MAX1265 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

19-2721; Rev 0; 04/03
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
General Description
The MAX1265/MAX1267 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 12-bit parallel interface. They operate with
a single +2.7V to +3.6V analog supply.
Power consumption is only 5.4mW at the maximum
sampling rate of 265ksps. Two software-selectable
power-down modes enable the MAX1265/MAX1267 to
be shut down between conversions; accessing the par-
allel interface returns them to normal operation.
Powering down between conversions can reduce sup-
ply current below 10µA at lower sampling rates.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1265 has
six input channels and the MAX1267 has two (three
input channels and one input channel, 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
MAX1265 is offered in a 28-pin QSOP package, while the
MAX1267 comes in a 24-pin QSOP. For pin-compatible
+5V, 12-bit versions, refer to the MAX1266/MAX1268
data sheet.
Industrial Control Systems
Energy Management
Data-Acquisition Systems
Applications
Data Logging
Patient Monitoring
Touch Screens
Ordering Information
PART
TEMP RANGE
MAX1265ACEI 0°C to +70°C
MAX1265BCEI 0°C to +70°C
MAX1265AEEI -40°C to +85°C
MAX1265BEEI -40°C to +85°C
MAX1267ACEG 0°C to +70°C
MAX1267BCEG 0°C to +70°C
MAX1267AEEG -40°C to +85°C
MAX1267BEEG -40°C to +85°C
PIN-PACKAGE
28 QSOP
28 QSOP
28 QSOP
28 QSOP
24 QSOP
24 QSOP
24 QSOP
24 QSOP
INL
(LSB)
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
Features
o 12-Bit Resolution, ±0.5 LSB Linearity
o +3V Single-Supply Operation
o Internal +2.5V Reference
o Software-Configurable Analog Input Multiplexer
6-Channel Single Ended/
3-Channel Pseudo Differential (MAX1265)
2-Channel Single Ended/
1-Channel Pseudo Differential (MAX1267)
o Software-Configurable Unipolar/Bipolar
Analog Inputs
o Low Current
1.9mA (265ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
o Internal 3MHz Full-Power Bandwidth Track/Hold
o Parallel 12-Bit Interface
o Small Footprint
28-Pin QSOP (MAX1265)
24-Pin QSOP (MAX1267)
Pin Configurations
TOP VIEW
D9 1
D8 2
D7 3
D6 4
D5 5
D4 6
D3 7
D2 8
D1 9
D0 10
INT 11
RD 12
WR 13
CLK 14
MAX1265
28 D10
27 D11
26 V_DD
25 REF
24 REFADJ
23 GND
22 COM
21 CH0
20 CH1
19 CH2
18 CH3
17 CH4
16 CH5
15 CS
QSOP
Pin Configurations continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
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