Rainbow Electronics MAX1181 - Manual

General Description
The MAX1181 is a +3V, dual 10-bit, analog-to-digital
converter (ADC) featuring fully-differential wideband
track-and-hold (T/H) inputs, driving two pipelined, nine-
stage ADCs. The MAX1181 is optimized for low-power,
high-dynamic performance applications in imaging,
instrumentation, and digital communication applica-
tions. The MAX1181 operates from a single +2.7V to
+3.6V supply, consuming only 246mW, while delivering
a typical signal-to-noise ratio (SNR) of 59dB at an input
frequency of 20MHz and a sampling rate of 80Msps.
The T/H driven input stages incorporate 400MHz (-3dB)
input amplifiers. The converters may also be operated
with single-ended inputs. In addition to low operating
power, the MAX1181 features a 2.8mA sleep mode, as
well as a 1µA power-down mode to conserve power
during idle periods.
An internal +2.048V precision bandgap reference sets
the full-scale range of the ADC. A flexible reference
structure allows the use of the internal or external
reference, if desired for applications requiring
increased accuracy or a different input voltage range.
The MAX1181 features parallel, CMOS-compatible
three-state outputs. The digital output format is set to
two’s complement or straight offset binary through a
single control pin. The device provides for a separate
output power supply of +1.7V to +3.6V for flexible inter-
facing. The MAX1181 is available in a 7mm
✕ 7mm, 48-
pin TQFP package, and is specified for the extended
industrial (-40°C to +85°C) temperature range.
Pin-compatible higher and lower speed versions of the
MAX1181 are also available. Please refer to the
MAX1180 datasheet for 105Msps, the MAX1182
datasheet for 65Msps, the MAX1183 datasheet for
40Msps, and the MAX1184 datasheet for 20Msps. In
addition to these speed grades, this family includes a
20Msps multiplexed output version (MAX1185), for
which digital data is presented time-interleaved on a
single, parallel 10-bit output port.
Applications
High Resolution Imaging
I/Q Channel Digitization
Multichannel IF Undersampling
Instrumentation
Video Application
Features
♦ Single +3V Operation
♦ Excellent Dynamic Performance:
59dB SNR at f IN = 20MHz
73dB SFDR at f IN = 20MHz
♦ Low Power:
82mA (Normal Operation)
2.8mA (Sleep Mode)
1µA (Shutdown Mode)
♦ 0.02dB Gain and 0.25° Phase Matching (typ)
♦ Wide ±1Vp-p Differential Analog Input Voltage
Range
♦ 400MHz, -3dB Input Bandwidth
♦ On-Chip +2.048V Precision Bandgap Reference
♦ User-Selectable Output Format—Two’s
Complement or Offset Binary
♦ 48-Pin TQFP Package with Exposed Pad for
Improved Thermal Dissipation
♦ Evaluation Kit Available
MAX1181
Dual 10-Bit, 80Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs
________________________________________________________________ Maxim Integrated Products 1
D1A
D0A
OGND
OV DD
OV DD
OGND
D0B
D1B
D2B
D3B
D4B
D5B
COM
V DD
GND
INA+
INA-
V DD
GND
INB-
INB+
GND
V DD
CLK
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
48 TQFP-EP
MAX1181
GND V
DD
GND V
DD T/B
SLEEP
PD OE
D9B D8B D7B D6B
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37
REFN REFP REFIN REFOUT D9A D8A D7A D6A D5A D4A D3A D2A
Pin Configuration
Ordering Information
19-2093; Rev 0; 7/01
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.
PART TEMP. RANGE PIN-PACKAGE
MAX1181ECM -40 °C to +85°C 48 TQFP-EP
Functional Diagram appears at end of data sheet.