Datasheet

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Amplifier Selection
DAC7811
SBAS337C – APRIL 2005 – REVISED JULY 2007
There are many choices and many differences in selecting the proper operational amplifier for a multiplying DAC
(MDAC). Making the analog signal out of the MDAC is one critical aspect. However, there are also other issues
to take into account such as amplifier noise, input bias current, and offset voltage, as well as MDAC resolution
and glitch energy. Table 3 and Table 4 suggest some suitable operational amplifiers for low power, fast settling,
and high-speed applications. A greater selection of operational amplifiers can be found at www.ti.com/amplifer .
Table 3. Suitable Precision Operational Amplifiers from Texas Instruments
I
Q
TOTAL TOTAL PER SLEW OFFSET
SUPPLY SUPPLY CHANNEL GBW RATE DRIFT I
IB
CMRR
VOLTAGE VOLTAGE (max) (typ) (typ) (typ) (max) (min) PACKAGE/
PRODUCT (V) (min) (V) (max) (mA) (MHz) (V/ μ s) ( μ V/ ° C) (pA) (dB) LEAD DESCRIPTION
Low Power
SOT5-23,
12V, CMOS, Rail-to-Rail I/O,
OPA703 4 12 0.2 1 0.6 4 10 70 PDIP-8,
Operational Amplifier
SOIC-8
0.05 μ V/ ° C (max),
SOT5-23, Single-Supply CMOS
OPA735 2.7 12 0.75 1.6 1.5 0.01 200 115
SOIC-8 Zero-Drift Series Operational
Amplifier
Low Power, Single-Supply,
SOT5-23,
Rail-To-Rail Operational
OPA344 2.7 5.5 0.25 1 1 2.5 10 80 PDIP-8,
Amplifiers MicroAmplifier
SOIC-8
Series
SC5-70,
1MHz, 45 μ A, Rail-to-Rail I/O,
OPA348 2.1 5.5 0.065 1 0.5 2 10 70 SOT5-23,
Single Op Amp
SOIC-8
PDIP-8,
High Precision Operational
OPA277 4 36 0.825 1 0.8 0.1 1000 130 SOIC-8,
Amplifiers
SON-8
Fast Settling
High-Speed, Single-Supply,
MSOP-8,
Rail-to-Rail Operational
OPA350 2.7 5.5 7.5 38 22 4 10 76 PDIP-8,
Amplifiers MicroAmplifier
SOIC-8
Series
e-trim 20MHz, High
MSOP-8,
OPA727 4 12 6.5 20 30 0.6 500 86 Precision CMOS Operational
SON-8
Amplifier
PDIP-8, High Precision, Low Noise
OPA227 5 36 3.8 8 2.3 0.1 10000 120
SOIC-8 Operational Amplifiers
14
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