Datasheet

REV. B–2–
AD7528–SPECIFICATIONS
(V
REF
A = V
REF
B = +10 V; OUT A = OUT B = O V unless otherwise noted)
V
DD
= +5 V V
DD
= +15 V
Parameter Version
1
T
A
= +25°CT
MIN
, T
MAX
T
A
= +25°CT
MIN
, T
MAX
Units Test Conditions/Comments
STATIC PERFORMANCE
2
Resolution All 8 8 8 8 Bits
Relative Accuracy J, A, S ± 1 ±1 ±1 ±1 LSB max This is an Endpoint Linearity Specification
K, B, T ±1/2 ±1/2 ±1/2 ±1/2 LSB max
L, C, U ±1/2 ±1/2 ±1/2 ±1/2 LSB max
Differential Nonlinearity All ±1 ±1 ±1 ±1 LSB max All Grades Guaranteed Monotonic Over
Full Operating Temperature Range
Gain Error J, A, S ± 4 ±6 ± 4 ±5 LSB max Measured Using Internal R
FB
A and R
FB
B
K, B, T ±2 ±4 ±2 ±3 LSB max Both DAC Latches Loaded with 11111111
L, C, U ±1 ±3 ± 1 ± 1 LSB max Gain Error is Adjustable Using Circuits
of Figures 4 and 5
Gain Temperature Coefficient
3
∆Gain/∆Temperature All ± 0.007 ±0.007 ±0.0035 ±0.0035 %/°C max
Output Leakage Current
OUT A (Pin 2) All ±50 ±400 ±50 ±200 nA max DAC Latches Loaded with 00000000
OUT B (Pin 20) All ±50 ±400 ±50 ±200 nA max
Input Resistance (V
REF
A, V
REF
B) All 8 8 8 8 kΩ min Input Resistance TC = –300 ppm/°C, Typical
15 15 15 15 kΩ max Input Resistance is 11 kΩ
V
REF
A/V
REF
B Input Resistance
Match All ±1 ±1 ±1 ±1% max
DIGITAL INPUTS
4
Input High Voltage
V
IH
All 2.4 2.4 13.5 13.5 V min
Input Low Voltage
V
IL
All 0.8 0.8 1.5 1.5 V max
Input Current
I
IN
All ±1 ±10 ±1 ±10 µA max V
IN
= 0 or V
DD
Input Capacitance
DB0–DB7 All 10 10 10 10 pF max
WR, CS, DAC A/DAC B All 15 15 15 15 pF max
SWITCHING CHARACTERISTICS
3
See Timing Diagram
Chip Select to Write Set Up Time
t
CS
All 90 100 60 80 ns min
Chip Select to Write Hold Time
t
CH
All 0 0 10 15 ns min
DAC Select to Write Set Up Time
t
AS
All 90 100 60 80 ns min
DAC Select to Write Hold Time
t
AH
All 0 0 10 15 ns min
Data Valid to Write Set Up Time
t
DS
All 80 90 30 40 ns min
Data Valid to Write Hold Time
t
DH
All 0 0 0 0 ns min
Write Pulsewidth
t
WR
All 90 100 60 80 ns min
POWER SUPPLY See Figure 3
I
DD
All 2 2 2 2 mA max All Digital Inputs V
IL
or V
IH
All 100 500 100 500 µA max All Digital Inputs 0 V or V
DD
AC PERFORMANCE CHARACTERISTICS
5
V
DD
= +5 V V
DD
= +15 V
Parameter Version
1
T
A
= +25°CT
MIN
, T
MAX
T
A
= +25°CT
MIN
, T
MAX
Units Test Conditions/Comments
DC SUPPLY REJECTION (∆GAIN/∆V
DD
) All 0.02 0.04 0.01 0.02 % per % max ∆V
DD
= ±5%
CURRENT SETTLING TIME
2
All 350 400 180 200 ns max To 1/2 LSB. OUT A/OUT B Load = 100 Ω.
WR = CS = 0 V. DB0–DB7 = 0 V to V
DD
or
V
DD
to 0 V
PROPAGATION DELAY (From Digital In- V
REF
A = V
REF
B = +10 V
put to 90% of Final Analog Output Current) All 220 270 80 100 ns max OUT A, OUT B Load = 100 Ω C
EXT
= 13 pF
WR = CS = 0 V DB0–DB7 = 0 V to V
DD
or
V
DD
to 0 V
DIGITAL-TO-ANALOG GLITCH IMPULSE All 160 440 nV sec typ For Code Transition 00000000 to 11111111
OUTPUT CAPACITANCE
C
OUT
A All 50 50 50 50 pF max DAC Latches Loaded with 00000000
C
OUT
B 50 505050pF max
C
OUT
A 120 120 120 120 pF max DAC Latches Loaded with 11111111
C
OUT
B 120 120 120 120 pF max
AC FEEDTHROUGH
6
V
REF
A to OUT A All –70 –65 –70 –65 dB max V
REF
A, V
REF
B = 20 V p-p Sine Wave
V
REF
B to OUT B –70 –65 –70 –65 dB max @ 100 kHz
(Measured Using Recommended P.C. Board Layout (Figure 7) and AD644 as
Output Amplifiers)