19-1100; Rev 0; 6/96
8 -Bit , 3 0 0 Ms p s Fla s h ADC
MAX125
_______________Ge n e ra l De s c rip t io n
The MAX1125 is a monolithic, flash analog-to-digital con-
verter (ADC) capable of digitizing a 2V analog input signal
into 8-bit digital words at a typical 300Msps update rate.
____________________________Fe a t u re s
♦ Metastable Errors Reduced to 1LSB
♦ 10pF Input Capacitance
♦ 210MHz Input Bandwidth
For most applications, no external sample-and-hold is
required for accurate conversion due to the device's
narrow aperture time, wide bandwidth, and low input
capacitance. A single standard -5.2V power supply is
required to operate the MAX1125, with nominal 2.2W
power dissipation. A special decoding scheme reduces
metastable errors to 1LSB.
♦ 300Msps Conversion Rate
♦ 2.2W Typical Power Dissipation
♦ Single -5.2V Supply
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE PIN-PACKAGE INL (LSBs)
MAX1125AIDO -20°C to +85°C 42 Ceramic SB
MAX1125BIDO -20°C to +85°C 42 Ceramic SB
MAX1125AIBH -20°C to +85°C 44 CERQUAD
MAX1125BIBH -20°C to +85°C 44 CERQUAD
±0.75
±1
The part is packaged in a 42-pin ceramic sidebraze
tha t is p in c omp a tib le with the CX20116 a nd
CX41396D. The surface-mount 44-pin CERQUAD pack-
age allows access to additional reference ladder taps,
an overrange bit, and a data-ready output. The pin-
compatible 150Msps MAX1114 is also available.
±0.75
±1
Functional Diagram appears at end of data sheet.
____P in Co n fig u ra t io n s (c o n t in u e d )
________________________Ap p lic a t io n s
Digital Oscilloscopes
Transient Capture
TOP VIEW
Radar, EW, ECM
N.C.
VRTF
N.C.
V
1
2
3
4
5
6
7
8
9
Direct RF Down-Conversion
Medical Electronics
Ultrasound, CAT Instrumentation
EE
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
N.C.
LINV
V
EE
V
EE
MAX1125
_________________P in Co n fig u ra t io n s
V
EE
AGND
DGND
DO (LSB)
D1
N.C.
TOP VIEW
N.C.
AGND
VIN
D2
AGND
VR2
D3 10
DGND
AGND
1
2
33 AGND
32
11
12
13
14
15
16
17
18
19
20
21
D4
D5
V
EE
AGND
VIN
V
EE
3
31 LINV
30 N.C.
D6
4
MINV
CLK
CLK
AGND
N.C.
D7 (MSB)
DGND
AGND
5
29
28
27
26
DRINV
N.C.
MAX1125
6
V
EE
V
EE
7
N.C.
AGND
AGND
VRBS
VRBF
8
AGND
V
EE
V
EE
9
25 AGND
24 VRTS
23 VRTF
V
EE
MINV
N.C.
10
11
N.C.
VRBF
N.C.
CLK
CLK
Ceramic SB
CERQUAD
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800