Overview
The ADS1283IRHFT, produced by Texas Instruments, is a high-performance, single-chip analog-to-digital converter (ADC) designed for demanding applications such as seismic monitoring and high-accuracy instrumentation. This device integrates a low-noise programmable gain amplifier (PGA) and a two-channel input multiplexer, making it highly versatile and accurate. The ADS1283 uses a fourth-order, inherently stable delta-sigma (ΔΣ) modulator to achieve outstanding noise and linearity performance. The converter is available in a compact 24-lead VQFN package and is fully specified from –40°C to +85°C, with a maximum operating temperature range of –50°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Signal-to-Noise Ratio (SNR) | 130 dB (at 250 SPS, PGA = 1) | dB |
| Total Harmonic Distortion (THD) | –122 dB (PGA = 1, 2, 4, or 8) | dB |
| Power Consumption | 18 mW (PGA = 1, 2, 4, or 8), 10 μW (Shutdown Mode) | mW / μW |
| Analog Supply | 5 V or ±2.5 V | V |
| Digital Supply | 1.8 V to 3.3 V | V |
| Data Rate | 250 to 4000 SPS (FIR filter mode), 8000 to 128,000 SPS (Sinc filter mode) | SPS |
| Resolution | 31 Bits | Bits |
| Gain Error | –1.5% to –0.5% (before calibration), 0.0002% (after calibration) | % |
| Common-Mode Rejection (CMR) | 95 to 110 dB | dB |
| Power-Supply Rejection (PSR) | 80 to 115 dB | dB |
Key Features
- Inherently-stable fourth-order delta-sigma (ΔΣ) modulator for outstanding noise and linearity performance.
- Integrated low-noise programmable gain amplifier (PGA) with gains of 1, 2, 4, 8, 16, 32, and 64.
- Two-channel input multiplexer with external and internal self-test input connections.
- Flexible digital filter with selectable Sinc, FIR, and IIR filters, and programmable high-pass filter.
- Selectable data rates from 250 to 4000 SPS in FIR filter mode and up to 128,000 SPS in Sinc filter mode.
- Offset and gain calibration engine for precise system calibration.
- Synchronization input (SYNC) for synchronizing multiple ADS1283 devices.
- Compact 24-lead VQFN package with thermal pad for improved thermal management.
Applications
- Seismic monitoring equipment due to its high accuracy and low noise characteristics.
- Energy exploration for precise data acquisition in harsh environments.
- High-accuracy instrumentation where precise analog-to-digital conversion is critical.
Q & A
- What is the signal-to-noise ratio (SNR) of the ADS1283?
The SNR of the ADS1283 is up to 130 dB at 250 SPS with PGA = 1.
- What are the power consumption and shutdown mode power of the ADS1283?
The power consumption is 18 mW (PGA = 1, 2, 4, or 8), and the shutdown mode power is 10 μW.
- What are the analog and digital supply voltage ranges for the ADS1283?
The analog supply voltage range is 5 V or ±2.5 V, and the digital supply voltage range is 1.8 V to 3.3 V.
- What data rates are supported by the ADS1283?
The ADS1283 supports data rates from 250 to 4000 SPS in FIR filter mode and up to 128,000 SPS in Sinc filter mode.
- What is the resolution of the ADS1283?
The resolution of the ADS1283 is 31 bits.
- Does the ADS1283 have built-in calibration features?
Yes, the ADS1283 includes an offset and gain calibration engine for precise system calibration.
- Can multiple ADS1283 devices be synchronized?
Yes, the synchronization input (SYNC) allows for synchronizing multiple ADS1283 devices.
- What are the typical applications of the ADS1283?
The ADS1283 is typically used in seismic monitoring, energy exploration, and high-accuracy instrumentation.
- What is the operating temperature range of the ADS1283?
The operating temperature range is from –40°C to +85°C, with a maximum operating temperature range of –50°C to +125°C.
- What is the package type and size of the ADS1283?
The ADS1283 is available in a compact 24-lead VQFN package, measuring 5 mm × 4 mm.
