19-1640; Rev 2; 12/02
400ksps, +5V, 8-/4-Channel, 10-Bit ADCs
with +2.5V Reference and Parallel Interface
The MAX1090/MAX1092 low-power, 10-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
VLOGIC pin that allows them to interface directly with a
+2.7V to +5.5V digital supply.
Power consumption is only 10mW (VDD = VLOGIC) at a
400ksps max sampling rate. Two software-selectable
power-down modes enable the MAX1090/MAX1092 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.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1090 has
eight input channels and the MAX1092 has four input
channels (four and two 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 MAX1090/MAX1092 tri-states INT when CS goes
high. Refer to the MAX1060/MAX1064 if tri-stating INT is
The MAX1090 is available in a 28-pin QSOP package,
while the MAX1092 comes in a 24-pin QSOP. For pin-
compatible +3V, 10-bit versions, refer to the MAX1091/
MAX1093 data sheet.
Industrial Control Systems
TEMP RANGE PIN-PACKAGE
MAX1090ACEI 0°C to +70°C
MAX1090BCEI 0°C to +70°C
MAX1090AEEI -40°C to +85°C
MAX1090BEEI -40°C to +85°C
Ordering Information continued at end of data sheet.
o 10-Bit Resolution, ±0.5 LSB Linearity
o +5V Single-Supply Operation
o User-Adjustable Logic Level (+2.7V to +5.5V)
o Internal +2.5V Reference
o Software-Configurable Analog Input Multiplexer
4-Channel Pseudo-Differential (MAX1090)
2-Channel Pseudo-Differential (MAX1092)
o Software-Configurable Unipolar/Bipolar Analog
o Low Current: 2.5mA (400ksps)
o Internal 6MHz Full-Power Bandwidth Track/Hold
o Byte-Wide Parallel (8 + 2) Interface
o Small Footprint: 28-Pin QSOP (MAX1090)
24-Pin QSOP (MAX1092)
Pin Configurations 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.