Overview
The AD9238BST-40 is a high-performance, dual 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD9238 series and is specifically designed for applications requiring high-speed and high-accuracy data conversion. The AD9238 features two independent ADC paths, each with a proprietary front-end sample-and-hold amplifier (SHA) followed by a pipelined switched capacitor ADC architecture. This design ensures high accuracy and no missing codes over the full operating temperature range up to 65 MSPS data rates.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Sample Rate | 20/40/65 MSPS | |
| Input Range | 1 V p-p to 2 V p-p | |
| Input Type | Differential | |
| Operating Temperature | –40°C to +85°C | |
| Power Consumption (40 MSPS) | 330 mW | |
| Package Type | 64-Lead Low Profile Quad Flat Pack (LQFP) | |
| Channel Isolation | 85 dB at fIN = 10 MHz | |
| Logic Input Voltage | 2.0 V (High), 0.8 V (Low) | V |
| Logic Output Voltage | DRVDD - 0.05 V (High), 0.05 V (Low) | V |
Key Features
- Dual high-performance sample-and-hold amplifiers (SHAs) with differential inputs and a bandwidth of 500 MHz, 3 dB.
- Flexible analog input range: 1 V p-p to 2 V p-p, with options for ac- or dc-coupled and differential or single-ended modes.
- Integrated voltage reference with options for fixed or adjustable reference voltages.
- Output data format options: offset binary or two's complement.
- Clock duty cycle stabilizer and output data multiplexing option.
- Low power consumption with speed grade options: 180 mW at 20 MSPS, 330 mW at 40 MSPS, and 600 mW at 65 MSPS.
- Pb-free, space-saving 64-lead LQFP or LFCSP package.
Applications
- Ultrasound equipment
- Direct conversion or IF sampling receivers
- WB-CDMA, CDMA2000, WiMAX
- Battery-powered instruments
- Hand-held oscilloscopes and low-cost digital oscilloscopes
Q & A
- What is the resolution of the AD9238BST-40?
The AD9238BST-40 has a resolution of 12 bits.
- What are the sample rate options for the AD9238BST-40?
The sample rate options are 20 MSPS, 40 MSPS, and 65 MSPS.
- What is the input range of the AD9238BST-40?
The input range is from 1 V p-p to 2 V p-p.
- What type of input does the AD9238BST-40 support?
The AD9238BST-40 supports differential inputs.
- What is the operating temperature range of the AD9238BST-40?
The operating temperature range is from –40°C to +85°C.
- How much power does the AD9238BST-40 consume at 40 MSPS?
The power consumption at 40 MSPS is approximately 330 mW.
- What package type is the AD9238BST-40 available in?
The AD9238BST-40 is available in a 64-lead Low Profile Quad Flat Pack (LQFP).
- What is the channel isolation of the AD9238BST-40?
The channel isolation is 85 dB at fIN = 10 MHz.
- What are the logic input voltage levels for the AD9238BST-40?
The logic input voltage levels are 2.0 V (High) and 0.8 V (Low).
- What are some typical applications of the AD9238BST-40?
Typical applications include ultrasound equipment, direct conversion or IF sampling receivers, WB-CDMA, CDMA2000, WiMAX, battery-powered instruments, and hand-held oscilloscopes.
