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MAX1181 Datasheet

  • MAX1181

  • " Dual 10-Bit, 80Msps, +3V, Low-Power ADC with Internal Refe...

  • 840.32KB

  • Maxim   Maxim

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19-2093; Rev 0; 7/01
Dual 10-Bit, 80Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs
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 1碌A 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鈥檚 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
鉁?/div>
7mm, 48-
pin TQFP package, and is specified for the extended
industrial (-40擄C to +85擄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.
o
Single +3V Operation
o
Excellent Dynamic Performance:
59dB SNR at f
IN
= 20MHz
73dB SFDR at f
IN
= 20MHz
o
Low Power:
82mA (Normal Operation)
2.8mA (Sleep Mode)
1碌A (Shutdown Mode)
o
0.02dB Gain and 0.25擄 Phase Matching (typ)
o
Wide 鹵1Vp-p Differential Analog Input Voltage
Range
o
400MHz, -3dB Input Bandwidth
o
On-Chip +2.048V Precision Bandgap Reference
o
User-Selectable Output Format鈥擳wo鈥檚
Complement or Offset Binary
o
48-Pin TQFP Package with Exposed Pad for
Improved Thermal Dissipation
o
Evaluation Kit Available
Features
MAX1181
Ordering Information
PART
MAX1181ECM
TEMP. RANGE
-40擄C to +85擄C
PIN-PACKAGE
48 TQFP-EP
Pin Configuration
REFN
REFP
REFIN
REFOUT
D9A
D8A
D7A
D6A
D5A
D4A
43
42
41
40
39
48
47
46
45
44
38
COM
V
DD
GND
INA+
INA-
V
DD
GND
INB-
INB+
GND
V
DD
CLK
37
D3A
D2A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
30
29
28
27
26
25
D1A
D0A
OGND
OV
DD
OV
DD
OGND
D0B
D1B
D2B
D3B
D4B
D5B
Applications
High Resolution Imaging
I/Q Channel Digitization
Multichannel IF Undersampling
Instrumentation
Video Application
MAX1181
GND
V
DD
V
DD
GND
T/B
SLEEP
PD
OE
D9B
D8B
Functional Diagram appears at end of data sheet.
48 TQFP-EP
________________________________________________________________
Maxim Integrated Products
D7B
D6B
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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