Overview
The AD7685BCPZRL is a high-performance, 16-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This ADC is designed for applications requiring high accuracy and low power consumption. It features a throughput rate of 250 kSPS and is available in a compact 10-lead LFCSP package, making it ideal for space-constrained designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 bits | |
| Throughput Rate | 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 (with VREF up to VDD) | |
| Supply Voltage | 2.3 V to 5.5 V | V |
| Logic Interface Voltage | 1.8 V to 5 V | 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 | W |
| Standby Current | 1 nA | A |
| Package Type | 10-lead LFCSP | |
| Operating Temperature Range | -40°C to +85°C | °C |
Key Features
- No missing codes and high accuracy with INL of ±0.6 LSB (typical) and ±2 LSB (maximum)
- Pseudo differential analog input range from 0 V to VREF with VREF up to VDD
- No pipeline delay, making it suitable for multiple multiplexed channel applications
- Single-supply operation with a wide supply voltage range of 2.3 V to 5.5 V and logic interface compatible with 1.8 V to 5 V digital logic families
- Low power consumption with power dissipation as low as 1.4 µW at 2.5 V/100 SPS and standby current of 1 nA
- Compact 10-lead LFCSP package, pin-for-pin-compatible with other PulSAR® ADCs like AD7686, AD7687, and AD7688
- Proprietary serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interfaces
- Daisy-chain capability for multiple ADCs and BUSY indicator for status monitoring
Applications
The AD7685BCPZRL is ideal for various applications requiring high precision and low power consumption, such as:
- Medical devices, including portable diagnostic equipment and patient monitoring systems
- Industrial automation and control systems, where precise analog-to-digital conversion is crucial
- Aerospace and defense applications, where reliability and accuracy are paramount
- Automotive systems, particularly in safety-critical and high-reliability applications
- Test and measurement equipment, where high resolution and low noise are essential
Q & A
- What is the resolution of the AD7685BCPZRL ADC?
The AD7685BCPZRL has a resolution of 16 bits.
- What is the throughput rate of the AD7685BCPZRL?
The throughput rate of the AD7685BCPZRL is 250 kSPS.
- What is the typical INL of the AD7685BCPZRL?
The typical INL of the AD7685BCPZRL is ±0.6 LSB.
- What is the SINAD of the AD7685BCPZRL at 20 kHz?
The SINAD of the AD7685BCPZRL at 20 kHz is 93.5 dB.
- What is the power dissipation of the AD7685BCPZRL at 2.5 V and 100 kSPS?
The power dissipation of the AD7685BCPZRL at 2.5 V and 100 kSPS is 1.35 mW.
- What is the standby current of the AD7685BCPZRL?
The standby current of the AD7685BCPZRL is 1 nA.
- In what package types is the AD7685BCPZRL available?
The AD7685BCPZRL is available in a 10-lead LFCSP package.
- Is the AD7685BCPZRL compatible with other PulSAR® ADCs?
Yes, the AD7685BCPZRL is pin-for-pin-compatible with other PulSAR® ADCs like AD7686, AD7687, and AD7688.
- What types of serial interfaces does the AD7685BCPZRL support?
The AD7685BCPZRL supports SPI, QSPI, MICROWIRE, and DSP interfaces.
- Can multiple AD7685BCPZRL ADCs be daisy-chained?
Yes, multiple AD7685BCPZRL ADCs can be daisy-chained, and they include a BUSY indicator for status monitoring.
