MAXIM INTEGRATED PRODUCTS - MAX1377 MAX1379 MAX1383 Dual, 12-Bit, 1.25 Msps Simultaneous-Sampling ADCs with Serial Interface

19-4126; Rev 0; 7/08

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling

ADCs with Serial Interface

General Description Features

The MAX1377/MAX1379/MAX1383 feature two simulta- Dual, Simultaneous-Sampling, 12-Bit Successive neous-sampling, low-power, 12-bit ADCs with serial Approximation Register (SAR) ADCs

interface and internal voltage reference. Fast sampling 2 x 2 Mux Inputs or Two Differential Inputs rate, low power dissipation, and excellent dynamic per-

1.25Msps Sampling Rate per ADC

formance make the MAX1377/MAX1379/MAX1383

Internal or External Reference

ideal for industrial process control, motor control, and

Excellent Dynamic Performance

RF applications.

70d B SINAD (MAX1377)

Conversion results are available through a SPI™-/ 71d B SINAD (MAX1379/MAX1383) QSPI™-/MICROWIRE™-/DSP-compatible interface with 84d Bc/SFDR independent serial digital outputs for each channel. The 1MHz Full-Linear Bandwidth serial outputs allow twice as much data to be transferred

2.7V to 3.6V Low-Power Operation (MAX1377)

at the given clock rate. The conversion results for both 50m W (Normal Operation) ADCs can also be output on a single digital output for 6m W (Partial Power-Down)

microcontrollers (µCs) and DSPs with only a single serial 3µW (Full Power-Down)

input available. 4.75V to 5.25V Low-Power Operation (MAX1379)

90m W (Normal Operation)

The MAX1377 operates from a 2.7V to 3.6V analog sup-

10m W (Partial Power-Down)

ply and the MAX1379/MAX1383 operate from a 4.75V

5µW (Full Power-Down)

to 5.25V analog supply. A separate 1.8V to AVDD digi-

20MHz, SPI-Compatible, 3-Wire Serial Interface

tal supply allows interfacing to low voltage logic without

User-Selectable Single (0.625Msps max) or Dual

the use of level translators.

Outputs (1.25Msps max)

Two power-down modes, partial and full, allow the

Input Range: ±10V (MAX1383), 0–VREF or

MAX1377/MAX1379 and MAX1383 (full power-down only)

±VREF/2 (MAX1377/MAX1379)

to save power between conversions. Partial power-down RE FS EL CS

Small 20-Pin TQFN Package

mode reduces the supply current to 2m A while leaving

RE CN VS

the reference enabled for quick power-up. Full power- Ordering Information

RG ND SC LK

down mode reduces the supply current to 1µA.

PART TEMP RANGE PIN-PACKAGE

The MAX1377/MAX1379 inputs accept voltages AG ND DO UT

MAX1377ATP+ -40°C to +125°C 20 TQFN-EP*

between zero and the reference voltage or ±VREF/2.

AV DD DO UT

The MAX1383 offers an input voltage range of ±10V, MAX1379ATP+ -40°C to +125°C 20 TQFN-EP*

which is ideal for industrial and motor-control applica- MAX1383ATP+** -40°C to +125°C 20 TQFN-EP* tions. The input to each of the ADCs supports either a

+Denotes a lead-free/Ro HS-compliant package.

true-differential input or two single-ended inputs.

*EP = Exposed pad. **Future product—contact factory for availability.

The MAX1377/MAX1379/MAX1383 are available in a 20-pin TQFN package, and are specified for the automo- Pin Configuration tive (-40°C to +125°C) temperature range.

TOP VIEW

Applications

Motor Control Communications VLS/D Data Acquisition SEL DGND

MAX1377

Bill Validation AGND U/B

MAX1379 MAX1383

Portable Instruments AIN1B AIN2B

(EXPOSED PAD)*

AIN1A AIN2A

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp. *CONNECT PAD TO AGND

Maxim Integrated Products

For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.