Overview
The ADC78H89 is a low-power, seven-channel CMOS 12-bit analog-to-digital converter (ADC) produced by Texas Instruments. This device is designed for high-performance applications requiring multiple analog input channels. It features a conversion throughput of 500 kilosamples per second (KSPS) and is based on a successive-approximation register architecture with an internal track-and-hold circuit. The ADC78H89 is suitable for a wide range of applications due to its low power consumption and flexible power management options.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12 | Bits |
| Conversion Rate | 500 | KSPS |
| Integral Non-Linearity (INL) | ±1 | LSB (max) |
| Differential Non-Linearity (DNL) | ±1 | LSB (max) |
| Offset Error | ±2 | LSB (max) |
| Analog Input Voltage Range | 0 to AVDD | V |
| Analog Supply Voltage (AVDD) | +2.7V to +5.25V | V |
| Digital Supply Voltage (DVDD) | +2.7V to AVDD | V |
| Power Consumption (Normal Mode, 3V Supply) | 1.5 | mW (typ) |
| Power Consumption (Normal Mode, 5V Supply) | 8.3 | mW (typ) |
| Power Consumption (Power-Down Mode, 3V Supply) | 0.3 | µW |
| Power Consumption (Power-Down Mode, 5V Supply) | 0.5 | µW |
| Operating Temperature Range | −40°C to +85°C | °C |
| Package Type | 16-lead TSSOP |
Key Features
- Low power consumption with variable power management
- Independent analog and digital supplies (AVDD and DVDD)
- SPI™/QSPI™/MICROWIRE™/DSP compatible serial interface
- Eight input channels (though the ADC78H89 has seven channels, the general feature applies to the series)
- Internal track-and-hold circuit
- Straight binary output coding
- Power-down mode to reduce power consumption significantly
Applications
- Automotive Navigation Systems
- Portable Systems
- Medical Instruments
- Mobile Communications
- Instrumentation and Control Systems
Q & A
- What is the resolution of the ADC78H89?
The ADC78H89 has a resolution of 12 bits.
- What is the conversion rate of the ADC78H89?
The conversion rate is 500 KSPS.
- What is the operating temperature range of the ADC78H89?
The operating temperature range is −40°C to +85°C.
- Can the ADC78H89 operate with independent analog and digital supplies?
- What is the typical power consumption of the ADC78H89 in normal mode using a 3V supply?
The typical power consumption is 1.5 mW.
- How many input channels does the ADC78H89 have?
The ADC78H89 has seven input channels.
- Is the ADC78H89 compatible with SPI, QSPI, MICROWIRE, and DSP serial interfaces?
- What is the output coding format of the ADC78H89?
The output coding format is straight binary.
- Does the ADC78H89 have a power-down mode?
- What is the package type of the ADC78H89?
The ADC78H89 is packaged in a 16-lead TSSOP.
