Overview
The ADS4128IRGZT is a 12-bit analog-to-digital converter (ADC) produced by Texas Instruments. This device is designed to operate at high sampling rates of up to 200 million samples per second (MSPS) while consuming extremely low power from a 1.8-V single supply. The ADS4128IRGZT is well-suited for multi-carrier, wide-bandwidth communications applications due to its innovative design techniques that achieve high dynamic performance.
The device features dynamic power scaling with the sample rate, ensuring no loss in performance at lower sampling rates. It also includes a DC offset correction loop and supports low input clock amplitudes down to 200 mVPP. The ADS4128IRGZT is available in a compact 48-pin VQFN package with an exposed thermal pad and is specified over the industrial temperature range of –40°C to 85°C.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits |
| Sampling Rate | - | 200 | 200 | MSPS |
| Supply Voltage (AVDD) | -0.3 | 1.8 | 2.1 | V |
| Total Power at 200 MSPS | - | 230 | - | mW |
| Signal-to-Noise Ratio (SNR) at 170 MHz | - | 69 | - | dBFS |
| Spurious Free Dynamic Range (SFDR) at 170 MHz | - | 85 | - | dBc |
| Differential Input Voltage Range | - | 2 | - | VPP |
| Analog Input Bandwidth | - | 550 | - | MHz |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | VQFN-48 | - | - |
| Package Size | - | 7.00 mm × 7.00 mm | - | - |
Key Features
- Maximum sample rate of 200 MSPS
- Ultralow power consumption with 1.8-V single supply, totaling 230 mW at 200 MSPS
- High dynamic performance: SNR of 69 dBFS and SFDR of 85 dBc at 170 MHz
- Dynamic power scaling with sample rate
- Output interface: Double Data Rate (DDR) LVDS with programmable swing and strength, and 1.8-V parallel CMOS interface
- Programmable gain up to 6 dB for SNR and SFDR trade-off
- DC offset correction loop
- Supports low input clock amplitude down to 200 mVPP
Applications
- Wireless communications infrastructure
- Software-defined radio
- Power amplifier linearization
Q & A
- What is the maximum sampling rate of the ADS4128IRGZT?
The maximum sampling rate of the ADS4128IRGZT is 200 MSPS.
- What is the power consumption of the ADS4128IRGZT at 200 MSPS?
The total power consumption at 200 MSPS is 230 mW.
- What are the key dynamic performance metrics of the ADS4128IRGZT?
The device achieves an SNR of 69 dBFS and an SFDR of 85 dBc at 170 MHz.
- Does the ADS4128IRGZT support dynamic power scaling?
Yes, the device supports dynamic power scaling with the sample rate.
- What types of output interfaces does the ADS4128IRGZT support?
The device supports DDR LVDS with programmable swing and strength, as well as a 1.8-V parallel CMOS interface.
- Can the gain of the ADS4128IRGZT be programmed?
Yes, the gain can be programmed up to 6 dB for SNR and SFDR trade-off.
- Does the ADS4128IRGZT have a DC offset correction feature?
Yes, it includes a DC offset correction loop.
- What is the minimum input clock amplitude supported by the ADS4128IRGZT?
The device supports input clock amplitudes down to 200 mVPP.
- In what package is the ADS4128IRGZT available?
The device is available in a 48-pin VQFN package with an exposed thermal pad.
- What is the operating temperature range of the ADS4128IRGZT?
The operating temperature range is from –40°C to 85°C.
