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MAX1197ECM Datasheet

  • MAX1197ECM

  • 雙路、8位、60Msps、3V、低功耗ADC，內(nèi)置電壓基準(zhǔn)及并行輸出

  • 22頁

  • MAXIM   MAXIM

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19-2410; Rev 0; 4/02
Dual, 8-Bit, 40Msps, 3V, Low-Power ADC with
Internal Reference and Parallel Outputs
General Description
The MAX1195 is a 3V, dual, 8-bit analog-to-digital con-
verter (ADC) featuring fully differential wideband track-
and-hold (T/H) inputs, driving two ADCs. The MAX1195
is optimized for low-power, small size, and high-dynamic
performance for applications in imaging, instrumentation
and digital communications. This ADC operates from a
single 2.7V to 3.6V supply, consuming only 87mW while
delivering a typical signal-to-noise and distortion (SINAD)
of 48.5dB at an input frequency of 20MHz and a sam-
pling rate of 40Msps. The T/H-driven input stages incor-
porate 400MHz (-3dB) input amplifiers. The converters
may also be operated with single-ended inputs. In addi-
tion to low operating power, the MAX1195 features a
3mA sleep mode as well as a 0.1碌A(chǔ) 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 this internal or an externally
applied reference, if desired, for applications requiring
increased accuracy or a different input voltage range.
The MAX1195 features parallel, CMOS-compatible three-
state outputs. The digital output format can be set to two鈥檚
complement or straight offset binary through a single con-
trol pin. The device provides for a separate output power
supply of 1.7V to 3.6V for flexible interfacing with various
logic families. The MAX1195 is available in a 7mm x 7mm,
48-pin TQFP package, and is specified for the extended
industrial (-40擄C to +85擄C) temperature range.
Pin-compatible higher speed versions of the MAX1195
are also available. Refer to the MAX1197 data sheet for
60Msps and the MAX1198 data sheet for 100Msps. In
addition to these speed grades, this family will include a
multiplexed output version (MAX1196, 40Msps), for
which digital data is presented time interleaved and on
a single, parallel 8-bit output port.
For a 10-bit, pin-compatible upgrade, refer to the
MAX1183 data sheet. With the N.C. pins of the MAX1195
internally pulled down to ground, this ADC becomes a
drop-in replacement for the MAX1183.
o
Single 2.7V to 3.6V Operation
o
Excellent Dynamic Performance
48.5dB/46.7dB SINAD at f
IN
= 20MHz/200MHz
68.7dBc/55.7dBc SFDR at f
IN
= 20MHz/200MHz
o
-72dB Interchannel Crosstalk at f
IN
= 20MHz
o
Low Power
87mW (Normal Operation)
9mW (Sleep Mode)
0.3碌W (Shutdown Mode)
o
0.05dB Gain and 鹵0.05擄 Phase Matching
o
Wide
鹵1V
P-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
Pin-Compatible 8-Bit and 10-Bit Upgrades
Available
Features
MAX1195
Ordering Information
PART
MAX1195ECM
TEMP RANGE
-40擄C to +85擄C
PIN-PACKAGE
48 TQFP-EP*
*EP
= Exposed paddle
Functional Diagram and Pin Compatible Upgrades table
appear at end of data sheet.
Pin Configuration
REFN
REFP
REFIN
REFOUT
D7A
D6A
D5A
D4A
D3A
D2A
D1A
D0A
48
47
46
45
44
43
42
41
40
39
38
37
Applications
Baseband I/Q Sampling
Multichannel IF Sampling
Ultrasound and Medical
Imaging
Battery-Powered
Instrumentation
WLAN, WWAN, WLL,
MMDS Modems
Set-Top Boxes
VSAT Terminals
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
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
N.C.
N.C.
OGND
OV
DD
OV
DD
OGND
N.C.
N.C.
D0B
D1B
D2B
D3B
MAX1195
30
29
28
27
26
25
________________________________________________________________
Maxim Integrated Products
GND
V
DD
V
DD
GND
T/B
SLEEP
PD
OE
D7B
D6B
D5B
D4B
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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