Rainbow Electronics MAX1126 User Manual

General description, Applications, Features

General Description

The MAX1126 quad, 12-bit analog-to-digital converter
(ADC) features fully differential inputs, a pipelined
architecture, and digital error correction. This ADC is
optimized for low-power, high-dynamic performance for
medical imaging, communications, and instrumentation
applications. The MAX1126 operates from a 1.7V to
1.9V single supply and consumes only 563mW while
delivering a 69.9dB signal-to-noise ratio (SNR) at a
5.3MHz input frequency. In addition to low operating
power, the MAX1126 features an 813µA power-down
mode for idle periods.

An internal 1.24V precision bandgap reference sets the
ADC’s full-scale range. A flexible reference structure
allows the use of an external reference for applications
requiring increased accuracy or a different input volt-
age range.

A single-ended clock controls the conversion process.
An internal duty-cycle equalizer allows for wide varia-
tions in input-clock duty cycle. An on-chip phase-
locked loop (PLL) generates the high-speed serial
low-voltage differential signaling (LVDS) clock.

The MAX1126 provides serial LVDS outputs for data,
clock, and frame alignment signals. The output data is
presented in two’s complement or binary format.

Refer to the MAX1127 data sheet for a pin-compatible
65Msps version of the MAX1126.

The MAX1126 is available in a small, 10mm x 10mm x
0.9mm, 68-pin QFN package with exposed paddle and
is specified for the extended industrial (-40°C to +85°C)
temperature range.

Applications

Ultrasound and Medical Imaging

Positron Emission Tomography (PET) Imaging

Multichannel Communication Systems

Instrumentation

Features

♦ Four ADC Channels with Serial LVDS/SLVS

Outputs

♦ Excellent Dynamic Performance

69.9dB SNR at f

= 5.3MHz

93.7dBc SFDR at f

= 5.3MHz

-90dB Channel Isolation

♦ Ultra-Low Power

135mW per Channel (Normal Operation)
1.5mW Total (Shutdown Mode)

♦ Accepts 20% to 80% Clock Duty Cycle
♦ Self-Aligning Data-Clock to Data-Output Interface
♦ Fully Differential Analog Inputs
♦ Wide ±1.4V

P-P

Differential Input Voltage Range

♦ Internal/External Reference Option
♦ Test Mode for Digital Signal Integrity
♦ LVDS Outputs Support Up to 30in FR-4 Backplane

Connections

♦ Small, 68-Pin QFN with Exposed Paddle
♦ Evaluation Kit Available (MAX1127EVKIT)

MAX1126

Quad, 12-Bit, 40Msps, 1.8V ADC with

Serial LVDS Outputs

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-3143; Rev 0; 1/04

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

EVALUATION KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX1126EGK

-40°C to +85°C

68 QFN 10mm x
x 10mm x 0.9mm

35 OUT3N

36 OUT3P

37 OV

38 OUT2N

39 OUT2P

40 OV

41 FRAMEN

42 FRAMEP

43 OV

44 CLKOUTN

45 CLKOUTP

46 OV

47 OUT1N

48 OUT1P

49 OV

50 OUT0N

51 OUT0P

PD0

PD1

PD2

PD3

PDALL

LVDSTEST

GND

REFIO

GND

IN0P

IN0N

GND

IN1P

IN1N

GND

IN2P

IN2N

GND

IN3P

IN3N

GND

I.C.

GND

CLK

GND

PLL0

PLL1

PLL2

PLL3

VS/L

VDS

INTREF

T/B

MAX1126

QFN

10mm x 10mm x 0.9mm

Pin Configuration