Rainbow Electronics MAX1092 - Manual

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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
Features
♦ 10-Bit Resolution, ±0.5LSB Linearity
♦ +5V Single-Supply Operation
♦ User-Adjustable Logic Level (+2.7V to +5.5V)
♦ Internal +2.5V Reference
♦ Software-Configurable Analog Input Multiplexer
8-Channel Single-Ended/
4-Channel Pseudo-Differential (MAX1090)
4-Channel Single-Ended/
2-Channel Pseudo-Differential (MAX1092)
♦ Software-Configurable Unipolar/Bipolar Analog
Inputs
♦ Low Current: 2.2mA (400ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (shutdown)
♦ Internal 6MHz Full-Power Bandwidth Track/Hold
♦ Byte-Wide Parallel (8+2) Interface
♦ Small Footprint: 28-Pin QSOP (MAX1090)
24-Pin QSOP (MAX1092)
MAX1090/MAX1092
400ksps, +5V, 8-/4-Channel, 10-Bit ADCs
with +2.5V Reference and Parallel Interface
________________________________________________________________ Maxim Integrated Products 1
19-1640; Rev 0; 1/00
PART
MAX1090ACEI 0°C to +70°C
TEMP. RANGE PIN-PACKAGE
28 QSOP
Ordering Information
Pin Configurations
±0.5
INL
(LSB)
MAX1090BCEI 0°C to +70°C ±1 28 QSOP
MAX1090BEEI
MAX1090AEEI
-40°C to +85°C ±1
-40°C to +85°C ±0.5 28 QSOP
28 QSOP
Ordering Information continued at end of data sheet. Typical Operating Circuits appear at end of data sheet.
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
V LOGIC
V DD
REF
REFADJ
GND
COM
CH0
CH1
CH2
CH3
CS
CLK WR
RD
INT
D0/D8
D1/D9
D2
D3
D4
D5
D6
D7
HBEN
QSOP
MAX1092
TOP VIEW
Pin Configurations continued at end of data sheet.
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