Overview
The ADS7886 is a 12-bit, 1-MSPS (mega-samples per second) analog-to-digital converter (ADC) produced by Texas Instruments. This device features a capacitor-based successive approximation register (SAR) A/D converter with inherent sample and hold circuitry. It operates over a wide supply range from 2.35 V to 5.25 V, making it suitable for a variety of applications, including battery-powered systems. The ADS7886 is designed for low power consumption, with a typical power dissipation of 3.9 mW at 3 V and 7.5 mW at 5 V, and includes a power-down feature for additional power savings.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 | Bits | ||
| Sample Rate | 1 | MSPS | ||
| Supply Voltage | 2.35 | 5.25 | V | |
| Power Dissipation at 1 MSPS | 3.9 mW (at 3 V) | 7.5 mW (at 5 V) | mW | |
| Integral Nonlinearity (INL) | -1.25 | ±0.65 | 1.25 | LSB |
| Differential Nonlinearity (DNL) | -1 | +0.4 / -0.65 | 1 | LSB |
| Offset Error | -2.5 | ±0.5 | 2.5 | LSB (VDD = 2.35 V to 3.6 V) |
| Gain Error | -1.75 | ±0.5 | 1.75 | LSB |
| Conversion Time | 760-800 | ns (20-MHz SCLK) | ||
| Acquisition Time | 325 | ns | ||
| Maximum Throughput Rate | 1 | MHz (20-MHz SCLK) | ||
| Aperture Delay | 5 | ns | ||
| Input Capacitance | 21 | pF |
Key Features
- 12-bit resolution with zero latency
- 1-MHz sample rate with a 20-MHz serial interface
- Wide supply range: 2.35 V to 5.25 V
- Low power consumption: typical 3.9 mW at 3 V and 7.5 mW at 5 V
- Power-down feature for power saving
- Unipolar input range: 0 V to VDD
- High input bandwidth: 15 MHz at 3 dB
- Available in 6-pin SOT-23 and SC70 packages
- Operating temperature range: -40°C to 125°C
Applications
- Base band converters in radio communication
- Motor current and bus voltage sensors in digital drives
- Optical networking (DWDM, MEMS-based switching)
- Optical sensors
- Battery-powered systems
- Medical instrumentations
- High-speed data acquisition systems
- High-speed closed-loop systems
Q & A
- What is the resolution of the ADS7886 ADC? The ADS7886 has a 12-bit resolution.
- What is the maximum sample rate of the ADS7886? The maximum sample rate is 1 MSPS.
- What is the supply voltage range for the ADS7886? The supply voltage range is from 2.35 V to 5.25 V.
- How much power does the ADS7886 typically consume at 1 MSPS? At 1 MSPS, the typical power consumption is 3.9 mW at 3 V and 7.5 mW at 5 V.
- What is the input range for the ADS7886? The input range is unipolar from 0 V to VDD.
- What are the package options for the ADS7886? The ADS7886 is available in 6-pin SOT-23 and SC70 packages.
- What is the operating temperature range for the ADS7886? The operating temperature range is from -40°C to 125°C.
- Does the ADS7886 have a power-down feature? Yes, the ADS7886 includes a power-down feature for power saving.
- What is the typical input capacitance of the ADS7886? The typical input capacitance is 21 pF.
- What are some common applications of the ADS7886? Common applications include base band converters, motor current and bus voltage sensors, optical networking, optical sensors, battery-powered systems, medical instrumentations, and high-speed data acquisition systems.
