Overview
The ADS7844NB/1KG4 is a 12-bit, 8-channel serial output sampling analog-to-digital converter (ADC) manufactured by Texas Instruments. This device features a successive approximation register (SAR) architecture and is designed for high-speed, low-power applications. It operates from a single supply voltage ranging from 2.7V to 5.25V and includes an onboard multiplexer, allowing for both single-ended and differential analog inputs. The ADS7844 is ideal for battery-operated systems, personal digital assistants, portable multichannel data loggers, and various measurement equipment due to its low power consumption and high speed.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 12 | bits | |||
| Number of Channels | 8 | ||||
| Conversion Rate | fSAMPLE = 200kHz, +VCC = 5V | 200kHz | kHz | ||
| Supply Voltage | 2.7V | 5.25V | V | ||
| Power Dissipation | fSAMPLE = 200kHz, +VCC = 5V | 3mW | mW | ||
| Integral Linearity Error (INL) | ±1 LSB | LSB | |||
| Differential Linearity Error (DNL) | ±1 LSB | LSB | |||
| Signal-to-Noise and Distortion Ratio (SINAD) | fIN = 10kHz | 72dB | dB | ||
| Operating Temperature Range | –40°C | +85°C | °C | ||
| Package Type | 20-lead SSOP |
Key Features
- Single supply operation: 2.7V to 5.25V
- 8-channel single-ended or 4-channel differential analog inputs
- Up to 200kHz conversion rate
- High accuracy: ±1 LSB INL and DNL, no missing codes
- Low power dissipation: 3mW at 200kHz throughput rate and +5V supply
- Shutdown mode reduces power dissipation to under 1µW
- Synchronous serial interface for low-cost isolation in remote data acquisition
- Onboard multiplexer for flexible input configurations
- External reference voltage range: 100mV to VCC
Applications
- Data acquisition systems
- Test and measurement equipment
- Industrial process control
- Personal digital assistants
- Battery-powered systems
- Portable multichannel data loggers
- Measurement equipment
Q & A
- What is the resolution of the ADS7844NB/1KG4 ADC?
The resolution of the ADS7844NB/1KG4 is 12 bits.
- How many analog input channels does the ADS7844NB/1KG4 have?
The device has 8 single-ended or 4 differential analog input channels.
- What is the maximum conversion rate of the ADS7844NB/1KG4?
The maximum conversion rate is up to 200kHz.
- What is the supply voltage range for the ADS7844NB/1KG4?
The supply voltage range is from 2.7V to 5.25V.
- How much power does the ADS7844NB/1KG4 dissipate at 200kHz throughput rate and +5V supply?
The power dissipation is typically 3mW at 200kHz throughput rate and +5V supply.
- What is the operating temperature range of the ADS7844NB/1KG4?
The operating temperature range is from –40°C to +85°C.
- What type of package is the ADS7844NB/1KG4 available in?
The device is available in a 20-lead SSOP package.
- Does the ADS7844NB/1KG4 have a shutdown mode?
Yes, the device has a shutdown mode that reduces power dissipation to under 1µW.
- What is the range for the external reference voltage of the ADS7844NB/1KG4?
The external reference voltage can range from 100mV to VCC.
- What are some typical applications of the ADS7844NB/1KG4?
Typical applications include data acquisition systems, test and measurement equipment, industrial process control, personal digital assistants, and battery-powered systems.
