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.
Applications
Industrial Control Systems Data Logging
Energy Management Patient Monitoring
Data-Acquisition Systems Touch Screens
Features
♦ 12-Bit Resolution, ±0.5 LSB Linearity
♦ +3V Single-Supply Operation
♦ Internal +2.5V Reference
♦ Software-Configurable Analog Input Multiplexer
6-Channel Single Ended/
3-Channel Pseudo Differential (MAX1265)
2-Channel Single Ended/
1-Channel Pseudo Differential (MAX1267)
♦ Software-Configurable Unipolar/Bipolar
Analog Inputs
♦ Low Current
1.9mA (265ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
♦ Internal 3MHz Full-Power Bandwidth Track/Hold
♦ Parallel 12-Bit Interface
♦ Small Footprint
28-Pin QSOP (MAX1265)
24-Pin QSOP (MAX1267)
MAX1265/MAX1267
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
________________________________________________________________ Maxim Integrated Products 1
19-2721; Rev 0; 04/03
28 QSOP ±10°C to +70°CMAX1265BCEI
INL
(LSB)
±0.528 QSOP
PIN-PACKAGETEMP RANGE
0°C to +70°C
MAX1265ACEI
PART
Ordering Information
Pin Configurations
Typical Operating Circuits appear at end of data sheet.
Pin Configurations continued at end of data sheet.
28 QSOP ±0.5-40°C to +85°CMAX1265AEEI
28 QSOP ±1-40°C to +85°CMAX1265BEEI
24 QSOP ±0.5-40°C to +85°CMAX1267AEEG
24 QSOP ±1-40°C to +85°CMAX1267BEEG
24 QSOP ±10°C to +70°CMAX1267BCEG
±0.524 QSOP0°C to +70°C
MAX1267ACEG
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.