MAX5172 MAXIM [Maxim Integrated Products], MAX5172 Datasheet

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MAX5172

Manufacturer Part Number
MAX5172
Description
Low-Power, Serial, 14-Bit DACs with Voltage Output
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Part Number:
MAX5172AEEE
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX5170/MAX5172 low-power, serial, voltage-out-
put, 14-bit digital-to-analog converters (DACs) feature a
precision output amplifier in a space-saving 16-pin
QSOP package. The MAX5170 operates from a +5V
single supply and the MAX5172 operates from a +3V
single supply. Both devices draw only 280µA of supply
current, which reduces to 1µA in shutdown. In addition,
the programmable power-up reset feature allows for a
user-selectable power-up output voltage of either 0 or
midscale.
The 3-wire serial interface is compatible with SPI™,
QSPI™, and MICROWIRE™ standards. An input regis-
ter followed by a DAC register provides a double-
buffered input, allowing the input and DAC registers to
be updated independently or simultaneously with a 16-
bit serial word. Additional features include software and
hardware shutdown, shutdown lockout, a hardware
clear pin, and a reference input capable of accepting
DC and offset AC signals. These devices provide a pro-
grammable digital output pin for added functionality
and a serial-data output pin for daisy-chaining. All logic
inputs are TTL/CMOS-compatible and are internally
buffered with Schmitt triggers to allow direct interfacing
to optocouplers.
The MAX5170/MAX5172 incorporate a proprietary on-chip
circuit that keeps the output voltage virtually “glitch free,”
limiting the glitches to a few millivolts during power-up.
Both devices are available in 16-pin QSOP packages and
are specified for the extended (-40°C to +85°C) tempera-
ture range. For 100% pin-compatible DACS with internal
reference, see the 13-bit MAX5130/MAX5131 and the 12-
bit MAX5120/MAX5121 data sheets.
Functional Diagram appears at end of data sheet.
19-1478; Rev 0; 4/99
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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.
Industrial Process Controls
Digital Offset and Gain Adjustment
Motion Control
Automatic Test Equipment (ATE)
Remote Industrial Controls
µP-Controlled Systems
________________________________________________________________ Maxim Integrated Products
General Description
Applications
Low-Power, Serial, 14-Bit DACs
MAX5170AEEE
MAX5170BEEE
MAX5172AEEE
MAX5172BEEE
±1 LSB INL
1µA Shutdown Current
“Glitch Free” Output Voltage at Power-Up
Single-Supply Operation
Full-Scale Output Range
Rail-to-Rail
Adjustable Output Offset
Low THD (-80dB) in Multiplying Operation
SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
Programmable Shutdown Mode and Power-Up
Reset (0 or Midscale)
Buffered Output Capable of Driving 5kΩ || 100pF
Loads
User-Programmable Digital Output Pin Allows
Serial Control of External Components
Pin-Compatible Upgrade to the 12-Bit
MAX5174/MAX5176
TOP VIEW
PART
+5V (MAX5170)
+3V (MAX5172)
+2.048V (MAX5172, V
+4.096V (MAX5170, V
with Voltage Output
®
Output Amplifier
SCLK
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
OUT
CLR
PDL
DIN
OS
CS
RS
1
2
3
4
5
6
7
8
Ordering Information
MAX5170
MAX5172
QSOP
Pin Configuration
REF
REF
= +1.25V)
= +2.5V )
16 QSOP
16 QSOP
16 QSOP
16 QSOP
PIN-PACKAGE
16
15
14
13
12
11
10
9
SHDN
V
N.C.
REF
AGND
UPO
DOUT
DGND
DD
Features
(LSB)
INL
±1
±2
±2
±4
1

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MAX5172 Summary of contents

Page 1

... QSOP package. The MAX5170 operates from a +5V single supply and the MAX5172 operates from a +3V single supply. Both devices draw only 280µA of supply current, which reduces to 1µA in shutdown. In addition, ...

Page 2

Low-Power, Serial, 14-Bit DACs with Voltage Output ABSOLUTE MAXIMUM RATINGS V to AGND, DGND ............................................-0.3V to +6.0V DD AGND to DGND.....................................................-0.3V to +0.3V Digital Inputs to DGND..........................................-0.3V to +6.0V DOUT, UPO to DGND ................................-0. OUT, REF to AGND ...

Page 3

ELECTRICAL CHARACTERISTICS—MAX5170 (continued +5V ±10 2.5V AGND = DGND REF otherwise noted. Typical values are +25°C.) A PARAMETER SYMBOL DYNAMIC PERFORMANCE Voltage Output Slew Rate SR Output Settling Time ...

Page 4

... Low-Power, Serial, 14-Bit DACs with Voltage Output ELECTRICAL CHARACTERISTICS—MAX5172 (V = +2.7V to +3.6V 1.25V AGND = DGND REF otherwise noted. Typical values are +25°C). A PARAMETER SYMBOL STATIC PERFORMANCE Resolution Integral Nonlinearity (Note 5) INL Differential Nonlinearity DNL Offset Error (Note Gain Error ...

Page 5

... ELECTRICAL CHARACTERISTICS—MAX5172 (continued 2.7V to 3.6V 1.25V AGND = DGND REF otherwise noted. Typical values are +25°C). A PARAMETER SYMBOL DYNAMIC PERFORMANCE Voltage Output Slew Rate SR Output Settling Time Output Voltage Swing (Note 3) OS Pin Input Resistance Time Required to Exit Shutdown Digital Feedthrough ...

Page 6

... Low-Power, Serial, 14-Bit DACs with Voltage Output (MAX5170 +5V 2.5V; MAX5172 REF unless otherwise noted.) NO-LOAD SUPPLY CURRENT vs. SUPPLY VOLTAGE 330 320 310 300 290 280 270 260 250 240 230 4.4 4.6 4.8 5.0 5.2 5.4 5.6 SUPPLY VOLTAGE (V) OUTPUT VOLTAGE vs. TEMPERATURE 4.0970 4,0968 4.0966 4.0964 4.0962 4 ...

Page 7

... V = +5V 2.5V; MAX5172 REF unless otherwise noted.) FFT PLOT 1.25V + 1.13Vp- 10kHz REF OUT REF 12.5dB/div 20 100k FREQUENCY (Hz) REFERENCE INPUT FREQUENCY RESPONSE -10 -15 - 0.67V + 1.5V REF p-p DC -25 0 500 1000 1500 2000 FREQUENCY (kHz) NO-LOAD SUPPLY CURRENT vs ...

Page 8

... Low-Power, Serial, 14-Bit DACs with Voltage Output (MAX5170 +5V 2.5V; MAX5172 REF unless otherwise noted.) OUTPUT VOLTAGE vs. TEMPERATURE 2.0490 2.0488 2.0486 2.0484 2.0482 2.0480 -50 -30 - TEMPERATURE (°C) DYNAMIC RESPONSE MAX5170/72 toc21 3V/div 0 2.048V V OUT 500mV/div 10mV 2 s/div ...

Page 9

... V = +5V 2.5V; MAX5172 REF T = +25°C, unless otherwise noted.) A REFERENCE INPUT FREQUENCY RESPONSE -10 -15 - 0.67Vp-p + 0.75V REF DC -25 -30 0 500 1000 1500 FREQUENCY (kHz) PIN NAME 1 OS Offset Adjustment. Connect to AGND for no offset. 2 OUT Voltage Output. High impedance when in shutdown. The output voltage is limited to V Reset Mode Select (digital input) ...

Page 10

... The MAX5170/MAX5172’s offset adjust pin allows for a DC shift in the DAC output. The DACs are designed with an inverted R-2R ladder network (Figure 1) which pro- duces a weighted voltage proportional to the reference voltage ...

Page 11

... With CS low, data is clocked into the register on the rising edge of SCLK. The maximum serial clock frequency guaranteed for proper operation is 10MHz for MAX5170 and 6MHz for MAX5172. See Figure 5 for a detailed timing diagram of the serial interface. The serial-data output, DOUT, is the internal shift regis- ter’ ...

Page 12

... D02 D01 The MAX5170/MAX5172 offers a clear pin which resets the output voltage DGND, then CLR resets the output voltage to the minimum voltage ( AGND age to midscale. In either case, CLR resets UPO to its programmed default state. COMMAND EXECUTED ...

Page 13

... Applications Information Unipolar Output Figure 6 shows the MAX5170/MAX5172 configured for unipolar, rail-to-rail operation with a gain of +1.638V/V. Table 2 lists the codes for unipolar output voltages. The maximum output voltage is limited introduce an offset voltage as shown in Figure 7 and described in the Offset and Buffer Configurations section. ...

Page 14

... To set the gain of the output amplifier to 1, connect OS to OUT. Daisy-Chaining Devices The serial data output pin (DOUT) allows multiple MAX5170/MAX5172s to be daisy-chained together, as shown in Figure 9. The advantage of this is that only two lines are needed to control all the DACs on the line. The disadvantage is that it takes n commands to program the DACs ...

Page 15

... DIN SCLK CS1 CS2 CS3 CS MAX5170 MAX5172 SCLK DIN Figure 10. Multiple MAX5170/MAX5172s Sharing Common DIN and SCLK Lines +5V/ +3V +5V/+ MAX495 REFERENCE INPUT R REF 500mVp-p DAC MAX5170 MAX5172 AGND Figure 11. AC Reference Input Circuit ______________________________________________________________________________________ Low-Power, Serial, 14-Bit DACs with Voltage Output ...

Page 16

... SHDN RS CLR MAX5170 MAX5172 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 © ...

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