MAX1426 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 10-Bit, 10Msps ADC

19-1598 Rev 0; 1/00
10-Bit, 10Msps ADC
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
Functional Diagram
CLK
INP
T/H
INN
REF
INTERFACE
PIPELINE ADC
REF SYSTEM +
BIAS
MAX1426
OUTPUT
DRIVERS
AV_DD
AGND
D9–D0
DV_DD
DGND
REFIN REFP CML REFN
OE/PD
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
PART
MAX1426CAI
MAX1426EAI
Ordering Information
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
28 SSOP
28 SSOP
Pin Configuration
TOP VIEW
AGND 1
AV_DD 2
REFP 3
REFIN 4
REFN 5
CML 6
AGND 7
AV_DD 8
INP 9
INN 10
CMLP 11
CMLN 12
CLK 13
OE/PD 14
MAX1426
SSOP
28 D0
27 D1
26 D2
25 D3
24 D4
23 DGND
22 DV_DD
21 DGND
20 DV_DD
19 D5
18 D6
17 D7
16 D8
15 D9
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