General Description
The MAX1183 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 MAX1183 is optimized for low-power,
high dynamic performance applications in imaging,
instrumentation, and digital communication applica-
tions. This ADC operates from a single +2.7V to +3.6V
supply, consuming only 120mW while delivering a typi-
cal signal-to-noise ratio (SNR) of 59.6dB at an input fre-
quency of 20MHz and a sampling rate of 40Msps. 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 MAX1183 features a 2.8mA sleep mode as
well as a 1A 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
derived reference, if desired for applications requiring
increased accuracy or a different input voltage range.
The MAX1183 features parallel, CMOS-compatible
three-state outputs. The digital output format can be 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 MAX1183 is available in a 7mm
7mm, 48-
pin TQFP package, and is specified for the extended
industrial (-40C to +85C) temperature range.
Pin-compatible lower and higher speed versions of the
MAX1183 are also available. Refer to the MAX1180
data sheet for 105Msps, the MAX1181 data sheet for
80Msps, the MAX1182 data sheet for 65Msps, and the
MAX1184 data sheet for 20Msps. In addition to these
speed grades, this family includes a multiplexed output
version, for which digital data is presented time-inter-
leaved and on a single, parallel 10-bit output port.
Applications
High-Resolution Imaging
I/Q Channel Digitization
Multichannel IF Sampling
Instrumentation
Video Application
Ultrasound
Features
o Single +3V Operation
o Excellent Dynamic Performance
59.6dB SNR at f
IN
= 20MHz
73dB SFDR at f
IN
= 20MHz
o Low Power
40mA (Normal Operation)
2.8mA (Sleep Mode)
1A (Shutdown Mode)
o 0.02dB Gain and 0.25 Phase Matching
o Wide 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--Two's
Complement or Offset Binary
o 48-Pin TQFP Package with Exposed Paddle for
Improved Thermal Dissipation
MAX1183
Dual 10-Bit, 40Msps, +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
MAX1183
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
19-2173; Rev 0; 9/01
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.
Functional Diagram appears at end of data sheet.
PART
TEMP. RANGE
PIN-PACKAGE
MAX1183ECM
-40
C to +85C
48 TQFP-EP
MAX1183
Dual 10-Bit, 40Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +3V, OV
DD
= +2.5V, 0.1F and 1.0F capacitors from REFP, REFN, and COM to GND, REFOUT connected to REFIN through
a 10k
resistor, V
IN
= 2Vp-p (differential with respect to COM), C
L
= 10pF at digital outputs (Note 5), f
CLK
= 40MHz, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
, OV
DD
to GND .............................................. -0.3V to +3.6V
OGND to GND.......................................................-0.3V to +0.3V
INA+, INA-, INB+, INB- to GND ...............................-0.3V to V
DD
REFIN, REFOUT, REFP, REFN,
COM, CLK to GND .................................-0.3V to (V
DD
+ 0.3V)
OE, PD, SLEEP, T/B
D9AD0A, D9BD0B to OGND ...........-0.3V to (OV
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70C)
48-Pin TQFP (derate 12.5mW/C above +70C)........1000mW
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-60C to +150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
Resolution
10
Bits
Integral Nonlinearity
INL
f
IN
= 7.51MHz
0.5
1.5
LSB
Differential Nonlinearity
DNL
f
IN
= 7.51MHz, no missing codes guaranteed
0.25
1.0
LSB
Offset Error
<1
1.7
% FS
Gain Error
0
2
% FS
ANALOG INPUT
Differential Input Voltage Range
V
DIFF
Differential or single-ended inputs
1.0
V
Common-Mode Input Voltage
Range
V
CM
V
DD
/2
0.5
V
Input Resistance
R
IN
Switched capacitor load
50
k
Input Capacitance
C
IN
5
pF
CONVERSION RATE
Maximum Clock Frequency
f
CLK
40
MHz
Data Latency
5
Clock
Cycles
DYNAMIC CHARACTERISTICS (f
CLK
= 40MHz, 4096-point FFT)
f
INA or B
= 7.51MHz, T
A
= +25C
57.3
59.6
Signal-to-Noise Ratio
SNR
f
INA or B
= 20MHz, T
A
= +25C
56.8
59.6
dB
f
INA or B
= 7.51MHz, T
A
= +25C
57
59.4
Signal-to-Noise and Distortion
SINAD
f
INA or B
= 20MHz, T
A
= +25C
56.5
59
dB
f
INA or B
= 7.51MHz, T
A
= +25C
65
76
Spurious-Free Dynamic Range
SFDR
f
INA or B
= 20MHz, T
A
= +25C
65
73
dBc
f
INA or B
= 7.51MHz
-76
Third-Harmonic Distortion
HD3
f
INA or B
= 20MHz
-73
dB
Intermodulation Distortion
IMD
f
INA or B
= 11.6066MHz at -6.5dB FS,
f
INA or B
= 13.3839MHz at -6.5dB FS
(Note 2)
-78
dBc
f
INA or B
= 7.51MHz, T
A
= +25C
-73
-64
Total Harmonic Distortion
(First 4 Harmonics)
THD
f
INA or B
= 20MHz, T
A
= +25C
-73
-63
dBc
MAX1183
Dual 10-Bit, 40Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +3V, OV
DD
= +2.5V, 0.1F and 1.0F capacitors from REFP, REFN, and COM to GND, REFOUT connected to REFIN through
a 10k
resistor, V
IN
= 2Vp-p (differential with respect to COM), C
L
= 10pF at digital outputs (Note 5), f
CLK
= 40MHz, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Small-Signal Bandwidth
Input at -20dB FS, differential inputs
500
MHz
Full-Power Bandwidth
FPBW
Input at -0.5dB FS, differential inputs
400
MHz
Aperture Delay
t
AD
1
ns
Aperture Jitter
t
AJ
2
ps
RMS
Overdrive Recovery Time
For 1.5 x full-scale input
2
ns
Differential Gain
1
%
Differential Phase
0.25
Degrees
Output Noise
INA+ = INA- = INB+ = INB- = COM
0.2
LSB
RMS
INTERNAL REFERENCE
Reference Output Voltage
REFOUT
2.048
3%
V
Reference Temperature
Coefficient
TC
REF
60
ppm/
C
Load Regulation
1.25
mV/mA
BUFFERED EXTERNAL REFERENCE (V
REFIN
= +2.048V)
REFIN Input Voltage
V
REFIN
2.048
V
Positive Reference Output
Voltage
V
REFP
2.012
V
Negative Reference Output
Voltage
V
REFN
0.988
V
Differential Reference Output
Voltage Range
V
REF
V
REF
= V
REFP
- V
REFN
0.98
1.024
1.07
V
REFIN Resistance
R
REFIN
>50
M
Maximum REFP, COM
Source Current
I
SOURCE
5
mA
Maximum REFP, COM
Sink Current
I
SINK
-250
A
Maximum REFN Source Current
I
SOURCE
250
A
Maximum REFN Sink Current
I
SINK
-5
mA
UNBUFFERED EXTERNAL REFERENCE (V
REFIN
= AGND, reference voltage applied to REFP, REFN, and COM)
REFP, REFN Input Resistance
R
REFP
,
R
REFN
Measured between REFP and COM and
REFN and COM
4
k
Differential Reference Input
Voltage Range
V
REF
V
REF
= V
REFP
- V
REFN
1.024
10%
V
COM Input Voltage Range
V
COM
V
DD
/2
10%
V
REFP Input Voltage
V
REFP
V
COM
+
V
REF
/2
V
REFN Input Voltage
V
REFN
V
COM
-
V
REF
/2
V
MAX1183
Dual 10-Bit, 40Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +3V, OV
DD
= +2.5V, 0.1F and 1.0F capacitors from REFP, REFN, and COM to GND, REFOUT connected to REFIN through
a 10k
resistor, V
IN
= 2Vp-p (differential with respect to COM), C
L
= 10pF at digital outputs (Note 5), f
CLK
= 40MHz, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS (CLK, PD, OE, SLEEP, T/B)
CLK
0.8 x
V
DD
Input High Threshold
V
IH
PD, OE, SLEEP, T/B
0.8 x
OV
DD
V
CLK
0.2 x
V
DD
Input Low Threshold
V
IL
PD, OE, SLEEP, T/B
0.2 x
OV
DD
V
Input Hysteresis
V
HYST
0.1
V
I
IH
V
IH
= OV
DD
or V
DD
(CLK)
5
Input Leakage
I
IL
V
IL
= 0
5
A
Input Capacitance
C
IN
5
pF
DIGITAL OUTPUTS (D9AD0A, D9BD0B)
Output Voltage Low
V
OL
I
SINK
= -200A
0.2
V
Output Voltage High
V
OH
I
SOURCE
= 200A
OV
DD
- 0.2
V
Three-State Leakage Current
I
LEAK
OE = OV
DD
10
A
Three-State Leakage
Capacitance
C
OUT
OE = OV
DD
5
pF
POWER REQUIREMENTS
Analog Supply Voltage Range
V
DD
2.7
3
3.6
V
Output Supply Voltage Range
OV
DD
1.7
2.5
3.6
V
Operating, f
INA or B
= 20MHz at -0.5dB FS
40
60
Sleep mode
2.8
mA
Analog Supply Current
I
VDD
Shutdown, clock idle, PD = OE = OV
DD
1
15
A
Operating, C
L
= 15pF,
f
INA or B
= 20MHz at -0.5dB FS
5.8
mA
Sleep mode
100
Output Supply Current
I
OVDD
Shutdown, clock idle, PD = OE = OV
DD
2
10
A
Operating, f
INA or B
= 20MHz at -0.5dB FS
120
180
Sleep mode
8.4
mW
Power Dissipation
PDISS
Shutdown, clock idle, PD = OE = OV
DD
3
45
W
Offset
0.2
mV/V
Power-Supply Rejection
PSRR
Gain
0.1
%V
TIMING CHARACTERISTICS
CLK Rise to Output Data Valid
t
DO
Figure 3 (Note 3)
5
8
ns
Output Enable Time
t
ENABLE
Figure 4
10
ns
Output Disable Time
t
DISABLE
Figure 4
1.5
ns
MAX1183
Dual 10-Bit, 40Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +3V, OV
DD
= +2.5V, 0.1F and 1.0F capacitors from REFP, REFN, and COM to GND, REFOUT connected to REFIN through
a 10k
resistor, V
IN
= 2Vp-p (differential with respect to COM), C
L
= 10pF at digital outputs (Note 5), f
CLK
= 40MHz, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLK Pulse Width High
t
CH
Figure 3, clock period: 25ns
12.5
3.8
ns
CLK Pulse Width Low
t
CL
Figure 3, clock period: 25ns
12.5
3.8
ns
Wake up from sleep mode (Note 4)
0.41
Wake-Up Time
t
WAKE
Wake up from shutdown (Note 4)
1.5
s
CHANNEL-TO-CHANNEL MATCHING
Crosstalk
f
INA or B
= 20MHz at -0.5dB FS
-70
dB
Gain Matching
f
INA or B
= 20MHz at -0.5dB FS
0.02
0.2
dB
Phase Matching
f
INA or B
= 20MHz at -0.5dB FS
0.25
Degrees
Note 1: SNR, SINAD, THD, SFDR, and HD3 are based on an analog input voltage of -0.5dB FS referenced to a +1.024V full-scale
input voltage range.
Note 2: Intermodulation distortion is the total power of the intermodulation products relative to the individual carrier. This number is
6dB better, if referenced to the two-tone envelope.
Note 3: Digital outputs settle to V
IH
, V
IL
. Parameter guaranteed by design.
Note 4: With REFIN driven externally, REFP, COM, and REFN are left floating while powered down.
Note 5: Equivalent dynamic performance is obtainable over full OV
DD
range with reduced C
L
.
Typical Operating Characteristics
(V
DD
= +3V, OV
DD
= +2.5V, V
REFIN
= +2.048V, differential input at -0.5dB FS, f
CLK
= 40.0006MHz, C
L
10pF, T
A
= +25C, unless
otherwise noted.)
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
0
4
6
8
2
10 12 14
18
16
20
FFT PLOT CHA (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
MAX1183 toc01
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
CHA
f
CLK
= 40.0005678MHz
f
INA
= 7.5342866MHz
f
INB
= 6.1475482MHz
AINA = -0.498dB FS
HD3
HD2
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
0
4
6
8
2
10 12 14
18
16
20
FFT PLOT CHB (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
MAX1183 toc02
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
CHB
f
CLK
= 40.0005678MHz
f
INB
= 6.1475482MHz
f
INA
= 7.524866MHz
AINB = -0.534dB FS
HD3
HD2
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
0
4
6
8
2
10 12 14
18
16
20
FFT PLOT CHA (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
MAX1183 toc03
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
CHA
f
CLK
= 40.0005678MHz
f
INA
= 24.9661747MHz
f
INB
= 19.8879776MHz
AINA = -0.552dB FS
HD3
HD2
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