |
| Package | 10-lead MSOP, 3 mm × 3 mm LFCSP |
Key Features
- No missing codes and low power consumption, making it ideal for battery-powered equipment.
- Pseudo differential analog input range from 0 V to REF with REF up to VDD.
- No pipeline delay and on-chip track-and-hold circuit.
- Proprietary serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Daisy-chain capability and BUSY indicator.
- Pin-for-pin compatible with the 16-bit AD7686.
Applications
- Battery-powered equipment.
- Data acquisition systems.
- Instrumentation.
- Medical instruments.
- Process control systems.
Q & A
- What is the resolution of the AD7946BRMZ?
The AD7946BRMZ has a resolution of 14 bits. - What is the maximum throughput of the AD7946BRMZ?
The maximum throughput is up to 500 kSPS. - What is the typical INL of the AD7946BRMZ?
The typical INL is ±0.4 LSB. - What is the SINAD of the AD7946BRMZ at 20 kHz?
The SINAD is 85 dB at 20 kHz. - What is the power supply requirement for the AD7946BRMZ?
The device operates from a single 5 V power supply. - What are the package options for the AD7946BRMZ?
The device is available in 10-lead MSOP and 3 mm × 3 mm LFCSP packages. - Is the AD7946BRMZ compatible with other ADC models?
Yes, it is pin-for-pin compatible with the 16-bit AD7686. - What is the standby current of the AD7946BRMZ?
The standby current is 1 nA. - Can the AD7946BRMZ be daisy-chained?
Yes, it supports daisy-chaining and has a BUSY indicator. - What are some typical applications of the AD7946BRMZ?
Typical applications include battery-powered equipment, data acquisition, instrumentation, medical instruments, and process control systems.
