Overview
The AD7685ARMZ is a 16-bit, high-speed, low-power analog-to-digital converter (ADC) produced by Analog Devices Inc. This successive approximation ADC operates from a single power supply, ranging from 2.3 V to 5.5 V, and is designed for high precision and low power consumption. It features a built-in track-and-hold circuit, an internal conversion clock, and a versatile SPI-compatible serial interface. The AD7685ARMZ is housed in a compact 10-lead MSOP package, making it suitable for space-constrained applications.
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 Range | 2.3 V to 5.5 V |
| Logic Interface Voltage | 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 |
| Operating Temperature Range | −40°C to +85°C |
| Package Type | 10-lead MSOP |
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 SPI-compatible serial interface with daisy-chain capability and BUSY indicator.
- Single-supply operation with a wide range of logic interface voltages (1.8 V to 5 V).
- Compact 10-lead MSOP package for space-saving designs.
- Pin-for-pin compatibility with other PulSAR ADCs like AD7686, AD7687, and AD7688.
Applications
The AD7685ARMZ is ideal for multiple multiplexed channel applications due to its on-chip track-and-hold and lack of pipeline delay. It is suitable for various high-precision data acquisition systems, including medical devices, industrial control systems, and automotive applications. The compact package and low power consumption make it particularly useful in space-constrained and battery-powered devices.
Q & A
- What is the resolution of the AD7685ARMZ?
The AD7685ARMZ has a 16-bit resolution.
- What is the maximum throughput of the AD7685ARMZ?
The maximum throughput is up to 250 kSPS.
- What is the typical Integral Nonlinearity (INL) of the AD7685ARMZ?
The typical INL is ±0.6 LSB.
- What is the Signal-to-Noise and Distortion Ratio (SINAD) at 20 kHz?
The SINAD at 20 kHz is 93.5 dB.
- What is the Total Harmonic Distortion (THD) at 20 kHz?
The THD at 20 kHz is −110 dB.
- What is the power supply range for the AD7685ARMZ?
The power supply range is from 2.3 V to 5.5 V.
- What is the logic interface voltage range for the AD7685ARMZ?
The logic interface voltage range is from 1.8 V to 5 V.
- What is the standby current of the AD7685ARMZ?
The standby current is 1 nA.
- In what package is the AD7685ARMZ available?
The AD7685ARMZ is available in a 10-lead MSOP package.
- Is the AD7685ARMZ pin-for-pin compatible with other ADCs?
Yes, it is pin-for-pin compatible with the AD7686, AD7687, and AD7688.
