Overview
The AD7685CCPZRL7 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 precision, 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 from 1.8 V to 5 V. The AD7685 is housed in a compact 10-lead LFCSP (3mm x 3mm) 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 | 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 | −40°C to +85°C |
| Package | 10-lead LFCSP (3mm x 3mm) |
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 with short aperture delay.
- Versatile SPI-compatible serial interface supporting daisy-chaining and BUSY indicator.
- Pin-for-pin compatibility with other PulSAR® ADCs like AD7686, AD7687, and AD7688.
- Compact 10-lead LFCSP package for space-saving designs.
Applications
The AD7685 is ideal for multiple multiplexed channel applications due to its on-chip track-and-hold circuit and lack of pipeline delay. It is suitable for a variety of applications including industrial process control, medical devices, and data acquisition systems where high precision and low power consumption are critical.
Q & A
- What is the resolution of the AD7685?
The AD7685 has a 16-bit resolution. - What is the maximum throughput of the AD7685?
The maximum throughput is up to 250 kSPS. - What is the typical Integral Nonlinearity (INL) of the AD7685?
The typical INL is ±0.6 LSB. - What is the power supply range for the AD7685?
The power supply range is from 2.3 V to 5.5 V. - Is the AD7685 compatible with different logic families?
Yes, it is compatible with 1.8 V to 5 V digital logic families. - What is the operating temperature range of the AD7685?
The operating temperature range is from −40°C to +85°C. - What type of package does the AD7685 come in?
The AD7685 comes in a 10-lead LFCSP (3mm x 3mm) package. - Can multiple AD7685 ADCs be daisy-chained?
Yes, multiple AD7685 ADCs can be daisy-chained using the SPI-compatible serial interface. - What is the standby current of the AD7685?
The standby current is 1 nA. - Is the AD7685 pin-for-pin compatible with other ADCs?
Yes, it is pin-for-pin compatible with other PulSAR® ADCs like AD7686, AD7687, and AD7688.
