MAX145ACUA+ Maxim Integrated Products, MAX145ACUA+ Datasheet

IC ADC 12BIT 108KSPS 8-UMAX

MAX145ACUA+

Manufacturer Part Number
MAX145ACUA+
Description
IC ADC 12BIT 108KSPS 8-UMAX
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX145ACUA+

Number Of Bits
12
Sampling Rate (per Second)
108k
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
330mW
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX144/MAX145 low-power, 12-bit analog-to-
digital converters (ADCs) are available in 8-pin µMAX
and DIP packages. Both devices operate with a single
+2.7V to +5.25V supply and feature a 7.4µs succes-
sive-approximation ADC, automatic power-down, fast
wake-up (2.5µs), an on-chip clock, and a high-speed,
3-wire serial interface.
Power consumption is only 3.2mW (V
maximum sampling rate of 108ksps. At slower through-
put rates, the automatic shutdown (0.2µA) further
reduces power consumption.
The MAX144 provides 2-channel, single-ended opera-
tion and accepts input signals from 0 to V
MAX145 accepts pseudo-differential inputs ranging
from 0 to V
through the 3-wire serial interface, which is SPI™,
QSPI™, and MICROWIRE™-compatible.
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. For pin-compatible 10-bit ADCs, see the
MAX157 and MAX159 data sheets.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
19-1387; Rev 2; 10/05
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process-Control Monitoring
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.
( ) ARE FOR MAX145 ONLY
TOP VIEW
CH0 (CH+)
CH1 (CH-)
REF
GND
V
DD
. An external clock accesses data-
________________________________________________________________ Maxim Integrated Products
1
2
4
3
+2.7V, Low-Power, 2-Channel, 108ksps,
µMAX/DIP
General Description
MAX144
MAX145
Pin Configuration
Instrumentation
Test Equipment
Medical Instruments
System Supervision
Applications
6
8
7
5
Serial 12-Bit ADCs in 8-Pin µMAX
DD
SCLK
CS/SHDN
DOUT
REF
= +3.6V) at the
REF
. The
®
♦ Single-Supply Operation (+2.7V to +5.25V)
♦ Two Single-Ended Channels (MAX144) One
♦ Low Power
♦ Internal Track/Hold
♦ 108ksps Sampling Rate
♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial
♦ Space-Saving 8-Pin µMAX Package
♦ Pin-Compatible 10-Bit Versions Available
*Dice are specified at T
**Contact factory for availability.
Ordering Information continued at end of data sheet.
MAX144ACUA
MAX144BCUA
MAX144ACPA
MAX144BCPA
MAX144BC/D
MAX144AEUA
MAX144BEUA
MAX144AEPA
MAX144BEPA
MAX144AMJA
MAX144BMJA
Pseudo-Differential Channel (MAX145)
Interface
0.9mA (108ksps, +3V Supply)
100µA (10ksps, +3V Supply)
10µA (1ksps, +3V Supply)
0.2µA (Power-Down Mode)
PART
RANGE
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
-40°C to
+85°C
-40°C to
+85°C
-40°C to
+85°C
-40°C to
+85°C
-55°C to
+125°C
-55°C to
+125°C
TEMP
A
Ordering Information
= +25°C, DC parameters only.
PIN-
PACKAGE
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
Dice*
8 µMAX
8 µMAX
8 Plastic DIP
8 Plastic DIP
8 CERDIP**
8 CERDIP**
(LSB)
±0.5
±1
±0.5
±1
±1
±0.5
±1
±0.5
±1
±0.5
±1
Features
INL
CODE
PKG
U8-1
U8-1
U8-1
U8-1
P8-1
P8-1
P8-1
P8-1
J8-2
J8-2
1

Related parts for MAX145ACUA+

MAX145ACUA+ Summary of contents

Page 1

... GND 4 µMAX/DIP ( ) ARE FOR MAX145 ONLY µMAX is a registered trademark of Maxim Integrated Products, Inc. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’ ...

Page 2

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD CH0, CH1 (CH+, CH-) to GND ................. -0. REF to GND .............................................. -0. Digital Inputs to ...

Page 3

Low-Power, 2-Channel, 108ksps, ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.25V 2.5V, 0.1µF capacitor at REF REF CH- = GND for MAX145 MIN PARAMETER SYMBOL ANALOG INPUTS Analog Input ...

Page 4

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX TIMING CHARACTERISTICS (Figure +2.7V to +5.25V 2.5V, 0.1µF capacitor at REF, fSCLK = 2.17MHz, 16 clocks/conversion cycle (108ksps), CH-= GND DD REF for MAX145, T ...

Page 5

Low-Power, 2-Channel, 108ksps +3.0V 2.5V, 0.1µF at REF REF unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 1500 REF 50pF 1300 L CODE = ...

Page 6

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX (V = +3.0V 2.5V, 0.1µF at REF REF unless otherwise noted.) INTEGRAL NONLINEARITY vs. OUTPUT CODE 0.20 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 0 ...

Page 7

Low-Power, 2-Channel, 108ksps, DOUT 6k GND a) HIGH AND Figure 1. Load Circuits for Enable and Disable Time _______________Detailed Description The MAX144/MAX145 analog-to-digital converters (ADCs) use a successive-approximation ...

Page 8

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX The capacitive digital-to-analog converter (DAC) adjusts during the remainder of the conversion cycle to restore node ZERO to 0V within the limits of 12-bit resolution. This action is equivalent to ...

Page 9

Low-Power, 2-Channel, 108ksps, Selecting Clock Mode To start the conversion process on the MAX144/ MAX145, pull CS/SHDN low. At CS/SHDN’s falling edge, the part wakes up and the internal T/H enters track mode. In addition, the state of SCLK ...

Page 10

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX Table 1. Serial Output Data Stream for Internal and External Clock Mode SCLK CYCLE 1 2 DOUT (Internal Clock) EOC 1 DOUT (External Clock External Reference An external ...

Page 11

Low-Power, 2-Channel, 108ksps, DOUT valid timing characteristic. Data should be clocked into the µP on SCLK’s rising edge. 4) Pull CS/SHDN high at or after the 16th falling clock edge. If CS/SHDN remains low, trailing zeros will be clocked ...

Page 12

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX fication, and the first four data bits starting with the MSB. The second 8-bit data stream contains the remaining bits, D7 through D0. Using the high-speed QSPI interface with CPOL ...

Page 13

Low-Power, 2-Channel, 108ksps, Table 3. Detailed SSPSTAT Register Contents MAX144/MAX145 CONTROL BIT SETTINGS SMP BIT7 0 CKE BIT6 1 D/A BIT5 X P BIT4 X S BIT3 X R/W BIT2 X UA BIT1 X BF BIT0 ...

Page 14

Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX POWER SUPPLIES + 1mF 0 GND MAX144 MAX145 * OPTIONAL FILTER RESISTOR Figure 11. Power-Supply Bypassing and Grounding Chip Information TRANSISTOR COUNT: 2,058 ...

Page 15

Low-Power, 2-Channel, 108ksps, ________________________________________________________Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Serial 12-Bit ADCs in 8-Pin µMAX 15 ...

Page 16

... 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. 16 _________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products ...

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