+3V, 400ksps, 4/8 Channel, 8-Bit ADCs with 1µA Power Down
Low-Power +3V 8-Bit ADCs with Parallel Interface
DescriptionThe MAX113/MAX117 are microprocessor-compatible, 8-bit, 4-channel and 8-channel analog-to-digital converters (ADCs). They operate from a single +3V supply and use a half-flash technique to achieve a 1.8µs conversion time (400ksps). A power-down pin (active-low PWRDN) reduces current consumption to 1µA typical. The devices return from power-down mode to normal operating mode in less than 900ns, allowing large supply-current reductions in Burst Mode® applications. (In Burst Mode, the ADC wakes up from a low-power state at specified intervals to sample the analog input signals.) Both converters include a track/hold, enabling the ADC to digitize fast analog signals.
Microprocessor (µP) interfaces are simplified because the ADC can appear as a memory location or I/O port without external interface logic. The data outputs use latched, three-state buffer circuitry for direct connection to an 8-bit parallel µP data bus or system input port. The MAX113/MAX117 input/reference configuration enables ratiometric operation.
The 4-channel MAX113 is available in a 24-pin DIP or SSOP. The 8-channel MAX117 is available in a 28-pin DIP or SSOP. For +5V applications, refer to the MAX114/MAX118 data sheet.
- +3.0V to +3.6V Single-Supply Operation
- 4 (MAX113) or 8 (MAX117) Analog Input Channels
- Low Power:
- 1.5mA (operating mode)
- 1µA (power-down mode)
- Total Unadjusted Error < 1LSB
- Fast Conversion Time: 1.8µs per Channel
- No External Clock Required
- Internal Track/Hold
- Ratiometric Reference Inputs
- Internally Connected 8th Channel Monitors Reference Voltage (MAX117)
- Battery-Powered Applications
- Communication Systems
- Portable Equipment
- Remote Data Acquisition
- System-Health Monitoring
|Input Chan.||Conv. Rate|
|ADC Architecture||Data Bus||Diff/S.E. Input||External VREF|
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|