MAX1290, MAX1292 400ksps、+5V、8/4通道、12位ADC，带有+2.5V电压基准及并行接口

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The MAX1290/MAX1292 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, byte-wide parallel interface. The devices operate with a single +5V analog supply and feature a V_LOGIC pin that allows them to interface directly with a +2.7V to +5.5V digital supply.

Power consumption is only 10mW (V_DD = V_LOGIC) at a 400ksps max sampling rate. Two software-selectable power-down modes enable the MAX1290/MAX1292 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can cut supply current to under 10µA at reduced sampling rates.

Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1290 has eight input channels and the MAX1292 has four input channels (four and two input channels, 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 MAX1290/MAX1292 tri-states active-low INT when active-low CS goes high. Refer to MAX1262/MAX1264 if tri-stating active-low INT is not desired.

The MAX1290 is available in a 28-pin QSOP package, while the MAX1292 comes in a 24-pin QSOP. For pin-compatible +3V, 12-bit versions, refer to the MAX1291/MAX1293 data sheet.

关键特性

应用/使用

12-Bit Resolution, ±0.5 LSB Linearity
+5V Single-Supply Operation
User-Adjustable Logic Level (+2.7V to +5.5V)
Internal +2.5V Reference
Software-Configurable Analog Input Multiplexer
- 8-Channel Single-Ended/
- 4-Channel Pseudo-Differential (MAX1290)
- 4-Channel Single-Ended/
- 2-Channel Pseudo-Differential (MAX1292)
Software-Configurable Unipolar/Bipolar Analog Inputs
Low Current:
- 2.5mA (400ksps)
- 1.0mA (100ksps)
- 400µA (10ksps)
- 2µA (Shutdown)
Internal 6MHz Full-Power Bandwidth Track/Hold
Byte-Wide Parallel (8 + 4) Interface
Small Footprint:
- 28-Pin QSOP (MAX1290)
- 24-Pin QSOP (MAX1292)

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Key Specifications: Precision ADCs (< 5Msps)

Part Number

ADC Resolution (Bits)

Input Channels

Conv. Rate (ksps)

Max. Conv. Time (µs)

Data Bus (Bits)

Ref. (V)

Diff. In

Supply Voltage (V)

Typ. Supply Current (mA)

Typ. Power (mW)

Low Power Mode

Standby Mode

EV-Kit

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX1290

400

1.9

µP/8

Ext
Int +2.5

Yes

1.9

9.5

Yes

QSOP/28

-40 to +85
0 to +70

$5.99 @ 1k

MAX1292

QSOP/24

$5.74 @ 1k

See All Precision ADCs (< 5Msps) (301)

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.