
AD8400/AD8402/AD8403
Rev. E | Page 7 of 32
Parameter
Symbol
Conditions
Min
Max
Unit
Bandwidth 3 dB
BW_50 K
R = 50 kΩ
125
kHz
BW_100 K
R = 100 kΩ
71
kHz
Total Harmonic Distortion
THDW
VA = 1 V rms + 2 V dc, VB = 2 V dc, f = 1 kHz
0.003
%
VW Settling Time
tS_50 K
VA = VDD, VB = 0 V, ±1% error band
9
μs
tS_100 K
VA = VDD, VB = 0 V, ±1% error band
18
μs
Resistor Noise Voltage
eNWB_50 K
RWB = 25 kΩ, f = 1 kHz, RS = 0
20
nV/√Hz
eNWB_100 K
RWB = 50 kΩ, f = 1 kHz, RS = 0
29
nV/√Hz
CT
VA = VDD, VB = 0 V
65
dB
1 Typicals represent average readings at 25°C and VDD = 5 V.
2 Resistor position nonlinearity error R-INL is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper
positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic. See the test circuit
in Figure 38.IW = VDD/R for VDD = 3 V or 5 V for the 50 kΩ and 100 kΩ versions.
3 VAB = VDD, wiper (VW) = no connect.
4 INL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. VA = VDD and VB = 0 V.
DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions. See the test circuit in
Figure 37.5 Resistor Terminal A, Resistor Terminal B, and Resistor Terminal W have no limitations on polarity with respect to each other.
6 Guaranteed by design and not subject to production test. Resistor-terminal capacitance tests are measured with 2.5 V bias on the measured terminal. The remaining
resistor terminals are left open circuit.
7 Measured at the Ax terminals. All Ax terminals are open-circuited in shutdown mode.
8 Worst-case supply current consumed when input logic level at 2.4 V, standard characteristic of CMOS logic. See Figure 28 for a plot of IDD vs. logic voltage. 9 PDISS is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation.
10 All dynamic characteristics use VDD = 5 V.
11 Measured at a VW pin where an adjacent VW pin is making a full-scale voltage change.