MAX1204BEAP+ Maxim Integrated Products, MAX1204BEAP+ Datasheet

IC ADC 10BIT 8CH 20-SSOP

MAX1204BEAP+

Manufacturer Part Number
MAX1204BEAP+
Description
IC ADC 10BIT 8CH 20-SSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1204BEAP+

Number Of Bits
10
Sampling Rate (per Second)
133k
Data Interface
MICROWIRE™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
640mW
Voltage Supply Source
Dual ±
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SSOP
Number Of Adc Inputs
8
Architecture
SAR
Conversion Rate
133 KSPs
Resolution
10 bit
Input Type
Voltage
Interface Type
Serial
Voltage Reference
Internal 4.096 V or External
Supply Voltage (max)
5 V
Maximum Power Dissipation
640 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1204 is a 10-bit data-acquisition system
specifically designed for use in applications with mixed
+5V (analog) and +3V (digital) supply voltages. It oper-
ates with a single +5V analog supply or dual ±5V ana-
log supplies, and combines an 8-channel multiplexer,
internal track/hold, and serial interface with high con-
version speed and low power consumption.
A 4-wire serial interface connects directly to
SPI™/Microwire™ devices without external logic, and a
serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1204
uses either the internal clock or an external serial-
interface clock to perform successive-approximation
analog-to-digital conversions. The serial interface oper-
ates at up to 2MHz.
The MAX1204 features an internal 4.096V reference and
a reference-buffer amplifier that simplifies gain trim. It
also has a VL pin that supplies power to the digital out-
puts. Output logic levels (3V, 3.3V, or 5V) are determined
by the value of the voltage applied to this pin.
A hard-wired SHDN pin and two software-selectable
power-down modes are provided. Accessing the serial
interface automatically powers up the device. A quick
turn-on time allows the MAX1204 to be shut down
between conversions, enabling the user to optimize
supply currents. By customizing power-down between
conversions, supply current can drop below 10µA at
reduced sampling rates.
The MAX1204 is available in 20-pin SSOP and DIP
packages, and is specified for the commercial, extend-
ed, and military temperature ranges.
________________________Applications
19-1179; Rev 0; 1/97
SPI is a registered trademark of Motorola, Inc.
Microwire is a registered trademark of National Semiconductor Corp.
Typical Operating Circuit appears on last page.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_______________General Description
5V/3V Mixed-Supply Systems
Data Acquisition
Process Control
Battery-Powered Instruments
Medical Instruments
________________________________________________________________ Maxim Integrated Products
5V, 8-Channel, Serial, 10-Bit ADC
with 3V Digital Interface
____________________________Features
Ordering Information continued at end of data sheet.
MAX1204ACPP
MAX1204BCPP
MAX1204ACAP
MAX1204BCAP
__________________Pin Configuration
______________Ordering Information
8-Channel Single-Ended or 4-Channel
Differential Inputs
Operates from +5V Single or ±5V Dual Supplies
User-Adjustable Output Logic Levels
(2.7V to 5.25V)
Low Power: 1.5mA (operating mode)
Internal Track/Hold, 133kHz Sampling Rate
Internal 4.096V Reference
SPI/Microwire/TMS320-Compatible
4-Wire Serial Interface
Software-Configurable Unipolar/Bipolar Inputs
20-Pin DIP/SSOP
Pin-Compatible 12-Bit Upgrade: MAX1202
TOP VIEW
PART
SHDN
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
V
2µA (power-down mode)
SS
TEMP. RANGE PIN-PACKAGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
10
1
2
3
4
5
6
7
8
9
DIP/SSOP
MAX1204
20 Plastic DIP
20 Plastic DIP
20 SSOP
20 SSOP
19
18
17
16
15
14
13
12
11
20
V
SCLK
CS
DIN
SSTRB
DOUT
VL
GND
REFADJ
REF
DD
(LSB)
±1/2
±1
±1/2
±1
INL
1

Related parts for MAX1204BEAP+

MAX1204BEAP+ Summary of contents

Page 1

... Typical Operating Circuit appears on last page. SPI is a registered trademark of Motorola, Inc. Microwire is a registered 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 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface ...

Page 2

Serial, 10-Bit ADC with 3V Digital Interface ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. ...............................................................-0. GND...............................................................+0. ..............................................................-0.3V to +12V DD SS CH0–CH7 to GND ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5V ±5 2.7V to 3.6V cycle (133ksps); 4.7µF capacitor at REF; T PARAMETER SYMBOL CONVERSION RATE Conversion Time (Note 5) Track/Hold Acquisition Time Aperture Delay Aperture Jitter Internal Clock Frequency External ...

Page 4

Serial, 10-Bit ADC with 3V Digital Interface ELECTRICAL CHARACTERISTICS (continued +5V ±5 2.7V to 3.6V cycle (133ksps); 4.7µF capacitor at REF; T PARAMETER SYMBOL EXTERNAL REFERENCE AT REFADJ Capacitive Bypass at ...

Page 5

ELECTRICAL CHARACTERISTICS (V = +5V ±5 2.7V to 5.25V cycle (133ksps); 4.7µF capacitor at REF; T PARAMETER SYMBOL CS SHDN , DIGITAL INPUTS: DIN, SCLK, DIN, SCLK, CS Input High Voltage DIN, SCLK, CS Input Low ...

Page 6

Serial, 10-Bit ADC with 3V Digital Interface TIMING CHARACTERISTICS (V = +5V ±5 2.7V to 3.6V PARAMETER SYMBOL Acquisition Time DIN to SCLK Setup DIN to SCLK Hold SCLK Fall to Output Data ...

Page 7

Operating Characteristics ( ±5 2.7V to 3.6V SCLK 4.7µF capacitor at REF +25°C; unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.0 1.8 1.6 1.4 1.2 1.0 4.5 4.7 4.9 ...

Page 8

Serial, 10-Bit ADC with 3V Digital Interface DOUT DOUT 3k C LOAD GND a. High and High Figure 1. Load Circuits for Enable Time DOUT DOUT 3k ...

Page 9

The T/H enters tracking mode on the falling clock edge after the fifth bit of the 8-bit control word is shifted in. The T/H enters hold mode on the falling clock edge after the eighth bit of the control word ...

Page 10

Serial, 10-Bit ADC with 3V Digital Interface Table 1a. Unipolar Full Scale and Zero Scale ZERO REFERENCE SCALE Internal 0V at REFADJ 0V External at REF 0V Input Bandwidth The ADC’s input tracking circuitry has a 4.5MHz small-signal ...

Page 11

Table 2. Control-Byte Format Bit 7 Bit 6 (MSB) START SEL 2 Bit Name The first logic 1 bit after CS goes low defines the beginning of the control byte. 7 (MSB) START 6 SEL2 These three bits select which ...

Page 12

Serial, 10-Bit ADC with 3V Digital Interface Simple Software Interface Make sure the CPU’s serial interface runs in master mode so the CPU generates the serial clock. Choose a clock frequency from 100kHz to 2MHz. 1) Set up ...

Page 13

CS SCLK 1 4 UNI/ SGL/ DIN SEL2 SEL1 SEL0 DIF PD1 PD0 BIP START SSTRB RB1 DOUT ACQUISITION IDLE ADC STATE (SCLK = 2MHz) Figure 6. 24-Bit External-Clock-Mode Conversion Timing (Microwire/SPI Compatible CSS t CSH SCLK t ...

Page 14

Serial, 10-Bit ADC with 3V Digital Interface CS SCLK SEL2 SEL1 SEL0 UNI/ DIN DIP START SSTRB DOUT IDLE ADC STATE Figure 9. Internal Clock Mode Timing CS t CSH SSTRB SCLK PD0 ...

Page 15

CS 1 SCLK DIN S CONTROL BYTE 0 DOUT SSTRB Figure 11a. External Clock Mode, 15 Clocks/Conversion Timing CS SCLK S CONTROL BYTE 0 DIN DOUT Figure 11b. External Clock Mode, 16 Clocks/Conversion Timing __________ Applications Information When power is ...

Page 16

Serial, 10-Bit ADC with 3V Digital Interface shut down the converter completely. SHDN overrides bits 1 and 0 of the control byte. Full power-down mode turns off all chip functions that draw quiescent current, reducing I cally to ...

Page 17

CLOCK INTERNAL MODE SHDN SETS EXTERNAL CLOCK MODE DIN DOUT DATA VALID ( DATA BITS) MODE POWERED UP Figure 12a. Timing Diagram for Power-Down Modes (External Clock) CLOCK MODE SETS ...

Page 18

Serial, 10-Bit ADC with 3V Digital Interface Lowest Power at Higher Throughputs Figure 14b shows power consumption with external- reference compensation in fast power-down, with one and eight channels converted. The external 4.7µF compensa- tion requires a 50µs ...

Page 19

FULL POWER-DOWN 1000 2ms FASTPD WAIT 400kHz EXTERNAL CLOCK INTERNAL COMPENSATION 100 100 150 200 250 300 CONVERSIONS PER CHANNEL PER SECOND Figure 14a. MAX1204 Supply Current vs. Sample Rate/Second, FULLPD, 400kHz Clock FAST POWER-DOWN 10,000 ...

Page 20

Serial, 10-Bit ADC with 3V Digital Interface OUTPUT CODE FULL-SCALE TRANSITION 111 110 101 011 010 00 . ...

Page 21

TMS320CL3x to MAX1204 Interface Figure 19 shows an application circuit to interface the MAX1204 to the TMS320 in external clock mode. Figure 20 is the timing diagram for this interface circuit. Use the following steps to initiate a conversion in ...

Page 22

Serial, 10-Bit ADC with 3V Digital Interface _Ordering Information (continued) PART TEMP. RANGE PIN-PACKAGE MAX1204AEPP -40°C to +85°C 20 Plastic DIP MAX1204BEPP -40°C to +85°C 20 Plastic DIP MAX1204AEAP -40°C to +85°C 20 SSOP MAX1204BEAP -40°C to +85°C ...

Page 23

Information ______________________________________________________________________________________ 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface SSOP SHRINK SMALL-OUTLINE PACKAGE ...

Page 24

... 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. 24 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1997 Maxim Integrated Products ...

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