Rainbow Electronics MAX19505 - Manual

General Description
The MAX19505 dual-channel, analog-to-digital convert-
er (ADC) provides 8-bit resolution and a maximum sam-
ple rate of 65Msps.
The MAX19505 analog input accepts a wide 0.4V to
1.4V input common-mode voltage range, allowing DC-
coupled inputs for a wide range of RF, IF, and base-
band front-end components. The MAX19505 provides
excellent dynamic performance from baseband to high
input frequencies beyond 400MHz, making the device
ideal for zero-intermediate frequency (ZIF) and high-
intermediate frequency (IF) sampling applications. The
typical signal-to-noise ratio (SNR) performance is
49.8dBFS and typical spurious-free dynamic range
(SFDR) is 69dBc at f
IN = 70MHz and f CLK = 65MHz.
The MAX19505 operates from a 1.8V supply.
Additionally, an integrated, self-sensing voltage regula-
tor allows operation from a 2.5V to 3.3V supply (AVDD).
The digital output drivers operate on an independent
supply voltage (OVDD) over the 1.8V to 3.5V range.
The analog power consumption is only 43mW per chan-
nel at V
AVDD = 1.8V. In addition to low operating
power, the MAX19505 consumes only 1mW in power-
down mode and 15mW in standby mode.
Various adjustments and feature selections are avail-
able through programmable registers that are
accessed through the 3-wire serial-port interface.
Alternatively, the serial-port interface can be disabled,
with the three pins available to select output mode,
data format, and clock-divider mode. Data outputs are
available through a dual parallel CMOS-compatible out-
put data bus that can also be configured as a single
multiplexed parallel CMOS bus.
The MAX19505 is available in a small 7mm x 7mm
48-pin thin QFN package and is specified over the
-40°C to +85°C extended temperature range.
Refer to the MAX19515, MAX19516, and MAX19517
data sheets for pin- and feature-compatible 10-bit,
65Msps, 100Msps, and 130Msps versions, respectively.
Refer to the MAX19506 and MAX19507 data sheets for
pin- and feature-compatible 8-bit, 100Msps and
130Msps versions, respectively.
Applications
IF and Baseband Communications, Including
Cellular Base Stations and Point-to-Point
Microwave Receivers
Ultrasound and Medical Imaging
Portable Instrumentation and Low-Power Data
Acquisition
Digital Set-Top Boxes
Features
♦ Very-Low-Power Operation (43mW/Channel at
65Msps)
♦ 1.8V or 2.5V to 3.3V Analog Supply
♦ Excellent Dynamic Performance
49.8dBFS SNR at 70MHz
69dBc SFDR at 70MHz
♦ User-Programmable Adjustments and Feature
Selection through an SPI™ Interface
♦ Selectable Data Bus (Dual CMOS or Single
Multiplexed CMOS)
♦ DCLK Output and Programmable Data Output
Timing Simplifies High-Speed Digital Interface
♦ Very Wide Input Common-Mode Voltage Range
(0.4V to 1.4V)
♦ Very High Analog Input Bandwidth (> 850MHz)
♦ Single-Ended or Differential Analog Inputs
♦ Single-Ended or Differential Clock Input
♦ Divide-by-One (DIV1), Divide-by-Two (DIV2), and
Divide-by-Four (DIV4) Clock Modes
♦ Two’s Complement, Gray Code, and Offset Binary
Output Data Format
♦ Out-of-Range Indicator (DOR)
♦ CMOS Output Internal Termination Options
(Programmable)
♦ Reversible Bit Order (Programmable)
♦ Data Output Test Patterns
♦ Small, 7mm x 7mm 48-Pin Thin QFN Package with
Exposed Pad
MAX19505
Dual-Channel, 8-Bit, 65Msps ADC
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-4314; Rev 0; 10/08
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.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX19505ETM+ -40°C to +85°C 48 TQFN-EP*
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
Pin Configuration appears at end of data sheet.
SPI is a trademark of Motorola, Inc.