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MAX1186 Datasheet

  • MAX1186

  • " Dual 10-Bit, 40Msps, 3V, Low-Power ADC with Internal Refer...

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  • Maxim   Maxim

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19-2263; Rev 0; 12/01
Dual 10-Bit, 40Msps, 3V, Low-Power ADC with
Internal Reference and Multiplexed Parallel Outputs
General Description
The MAX1186 is a 3V, dual 10-bit analog-to-digital con-
verter (ADC) featuring fully-differential wideband track-
and-hold (T/H) inputs, driving two pipelined, nine-stage
ADCs. The MAX1186 is optimized for low-power, high
dynamic performance applications in imaging, instru-
mentation, and digital communication applications. This
ADC operates from a single 2.7V to 3.6V supply, con-
suming only 105mW while delivering a typical signal-to-
noise ratio (SNR) of 59.4dB at an input frequency of
20MHz and a sampling rate of 40Msps. Digital outputs
A and B are updated alternating on the rising (CHA)
and the falling (CHB) edge of the clock. The T/H driven
input stages incorporate 400MHz (-3dB) input ampli-
fiers. The converters may also be operated with single-
ended inputs. In addition to low operating power, the
MAX1186 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 ADCs. A flexible reference
structure allows the use of this internal or an externally
derived reference, if desired for applications requiring
increased accuracy or a different input voltage range.
The MAX1186 features parallel, multiplexed, CMOS-
compatible three-state outputs. The digital output for-
mat can be 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 interfacing. The MAX1186 is available in a
7mm x 7mm, 48-pin TQFP-EP package, and is speci-
fied for the extended industrial (-40掳C to +85掳C) tem-
perature range.
Pin-compatible, nonmultiplexed, high-speed versions of
the MAX1186 are also available. Please refer to the
MAX1180 data sheet for 105Msps, the MAX1181 data
sheet for 80Msps, the MAX1182 data sheet for 65Msps,
the MAX1183 data sheet for 40Msps, and the MAX1184
data sheet for 20Msps. For a pin-compatible lower
speed version (20Msps) of the MAX1186, please refer
to the MAX1185 data sheet.
o
Single 3V Operation
o
Excellent Dynamic Performance:
59.4dB SNR at f
IN
= 20MHz
72dBc SFDR at f
IN
= 20MHz
o
Low Power:
35mA (Normal Operation)
2.8mA (Sleep Mode)
1碌A (Shutdown Mode)
o
0.02dB Gain and 0.25掳 Phase Matching
o
Wide 卤1V
P-P
Differential Analog Input Voltage
Range
o
400MHz, -3dB Input Bandwidth
o
On-Chip 2.048V Precision Bandgap Reference
o
Single 10-Bit Bus for Multiplexed, Digital Outputs
o
User-Selectable Output Format鈥揟wo鈥檚
Complement or Offset Binary
o
48-Pin TQFP Package with Exposed Paddle For
Improved Thermal Dissipation
Features
MAX1186
Ordering Information
PART
MAX1186ECM
TEMP RANGE
-40掳C to +85掳C
PIN-PACKAGE
48 TQFP-EP
Functional Diagram appears at end of data sheet.
Pin Configuration
REFN
REFP
REFIN
REFOUT
D9A/B
D8A/B
D7A/B
D6A/B
D5A/B
D4A/B
D3A/B
D2A/B
48
47
46
45
44
43
42
41
40
39
38
COM
V
DD
GND
INA+
INA-
V
DD
GND
INB-
INB+
GND
V
DD
CLK
37
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
D1A/B
D0A/B
OGND
OV
DD
OV
DD
OGND
A/B
N.C.
N.C.
N.C.
N.C.
N.C.
MAX1186
30
29
28
27
26
25
Applications
High-Resolution Imaging
I/Q Channel Digitization
Multichannel IF Sampling
Instrumentation
Video Application
Ultrasound
________________________________________________________________
Maxim Integrated Products
GND
V
DD
V
DD
GND
T/B
SLEEP
PD
OE
N.C.
N.C.
N.C.
N.C.
48 TQFP-EP
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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