Datasheet

REV. B
–4–
AD768
WAFER TEST LIMITS
1
Parameter AD768ACHIPS Limit Units
Integral Nonlinearity
2
±8 LSB max
Differential Nonlinearity
2
±6 LSB max
Offset Error ±0.2 % FSR max
Gain Error ±1.0 % FSR max
Reference Voltage ±1.0 % of nom. 2.5 V max
Positive Supply Current 40 mA max
Negative Supply Current 73 mA max
Power Dissipation 600 mW max
NOTES
1
Electrical test are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal
yield loss, yield after packaging is not guaranteed for standard product dice.
2
Limits extrapolated from testing of individual bit errors.
3
Die offers latch control pad. Edge triggered latches become level triggered when latch control and clock pads are high.
4
Die substrate is connected to V
EE.
PIN DESCRIPTIONS
Pin No. Symbol Type Name and Function
1 IOUTA AO DAC Current Output. Full-scale current when all data bits are 1s.
2 NR AI Noise Reduction Node. Add capacitor for noise reduction.
3 REFOUT AO Reference Output Voltage. Nominal value is 2.5 V.
4 NC NC No Connect. Reserved for internal use.
5 REFCOM P Reference Ground.
6 IREFIN AI Reference Input Current. Nominal is 5 mA. DAC full-scale is 4× this current.
7 DB0 DI Data Bit 0 (LSB).
8–14 DB1–DB7 DI Data Bits 1–7.
15 DCOM P Digital Ground.
16 CLOCK DI Clock Input. Data latched on positive edge of clock.
17–23 DB8–DB14 DI Data Bits 8–14.
24 DB15 DI Data Bit 15 (MSB).
25 V
DD
P Positive Supply Voltage. Nominal is +5 V.
26 V
EE
P Negative Supply Voltage. Nominal is –5 V.
27 IOUTB AO Complementary DAC Current Output. Full-scale current when all data bits are 0s.
28 LADCOM P DAC Ladder Common.
Type: AI = Analog Input; DI = Digital Input; AO = Analog Output; P = Power.
(T
A
= +258C, V
DD
= +5.0 V, V
EE
= –5.0 V, I
REFIN
= 5 mA, unless otherwise noted)
V
DD
V
DD
DB15 DB14 DB13 DB12 DB11 DB10
REFCOM IREFIN DB0 DB1 DB2 DB3 DB4
V
EE
V
EE
IOUTB
LADCOM
IOUTA
NR
REFOUT
NC
DB9
DB8
CLOCK
LATCH CONTROL
DCOM
DB7
DB6
DB5
Die Size:
0.1106
× 0.1417 inch, 15,672 sq. mils
(2.81
× 3.60 mm, 10.116 sq. mm)
DICE CHARACTERISTICS
3, 4
PIN CONFIGURATION
14
13
12
11
17
16
15
20
19
18
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
AD768
NC = NO CONNECT
IOUTA
V
DD
(+5V)
V
EE
(–5V)
IOUTB
LADCOM
NR
REFOUT
NC
DB13
DB14
DB15 (MSB)
REFCOM
IREFIN
(LSB) DB0
DB1
DB2
DB3
DB10
DB11
DB12
DB4
DB5
DB6
DB7
DB9
DCOM
CLOCK
DB8