19-0119; Rev. 1; 12/93
al
anu t
M e
Kit
e
on ta Sh
ati Da
lu
Eva llows
Fo
+3V, 8-Bit ADC with 1µA Power-Down
___________________________Features
o
Single +3.0V to +3.6V Supply
o
1.8µs Conversion Time
o
Power-Up in 900ns
o
Internal Track/Hold
o
400ksps Throughput
o
Low Power: 1.5mA (Operating Mode)
1µA
(Power-Down Mode)
o
300kHz Full-Power Bandwidth
o
20-Pin DIP, SO and SSOP Packages
o
No External Clock Required
o
Unipolar/Bipolar Inputs
o
Ratiometric Reference Inputs
o
2.7V Version Available – Contact Factory
_______________General Description
The MAX152 high-speed, microprocessor (µP)-com-
patible, 8-bit analog-to-digital converter (ADC) uses a
half-flash technique to achieve a 1.8µs conversion
time, and digitizes at a rate of 400k samples per sec-
ond (ksps). It operates with single +3V or dual ±3V
supplies and accepts either unipolar or bipolar inputs.
– —— — ——
— — —
–
A P O W E R D O W N pin reduces current consumption to
a typical value of 1µA. The part returns from power-
down and acquires an input signal in less than 900ns,
providing large reductions in supply current in applica-
tions with burst-mode input signals.
The MAX152 is DC and dynamically tested. Its µP inter-
face appears as a memory location or input/output port that
requires no external interface logic. The data outputs use
latched, three-state buffered circuitry for direct connection
to a µP data bus or system input port. The ADC's input/ref-
erence arrangement enables ratiometric operation. A fully-
assembled evaluation kit provides a proven PC board lay-
out to speed prototyping and design.
MAX152
______________Ordering Information
PART
MAX152CPP
MAX152CWP
MAX152CAP
MAX152C/D
MAX152EPP
MAX152EWP
MAX152EAP
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 Plastic DIP
20 Wide SO
20 SSOP
Dice*
20 Plastic DIP
20 Wide SO
20 SSOP
_______________________Applications
Cellular Telephones
Portable Radios
Battery-Powered Systems
Burst-Mode Data Acquisition
Digital Signal Processing
Telecommunications
High-Speed Servo Loops
20 CERDIP**
MAX152MJP
-55°C to +125°C
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
________________Functional Diagram
VDD
12
VREF+
11
VREF-
VIN 1
20
18
4-BIT
FLASH
ADC
__________________Pin Configuration
TOP VIEW
VIN
PWRDN
1
2
3
4
5
6
7
8
9
20
19
18
17
VDD
VSS
PWRDN
D7 (MSB)
D6
D5
D4
CS
VREF+
VREF-
D0 (LSB)
D1
THREE-
STATE
DRIVERS
D0-D7
DATA
OUT
PINS
2-5,
14-17
D2
D3
WR/RDY
MODE
RD
INT
4-BIT
DAC
VREF+
16 4-BIT
FLASH
ADC
(4LSB)
TIMING AND CONTROL CIRCUITRY
6
7
10
13
8
GND MODE
WR/RDY
CS
RD
MAX152
16
15
14
13
12
11
MAX152
GND
10
19
9
INT
VSS
DIP/SO/SSOP
1
________________________________________________________________
Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
