0
ACTIVE
Resolution (Bits) |
12 |
Sample rate (max) (ksps) |
200 |
Number of input channels |
8 |
Interface type |
SPI |
Architecture |
SAR |
Input type |
Pseudo-Differential, 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 voltage (min) (V) |
2.7 |
Analog supply voltage (max) (V) |
5.25 |
SNR (dB) |
73.1 |
Digital supply (min) (V) |
1.9 |
Digital supply (max) (V) |
5.5 |
SSOP (DB)-20-56.16 mm² 7.2 x 7.8
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The ADS7844 is an 8-channel, 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface. Typical power dissipation is 3mW at a 200kHz throughput rate and a +5V supply. The reference voltage (VREF) can be varied between 100mV and VCC, providing a corresponding input voltage range of 0V to VREF. The device includes a shutdown mode which reduces power dissipation to under 1µW. The ADS7844 is guaranteed down to 2.7V operation.
Low power, high speed, and on-board multiplexer make the ADS7844 ideal for battery- operated systems such as personal digital assistants, portable multichannel data loggers, and measurement equipment. The serial interface also provides low-cost isolation for remote data acquisition. The ADS7844 is available in a 20-lead QSOP package and the MAX147 equivalent 20-lead SSOP is guaranteed over the 40°C to +85°C temperature range.
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