AD7846 Analog Devices, AD7846 Datasheet - Page 7

• Manufacturer Part Number: AD7846
• Description: 16-Bit Voltage Output CMOS DAC
• Manufacturer: Analog Devices

Specifications of AD7846

• Resolution (bits): 16bit
• Dac Update Rate: 143kSPS
• Dac Settling Time: 7µs
• Max Pos Supply (v): +15.75V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Par

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Table 5. Pin Function Descriptions
Pin
1 to 3
4
5
6
7
8
9
10 to 19
20
21
22
23
24
25
26 to 28
Table 6. Output Voltage Ranges
Output Range
0 V to +5 V
0 V to +10 V
+5 V to −5 V
+5 V to −5 V
+10 V to −10 V
Mnemonic
DB2 to DB0
V
V
R
V
V
V
DB15 to DB6
DGND
V
R/W
CS
CLR
LDAC
DB5 to DB3
DD
OUT
IN
REF+
REF−
SS
CC
V
V
V
DB15
DB14
DB13
DB12
DB11
Figure 7. PDIP Pin Configuration
REF+
REF–
DB2
DB1
DB0
V
OUT
V
R
DD
SS
IN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
(Not to Scale)
Description
Positive Supply for Analog Circuitry. This is +15 V nominal.
DAC Output Voltage.
Input to Summing Resistor of DAC Output Amplifier. This is used to select output voltage ranges. See Table 6.
V
V
specified for both conditions.
Negative Supply for the Analog Circuitry. This is −15 V nominal.
Data I/Os. DB15 is MSB.
Ground for Digital Circuitry.
Positive Supply for Digital Circuitry. This is +5 V nominal.
R/W Input. This pin can be used to load data to the DAC or to read back the DAC latch contents.
Chip Select Input. This pin selects the device.
Clear Input. The DAC can be cleared to 000…000 or 100…000. See Table 7.
Asynchronous Load Input to DAC.
Data I/Os.
Data I/Os. DB0 is LSB.
AD7846
TOP VIEW
REF+
REF−
Input. The DAC is specified for V
Input. For unipolar operation connect V
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DB3
DB4
DB5
LDAC
CLR
CS
R/W
V
DGND
DB6
DB7
DB8
DB9
DB10
CC
V
+5 V
+5 V
+5 V
+5 V
+5 V
REF+
Rev. G | Page 7 of 24
REF+
= +5 V.
REF−
to 0 V, and for bipolar operation connect it to −5 V. The device is
V
0 V
0 V
−5 V
0 V
−5 V
V
V
REF−
DB15
DB14
V
REF+
REF–
OUT
V
R
SS
IN
Figure 8. CERDIP Pin Configuration
10
11
5
6
7
8
9
12 13 14 15 16
4
3
(Not to Scale)
AD7846
TOP VIEW
2
1
PIN 1
IDENTIFIER
28 27 26
17 18
R
V
0 V
V
+5 V
0 V
OUT
OUT
IN
25
24
23
22
21
20
19
LDAC
CLR
CS
R/W
DGND
DB6
V
CC
AD7846