MAX1109EUB-T Maxim Integrated, MAX1109EUB-T Datasheet

no-image

MAX1109EUB-T

Manufacturer Part Number
MAX1109EUB-T
Description
Analog to Digital Converters - ADC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1109EUB-T

Number Of Channels
2
Architecture
SAR
Conversion Rate
50 KSPs
Resolution
8 bit
Input Type
Single-Ended/Pseudo-Differential
Snr
49 dB
Interface Type
QSPI, Serial (SPI, Microwire)
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
uMAX
Maximum Power Dissipation
444 mW
Minimum Operating Temperature
- 40 C
Number Of Converters
1
Voltage Reference
4.096 V
The MAX1108/MAX1109 low-power, 8-bit, dual-channel,
analog-to-digital converters (ADCs) feature an internal
track/hold (T/H) voltage reference, clock, and serial inter-
face. The MAX1108 is specified from +2.7V to +3.6V and
consumes only 105µA. The MAX1109 is specified from
+4.5V to +5.5V and consumes only 130µA. The analog
inputs are software configurable, allowing unipolar/bipolar
and single-ended/differential operation; battery monitor-
ing capability is also included.
The full-scale analog input range is determined by the
internal reference of +2.048V (MAX1108) or +4.096V
(MAX1109), or by an externally applied reference rang-
ing from 1V to V
a software power-down mode that reduces power con-
sumption to 0.5µA when the device is not in use. The
4-wire serial interface directly connects to SPI™, QSPI™,
and MICROWIRE™ devices without external logic.
Conversions up to 50ksps are performed using either the
internal clock or an external serial-interface clock.
The MAX1108 and MAX1109 are available in a 10-pin
µMAX package with a footprint that is just 20% of an
8-pin plastic DIP.
19-1399; Rev 1; 6/03
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
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.
Portable Data Logging
Hand-Held Measurement Devices
Medical Instruments
System Diagnostics
Solar-Powered Remote Systems
4–20mA-Powered Remote Systems
Receive-Signal Strength Indicators
TOP VIEW
GND
CH0
CH1
DD
V
REF
DD
________________________________________________________________ Maxim Integrated Products
. The MAX1108/MAX1109 also feature
1
2
3
4
5
General Description
MAX1108
MAX1109
MAX
Pin Configuration
Applications
10
9
8
7
6
SCLK
DOUT
DIN
CS
COM
2-Channel, Serial 8-Bit ADCs
Single-Supply, Low-Power,
o Single Supply: +2.7V to +3.6V (MAX1108)
o Low Power: 105µA at +3V and 50ksps
o Software-Configurable Unipolar or Bipolar Inputs
o Input Voltage Range: 0 to V
o Internal Track/Hold
o Internal Reference: +2.048V (MAX1108)
o Reference Input Range: 1V to V
o SPI/QSPI/MICROWIRE-Compatible Serial Interface
o V
o Small 10-Pin µMAX Package
MAX1108CUB
MAX1108EUB
MAX1109CUB
MAX1109EUB
SCLK
DD
COM
CH0
CH1
REF
DIN
CS
PART
Monitoring Mode
ANALOG
INPUT
MUX
MAX1108
MAX1109
REFERENCE
INTERNAL
0.5µA in Power-Down Mode
CONTROL
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
+4.5V to +5.5V (MAX1109)
LOGIC
0°C to +70°C
0°C to +70°C
REGISTER
INPUT
SHIFT
Ordering Information
Functional Diagram
+4.096V (MAX1109)
T/H
REDISTRIBUTION
OSCILLATOR
INTERNAL
CHARGE
DD
DAC
DD
10 µMAX
10 µMAX
10 µMAX
10 µMAX
PIN-PACKAGE
REGISTER
V
GND
OUTPUT
DD
SHIFT
SAR
Features
DOUT
1

Related parts for MAX1109EUB-T

MAX1109EUB-T Summary of contents

Page 1

... Input Voltage Range Internal Track/Hold o Internal Reference: +2.048V (MAX1108) o Reference Input Range SPI/QSPI/MICROWIRE-Compatible Serial Interface o V Monitoring Mode DD o Small 10-Pin µMAX Package PART MAX1108CUB Applications MAX1108EUB MAX1109CUB MAX1109EUB CS SCLK DIN 10 SCLK CH0 9 DOUT CH1 8 DIN COM 7 ...

Page 2

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD CH0, CH1, COM, REF, DOUT to GND .......-0. DIN, SCLK GND ............................................-0.3V to +6V Continuous Power Dissipation (T = +70°C) ...

Page 3

ELECTRICAL CHARACTERISTICS—MAX1108 (continued +2.7V to +3.6V; unipolar input mode; COM = GND sion cycle (50ksps); 1µF capacitor at REF, external +2.048V reference at REF; T values are +25°C.) A PARAMETER SYMBOL TRACK/HOLD Conversion ...

Page 4

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs ELECTRICAL CHARACTERISTICS—MAX1108 (continued +2.7V to +3.6V; unipolar input mode; COM = GND sion cycle (50ksps); 1µF capacitor at REF, external +2.048V reference at REF; T values are ...

Page 5

ELECTRICAL CHARACTERISTICS—MAX1109 (continued +4.5V to +5.5V; unipolar input mode; COM = GND cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T are +25°C.) A PARAMETER SYMBOL DYNAMIC PERFORMANCE (10kHz sine-wave ...

Page 6

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs ELECTRICAL CHARACTERISTICS—MAX1109 (continued +4.5V to +5.5V; unipolar input mode; COM = GND cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T are +25°C.) A ...

Page 7

ELECTRICAL CHARACTERISTICS—MAX1109 (continued +4.5V to +5.5V; unipolar input mode; COM = GND cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T are +25°C.) A PARAMETER SYMBOL CS to SCLK Rise ...

Page 8

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs (V = +3.0V (MAX1108 +5.0V (MAX1109); external conversion mode REF +25°C; unless otherwise noted.) A OFFSET ERROR vs. SUPPLY VOLTAGE 0.5 0.4 0.3 0.2 0.1 0 -0.1 ...

Page 9

V = +5.0V (MAX1109); external conversion mode REF +25°C; unless otherwise noted.) A INTEGRAL NONLINEARITY vs. CODE 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0 100 ...

Page 10

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs DOUT DOUT 3k C LOAD DGND a) High and High Figure 1. Load Circuits for Enable Time _______________Detailed Description The MAX1108/MAX1109 analog-to-digital converters ...

Page 11

C through R HOLD acquisition the T/H switch opens and C nected to COM, retaining charge on C ple of the signal at CH0, and the difference between CH0 and COM is the converted signal. Once conver- sion ...

Page 12

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs The serial interface provides easy connection to micro- controllers with SPI, QSPI and MICROWIRE serial inter- faces at clock rates up to 2MHz. For SPI and QSPI, set CPOL = CPHA = 0 in ...

Page 13

Table 1. Control Byte Format BIT 7 BIT 6 (MSB) START SEL2 BIT NAME The first logic “1” bit after CS goes low defines the beginning of the control byte. 7 (MSB) START 6 SEL2 5 SEL1 Selects the mode ...

Page 14

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs initiated. The MSB successive-approximation bit deci- sion is made on the rising edge of the seventh SCLK. On the falling edge of the eighth SCLK, the MSB is clocked out on the DOUT pin; ...

Page 15

CS does not need to be held low once a conversion is started. Pulling CS high prevents data from being clocked into the MAX1108/MAX1109 and three-states DOUT, but it does not adversely affect an internal clock-mode conversion already in progress. ...

Page 16

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs to the SCLK pin; varying the analog input alters the result of conversion that is clocked out at the DOUT pin. A total of 10 clock cycles is required per conversion. The falling edge ...

Page 17

In external clock mode toggled before the cur- rent conversion is complete, the current conversion is terminated, and the next high bit clocked into DIN is recognized as a new start bit. This can be useful in ...

Page 18

Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs To use an external reference, set bit 2 (I/EREF) and bit 1 (REFSHDN) of control byte to 0 and connect the external reference (V between 1V and V REF at the REF pin. The ...

Page 19

SYSTEM POWER SUPPLIES GND 0.1 F GND COM V DD MAX1108 MAX1109 Figure 13. Power-Supply Connections ______________________________________________________________________________________ Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs TRANSISTOR COUNT: 2373 +3V/+5V DGND V DD DIGITAL CIRCUITRY Chip Information 19 ...

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 © 2003 Maxim Integrated Products ...

Related keywords