Overview
The AD7685CCPZRL is a 16-bit, successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is part of the PulSAR® series and is known for its high resolution and low power consumption. It is designed to operate in a single-supply mode with a voltage range of 2.3V to 5.5V and is compatible with various digital logic families from 1.8V to 5V. The AD7685 is housed in a compact 10-lead LFCSP (Lead Frame Chip Scale Package) or MSOP package, making it suitable for space-constrained applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Sampling Rate | 250 kSPS |
| Input Type | Pseudo-Differential |
| Supply Voltage (Analog) | 2.3V to 5.5V |
| Supply Voltage (Digital) | 2.3V to 5.5V |
| Power Dissipation | 1.35 mW at 2.5V/100 kSPS, 4 mW at 5V/100 kSPS |
| Standby Current | 1 nA |
| Package Type | 10-lead LFCSP or MSOP |
| Operating Temperature | -40°C to +85°C |
| 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 |
Key Features
- 16-bit resolution with no missing codes
- Successive approximation ADC with on-chip track-and-hold
- No pipeline delay or latency, ideal for multiplexed channel applications
- Pseudo-differential analog input range from 0 V to VREF (up to VDD)
- Proprietary serial interface compatible with SPI, QSPI, MICROWIRE, and DSP
- Daisy-chain capability for multiple ADCs with BUSY indicator
- Low power dissipation: 1.4 µW at 2.5 V/100 SPS, 1.35 mW at 2.5 V/100 kSPS
- Pin-for-pin compatibility with AD7686, AD7687, and AD7688
Applications
The AD7685 is suitable for a variety of applications that require high-resolution and low-power analog-to-digital conversion. These include:
- Industrial control systems
- Medical devices
- Automotive systems
- Data acquisition systems
- Portable and battery-powered devices
Q & A
- What is the resolution of the AD7685 ADC?
The AD7685 has a 16-bit resolution with no missing codes.
- What is the sampling rate of the AD7685?
The AD7685 has a sampling rate of 250 kSPS.
- What is the input type of the AD7685?
The AD7685 has a pseudo-differential analog input.
- What is the supply voltage range for the AD7685?
The AD7685 operates with a supply voltage range of 2.3V to 5.5V for both analog and digital supplies.
- What is the power dissipation of the AD7685?
The power dissipation is 1.35 mW at 2.5V/100 kSPS and 4 mW at 5V/100 kSPS.
- What is the standby current of the AD7685?
The standby current is 1 nA.
- In what package types is the AD7685 available?
The AD7685 is available in 10-lead LFCSP and MSOP packages.
- What is the operating temperature range of the AD7685?
The operating temperature range is -40°C to +85°C.
- Is the AD7685 compatible with other ADCs in the PulSAR series?
Yes, the AD7685 is pin-for-pin compatible with the AD7686, AD7687, and AD7688.
- What interfaces does the AD7685 support?
The AD7685 supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces.
