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MAX1426EAI+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
General Description
The MAX1426 10-bit, monolithic analog-to-digital con-
verter (ADC) is capable of a 10Msps sampling rate. This
device features an internal track-and-hold (T/H) amplifier
for excellent dynamic performance; at the same time, it
minimizes the number of external components. Low
input capacitance of only 8pF minimizes input drive
requirements. A wide input bandwidth (up to 150MHz)
makes this device suitable for digital RF/IF downconvert-
er applications employing undersampling techniques.
The MAX1426 employs a differential pipelined architec-
ture with a wideband T/H amplifier to maximize through-
put while limiting power consumption to only 156mW.
The MAX1426 generates an internal +2.5V reference
that supplies three additional reference voltages
(+3.25V, +2.25V, and +1.25V). These reference volt-
ages provide a differential input range of +2V to -2V.
The analog inputs are biased internally to correct the
DC level, eliminating the need for external biasing on
AC-coupled applications.
A separate +3V digital logic supply input allows for
separation of digital and analog circuitry. The output
data is in two’s complement format. The MAX1426 is
available in the space-saving 28-pin SSOP package.
For a pin-compatible version at a higher data rate, refer
to the MAX1424 or MAX1425
Applications
Medical Ultrasound Imaging
CCD Pixel Processing
IR Focal Plane Array
Radar
IF and Baseband Digitization
Set-Top Boxes
Features
o Differential Inputs for High Common-Mode
Noise Rejection
o 61dB Signal-to-Noise Ratio (at f
IN
= 2MHz)
o Internal +2.5V Reference
o 150MHz Input Bandwidth
o Wide ±2V Input Range
o Low Power Consumption: 156mW
o Separate Digital Supply Input for 3V Logic
Compatibility
o Single +5V Operation Possible
MAX1426
10-Bit, 10Msps ADC
________________________________________________________________
Maxim Integrated Products
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D0
D1
D2
D3
D4
DGND
D9
DV
DD
DGND
DV
DD
D5
D6
D7
D8
OE/PD
CLK
CMLN
CMLP
INN
INP
AV
DD
AGND
CML
REFN
REFIN
REFP
AV
DD
AGND
SSOP
TOP VIEW
MAX1426
+
CLK
INP
INTERFACE
PIPELINE ADC
REF SYSTEM +
BIAS
OUTPUT
DRIVERS
REF
REFIN REFP CML REFN OE/PD
AV
DD
AGND
DV
DD
DGND
D9–D0
INN
T/H
MAX1426
Functional Diagram
19-1598 Rev 1; 7/11
PART
MAX1426CAI+
MAX1426EAI+ -40°C to +85°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
28 SSOP
28 SSOP
Pin Configuration
Ordering Information
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Devices are also available in a tape-and-reel package.
Specify tape and reel by adding “T” to the number when order-
ing.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX1426
10-Bit, 10Msps ADC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
AV
DD
= V
CMLP
= +5V, V
DV
DD
= +3.3V, V
CMLN
= V
AGND
= V
DGND
= 0V, internal reference, digital output loading 35pF, f
CLK
=
10MHz (50% duty cycle), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
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.
AV
DD
to AGND ........................................................ -0.3V to +6V
DV
DD
to DGND ....................................................... -0.3V to +6V
AV
DD
to DGND........................................................ -0.3V to +6V
DGND to AGND ................................................................. ±0.3V
REFP, REFIN, REFN, CMLN, CMLP,
CML, INP, INN .....................(V
AGND
- 0.3V) to (V
AV
DD
+ 0.3V)
CLK, OE/PD, D0–D9 ...............(V
DGND
- 0.3V) to (V
DV
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
28-Pin SSOP (derated 9.5mW/°C above +70°C) .........762mW
Operating Temperature Ranges
MAX1426CAI ..................................................... 0°C to +70°C
MAX1426EAI................................................... -40°C to +85°C
Maximum Junction Temperature .................................... +150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
58 60
f = 2MHz
-70 -67
f = 2MHz
%FSR
%FSR
f = 2MHz
(Note 4)
External reference (REFP, CML, REFN)
(Note 3)
External reference (REFIN) (Note 2)
Guaranteed monotonic
(Note 1)
Internal reference (Note 1)
f = 2MHz
CONDITIONS
SINADSignal-to-Noise and Distortion
dBTHD
Total Harmonic Distortion
(first five harmonics)
dB
69 72
SFDRSpurious-Free Dynamic Range
dB
60 61
SNRSignal-to-Noise Ratio
LSB
-1 1
DNLDifferential Nonlinearity
Bits
10
RESResolution
mV/V
-5 ±2 +5
PSRRPower-Supply Rejection Ratio
-5 ±3 5
-5 ±2 5
LSB
-1.5 ±0.3 1.5
INLIntegral Nonlinearity
No Missing Codes
-3 ±1.0 3
MSOMidscale Offset
-10 ±5 10
GEGain Error
UNITSMIN TYP MAXSYMBOLPARAMETER
dB
ACCURACY
DYNAMIC PERFORMANCE (A
IN
= -1.0dBFS)
MAX1426
10-Bit, 10Msps ADC
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
AV
DD
= V
CMLP
= +5V, V
DV
DD
= +3.3V, V
CMLN
= V
AGND
= V
DGND
= 0V, internal reference, digital output loading 35pF, f
CLK
=
10MHz (50% duty cycle), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
f = 2MHz
CONDITIONS
Bits
9.3 9.7
ENOBEffective Number of Bits
UNITSMIN TYP MAXSYMBOL PARAMETER
f1 = 1.98MHz, f2 = 2.00MHz
(-7dB FS, each tone) (Note 5)
dBc
-70
IMDIntermodulation Distortion
(Note 7)
(Note 7)
V
INP
- V
INN
CML (Note 6)
Either input to ground
Either input to ground
MHz150LSBWLarge-Signal Bandwidth
MHz400SSBWSmall-Signal Bandwidth
V±2DRDifferential Input Range
V
2.25
±10%
V
CMVR
Input Common-Mode Voltage
Range
pF
8
C
IN
Input Capacitance
kΩ
3.5
R
IN
Input Resistance
REFP, CML, REFN
REFP, CML, REFN
V
REFP
- V
REFN
REFIN
REFIN (Note 8)
V
1.25
±10%
REFN Input Range
V
2.25
±10%
CML Input Range
V
3.25
±10%
REFP Input Range
pF
15
C
IN
Input Capacitance
µA
-325 +325
I
IN
Input Current
V
2.0
Differential Reference
pF
10
C
IN
Input Capacitance
kΩ
6.5
R
IN
Input Resistance
V
REFP
- V
REFN,
T
A
= +25°C V
1.9 2.0 2.1
Differential Reference
V
1.25
V
REFN
Negative Reference Input
Voltage
V
2.25
V
CML
Common-Mode Reference
Voltage
V
3.25
V
REFP
Positive Reference Voltage
ppm/°C±50
Differential Reference
Temperature Coefficient
REFERENCE OUTPUTS (REFP, CML, REFN; external +2.5V reference)
REFERENCE (V
REFIN
= 0; REFP, REFN, CML applied externally)
ANALOG INPUT (INP, INN, CML)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX1426EAI+

Mfr. #:
Buy MAX1426EAI+
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 10-Bit 10Msps High Speed ADC
Lifecycle:
New from this manufacturer.
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