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PDF DAC8871 Data sheet ( Hoja de datos )
| Número de pieza | DAC8871 | |
| Descripción | Serial Interface DIGITAL-TO-ANALOG CONVERTER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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BurrĆBrown Products
from Texas Instruments
DAC8871
DAC8871
SBAS396 – JUNE 2007
16-Bit, Single-Channel, ±18V Output (Unbuffered), Ultra-Low Power, Serial Interface
DIGITAL-TO-ANALOG CONVERTER
FEATURES
• 16-Bit Resolution
• Output: ±18V for ±18V Reference Input
• ±18V Supply Operation
• Very Low Power
• High Accuracy INL: 1LSB
• Low Noise: 10nV/√Hz
• Fast Settling: 1µs to 1LSB
• Fast SPI™ Interface: Up To 50MHz
• 16-Pin TSSOP Package
• Selectable Reset to Zero or Midscale
APPLICATIONS
• Portable Equipment
• Automatic Test Equipment
• Industrial Process Control
• Data Acquisition Systems
• Optical Networking
DESCRIPTION
The DAC8871 is a 16-bit, single-channel, serial
input, voltage output digital-to-analog converter
(DAC). The output range is determined by the
reference voltage, VREFH and VREFL. By properly
selecting the reference, the output can be unipolar or
bipolar, and up to ±18V. These converters provide
excellent linearity (1LSB INL), low noise, and fast
settling (1µs to 1LSB of full scale output) over the
specified temperature range of –40°C to +105°C.
The output is unbuffered, which reduces the power
consumption and the error introduced by the buffer.
The device features a standard high-speed clock (up
to 50MHz), and a 3V or 5V SPI serial interface to
communicate with the DSP or microprocessors.
For optimum performance, a set of Kelvin
connections to external reference are provided. The
DAC8871 is available in a TSSOP-16 package.
VSS VCC VDD DGND VREFH-S VREFH-F VREFL-F VREFL-S
RSTSEL
RST
LDAC
Control
Logic
CS
SCLK
SDI
Serial
Interface
Input
Data
Register
DAC
VOUT
DAC
Latch
AGND
DAC8871
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TI DSP is a trademark of Texas Instruments.
SPI, QSPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated
1 page  
DAC8871
www.ti.com
PIN CONFIGURATION (NOT TO SCALE)
PW PACKAGE
TSSOP-16
(TOP VIEW)
VOUT 1
VCC 2
VSS 3
AGND 4
VREFH-F 5
VREFH-S 6
VREFL-S 7
VREFL-F 8
DAC8871
16 DGND
15 LDAC
14 SDI
13 SCLK
12 CS
11 RST
10 RSTSEL
9 VDD
SBAS396 – JUNE 2007
TERMINAL FUNCTIONS
TERMINAL
NO. NAME
1 VOUT
2 VCC
3 VSS
4 AGND
5 VREFH-F
6 VREFH-S
7 VREFL-S
8 VREFL-F
9 VDD
10 RSTSEL
11 RST
12 CS
13 SCLK
14 SDI
15 LDAC
16 DGND
DESCRIPTION
Analog output of the DAC
Positive analog power supply: +15V
Negative analog power supply: –15V
Analog ground
VREFH reference input (Force). Connect to external VREFH.
VREFH reference input (Sense). Connect to external VREFH.
VREFL reference input (Sense). Connect to external VREFL.
VREFL reference input (Force). Connect to external VREFL.
Digital power. +5V for 5V interface logic; +3V for 3V logic.
Power-On-Reset select. Determines VOUT after power-on reset. If tied to VDD, the DAC latch is set to mid-scale
after power-on, and VOUT is (VREFH– VREFL)/2. If tied to DGND, the DAC latch is cleared ('0'), and VOUT is VREFL.
Reset (active low)
Chip select input (active low). Data are not clocked into SDI unless CS is low.
Serial clock input
Serial data input. Data are latched into input register on the rising edge of SCLK.
Load DAC control input (active low). When LDAC is low, the DAC latch is simultaneously updated with the content
of the input register.
Digital ground
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5
5 Page 
DAC8871
www.ti.com
SBAS396 – JUNE 2007
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, VDD = +5V, VCC = +15V, VSS = –15V, VREFH = +10V, and VREFL =–10V, unless otherwise noted.
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
12
INTEGRAL NONLINEARITY ERROR
vs ANALOG SUPPLY VOLTAGE
13 14 15 16 17
±Supply (V)
Figure 21.
18
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
12
DIFFERENTIAL NONLINEARITY ERROR
vs ANALOG SUPPLY VOLTAGE
13 14 15 16 17
±Supply (V)
Figure 22.
18
GAIN ERROR
vs TEMPERATURE
1.00
0.75
0.50
0.25
0
VCC = 15V
VSS = -15V
VREFH = 10V
VREFL = 0V
VCC = 15V
VSS = 0V
VREFH = 10V
VREFL = 0V
-0.25
-0.50
-0.75
VCC = 15V
VSS = -15V
VREF = ±10V
-1.00
-60 -40 -20
0 20 40 60 80 100 120 140
Temperature (°C)
Figure 23.
ZERO-CODE ERROR
vs TEMPERATURE
0.5
Unipolar Mode
0.4 VCC = 15V
0.3 VSS = -15V
0.2 VREFH = 10V
VREFL = 0V
0.1
Bipolar Mode
VCC = 15V
VSS = -15V
VREF = ±10V
0
-0.1
-0.2
-0.3
-0.4
Unipolar Mode (Single Supply)
VCC = 15V VREFH = 10V
VSS = 0V VREFL = 0V
-0.5
-60 -40 -20 0 20 40 60
Temperature (°C)
80
100 120 140
Figure 24.
0
-0.25
BIPOLAR ZERO ERROR
vs TEMPERATURE
VCC = 15V
VSS = -15V
VREF = ±10V
Digital Input Code = 8000h
SUPPLY CURRENT
vs DIGITAL INPUT VOLTAGE
2.5
2.0
VDD = +5V
1.5
-0.50
-0.75
-60 -40 -20
0 20 40 60 80 100 120 140
Temperature (°C)
Figure 25.
1.0
0.5
VDD = +3V
0
01
23
Digital Input Voltage (V)
Figure 26.
4
5
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11
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| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet DAC8871.PDF ] | |
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