Datasheet

AD7538
Rev. B | Page 4 of 16
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for design guidance only and are not subject to test. V
DD
= 11.4 V to 15.75 V, V
REF
= 10 V, V
PIN3
= V
PIN4
=
0 V, V
SS
= 0 V or −300 mV, output amplifier is AD711 except where noted.
Table 2.
Parameter
T
A
= 25°C
T
A
= T
MIN
, T
MAX
Unit Test Conditions/Comments
Output Current Settling Time 1.5 μs max To 0.003% of full-scale range
I
OUT
load= 100 Ω, C
EXT
= 13 pF DAC register alternately loaded
with all 1s and all 0s; typical value of settling time is 0.8 μs
Digital-to-Analog Glitch Impulse 20 nV-sec typ
Measured with V
REF
= 0 V. I
OUT
load = 100 Ω, C
EXT
= 13 pF; DAC
register alternately loaded with all 1s and all 0s
Multiplying Feedthrough Error 3 5 mV p-p typ V
REF
= ±10 V, 10 kHz sine wave DAC
Register loaded with all 0s
Power Supply Rejection
ΔGain/ΔV
DD
±0.01 ±0.02 % per % max ΔV
DD
= ±5%
Output Capacitance
C
OUT
(Pin 3) 260 260 pF max DAC register loaded with all 1s
C
OUT
(Pin 3) 130 130 pF max DAC register loaded with all 0s
Output Noise Voltage Density
(10 Hz to 100 kHz) 15 nV√Hz typ Measured between R
FB
and I
OUT
TIMING CHARACTERISTICS
V
DD
= 11.4 V to 15.75 V, V
REF
= 10 V, V
PIN3
= V
PIN4
= 0 V, V
SS
= 0 V or −300 mV. All specifications T
MIN
to T
MAX
unless otherwise noted. See
Figure 2 for a timing diagram.
Table 3.
Parameter
1
Limit at
T
A
= +25°C
Limit at T
A
= 0°C to +70°C
T
A
= −25°C to +85°C
Limit at
T
A
= −55°C to +125°C
Unit Test Conditions/Comments
t
1
0 0 0 ns min
CS
to WR setup time
t
2
0 0 0 ns min
CS to WR hold time
t
3
170 200 240 ns min
LDAC
pulse width
t
4
170 200 240 ns min Write pulse width
t
5
140 160 180 ns min Data setup time
t
6
20 20 30 ns min Data hold time
1
Temperature range as follows: J, K Versions: 0°C to +70°C
A, B Versions: −25°C to +85°C
S, T Versions: −55°C to +125°C