Overview
The ADS7822EB/2K5G4, produced by Texas Instruments, is a 12-bit sampling analog-to-digital (A/D) converter designed for high-speed and low-power applications. This microPower converter operates within a supply range of 2.7V to 5.25V and is capable of sampling at rates up to 200kHz. It is particularly suited for battery-operated systems, remote data acquisition modules, simultaneous multichannel systems, and isolated data acquisition due to its ultra-low power consumption and small size.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | - | 12 | 12 | 12 | Bits |
| No Missing Codes | - | 11 | 12 | 12 | Bits |
| Integral Linearity Error | - | -2 | - | +2 | LSB |
| Differential Linearity Error | - | ±0.8 | - | ±0.8 | LSB |
| Full-Scale Input Span | +In - (-In) | 0 | - | VREF | V |
| Absolute Input Range (+In) | - | -0.2 VCC | - | +0.2 VCC | V |
| Absolute Input Range (-In) | - | -0.2 | - | +1.0 | V |
| Capacitance | - | 25 | - | 25 | pF |
| Leakage Current | - | ±1 | - | ±1 | μA |
| Power Supply Range | - | 2.7 | - | 5.25 | V |
| Quiescent Current at 200kHz | - | 320 | - | 550 | μA |
| Power Down Current | - | 3 | - | 3 | μA |
| Temperature Range | - | -40 | - | +85 | °C |
Key Features
- High-Speed Sampling: Up to 200kHz sampling rate.
- Low Power Consumption: microPower design with power dissipation as low as 1.6mW at 200kHz and 60μW at 7.5kHz.
- Pseudo-Differential Input: Allows for differential input signals with the –In input not resampled later in the conversion cycle.
- Synchronous Serial Interface: Data clocked out serially, most significant bit first, on the DOUT pin.
- External Reference: Reference voltage can be set to any level between 50mV and VCC.
- Power Down Mode: Low power consumption in power-down mode, with a maximum current of 3μA.
- Compact Packaging: Available in mini-DIP-8, SO-8, and MSOP-8 packages.
Applications
- Battery-Operated Systems: Ideal for systems where low power consumption is critical.
- Remote Data Acquisition: Suitable for remote data acquisition modules due to its low power and small size.
- Simultaneous Multichannel Systems: Can be used in systems requiring simultaneous sampling of multiple channels.
- Isolated Data Acquisition: Appropriate for isolated data acquisition applications.
Q & A
- What is the resolution of the ADS7822EB/2K5G4?
The resolution of the ADS7822EB/2K5G4 is 12 bits.
- What is the maximum sampling rate of the ADS7822EB/2K5G4?
The maximum sampling rate is up to 200kHz.
- What is the power consumption at 200kHz sampling rate?
The power consumption is approximately 1.6mW at 200kHz.
- What is the range of the external reference voltage?
The external reference voltage can be set to any level between 50mV and VCC.
- What types of packages are available for the ADS7822EB/2K5G4?
The ADS7822EB/2K5G4 is available in mini-DIP-8, SO-8, and MSOP-8 packages.
- What is the power-down current of the ADS7822EB/2K5G4?
The power-down current is a maximum of 3μA.
- What is the temperature range for the ADS7822EB/2K5G4?
The specified temperature range is from –40°C to +85°C.
- Does the ADS7822EB/2K5G4 support pseudo-differential inputs?
Yes, it supports pseudo-differential inputs.
- How does the serial interface work on the ADS7822EB/2K5G4?
The data is clocked out serially, most significant bit first, on the DOUT pin synchronized by the DCLOCK input.
- What are some typical applications for the ADS7822EB/2K5G4?
Typical applications include battery-operated systems, remote data acquisition modules, simultaneous multichannel systems, and isolated data acquisition.
