Smallest, Low-Power, Parallel-Output 12-Bit ADCs
The MAX1295/MAX1297 low-power, 12-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed 12-bit parallel interface. They operate with a single +2.7V to +3.6V analog supply. Power consumption is only 5.4mW at the maximum sampling rate of 265ksps. Two software-selectable power-down modes enable the MAX1295/MAX1297 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can reduce supply current below 10µA at lower sampling rates. Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1295 has six input channels and the MAX1297 has two (three input channels and one input channel, respectively, when in pseudo-differential mode). Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications or for other circuits with demanding power-consumption and space requirements. The MAX1295/MAX1297 tri-states active-low INT when active-low CS goes high. Refer to MAX1265/MAX1267 if tri-stating active-low INT is not desired. The MAX1295 is offered in a 28-pin QSOP package, while the MAX1297 comes in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1294/MAX1296 data sheet.
Key Features
| Applications/Uses
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| title | Download file |
|---|---|
| MAX1295-MAX1297 Data Sheet | MAX1295-MAX1297.pdf |
| Part Number | Resolution (bits) | Input Chan. | Conv. Rate (ksps) | ADC Architecture | Data Bus | Diff/S.E. Input | Internal VREF (V) | External VREF (V) | External VREF (V) | Unipolar VIN (V) | Bipolar VIN (±V) | THD (dB) | INL (±LSB) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ADC | max | nominal | min | max | max | max | See Notes | ||||||||
| MAX1295 | 12 | 6 | 265 | SAR | µP/12 | Both | 2.5 | 1 | 3.6 | 2.5 | 1.25 | -78 | 1 | QSOP/28 | $8.86 @1k |
| MAX1297 | 2 | QSOP/24 | $8.89 @1k | ||||||||||||
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX1295ACEI | No Longer Available | MAX1295ACEI+ | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | No |
| MAX1295ACEI+ | Active | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | Lead Free | |
| MAX1295ACEI+T | Active | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | Lead Free | |
| MAX1295ACEI-T | No Longer Available | MAX1295ACEI+T | QSOP;28 pin | 0°C to +70°C | See data sheet |
| MAX1295AEEI | No Longer Available | MAX1295AEEI+ | QSOP,;28 pin;61.9 mm² | -40°C to +85°C | No |
| MAX1295AEEI+ | Active | QSOP,;28 pin;61.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1295AEEI+T | Active | QSOP,;28 pin;61.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1295AEEI-T | No Longer Available | MAX1295AEEI+T | QSOP;28 pin | -40°C to +85°C | See data sheet |
| MAX1295BCEI | No Longer Available | MAX1295BCEI+ | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | No |
| MAX1295BCEI+ | Active | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX1295BCEI+T | Active | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | Lead Free | |
| MAX1295BCEI-T | No Longer Available | MAX1295BCEI+T | QSOP,;28 pin;61.9 mm² | 0°C to +70°C | No |
| MAX1295BEEI | No Longer Available | MAX1295BEEI+ | QSOP,;28 pin;61.9 mm² | -40°C to +85°C | No |
| MAX1295BEEI+ | Active | QSOP,;28 pin;61.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1295BEEI+T | Active | QSOP,;28 pin;61.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1295BEEI-T | No Longer Available | MAX1295BEEI+T | QSOP;28 pin | -40°C to +85°C | See data sheet |
