MAX1090BEEI Maxim Integrated, MAX1090BEEI Datasheet

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MAX1090BEEI

Manufacturer Part Number
MAX1090BEEI
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1090BEEI

Number Of Channels
8/4
Architecture
SAR
Conversion Rate
400 KSPs
Resolution
10 bit
Input Type
Single-Ended/Pseudo-Differential
Snr
Yes
Interface Type
Parallel
Operating Supply Voltage
2.7 V to 5.5 V, 5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QSOP-28
Maximum Power Dissipation
667 mW
Minimum Operating Temperature
- 40 C
Number Of Converters
1
Voltage Reference
Internal 2.5 V or External

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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
V
+2.7V to +5.5V digital supply.
Power consumption is only 10mW (V
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
not desired.
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.
19-1640; Rev 2; 12/02
Ordering Information continued at end of data sheet.
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.
MAX1090ACEI
MAX1090BCEI
MAX1090AEEI
MAX1090BEEI
LOGIC
Industrial Control Systems
Energy Management
Data-Acquisition Systems
PART
pin that allows them to interface directly with a
with +2.5V Reference and Parallel Interface
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
________________________________________________________________ Maxim Integrated Products
400ksps, +5V, 8-/4-Channel, 10-Bit ADCs
Ordering Information
General Description
28 QSOP
28 QSOP
28 QSOP
28 QSOP
PIN-PACKAGE
Applications
Data Logging
Patient Monitoring
Touchscreens
DD
= V
LOGIC
(LSB)
±0.5
±1
±0.5
±1
INL
) at a
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
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)
Typical Operating Circuits appear at end of data sheet.
Pin Configurations continued at end of data sheet.
Inputs
TOP VIEW
8-Channel Single-Ended/
4-Channel Pseudo-Differential (MAX1090)
4-Channel Single-Ended/
2-Channel Pseudo-Differential (MAX1092)
D1/D9
D0/D8
HBEN
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
INT
WR
RD
D7
D6
D5
D4
D3
D2
24-Pin QSOP (MAX1092)
10
11
12
1
2
3
4
5
6
7
8
9
MAX1092
QSOP
Pin Configurations
24
23
22
21
20
19
18
17
16
15
14
13
V
V
REF
REFADJ
GND
COM
CH0
CH1
CH2
CH3
CS
CLK
LOGIC
DD
Features
1

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MAX1090BEEI Summary of contents

Page 1

... MAX1090BCEI 0°C to +70°C 28 QSOP MAX1090AEEI -40°C to +85°C 28 QSOP MAX1090BEEI -40°C to +85°C 28 QSOP Ordering Information continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. ...

Page 2

ADCs with +2.5V Reference and Parallel Interface ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. GND.........................................................-0.3V to +6V LOGIC CH0–CH7, COM to GND ............................-0. REF, REFADJ to GND.................................-0. ...

Page 3

ADCs with +2.5V Reference and Parallel Interface ELECTRICAL CHARACTERISTICS (continued +5V ±10%, COM = GND, REFADJ = V DD LOGIC cycle unless otherwise noted. Typical values ...

Page 4

ADCs with +2.5V Reference and Parallel Interface ELECTRICAL CHARACTERISTICS (continued +5V ±10%, COM = GND, REFADJ = V DD LOGIC cycle unless otherwise noted. Typical values ...

Page 5

ADCs with +2.5V Reference and Parallel Interface TIMING CHARACTERISTICS (continued +5V ±10%, COM = GND, REFADJ = V DD LOGIC cycle unless otherwise noted. Typical values ...

Page 6

ADCs with +2.5V Reference and Parallel Interface ( +5V +2.500V LOGIC REF INTEGRAL NONLINEARITY vs. OUTPUT CODE 0.25 0.20 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -0.25 0 ...

Page 7

ADCs with +2.5V Reference and Parallel Interface ( +5V +2.500V LOGIC REF INTERNAL REFERENCE VOLTAGE vs. SUPPLY VOLTAGE 2.53 2.52 2.51 2.50 2.49 2.48 4.50 4.75 5.00 5.25 V ...

Page 8

ADCs with +2.5V Reference and Parallel Interface PIN NAME MAX1090 MAX1092 High Byte Enable. Used to multiplex the 10-bit conversion result HBEN 1: 2 MSBs are multiplexed on the data bus LSBs ...

Page 9

ADCs with +2.5V Reference and Parallel Interface (CH7) (CH6) (CH5) (CH4) ANALOG INPUT CH3 MULTIPLEXER CH2 CH1 CH0 COM CLK CLOCK CS CONTROL LOGIC WR AND RD LATCHES INT ( ) ARE FOR MAX1090 ONLY. Figure ...

Page 10

ADCs with +2.5V Reference and Parallel Interface 10-BIT CAPACITIVE DAC REF INPUT C HOLD MUX ZERO – + CH0 CH1 12pF CH2 R IN 800Ω CH3 C SWITCH HOLD CH4 TRACK AT THE SAMPLING INSTANT, CH5 ...

Page 11

ADCs with +2.5V Reference and Parallel Interface initiate a combined acquisition plus conversion. The sam- pling interval occurs at the end of the acquisition interval. The ACQMOD (acquisition mode) bit in the input control byte (Table ...

Page 12

ADCs with +2.5V Reference and Parallel Interface CSWS CONTROL D7–D0 BYTE ACQMOD = "0" HIGH-Z INT RD HBEN HIGH-Z DOUT Figure 4. Conversion Timing Using Internal Acquisition ...

Page 13

ADCs with +2.5V Reference and Parallel Interface Select internal clock mode to release the µP from the burden of running the SAR conversion clock. To select this mode, bit D7 of the control byte must be ...

Page 14

ADCs with +2.5V Reference and Parallel Interface Digital Interface Input (control byte) and output data are multiplexed on a three-state parallel interface. This parallel interface (I/O) can easily be interfaced with standard µPs. The signals CS, ...

Page 15

ADCs with +2.5V Reference and Parallel Interface Table 5. Data-Bus Output ( Parallel Interface) PIN HBEN = 0 HBEN = 1 D0 Bit 0 (LSB) Bit 8 D1 Bit 1 Bit 9 (MSB) BIPOLAR ...

Page 16

ADCs with +2.5V Reference and Parallel Interface only 50µs are required after power-up. Enter standby mode by performing a dummy conversion with the con- trol byte specifying standby mode. Note: Bypass capacitors larger than 4.7µF between ...

Page 17

ADCs with +2.5V Reference and Parallel Interface High-frequency noise in the power supply (V influence the proper operation of the ADC’s fast com- parator. Bypass V to the star ground with a network DD of two ...

Page 18

ADCs with +2.5V Reference and Parallel Interface SUPPLIES +3V V 4.7µ 5Ω 0.1µF GND V COM DD MAX1090 MAX1092 *OPTIONAL Figure 11. Power-Supply and Grounding Connections Signal-to-Noise Ratio For a waveform perfectly reconstructed from ...

Page 19

ADCs with +2.5V Reference and Parallel Interface CLK V LOGIC MAX1090 REF µP WR REFADJ CONTROL INPUTS RD HBEN INT CH7 D7 CH6 CH5 D6 CH4 D5 CH3 D4 CH2 D3 CH1 D2 ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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