MAX125, MAX126 2x4-Channel, Simultaneous-Sampling, 14-Bit DAS

Description

The MAX125/MAX126 are high-speed, multichannel, 14-bit data-acquisition systems (DAS) with simultaneous track/holds (T/Hs). These devices contain a 14-bit, 3µs, successive-approximation analog-to-digital converter (ADC), a +2.5V reference, a buffered reference input, and a bank of four simultaneous-sampling T/H amplifiers that preserve the relative phase information of the sampled inputs. The MAX125/MAX126 have two multiplexed inputs for each T/H, allowing a total of eight inputs. In addition, the converter is overvoltage tolerant to ±17V; a fault condition on any channel will not harm the IC. Available input ranges are ±5V (MAX125) and ±2.5V (MAX126).

An on-board sequencer converts one to four channels per active-low CONVST pulse. In the default mode, one T/H output (CH1A) is converted. An interrupt signal (active-low INT) is provided after the last conversion is complete. Convert two, three, or four channels by reprogramming the MAX125/MAX126 through the bidirectional parallel interface. Once programmed, the MAX125/MAX126 continue to convert the specified number of channels per active-low CONVST pulse until they are reprogrammed. The channels are converted sequentially, beginning with CH1. The INT signal always follows the end of the last conversion in a conversion sequence. The ADC converts each assigned channel in 3µs and stores the result in an internal 14x4 RAM. Upon completion of the conversions, data can be accessed by applying successive pulses to the active-low RD pin. Four successive reads access four data words sequentially.

The parallel interface's data-access and bus-release timing specifications are compatible with most popular digital signal processors and 16-bit/32-bit microprocessors, so the MAX125/MAX126 conversion results can be accessed without resorting to wait states.

Key Features

Applications/Uses

Four Simultaneous-Sampling T/H Amplifiers with Two Multiplexed Inputs (eight single-ended inputs total)
3µs Conversion Time per Channel
Throughput:
- 250ksps (1 channel)
- 142ksps (2 channels)
- 100ksps (3 channels)
- 76ksps (4 channels)
Input Range:
- ±5V (MAX125)
- ±2.5V (MAX126)
Fault-Protected Input Multiplexer (±17V)
±5V Supplies
Internal +2.5V or External Reference Operation
Programmable On-Board Sequencer
High-Speed Parallel DSP Interface

	Digital Signal Processing (DSP)
	Multiphase Motor Control
	Power-Factor Monitoring
	Power-Grid Synchronization
	Vibration and Waveform Analysis

Key Specifications: Precision ADCs (< 5Msps)

Part Number

ADC Resolution (Bits)

Input Channels

Conv. Rate (ksps)

Max. Conv. Time (µs)

Data Bus (Bits)

Ref. (V)

Input Range (V)

Diff. In

Supply Voltage (V)

Typ. Supply Current (mA)

Typ. Power (mW)

Standby Mode

Package

Price^**

MAX125

250

µP/14

Ext
Int +2.5

±5

165

Yes

SSOP/36

$13.42 @ 1k

MAX126

±2.5

$13.42 @ 1k

See All Precision ADCs (< 5Msps) (307)

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.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-40 of 40

MAX125

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX125CC/D+

See data sheet

MAX125EVB16

See data sheet

MAX125CC/D

DICE SALES;

Use pkgcode/variation: DICE*

See data sheet

MAX125CCAX+D

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX125CCAX+TD

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX125CEAX+D

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX125CEAX+TD

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX125CCAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX125CCAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX125CEAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX125CEAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX126

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX126CC/D+

See data sheet

MAX126BC/D+

See data sheet

MAX126EVB16

See data sheet

MAX126BCAX+

0°C to +70°C

See data sheet

MAX126ACAX+

0°C to +70°C

See data sheet

MAX126BEAX+

-40°C to +85°C

See data sheet

MAX126AEAX+

-40°C to +85°C

See data sheet

MAX126CC/D

DICE SALES;

Use pkgcode/variation: DICE*

See data sheet

MAX126BC/D

DICE SALES;

Use pkgcode/variation: DICE*

See data sheet

MAX126CCAX+D

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX126CCAX+TD

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX126CEAX+D

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX126CEAX+TD

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX126ACAX+T

0°C to +70°C

See data sheet

MAX126CCAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX126BCAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX126BCAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX126BCAX+T

0°C to +70°C

See data sheet

MAX126CCAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX126ACAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX126ACAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX126CEAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX126AEAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX126AEAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX126CEAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX126BEAX+T

-40°C to +85°C

See data sheet

MAX126BEAX

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX126AEAX+T

-40°C to +85°C

See data sheet

MAX126BEAX-T

SSOP;36 pin;
Dwg: 21-0040 (PDF)
Use pkgcode/variation: A36-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis