Datasheet

AD7877 Data Sheet
Rev. D | Page 4 of 44
Parameter Min Typ Max Unit Test Conditions/Comments
DAC
Resolution 8 Bits
Integral Nonlinearity ±1 Bits
Differential Nonlinearity ±1 Guaranteed monotonic by design
Voltage Mode
Output Voltage Range 0 − V
CC
/2 V DAC register Bit 2 = 0, Bit 0 = 0
0 − V
CC
V DAC register Bit 2 = 0, Bit 0 = 1
Slew Rate −0.4, +0.5 V/µs
Output Settling Time 12 15 µs 0 to 3/4 scale, R
LOAD
= 10 kΩ, C
LOAD
= 50 pF
Capacitive Load Stability 50 100 pF R
LOAD
= 10 kΩ
Output Impedance
75
kΩ
Power-down mode
Short-Circuit Current 21 mA
Current Mode
Output Current Range 0 1000 µA DAC register, Bit 2 = 1; full-scale current is set by R
RNG
Output Impedance Open Power-down mode
LOGIC INPUTS
Input High Voltage, V
INH
0.7 V
DRIVE
V
Input Low Voltage, V
INL
0.3
V
DRIVE
V
Input Current, I
IN
±1 µA Typically 10 nA, V
IN
= 0 V or V
CC
Input Capacitance, C
IN
4
10 pF
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DRIVE
− 0.2 V I
SOURCE
= 250 µA, V
CC
/V
DRIVE
= 2.7 V to 5.25 V
Output Low Voltage, V
OL
0.4 V I
SINK
= 250 µA
Floating-State Leakage Current ±10 µA
Floating-State Output Capacitance
4
10 pF
Output Coding
Straight (natural) binary
CONVERSION RATE
Conversion Time 8 µs
CS high to DAV low
Throughput Rate 125 kSPS
POWER REQUIREMENTS
V
CC
(Specified Performance) 2.7 3.6 V Functional from 2.2 V to 5.25 V
V
DRIVE
1.65 V
CC
V
I
CC
Digital inputs = 0 V or V
CC
Converting Mode 240 380 µA ADC on, internal reference off, V
CC
= 3.6 V
650 900 µA ADC on, internal reference on, V
CC
= 3.6 V
900 µA ADC on, internal reference on, DAC on
Static
150
µA
ADC on, but not converting, internal reference off,
V
CC
= 3.6 V
Shutdown Mode 1 µA
1
See the Terminology section.
2
Difference between Temp0 and Temp1 measurement. No calibration necessary.
3
Temperature drift is −2.1 mV/°C.
4
Sample tested @ 25°C to ensure compliance.