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Z
O
+
R1ȀR3(R1 ) R2)
R1(R2Ȁ ) R3Ȁ) * R1Ȁ(R2 ) R3)
(4)
Cross-Reference
DAC8801
SLAS403B – NOVEMBER 2004 – REVISED FEBRUARY 2007
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 :
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.
The DAC8801 has an industry-standard pinout. Table 2 provides the cross-reference information.
Table 2. Cross Reference
SPECIFIED
INL DNL TEMPERATURE PACKAGE PACKAGE CROSS
PRODUCT (LSB) (LSB) RANGE DESCIPTION OPTION REFERENCE
DAC8801IDGK ± 1 ± 1 -40 ° C to +85 ° C 8-Lead MicroSOIC MSOP-8 ADS5553CRM
DAC8801IDRB ± 1 ± 1 -40 ° C to +85 ° C 8-Lead Small Outline SON-8 N/A
Table 3. DAC8801 Revision History
Revision Date Description
A 12/04 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.
B 10/06 Changed the ESD rating, HBM from 1500 to 4000 in the Absolute Maximum Ratings.
Revised Figure 8 .
12
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