Overview
The ADS8861IDGSR, produced by Texas Instruments, is a 16-bit, 1-MSPS (mega-samples per second), true-differential input, successive approximation register (SAR) analog-to-digital converter (ADC). This device is designed for low-power, high-performance applications and features an SPI-compatible serial interface with daisy-chain capability. It operates with a wide range of external reference voltages (2.5 V to 5 V) and supports both unipolar and true-differential analog input signals.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Sample Rate | - | 1 | - | MSPS |
| Analog Supply Voltage (AVDD) | 2.7 | 3 | 3.6 | V |
| Digital Supply Voltage (DVDD) | 2.7 | 3 | 3.6 | V |
| Reference Voltage (VREF) | 2.5 | - | 5 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Power Consumption at 1 MSPS | - | 5.5 | - | mW |
| Power-Down Current | - | 50 | - | nA |
| Integral Nonlinearity (INL) | -1 | - | 1 | LSB |
| Differential Nonlinearity (DNL) | -1 | - | 1 | LSB |
| Signal-to-Noise Ratio (SNR) | - | 96 | - | dB |
| Total Harmonic Distortion (THD) | -115 | - | - | dB |
Key Features
- SPI-compatible serial interface with daisy-chain option for cascading multiple devices.
- True-differential analog input structure with a differential input swing of -VREF to +VREF.
- Wide common-mode voltage range: 0 V to VREF with 90-dB CMRR (min).
- Low-power operation: 5.5 mW at 1 MSPS, 0.55 mW at 100 kSPS, and 55 µW at 10 kSPS.
- No latency output and full-scale step settling to 16 bits in 290 ns.
- Excellent AC and DC performance: SNR of 96 dB, THD of -115 dB, INL of ±1.0 LSB (max), and DNL of ±1.0 LSB (max).
- Available in MSOP-10 and SON-10 packages.
Applications
- Automatic Test Equipment (ATE)
- Instrumentation and Process Controls
- Precision Medical Equipment
- Low-Power, Battery-Operated Instruments
Q & A
- What is the resolution of the ADS8861IDGSR ADC?
The ADS8861IDGSR has a resolution of 16 bits.
- What is the maximum sample rate of the ADS8861IDGSR?
The maximum sample rate is 1 MSPS.
- What is the range of the external reference voltage for the ADS8861IDGSR?
The external reference voltage range is from 2.5 V to 5 V.
- What is the common-mode voltage range for the ADS8861IDGSR?
The common-mode voltage range is from 0 V to VREF.
- How much power does the ADS8861IDGSR consume at 1 MSPS?
The power consumption at 1 MSPS is 5.5 mW.
- What is the power-down current of the ADS8861IDGSR?
The power-down current is 50 nA.
- What are the typical values for INL and DNL of the ADS8861IDGSR?
The typical values for INL and DNL are ±1.0 LSB (max).
- What is the signal-to-noise ratio (SNR) of the ADS8861IDGSR?
The SNR is 96 dB.
- What is the total harmonic distortion (THD) of the ADS8861IDGSR?
The THD is -115 dB.
- In what packages is the ADS8861IDGSR available?
The ADS8861IDGSR is available in MSOP-10 and SON-10 packages.
