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MAX1284, MAX1285, MAX1285B
400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference
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Status
Active: In Production.
Description
The MAX1284/MAX1285 12-bit analog-to-digital converters (ADCs) combine a high-bandwidth track/hold (T/H), a serial interface with high conversion speed, an internal +2.5V reference, and low power consumption. The MAX1284 operates from a single +4.5V to +5.5V supply; the MAX1285 operates from a single +2.7V to +3.6V supply.
The 3-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The devices use an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
Low power, ease of use, and small package size make these converters ideal for remote-sensor and data-acquisition applications or for other circuits with demanding power consumption and space requirements. The MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed versions of the MAX1240/MAX1241; for more information, refer to the respective data sheets.
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Data Sheet
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An evaluation kit is available: MAX1284EVC16, MAX1284EVKIT
Key Features
- Single-Supply Operation
- +4.5V to +5.5V (MAX1284)
- +2.7V to +3.6V (MAX1285)
- ±1 LSB (max) DNL, ±1 LSB (max) INL
- 400ksps Sampling Rate (MAX1284)
- Internal Track/Hold
- Internal +2.5V Reference
- Low Power: 2.5mA (400ksps)
- SPI/QSPI/MICROWIRE 3-Wire Serial Interface
- Pin-Compatible, High-Speed Upgrades to MAX1240/MAX1241
- 8-Pin SO Package
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Applications/Uses
- Battery-Powered Applications
- Data Acquisition
- Medical Instruments
- Pen Digitizers
- Portable Data Logging
- Process Control
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Key Specifications:
| Precision ADCs (< 5Msps) |
| Part Number |
Resolution
(bits) |
Input Chan. |
Conv. Rate
(ksps) |
Data Bus
(bits) |
Diff/S.E. Input |
Internal VREF
(V) |
Unipolar VIN
(V) |
SINAD
(dB) |
THD
(dB) |
SFDR
(dB) |
DNL
(±LSB) |
INL
(±LSB) |
Package/Pins |
Budgetary Price |
| ADC |
max |
nominal |
max |
See Notes |
| MAX1284 |
12 |
1 |
400 |
SPI |
S.E. Only |
2.5 |
2.5 |
70 |
-80 |
80 |
1 |
1 |
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$7.45 @1k |
| MAX1285 |
300 |
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$7.45 @1k |
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See All Precision ADCs (< 5Msps) (417)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
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Information Index
Document Ref.: 19-1687
Rev 2;
2011-01-18
This page last modified: 2011-01-18
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