MAX1113EPE+ Maxim Integrated Products, MAX1113EPE+ Datasheet

IC ADC 8BIT LP 16-DIP

MAX1113EPE+

Manufacturer Part Number
MAX1113EPE+
Description
IC ADC 8BIT LP 16-DIP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1113EPE+

Number Of Bits
8
Sampling Rate (per Second)
50k
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
680µW
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1112/MAX1113 are low-power, 8-bit, 8-chan-
nel analog-to-digital converters (ADCs) that feature an
internal track/hold, voltage reference, clock, and serial
interface. They operate from a single +4.5V to +5.5V
supply and consume only 135µA while sampling at
rates up to 50ksps. The MAX1112’s 8 analog inputs
and the MAX1113’s 4 analog inputs are software-con-
figurable, allowing unipolar/bipolar and single-
ended/differential operation.
Successive-approximation conversions are performed
using either the internal clock or an external serial-inter-
face clock. The full-scale analog input range is deter-
mined by the 4.096V internal reference, or by an
externally applied reference ranging from 1V to V
The 4-wire serial interface is compatible with the SPI™,
QSPI™, and MICROWIRE™ serial-interface standards.
A serial-strobe output provides the end-of-conversion
signal for interrupt-driven processors.
The MAX1112/MAX1113 have a software-program-
mable, 2µA automatic power-down mode to minimize
power consumption. Using power-down, the supply
current is reduced to 13µA at 1ksps, and only 82µA at
10ksps. Power-down can also be controlled using the
SHDN input pin. Accessing the serial interface automat-
ically powers up the device.
The MAX1112 is available in 20-pin SSOP and DIP
packages. The MAX1113 is available in small 16-pin
QSOP and DIP packages.
Pin Configurations appear at end of data sheet.
________________________Applications
19-1231; Rev 1; 10/98
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Portable Data Logging
Hand-Held Measurement Devices
Medical Instruments
System Diagnostics
Solar-Powered Remote Systems
4–20mA-Powered Remote
Data-Acquisition Systems
________________________________________________________________ Maxim Integrated Products
General Description
+5V, Low-Power, Multi-Channel,
DD
.
*
Ordering Information continued at end of data sheet.
____________________________Features
REFOUT
Dice are specified at T
MAX1112CPP
MAX1112CAP
MAX1112C/D
SHDN
REFIN
SCLK
CH4*
CH5*
CH6*
CH7*
COM
*MAX1112 ONLY
+4.5V to +5.5V Single Supply
Low Power: 135µA at 50ksps
8-Channel Single-Ended or 4-Channel Differential
Inputs (MAX1112)
4-Channel Single-Ended or 2-Channel Differential
Inputs (MAX1113)
Internal Track/Hold; 50kHz Sampling Rate
Internal 4.096V Reference
SPI/QSPI/MICROWIRE-Compatible Serial Interface
Software-Configurable Unipolar or Bipolar Inputs
Total Unadjusted Error: ±1LSB (max)
CH0
CH1
CH2
CH3
DIN
CS
PART
REGISTER
ANALOG
INPUT
SHIFT
INPUT
MUX
Serial 8-Bit ADCs
13µA at 1ksps
REFERENCE
+4.096V
TEMP. RANGE
A
0°C to +70°C
0°C to +70°C
0°C to +70°C
= +25°C, DC parameters only.
Ordering Information
CONTROL
T/H
LOGIC
Functional Diagram
±0.3LSB (typ)
IN
CLOCK
SAR ADC
CLOCK
8-BIT
INT
REF
OUT
20 Plastic DIP
20 SSOP
Dice*
PIN-PACKAGE
MAX1112
MAX1113
REGISTER
OUTPUT
SHIFT
DOUT
SSTRB
V
DGND
AGND
DD
1

Related parts for MAX1113EPE+

MAX1113EPE+ Summary of contents

Page 1

... Pin Configurations appear at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. +5V, Low-Power, Multi-Channel, ...

Page 2

Low-Power, Multi-Channel, Serial 8-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to AGND ..............................................................-0. AGND to DGND .......................................................-0.3V to 0.3V CH0–CH7, COM, REFIN, REFOUT to AGND ...................................-0. Digital Inputs to DGND ...............................................-0. Digital Outputs ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +4.5V to +5.5V; unipolar input mode; COM = 0V cycle (50ksps); 1µF capacitor at REFOUT; T PARAMETER SYMBOL CONVERSION RATE Conversion Time (Note 4) Track/Hold Acquisition Time Aperture Delay Aperture Jitter Internal Clock ...

Page 4

Low-Power, Multi-Channel, Serial 8-Bit ADCs ELECTRICAL CHARACTERISTICS (continued +4.5V to +5.5V; unipolar input mode; COM = 0V cycle (50ksps); 1µF capacitor at REFOUT; T PARAMETER SYMBOL CS DIGITAL INPUTS: DIN, SCLK, DIN, SCLK, CS Input ...

Page 5

TIMING CHARACTERISTICS (Figures 8 and +4.5V to +5.5V MIN MAX PARAMETER SYMBOL Track/Hold Acquisition Time DIN to SCLK Setup DIN to SCLK Hold SCLK Fall to Output Data Valid CS ...

Page 6

Low-Power, Multi-Channel, Serial 8-Bit ADCs __________________________________________Typical Operating Characteristics (V = +5.0V 500kHz; external clock (50% duty cycle SCLK SUPPLY CURRENT vs. TEMPERATURE 180 OUTPUT CODE = FULL SCALE C = 10pF LOAD 160 V = ...

Page 7

PIN NAME MAX1112 MAX1113 1–4 1–4 CH0–CH3 5–8 — CH4–CH7 9 5 COM SHDN REFIN 12 8 REFOUT 13 9 AGND 14 10 DGND 15 11 DOUT 16 12 SSTRB 17 13 DIN ...

Page 8

Low-Power, Multi-Channel, Serial 8-Bit ADCs _______________Detailed Description The MAX1112/MAX1113 analog-to-digital converters (ADCs) use a successive-approximation conversion technique and input track/hold (T/H) circuitry to convert an analog signal to an 8-bit digital output. A flexible seri- al interface provides easy ...

Page 9

Table 1a. MAX1112 Channel Selection in Single-Ended Mode (SGL/DIF = 1) SEL2 SEL1 SEL0 CH0 ...

Page 10

Low-Power, Multi-Channel, Serial 8-Bit ADCs The time required for the T/H to acquire an input signal is a function of how quickly its input capacitance is charged. If the input signal’s source impedance is high, the acquisition time lengthens, ...

Page 11

Table 4. Full-Scale and Zero-Scale Voltages UNIPOLAR MODE Full Scale Zero Scale V + COM COM REFIN in control bytes of $FF (hex), which trigger single- ended, unipolar conversions on CH7 (MAX1112) or CH3 (MAX1113) in external clock mode without ...

Page 12

Low-Power, Multi-Channel, Serial 8-Bit ADCs I/O SCK MISO + SPI CS SCK MISO + QSPI I MICROWIRE Figure 6. Common Serial-Interface Connections to the MAX1112/MAX1113 SCLK SEL2 SEL1 SEL0 ...

Page 13

In unipolar input mode, the output is straight binary (Figure 15). For bipolar inputs, the output is two’s-com- plement (Figure 16). Data is clocked out at SCLK’s falling edge in MSB-first format. The MAX1112/MAX1113 can use either an external ser- ...

Page 14

Low-Power, Multi-Channel, Serial 8-Bit ADCs SCLK UNI/ SEL2 SEL1 SEL0 BIP DIN START SSTRB DOUT A/D STATE IDLE Figure 10. Internal Clock Mode Timing CS t CSH SSTRB SCLK PD0 CLOCK IN Figure ...

Page 15

CS 1 SCLK DIN S CONTROL BYTE 0 DOUT SSTRB Figure 12a. Continuous Conversions, External Clock Mode, 10 Clocks/Conversion Timing CS SCLK S CONTROL BYTE 0 DIN DOUT Figure 12b. Continuous Conversions, External Clock Mode, 16 Clocks/Conversion Timing The falling ...

Page 16

Low-Power, Multi-Channel, Serial 8-Bit ADCs __________Applications Information Power-On Reset When power is first applied, and if SHDN is not pulled low, internal power-on reset circuitry activates the MAX1112/MAX1113 in internal clock mode. SSTRB is high on power-up and, if ...

Page 17

CLOCK INTERNAL MODE SHDN SETS EXTERNAL CLOCK MODE DIN DATA VALID DOUT POWERED UP MODE Figure 14a. Power-Down Modes, External Clock Timing Diagram SETS INTERNAL CLOCK MODE ...

Page 18

Low-Power, Multi-Channel, Serial 8-Bit ADCs OUTPUT CODE FULL-SCALE TRANSITION 11111111 11111110 11111101 00000011 00000010 00000001 00000000 (COM) INPUT VOLTAGE (LSB) Figure 15. Unipolar Transfer Function OUTPUT CODE V REFIN + COM 2 01111111 ...

Page 19

TOP VIEW CH0 1 CH1 2 CH2 3 CH3 4 MAX1112 CH4 5 CH5 6 CH6 7 CH7 8 COM 9 SHDN 10 DIP/SSOP Ordering Information (continued) PART TEMP. RANGE MAX1112EPP -40°C to +85°C MAX1112EAP -40°C to +85°C MAX1112MJP -55°C ...

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 © 1998 Maxim Integrated Products Printed USA ...

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