Overview
The AD9237BCPZ-40 is a high-performance, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This monolithic ADC operates at sample rates of 20, 40, and 65 million samples per second (MSPS) and is designed for low power consumption and high accuracy. It features a multistage differential pipelined architecture with output error correction logic, ensuring 12-bit accuracy and no missing codes over the full operating temperature range of -40°C to +85°C. The AD9237 is fabricated on an advanced CMOS process and is available in a 32-lead Lead Frame Chip Scale Package (LFCSP).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 bits | |||
| Sample Rate | 20 | 40 | 65 | MSPS |
| Power Consumption @ 20 MSPS | 85 mW | |||
| Power Consumption @ 40 MSPS | 135 mW | |||
| Power Consumption @ 65 MSPS | 190 mW | |||
| Supply Voltage | 3 V | |||
| Digital Output Driver Supply | 2.5 V, 3.3 V | |||
| Input Range | 1 V p-p to 4 V p-p | |||
| Operating Temperature | -40 | +85 | °C | |
| Package Type | 32-Lead LFCSP (5mm x 5mm) | |||
| SNR @ 65 MSPS | 66 dBc | |||
| SFDR @ 65 MSPS | 80 dBc | |||
| DNL | ±0.7 LSB | |||
Key Features
- Ultra Low Power Consumption: The AD9237 consumes 85 mW at 20 MSPS, 135 mW at 40 MSPS, and 190 mW at 65 MSPS.
- High Performance Sample-and-Hold Amplifier (SHA): The patented SHA input maintains excellent performance for input frequencies beyond Nyquist and can be configured for single-ended or differential operation.
- Flexible Analog Input Ranges: The AD9237 is optimized for selectable and flexible input ranges from 1 V p-p to 4 V p-p.
- Output Enable Pin: Allows for multiplexing of the outputs.
- Two-Step Power-Down: Supports a standby mode in addition to a power-down mode.
- Out-of-Range (OTR) Signal: Indicates when the signal is beyond the selected input range.
- Clock Duty Cycle Stabilizer (DCS): Maintains converter performance over a wide range of clock pulse widths.
Applications
The AD9237 is suitable for various high-performance applications, including:
- Imaging Systems: Due to its high accuracy and low power consumption, it is ideal for imaging applications.
- Medical Ultrasound: The AD9237's high sample rates and low power make it a good fit for medical ultrasound devices.
- Multiplexed Systems: It can handle full-scale voltage levels in successive channels and sample single-channel inputs at frequencies well beyond the Nyquist rate.
Q & A
- What is the resolution of the AD9237 ADC?
The AD9237 has a resolution of 12 bits.
- What are the sample rates supported by the AD9237?
The AD9237 supports sample rates of 20, 40, and 65 MSPS.
- What is the power consumption of the AD9237 at different sample rates?
The power consumption is 85 mW at 20 MSPS, 135 mW at 40 MSPS, and 190 mW at 65 MSPS.
- What is the operating temperature range of the AD9237?
The operating temperature range is -40°C to +85°C.
- What package type is the AD9237 available in?
The AD9237 is available in a 32-Lead LFCSP (5mm x 5mm) package.
- Can the AD9237 be configured for single-ended or differential operation?
Yes, the AD9237 can be configured for both single-ended and differential operation.
- What is the significance of the out-of-range (OTR) signal in the AD9237?
The OTR signal indicates when the input signal is beyond the selected input range.
- How does the clock duty cycle stabilizer (DCS) function in the AD9237?
The DCS maintains converter performance over a wide range of clock pulse widths.
- What are some typical applications of the AD9237?
The AD9237 is typically used in imaging systems, medical ultrasound, and multiplexed systems.
- Does the AD9237 support power-down modes?
Yes, the AD9237 supports a standby mode in addition to a power-down mode.
