Overview
The AD7685ACPZRL7 is a 16-bit, successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the PulSAR® series and is known for its high precision, low power consumption, and versatile serial interface. It operates from a single power supply between 2.3 V and 5.5 V, making it suitable for a wide range of applications. The AD7685 features an internal conversion clock, a track-and-hold circuit, and no pipeline delay, which makes it ideal for multiple multiplexed channel applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Input Type | ADC, Successive Approximation |
| Supply Voltage (Analog) | 2.3 V to 5.5 V |
| Supply Voltage (Digital) | 1.8 V to 5 V |
| Number of Analog In Channels | 1 |
| Sampling Rate | Up to 250 kSPS |
| Power Dissipation | 1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS |
| Standby Current | 1 nA |
| Package | 10-Lead LFCSP (3mm x 3mm), 10-Lead MSOP |
| Operating Temperature | -40°C to +85°C |
Key Features
- 16-bit resolution with no missing codes
- 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
- Pseudo differential analog input range: 0 V to VREF with VREF up to VDD
- No pipeline delay
- Single-supply operation
- Proprietary serial interface: SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
- Daisy-chain multiple ADCs, BUSY indicator
Applications
The AD7685 is suitable for various applications requiring high precision and low power consumption. Some key applications include:
- Multiple multiplexed channel systems
- Industrial control and automation
- Medical devices and diagnostic equipment
- Aerospace and defense systems
- High-speed data acquisition systems
Q & A
- What is the resolution of the AD7685ADC?
The AD7685 has a 16-bit resolution. - What is the sampling rate of the AD7685?
The AD7685 can sample up to 250 kSPS. - What is the supply voltage range for the AD7685?
The AD7685 operates from a single power supply between 2.3 V and 5.5 V. - What types of packages are available for the AD7685?
The AD7685 is available in 10-Lead LFCSP (3mm x 3mm) and 10-Lead MSOP packages. - Does the AD7685 have any pipeline delay?
No, the AD7685 does not exhibit any pipeline delay or latency. - What is the operating temperature range of the AD7685?
The AD7685 operates from -40°C to +85°C. - Can the AD7685 be daisy-chained with other ADCs?
Yes, the AD7685 can be daisy-chained using its SPI-compatible serial interface. - What is the power dissipation of the AD7685 at different sampling rates?
The power dissipation is 1.35 mW at 2.5 V/100 kSPS and 4 mW at 5 V/100 kSPS. - Is the AD7685 compatible with different logic families?
Yes, it is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO. - What is the standby current of the AD7685?
The standby current is 1 nA.
