Rainbow Electronics MAX1126 - Manual

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 IN = 5.3MHz
93.7dBc SFDR at f IN = 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 1
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 DD
38 OUT2N
39 OUT2P
40 OV DD
41 FRAMEN
42 FRAMEP
43 OV DD
44 CLKOUTN
45 CLKOUTP
46 OV DD
47 OUT1N
48 OUT1P
49 OV DD
50 OUT0N
51 OUT0P
52
OV
DD
53
PD0
54
PD1
55
PD2
56
PD3
57
PDALL
58
AV
DD
59
AV
DD
60
AV
DD
61
AV
DD
62
AV
DD
63 64
LVDSTEST
65
GND
66
REFIO
67 68
GND
1 GND
2 IN0P
3 IN0N
4 GND
5 IN1P
6 IN1N
7 GND
8 AV DD
9 AV DD
10 AV DD
11 GND
12 IN2P
13 IN2N
14 GND
15 IN3P
16 IN3N
17 GND
18
AV
DD
19
I.C.
20
AV
DD
21
CV
DD
22
GND
23
CLK
24
GND
25
AV
DD
26
AV
DD
27
AV
DD
28
DT
29 30
PLL0
31
PLL1
32
PLL2
33
PLL3
34
OV
DD
SL
VS/L
VDS
INTREF T/B
MAX1126
QFN
10mm x 10mm x 0.9mm
EP
Pin Configuration