19-2720; Rev 0; 04/03
400ksps, +5V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
General Description
Features
The MAX1262/MAX1264 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. The devices
operate with a single +5V analog supply and feature a
o 12-Bit Resolution, ±±0. ꢀLB ꢀineꢁaitꢂ
o +.V Lingle-Lupplꢂ Opeaꢁtion
o Usea-Adjustꢁble ꢀogic ꢀevel (+207V to +.0.V)
o Inteanꢁl +20.V Refeaence
o Loftwꢁae-Configuaꢁble Anꢁlog Input Multiplexea
8-Chꢁnnel Lingle Ended/
V
pin that allows them to interface directly with a
+2.7V to +5.5V digital supply.
LOGIC
4-Chꢁnnel Pseudo-Diffeaentiꢁl (MAX1262)
4-Chꢁnnel Lingle Ended/
2-Chꢁnnel Pseudo-Diffeaentiꢁl (MAX1264)
Power consumption is only 10mW (V
= V
) at a
DD
LOGIC
400ksps max sampling rate. Two software-selectable
power-down modes enable the MAX1262/MAX1264 to
be shut down between conversions; accessing the par-
allel interface returns them to normal operation.
Powering down between conversions can cut supply
current to under 10µA at reduced sampling rates.
o Loftwꢁae-Configuaꢁble Unipolꢁa/Bipolꢁa Anꢁlog
Inputs
o ꢀow Cuaaent
20.mA (4±±ksps)
10±mA (1±±ksps)
4±±µA (1±ksps)
2µA (Lhutdown)
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1262 has
eight input channels and the MAX1264 has four input
channels (four and two input channels, respectively,
when in pseudo-differential mode).
o Inteanꢁl 6MHz Full-Powea Bꢁndwidth Taꢁck/Hold
o Bꢂte-Wide Pꢁaꢁllel (8 + 4) Inteafꢁce
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.
o Lmꢁll Footpaint
28-Pin QLOP (MAX1262)
24-Pin QLOP (MAX1264)
Pin Configurations
The MAX1262 is available in a 28-pin QSOP package,
while the MAX1264 comes in a 24-pin QSOP. For pin-
compatible +3V, 12-bit versions, refer to the MAX1261/
MAX1263 data sheet.
TOP VIEW
HBEN
D7
1
2
3
4
5
6
7
8
9
24
23
V
V
LOGIC
DD
Applications
D6
22 REF
21 REFADJ
20 GND
19 COM
18 CH0
17 CH1
16 CH2
15 CH3
14 CS
Industrial Control Systems
Energy Management
Data Logging
D5
Patient Monitoring
Touch Screens
D4
MAX1264
Data-Acquisition Systems
D3/D11
D2/D10
D1/D9
D0/D8
Ordering Information
INT 10
RD 11
WR 12
INꢀ
TEMP RANGE PIN-PACKAGE
(ꢀLB)
PART
13 CLK
28 QSOP
28 QSOP
28 QSOP
28 QSOP
MAX1262ACEI
MAX1262BCEI
MAX1262AEEI
MAX1262BEEI
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0.5
1
QLOP
0.5
1
Pin Configurations continued at end of data sheet.
Ordering Information continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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.