Overview
The AD7264BCPZ-5, produced by Analog Devices Inc., is a dual, 14-bit, high-speed, low-power successive approximation analog-to-digital converter (ADC). This device operates from a single 5 V power supply and features throughput rates of up to 1 MSPS per on-chip ADC. It is designed for simultaneous sampling and conversion of two channels, each preceded by a true differential analog input with a programmable gain amplifier (PGA). The AD7264 includes four on-chip comparators and supports various gain settings, making it versatile for a range of applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Number of Bits | 14 | ||||
| Number of A/D Converters | 2 | ||||
| Sampling Rate (Per Second) | 1 MSPS | ||||
| Voltage - Supply, Digital | 2.7 | 5.25 | V | ||
| Voltage - Supply, Analog | 5 | V | |||
| Operating Temperature | -40 | 105 | °C | ||
| Input Type | Differential | ||||
| Reference Type | External, Internal | ||||
| Package / Case | 48-LFCSP-VQ (7x7) | ||||
| Signal-to-Noise Ratio (SNR) | 76 | 78 | dB | PGA gain setting = 2 | |
| Signal-to-(Noise + Distortion) Ratio (SINAD) | 74 | 77 | dB | PGA gain setting = 2 | |
| Total Harmonic Distortion (THD) | -85 | -77 | dB | PGA gain setting = 2 | |
| Common-Mode Rejection Ratio (CMRR) | -76 | dB | PGA gain setting = 2 | ||
Key Features
- Simultaneous Sampling and Conversion: Allows for the simultaneous sampling and conversion of two channels.
- Programmable Gain Amplifier (PGA): Offers 14 gain settings (×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128).
- On-Chip Comparators: Includes four comparators with different propagation delays; Comparator A and B are optimized for low power, while Comparator C and D have fast propagation delays.
- Calibration Function: Features device offset calibration and programmable gain adjust registers for input path compensation.
- On-Chip Reference: Includes a 2.5 V internal reference that can be disabled for external reference use.
- Data Interface: Compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
- Package Options: Available in 48-lead LFCSP and LQFP packages.
- Operating Temperature Range: Operates from -40°C to 105°C.
Applications
The AD7264 is ideally suited for monitoring small amplitude signals from various sensors. It is particularly useful in applications such as:
- Motor Control Systems: For monitoring position feedback signals from analog encoders.
- Sensor Monitoring: For monitoring signals from a variety of sensors, including those in industrial, medical, and automotive applications.
- Data Acquisition Systems: Where high-speed, low-power, and precise analog-to-digital conversion is required.
Q & A
- What is the resolution of the AD7264 ADC?
The AD7264 is a 14-bit analog-to-digital converter.
- What is the maximum sampling rate of the AD7264?
The AD7264 has a maximum sampling rate of 1 MSPS per ADC.
- How many gain settings are available on the AD7264?
The AD7264 offers 14 gain settings: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128.
- What types of comparators are included in the AD7264?
The AD7264 includes four comparators: two optimized for low power (Comparator A and B) and two with fast propagation delays (Comparator C and D).
- Can the AD7264 use an external reference voltage?
Yes, the AD7264 has an on-chip 2.5 V reference that can be disabled to use an external reference voltage.
- What are the package options for the AD7264?
The AD7264 is available in 48-lead LFCSP and LQFP packages.
- What is the operating temperature range of the AD7264?
The AD7264 operates from -40°C to 105°C.
- Is the AD7264 RoHS compliant?
Yes, the AD7264 is lead-free and RoHS compliant.
- What data interfaces does the AD7264 support?
The AD7264 supports SPI, QSPI, MICROWIRE, and DSP interfaces.
- What is the typical power consumption of the AD7264 in normal mode?
The typical power consumption is 31.5 mA when AVCC = 5.25 V.
