Overview
The AD7685BRMZ is a 16-bit, successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the PulSAR® family and is known for its high resolution, low power consumption, and versatile interface. It operates from a single power supply ranging from 2.3 V to 5.5 V and is compatible with various digital logic families (1.8 V to 5 V). The AD7685BRMZ features an internal conversion clock and a track-and-hold circuit, making it suitable for applications requiring high accuracy and speed.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Throughput | Up to 250 kSPS |
| Integral Nonlinearity (INL) | ±0.6 LSB typical, ±2 LSB maximum |
| Signal-to-Noise and Distortion Ratio (SINAD) | 93.5 dB at 20 kHz |
| Total Harmonic Distortion (THD) | −110 dB at 20 kHz |
| Analog Input Range | 0 V to VREF (up to VDD) |
| Power Supply | 2.3 V to 5.5 V |
| Logic Interface | 1.8 V to 5 V |
| Power Dissipation | 1.4 µW at 2.5 V/100 SPS, 1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS |
| Standby Current | 1 nA |
| Package | 10-lead MSOP or 10-lead LFCSP (3 mm × 3 mm) |
| Operating Temperature | −40°C to +85°C |
Key Features
- No missing codes and high accuracy with ±0.6 LSB typical INL.
- High-speed operation with up to 250 kSPS throughput.
- Low power consumption with power dissipation scaling linearly with throughput.
- Internal conversion clock and track-and-hold circuit.
- Versatile serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Daisy-chain capability for multiple ADCs on a single 3-wire bus.
- Optional BUSY indicator.
- Pin-for-pin compatibility with other PulSAR® ADCs like AD7686, AD7687, and AD7688.
Applications
The AD7685BRMZ is ideal for multiple multiplexed channel applications due to its lack of pipeline delay and latency. It is suitable for use in various systems requiring high-speed, low-power analog-to-digital conversion, such as industrial control systems, medical devices, and data acquisition systems. The device's compact packaging (10-lead MSOP or LFCSP) makes it a good choice for space-constrained designs.
Q & A
- What is the resolution of the AD7685BRMZ?
The AD7685BRMZ has a resolution of 16 bits. - What is the maximum throughput of the AD7685BRMZ?
The maximum throughput is up to 250 kSPS. - What is the typical INL of the AD7685BRMZ?
The typical INL is ±0.6 LSB. - What is the power supply range for the AD7685BRMZ?
The power supply range is from 2.3 V to 5.5 V. - Is the AD7685BRMZ compatible with different logic families?
Yes, it is compatible with 1.8 V to 5 V digital logic families. - What types of packages are available for the AD7685BRMZ?
The device is available in 10-lead MSOP and 10-lead LFCSP (3 mm × 3 mm) packages. - Can multiple AD7685BRMZ ADCs be daisy-chained?
Yes, multiple ADCs can be daisy-chained on a single 3-wire bus. - What is the operating temperature range of the AD7685BRMZ?
The operating temperature range is from −40°C to +85°C. - Does the AD7685BRMZ have an internal conversion clock?
Yes, it has an internal conversion clock. - What is the standby current of the AD7685BRMZ?
The standby current is 1 nA.
