Overview
The AD9235BRUZRL7-20, produced by Analog Devices Inc., is a high-performance 12-bit analog-to-digital converter (ADC) designed for various high-speed applications. This ADC operates at sample rates of 20, 40, and 65 MSPS and 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. It is fabricated on an advanced CMOS process and is available in a 28-lead thin shrink small outline package (TSSOP) and a 32-lead chip scale package (LFCSP).
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sample Rate | 20, 40, 65 MSPS |
| Supply Voltage | Single +3 V (2.7 V to 3.6 V) |
| Power Consumption | 300 mW at 65 MSPS |
| Input Range | 1 Vp-p to 2 Vp-p |
| Input Type | Differential with 500 MHz bandwidth |
| SNR | 70 dBc to Nyquist at 65 MSPS |
| SFDR | 85 dBc to Nyquist at 65 MSPS |
| DNL | ±0.4 LSB |
| Package | 28-Lead TSSOP, 32-Lead LFCSP |
| Operating Temperature | –40°C to +85°C |
Key Features
- High-performance sample-and-hold amplifier (SHA) with excellent performance for input frequencies up to 100 MHz.
- On-chip voltage reference.
- Flexible analog input: 1 Vp-p to 2 Vp-p, single-ended or differential operation.
- Clock duty cycle stabilizer (DCS) to maintain ADC performance over a wide range of clock pulse widths.
- Digital output data presented in straight binary or twos complement formats.
- Out-of-range (OTR) signal indicates overflow condition.
- Separate digital output driver supply to accommodate 2.5 V and 3.3 V logic families.
- Pinout similar to AD9214-65, allowing simplified upgrade path from 10 bits to 12 bits for 65 MSPS systems.
Applications
- Ultrasound equipment.
- IF sampling in communications receivers.
- Battery-powered instruments.
- Hand-held scopemeters.
- Low-cost digital oscilloscopes.
Q & A
- What is the resolution of the AD9235BRUZRL7-20?
The AD9235BRUZRL7-20 has a resolution of 12 bits.
- What are the sample rates supported by the AD9235BRUZRL7-20?
The AD9235BRUZRL7-20 supports sample rates of 20, 40, and 65 MSPS.
- What is the power consumption of the AD9235BRUZRL7-20 at 65 MSPS?
The power consumption is 300 mW at 65 MSPS.
- What types of input can the AD9235BRUZRL7-20 handle?
The AD9235BRUZRL7-20 can handle differential inputs with a bandwidth of 500 MHz and can be configured for single-ended operation as well.
- What is the operating temperature range of the AD9235BRUZRL7-20?
The operating temperature range is –40°C to +85°C.
- What packages are available for the AD9235BRUZRL7-20?
The AD9235BRUZRL7-20 is available in 28-Lead TSSOP and 32-Lead LFCSP packages.
- Does the AD9235BRUZRL7-20 have an on-chip voltage reference?
Yes, the AD9235BRUZRL7-20 features an on-chip voltage reference.
- What is the significance of the clock duty cycle stabilizer (DCS) in the AD9235BRUZRL7-20?
The DCS compensates for wide variations in the clock duty cycle, maintaining excellent overall ADC performance.
- How does the AD9235BRUZRL7-20 indicate an overflow condition?
An out-of-range (OTR) signal indicates an overflow condition that can be used with the most significant bit to determine low or high overflow.
- What are some common applications of the AD9235BRUZRL7-20?
Common applications include ultrasound equipment, IF sampling in communications receivers, battery-powered instruments, hand-held scopemeters, and low-cost digital oscilloscopes.
