AD7890AR-2 Analog Devices Inc, AD7890AR-2 Datasheet - Page 8

• Manufacturer Part Number: AD7890AR-2
• Description: A/D Converter (A-D) IC
• Manufacturer: Analog Devices Inc
• Type: Data Acquisition System (DAS)r

Specifications of AD7890AR-2

• No. Of Bits: 12 Bit
• No. Of Channels: 8
• Rohs Status: RoHS non-compliant
• Resolution (bits): 12 b
• Sampling Rate (per Second): 117k
• Data Interface: Serial
• Voltage Supply Source: Single Supply
• Voltage - Supply: 0 V ~ 2.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)

DSCC FORM 2234
APR 97
1/ V
2/ Full-scale error match applied to both positive and negative full scale.
3/ Subgroups 9, 10, and 11 are tested initially and after any changes which may affect these parameters. See figures 3 and 4.
4/ Analog inputs must be at 0 V to achieve correct power-down current.
5/ All input signals are specified with t
6/ Production tested with f
7/ Specified using 10% and 90% points on waveform of interest.
8/ These numbers are measured with the load circuit of figure 3 and defined as the time required for the output to cross 0.8 V
9/ These numbers are derived from the measured time taken by the data output to change 0.5 V when loaded with the circuit
Data valid to SCLK falling
edge hold time
TFS to SCLK falling edge
hold time
RFS low to SCLK falling
edge setup time
RFS low to data valid delay
8/
SCLK high pulse width
SCLK low pulse width
SCLK rising edge to data
valid delay 8/
RFS to SCLK falling edge
hold time
Bus relinquish time after
rising edge of RFS
Bus relinquish time after
rising edge of SCLK 9/
TFS low to SCLK falling edge
setup time
Data valid to SCLK falling
edge setup time
Data valid to SCLK falling
edge hold time
TFS low to SCLK falling edge
hold time
and after any design changes which may affect these parameters.
or 2.4 V.
of figure 3. The measured number is then extrapolated back to remove effects of charging or discharging the 50 pF
capacitor. This means that the times quoted in the timing characteristics are the true bus relinquish times of the part and as
such are independent of external bus loading capacitances.
DD
= +5.25 V, AGND = DGND = 0 V, REF IN = +2.5 V, f
DEFENSE SUPPLY CENTER COLUMBUS
Test
MICROCIRCUIT DRAWING
COLUMBUS, OHIO 43216-5000
STANDARD
CLKIN
at 2.5 MHz. It is guaranteed by characterization to operate at 100 kHz.
Symbol
TABLE I. Electrical performance characteristics - continued.
t
t
t
t
t
t
t
t
t
t
t
t
t
t
19A
11
12
13
14
15
16
17
18
19
20
21
22
23
r
= t
f
= 5 ns (10% to 90% 0f 5 V) and timed from a voltage level of 1.6 V. Tested initially
unless otherwise specified
Conditions 1/, 3/, 5/
-55 C
T
A
CLKIN
+125 C
= 2.5 MHz external, MUX OUT connected to SHA IN.
SIZE
A
subgroups
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
Group A
REVISION LEVEL
Device
type
C
01
01
01
01
01
01
01
01
01
01
01
01
01
01
Min
10
20
20
50
50
20
20
10
15
40
Limits
SHEET
5962-95615
Max
40
35
50
90
8
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns