DAC8801_16 Datasheet, PDF (12/22 Pages) Texas Instruments – 14-Bit, Serial Input Multiplying Digital-to-Analog Converter

DAC8801
SLAS403B – NOVEMBER 2004 – REVISED FEBRUARY 2007
www.ti.com
APPLICATION INFORMATION (continued)
The value of R3 in the previous equation can be reduced to increase the output current drive of U3. U3 can
drive ±20 mA in both directions with voltage compliance limited up to 15 V by the U3 voltage supply. Elimination
of the circuit compensation capacitor C1 in the circuit is not suggested because of the change in the output
impedance Z_O, according to Equation 4:
Z_O
+
R1(R2Ȁ
R1ȀR3(R1
) R3Ȁ) *
) R2)
R1Ȁ(R2
)
R3)
(4)
As shown in Equation 4, with matched resistors, Z_O is infinite and the circuit is optimum for use as a current
source. However, if unmatched resistors are used, Z_O is positive or negative with negative output impedance
being a potential cause of oscillation. Therefore, by incorporating C1 into the circuit, possible oscillation
problems are eliminated. The value of C1 can be determined for critical applications; however, for most
applications a value of several pF is suggested.
Cross-Reference
The DAC8801 has an industry-standard pinout. Table 2 provides the cross-reference information.
PRODUCT
DAC8801IDGK
DAC8801IDRB
INL
(LSB)
±1
±1
DNL
(LSB)
±1
±1
Table 2. Cross Reference
SPECIFIED
TEMPERATURE
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
DESCIPTION
8-Lead MicroSOIC
8-Lead Small Outline
PACKAGE
OPTION
MSOP-8
SON-8
CROSS
REFERENCE
ADS5553CRM
N/A
Revision
A
B
Table 3. DAC8801 Revision History
Date
12/04
10/06
Description
Removed the "Product Preview" label.
Added information to the Features.
Added Output leakage current Data = 0000h, T_A = T_MAX in the Electrical Characteristics table.
Added Input high voltage for 2.7 V and 5 V in the Electrical Characteristics table.
Changed the values of the Power Requirements and the AC characteristics in the Electrical Characteristics table.
Changed the ESD rating, HBM from 1500 to 4000 in the Absolute Maximum Ratings.
Revised Figure 8.
12
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