The ADS7842 is a complete, 4-channel, 12-bit Analog-to-Digital Converter (ADC). It contains a 12-bit, capacitorbased, Successive Approximation Register (SAR) ADC with a sample-and-hold amplifier, interface for microprocessor use, and parallel, 3-state output drivers. The ADS7842 is specified at a 200kHz sampling rate while dissipating only 2mW of power. The reference voltage can be varied from 100mV to VCC with a corresponding LSB resolution from 24µV to 1.22mV. The ADS7842 is tested down to 2.7V operation.
Low power, high speed, and an onboard multiplexer make the ADS7842 ideal for battery-operated systems such as portable, multi-channel dataloggers and measurement equipment. The ADS7842 is available in an SSOP-28 package and is tested over the -40°C to +85°C temperature range.
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| Resolution (Bits) | 12 |
| Sample rate (max) (ksps) | 200 |
| Number of input channels | 4 |
| Interface type | Parallel |
| Architecture | SAR |
| Input type | Single-ended |
| Multichannel configuration | Multiplexed |
| Rating | Catalog |
| Reference mode | External |
| Input voltage range (max) (V) | 5.25 |
| Input voltage range (min) (V) | 0 |
| Operating temperature range (°C) | -40 to 85 |
| Power consumption (typ) (mW) | 1.8 |
| Analog supply (min) (V) | 2.7 |
| Analog supply voltage (max) (V) | 5.25 |
| SNR (dB) | 70 |
| Digital supply (min) (V) | 2.7 |
| Digital supply (max) (V) | 5.25 |
| SSOP (DB) | 28 | 79.56 mm² 10.2 x 7.8 |
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