MAX1181 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Dual 10-Bit, 80Msps, 3V, Low-Power ADC with Internal Reference and Parallel Outputs

19-2093; Rev 1; 2/07
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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 typi-
cal signal-to-noise ratio (SNR) of 59dB at an input fre-
quency 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 interfac-
ing. 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
Functional Diagram appears at end of data sheet.
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 ±1V_P-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
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1181ECM
-40°C to +85°C
48 TQFP-EP*
MAX1181ECM+
-40°C to +85°C
48 TQFP-EP*
*EP = Exposed paddle.
+Denotes a lead-free package.
Pin Configuration
COM 1
V_DD 2
GND 3
INA+ 4
INA- 5
V_DD 6
GND 7
INB- 8
INB+ 9
GND 10
V_DD 11
CLK 12
MAX1181
EP*
36 D1A
35 D0A
34 OGND
33 OVDD
32 OVDD
31 OGND
30 D0B
29 D1B
28 D2B
27 D3B
26 D4B
25 D5B
48 TQFP-EP
NOTE: THE PIN 1 INDICATOR FOR LEAD-FREE PACKAGES IS REPLACED
BY A "+" SIGN.
________________________________________________________________ Maxim Integrated Products 1
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