Datasheet

AD5689/AD5687 Data Sheet
Rev. 0 | Page 4 of 24
Parameter Min Typ Max Unit Test Conditions/Comments
LOGIC OUTPUTS (SDO)
2
Output Low Voltage (V
OL
) 0.4 V
I
SINK
= 200 μA
Output High Voltage (V
OH
) V
LOGIC
− 0.4 V
I
SOURCE
= 200 μA
Floating State Output Capacitance 4 pF
POWER REQUIREMENTS
V
LOGIC
1.8 5.5 V
I
LOGIC
3
µA
V
DD
2.7 5.5 V Gain = 1
V
DD
V
REF
+ 1.5 5.5 V Gain = 2
I
DD
V
IH
= V
DD
, V
IL
= GND, V
DD
= 2.7 V to 5.5 V
Normal Mode
7
0.59 0.7 mA
All Power-Down Modes
8
1 4 µA −40°C to +85°C
6 µA −40°C to +105°C
1
DC specifications tested with the outputs unloaded, unless otherwise noted. Upper dead band = 10 mV; it exists only when V
REF
= V
DD
with gain = 1 or when V
REF
/2 =
V
DD
with gain = 2. Linearity is calculated using a reduced code range of 256 to 65,280 (AD5689) and 12 to 4080 (AD5687).
2
Guaranteed by design and characterization; not production tested.
3
Channel A can have an output current of up to 30 mA. Similarly, Channel B can have an output current of up to 30 mA, up to a junction temperature of 110°C.
4
V
DD
= 5 V. The devices include current limiting that is intended to protect them during temporary overload conditions. Junction temperature may be exceeded during
current limit, but operation above the specified maximum operation junction temperature can impair device reliability.
5
When drawing a load current at either rail, the output voltage headroom, with respect to that rail, is limited by the 25 Ω typical channel resistance of the output
devices. For example, when sinking 1 mA, the minimum output voltage = 25 Ω × 1 mA = 25 mV (see
Figure 23).
6
Initial accuracy presolder reflow is ±750 µV; output voltage includes the effects of preconditioning drift.
7
Interface inactive. Both DACs active. DAC outputs unloaded.
8
Both DACs powered down.
AC CHARACTERISTICS
V
DD
= 2.7 V to 5.5 V; R
L
= 2 kΩ to GND; C
L
= 200 pF to GND; 1.8 V ≤ V
LOGIC
≤ 5.5 V; all specifications T
MIN
to T
MAX
, unless otherwise
noted. Temperature range = −40°C to +105°C, typical at 25°C. Guaranteed by design and characterization, not production tested.
Table 3.
Parameter
1
Min Typ Max Unit Test Conditions/Comments
Output Voltage Settling Time
AD5689 5 8 µs ¼ to ¾ scale settling to ±2 LSB
AD5687 5 7 µs ¼ to ¾ scale settling to ±2 LSB
Slew Rate 0.8 V/µs
Digital-to-Analog Glitch Impulse
0.5
nV-sec
1 LSB change around major carry
Digital Feedthrough 0.13 nV-sec
Digital Crosstalk 0.1 nV-sec
Analog Crosstalk 0.2 nV-sec
DAC-to-DAC Crosstalk 0.3 nV-sec
Total Harmonic Distortion (THD)
2
−80 dB At ambient, BW = 20 kHz, V
DD
= 5 V, f
OUT
= 1 kHz
Output Noise Spectral Density (NSD) 300 nV/√Hz DAC code = midscale, 10 kHz, gain = 2
Output Noise 6 µV p-p 0.1 Hz to 10 Hz
Signal-to-Noise Ratio (SNR) 90 dB At ambient, BW = 20 kHz, V
DD
= 5 V, f
OUT
= 1 kHz
Spurious Free Dynamic Range (SFDR) 83 dB At ambient, BW = 20 kHz, V
DD
= 5 V, f
OUT
= 1 kHz
Signal-to-Noise-and-Distortion Ratio
(SINAD)
80 dB At ambient, BW = 20 kHz, V
DD
= 5 V, f
OUT
= 1 kHz
1
See the Terminology section.
2
Digitally generated sine wave at 1 kHz.