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Data Converters 
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Analog-to-Digital Converters
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MAX117
+3V, 400ksps, 4/8 Channel, 8-Bit ADCs with 1µA Power Down
Low-Power +3V 8-Bit ADCs with Parallel Interface
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Key Features
Applications/Uses
Parametric specs for Precision ADCs (< 5Msps)
| Resolution (bits) (ADC) | 8 |
| # Input Channels | 8 |
| Conv. Rate (ksps) (max) | 400 |
| Data Bus | µP/8 |
| ADC Architecture | Flash |
| Diff/S.E. Input | S.E. Only |
| External VREF (V) (min) | 0 |
| External VREF (V) (max) | 3 |
| Unipolar VIN (V) (max) | 3 |
| INL (±LSB) | 1 |
| Package/Pins | SSOP/28 |
| Budgetary Price (See Notes) | 5.74 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | +3V, 400ksps, 4/8 Channel, 8-Bit ADCs with 1µA Power Down | Aug 01, 1996 |
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Parameters
Parametric specs for Precision ADCs (<u><</u> 5Msps)
| Resolution (bits) (ADC) | 8 |
| # Input Channels | 8 |
| Conv. Rate (ksps) (max) | 400 |
| Data Bus | µP/8 |
| ADC Architecture | Flash |
| Diff/S.E. Input | S.E. Only |
| External VREF (V) (min) | 0 |
| External VREF (V) (max) | 3 |
| Unipolar VIN (V) (max) | 3 |
| INL (±LSB) | 1 |
| Package/Pins | SSOP/28 |
| Budgetary Price (See Notes) | 5.74 |
Key Features
- +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)
Applications/Uses
- Battery-Powered Applications
- Communication Systems
- Portable Equipment
- Remote Data Acquisition
- System-Health Monitoring
Description
The 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.
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.
Technical Docs
| Data Sheet | +3V, 400ksps, 4/8 Channel, 8-Bit ADCs with 1µA Power Down | Aug 01, 1996 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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