Datasheet

4–4
4.3.6.3 DAC Signal-to-Distortion + Noise When Load is 600 Ω (see Note 5)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
I
= 0 dB 70 77
THD+N
Signal to total harmonic distortion + noise
V
I
= –3 dB 73 78
dB
THD+N Signal-to-total harmonic distortion + noise
V
I
= –9 dB
70 78
dB
V
I
= –40 dB 35 42
NOTE 5: The test condition is the digital equivalent of a 1020-Hz input signal with an 8-kHz conversion rate. The test is measured at output of
application schematic low-pass filter. The test is conducted in 16-bit mode.
4.3.7 DAC Channel Characteristics
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Dynamic range V
I
= 0 dB at 1020 Hz 82 dB
Interchannel isolation 100 dB
E
G
Gain error, 0 dB V
O
= 0 dB at 1020 Hz 0.5 dB
Idle channel narrow band noise 0 kHz to 4 kHz, See Note 6 25 70 µVrms
V
OO
Output offset voltage at OUT (differential) DIN = all zeros 30 mV
V
Analog output voltage
5 V
Differential with respect to common mode
–4 4
V
V
O
Analog output voltage
3.3 V
Differential
with
res ect
to
common
mode
and full-scale digital input
–2.5 2.5
V
Channel delay 18/f
s
NOTE 6: The conversion rate is 8 kHz.
4.3.8 Op-Amp Interface (A1, A3, A4)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
A
V
Gain 100
Input voltage range 0.5 AV
DD – 0.5
V
Input offset voltage 10 mV
Input offset current 0 mA
Output power 15 mW
SNR Signal-to-noise ratio Input frequency = 1020 Hz 90 dB
THD + N Signal-to-total harmonic distortion + noise Input frequency = 1020 Hz 90 dB
Unity-gain bandwidth Open loop 10 MHz
Noise output voltage 30 µVrms
4.3.9 Power-Supply Rejection (see Note 7)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
AV
DD
Supply-voltage rejection ratio, analog supply f
j
= 0 to f
s
/2 75 dB
DV
DD
Su
pp
ly voltage rejection ratio
DAC channel
f
j
=0to30kHz
95
dB
DV
DD
Supply-voltage rejection ratio
ADC channel
f
j
= 0 to 30 kHz
86
dB
NOTE 7: Power supply rejection measurements are made with both the ADC and the DAC channels idle and a 200-mV peak-to-peak signal
applied to the appropriate supply.