Overview
The ADS8598H, produced by Texas Instruments, is an 8-channel integrated data acquisition (DAQ) system based on an 18-bit successive approximation (SAR) analog-to-digital converter (ADC). This device is designed to simultaneously sample all eight input channels, achieving a maximum throughput of 500 kSPS per channel. It features a complete analog front-end (AFE) for each channel, including a programmable gain amplifier (PGA), high input impedance, input clamp, low-pass filter, and an ADC input driver. The ADS8598H also includes a low-drift, precision reference with a buffer to drive the ADC and supports flexible digital interfaces for serial, parallel, and parallel byte communication.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 18 |
| Sampling Rate (Per Second) | 500 kSPS |
| Number of Inputs | 8 |
| Input Type | Pin-Programmable Bipolar Inputs: ±10 V and ±5 V |
| Input Impedance | 1 MΩ |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 2.3 V to 5.25 V |
| Data Interface | Parallel, Byte, Serial |
| Architecture | SAR (Successive Approximation Register) |
| Reference Type | Internal (2.5 V) and External |
| Operating Temperature Range | –40°C to +125°C |
| Package | 64-LQFP (10x10 mm) |
Key Features
- 18-Bit ADC with integrated analog front-end (AFE) for each channel.
- Simultaneous sampling of all eight channels.
- Pin-programmable bipolar inputs: ±10 V and ±5 V.
- High input impedance of 1 MΩ.
- 5-V analog supply and 2.3-V to 5-V I/O supply.
- Overvoltage input clamp with 9-kV ESD protection.
- Low-drift, on-chip reference (2.5 V) and buffer.
- Excellent performance: 500-kSPS max throughput, DNL: ±0.5 LSB typ, INL: ±2.0 LSB typ, SNR: 94 dB typ, THD: −109 dB typ.
- Over temperature performance: Max offset drift 3 ppm/°C, gain drift 6 ppm/°C.
- On-chip digital filter for oversampling.
- Flexible parallel, byte, and serial interface.
Applications
- Monitoring and control for power grids.
- Protection relays.
- Multi-phase motor controls.
- Industrial automation and controls.
- Multichannel data acquisition systems.
Q & A
- What is the resolution of the ADS8598H ADC?
The ADS8598H has an 18-bit resolution.
- How many input channels does the ADS8598H have?
The ADS8598H has 8 input channels.
- What is the maximum sampling rate of the ADS8598H?
The maximum sampling rate is 500 kSPS per channel.
- What types of inputs can the ADS8598H accept?
The device can accept ±10 V and ±5 V true bipolar inputs.
- What is the input impedance of the ADS8598H?
The input impedance is 1 MΩ.
- What is the operating temperature range of the ADS8598H?
The operating temperature range is –40°C to +125°C.
- What types of digital interfaces does the ADS8598H support?
The device supports parallel, byte, and serial interfaces.
- Does the ADS8598H have built-in overvoltage protection?
Yes, it has an overvoltage input clamp with 9-kV ESD protection.
- What is the package type of the ADS8598H?
The package type is 64-LQFP (10x10 mm).
- What are some common applications of the ADS8598H?
Common applications include industrial automation, power grid monitoring, protection relays, and multichannel data acquisition systems.
