Overview
The AD9238BSTZ-40 is a dual, 3 V, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component features dual high-performance sample-and-hold amplifiers (SHAs) and an integrated voltage reference. It uses a multistage differential pipelined architecture with output error correction logic to ensure 12-bit accuracy and guarantee no missing codes over the full operating temperature range. The AD9238 is available in a space-saving 64-lead LQFP or LF-CSP package and is specified over the industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Sampling Rate | 40 MSPS (AD9238BSTZ-40) |
| Supply Voltage | 2.7 V to 3.6 V |
| Power Consumption | 330 mW at 40 MSPS |
| Signal-to-Noise Ratio (SNR) | 70 dB (to Nyquist, AD9238-65) |
| Spurious-Free Dynamic Range (SFDR) | 80.5 dBc (to Nyquist, AD9238-65) |
| Analog Input Bandwidth | 500 MHz, 3 dB bandwidth |
| Crosstalk Immunity | > 85 dB |
| Analog Input Range | 1 V p-p to 2 V p-p |
| Data Format | Offset binary or twos complement |
| Package Type | 64-lead LQFP or LF-CSP |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Integrated dual 12-bit ADC with dual high-performance sample-and-hold amplifiers and an integrated voltage reference.
- Single 3 V supply operation (2.7 V to 3.6 V).
- Low power consumption: 330 mW at 40 MSPS.
- Differential input with 500 MHz, 3 dB bandwidth.
- Exceptional crosstalk immunity > 85 dB.
- Flexible analog input: 1 V p-p to 2 V p-p range.
- Offset binary or twos complement data format.
- Clock duty cycle stabilizer.
- Output datamux option.
- Pin-compatible with the AD9248, 14-bit ADC.
Applications
- Communications: Direct conversion or IF sampling receivers, WB-CDMA, CDMA2000, WiMAX.
- Imaging: Medical ultrasound equipment.
- Battery-powered instruments: Hand-held scopemeters, low-cost digital oscilloscopes.
Q & A
- What is the resolution of the AD9238BSTZ-40?
The AD9238BSTZ-40 has a resolution of 12 bits.
- What are the sampling rate options for the AD9238?
The AD9238 is available in speed grades of 20 MSPS, 40 MSPS, and 65 MSPS. The AD9238BSTZ-40 specifically operates at 40 MSPS.
- What is the power consumption of the AD9238BSTZ-40 at 40 MSPS?
The power consumption is 330 mW at 40 MSPS.
- What is the signal-to-noise ratio (SNR) of the AD9238?
The SNR is 70 dB (to Nyquist, AD9238-65).
- What is the spurious-free dynamic range (SFDR) of the AD9238?
The SFDR is 80.5 dBc (to Nyquist, AD9238-65).
- What is the analog input bandwidth of the AD9238?
The analog input bandwidth is 500 MHz, 3 dB bandwidth.
- What is the crosstalk immunity of the AD9238?
The crosstalk immunity is greater than 85 dB.
- What are the available data formats for the AD9238?
The data formats available are offset binary or twos complement.
- Does the AD9238 have a clock duty cycle stabilizer?
Yes, the AD9238 includes a clock duty cycle stabilizer.
- In what package types is the AD9238 available?
The AD9238 is available in 64-lead LQFP or LF-CSP packages.
