Overview
The ADS7953SDBT is a 12-bit, 1-MSPS (mega-samples per second), 16-channel, single-ended analog-to-digital converter (ADC) produced by Texas Instruments. It belongs to the ADS79xx family, which includes pin-compatible multichannel ADCs with resolutions of 12, 10, and 8 bits. This device is particularly notable for its low power consumption, making it suitable for battery-powered and isolated power-supply applications. The ADS7953SDBT features a capacitor-based SAR (Successive Approximation Register) A/D converter with inherent sample and hold, and it is available in a 38-pin TSSOP (Thin Shrink Small Outline Package) package.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sample Rate | 1 MSPS |
| Number of Channels | 16 channels |
| Input Type | Single-ended |
| Analog Supply Range | 2.7 V to 5.25 V |
| I/O Supply Range | 1.7 V to 5.25 V |
| Serial Interface Speed | 20 MHz |
| Input Ranges | 0 V to VREF and 0 V to 2 × VREF |
| Power Dissipation | Typical 14.5 mW (+VA = 5 V, +VBD = 3 V) at 1 MSPS |
| Power-Down Current | 1 µA |
| Input Bandwidth | 47 MHz at 3 dB |
| Package Type | 38-pin TSSOP (DBT) |
| Operating Temperature Range | -40°C to 125°C |
Key Features
- 1-MHz sample rate with zero latency
- 20-MHz serial interface controlled by CS and SCLK
- Auto and manual modes for channel selection
- Two software-selectable unipolar input ranges: 0 V to VREF and 0 V to 2 × VREF
- Four individually configurable GPIOs in TSSOP package (one in VQFN package)
- Two programmable alarm levels per channel
- Low power consumption suitable for battery-powered applications
- Power-down feature with 1 µA current
- Wide analog and I/O supply ranges for flexible integration
Applications
The ADS7953SDBT is versatile and suitable for a variety of data acquisition applications. Its low power consumption and wide supply voltage ranges make it ideal for:
- Battery-powered devices
- Isolated power-supply applications
- Industrial automation and control systems
- Medical devices requiring precise analog-to-digital conversion
- Aerospace and defense systems where low power and high accuracy are critical
Q & A
- What is the resolution of the ADS7953SDBT?
The ADS7953SDBT has a 12-bit resolution.
- What is the sample rate of the ADS7953SDBT?
The sample rate is 1 MSPS (mega-samples per second).
- How many channels does the ADS7953SDBT support?
The device supports 16 single-ended channels.
- What is the analog supply range for the ADS7953SDBT?
The analog supply range is from 2.7 V to 5.25 V.
- What is the serial interface speed of the ADS7953SDBT?
The serial interface speed is up to 20 MHz.
- Does the ADS7953SDBT support auto and manual channel selection?
Yes, it supports both auto and manual modes for channel selection.
- What is the typical power dissipation of the ADS7953SDBT at 1 MSPS?
The typical power dissipation is 14.5 mW (+VA = 5 V, +VBD = 3 V) at 1 MSPS.
- What is the power-down current of the ADS7953SDBT?
The power-down current is 1 µA.
- What is the input bandwidth of the ADS7953SDBT?
The input bandwidth is 47 MHz at 3 dB.
- In what package is the ADS7953SDBT available?
The device is available in a 38-pin TSSOP (DBT) package.
