MAX1090 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – 400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface

19-1640; Rev 0; 1/00
EVAALVUAAILTAIOBNLEKIT
400ksps, +5V, 8-/4-Channel, 10-Bit ADCs
with +2.5V Reference and Parallel Interface
General Description
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), on-chip clock, +2.5V internal reference, and
high-speed, byte-wide parallel interface. The devices
operate with a single +5V analog supply and feature a
V_LOGIC pin that allows them to interface directly with a
+2.7V to +5.5V digital supply.
Power consumption is only 10mW (V_DD = V_LOGIC) 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
demanding power consumption and space require-
ments.
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.
Applications
Industrial Control Systems
Data Logging
Energy Management
Patient Monitoring
Data-Acquisition Systems
Touchscreens
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
INL
(LSB)
MAX1090ACEI 0°C to +70°C
MAX1090BCEI 0°C to +70°C
MAX1090AEEI -40°C to +85°C
MAX1090BEEI -40°C to +85°C
28 QSOP
28 QSOP
28 QSOP
28 QSOP
±0.5
±1
±0.5
±1
Ordering Information continued at end of data sheet.
Features
o 10-Bit Resolution, ±0.5LSB 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
8-Channel Single-Ended/
4-Channel Pseudo-Differential (MAX1090)
4-Channel Single-Ended/
2-Channel Pseudo-Differential (MAX1092)
o Software-Configurable Unipolar/Bipolar Analog
Inputs
o Low Current: 2.2mA (400ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (shutdown)
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
TOP VIEW
HBEN 1
D7 2
D6 3
D5 4
D4 5
D3 6
D2 7
D1/D9 8
D0/D8 9
INT 10
RD 11
WR 12
MAX1092
QSOP
24 V_LOGIC
23 V_DD
22 REF
21 REFADJ
20 GND
19 COM
18 CH0
17 CH1
16 CH2
15 CH3
14 CS
13 CLK
Pin Configurations continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
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