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MAX1291 Datasheet(Fiches technique) 1 Page - Maxim Integrated Products

Numéro de pièce MAX1291
Description  250ksps, 3V, 8-/4-Channel, 12-Bit ADCs with 2.5V Reference and Parallel Interface
Télécharger  20 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  http://www.maxim-ic.com
Logo 

 
 1 page
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For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
General Description
The MAX1291/MAX1293 low-power, 12-bit analog-to-
digital converters (ADCs) feature a successive-approxi-
mation ADC, automatic power-down, fast wake-up
(2µs), an on-chip clock, +2.5V internal reference, and a
high-speed, byte-wide parallel interface. They operate
with a single +3V analog supply and feature a VLOGIC
pin that allows them to interface directly with a +1.8V to
+5.5V digital supply.
Power consumption is only 5.7mW (VDD = VLOGIC) at
the maximum sampling rate of 250ksps. Two software-
selectable power-down modes enable the MAX1291/
MAX1293 to be shut down between conversions;
accessing the parallel interface returns them to normal
operation. Powering down between conversions can
cut supply current to under 10µA at reduced sampling
rates.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1291 has
8 input channels and the MAX1293 has 4 input chan-
nels (4 and 2 input channels, respectively, when in
pseudo-differential mode).
Excellent dynamic performance and low power com-
bined with ease of use and small package size make
these converters ideal for battery-powered and data-
acquisition applications or for other circuits with demand-
ing power consumption and space requirements.
The MAX1291 is available in a 28-pin QSOP package,
while the MAX1293 is available in a 24-pin QSOP. For
pin-compatible +5V, 12-bit versions, refer to the
MAX1290/MAX1292 data sheet.
Applications
Industrial Control Systems
Data Logging
Energy Management
Patient Monitoring
Data-Acquisition Systems
Touch Screens
Features
o 12-Bit Resolution, ±0.5LSB Linearity
o +3V Single Operation
o User-Adjustable Logic Level (+1.8V to +3.6V)
o Internal +2.5V Reference
o Software-Configurable, Analog Input Multiplexer
8-Channel Single-Ended/
4-Channel Pseudo-Differential (MAX1291)
4-Channel Single-Ended/
2-Channel Pseudo-Differential (MAX1293)
o Software-Configurable, Unipolar/Bipolar Inputs
o Low Power: 1.9mA (250ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
o Internal 3MHz Full-Power Bandwidth Track/Hold
o Byte-Wide Parallel (8+4) Interface
o Small Footprint: 28-Pin QSOP (MAX1291)
24-Pin QSOP (MAX1293)
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
________________________________________________________________ Maxim Integrated Products
1
19-1532; Rev 1; 2/00
PART
MAX1291ACEI
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
28 QSOP
Ordering Information
Pin Configurations
±0.5
INL
(LSB)
MAX1291BCEI
0°C to +70°C
±1
28 QSOP
Ordering Information continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
15
14
CH7
CS
QSOP
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
13
VLOGIC
VDD
REF
REFADJ
GND
COM
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CLK
WR
RD
INT
D0/D8
D1/D9
D2/D10
D3/D11
D4
D5
D6
D7
HBEN
MAX1291
Pin Configurations continued at end of data sheet.
EVALUATION
KIT
AVAILABLE
MAX1291BEEI
MAX1291AEEI
-40°C to +85°C
±1
-40°C to +85°C
±0.5
28 QSOP
28 QSOP




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