ltc2633-lz8 Linear Technology Corporation, ltc2633-lz8 Datasheet - Page 14

• Manufacturer Part Number: ltc2633-lz8
• Description: Dual 12-/10-/8-bit I2c Vout Dacs With 10ppm/?c Reference
• Manufacturer: Linear Technology Corporation

10µV/DIV
pin Functions
LTC2633
typical perFormance characteristics
LTC2633
SCL (Pin 1): Serial Clock Input Pin. Data is shifted into the
SDA pin at the rising edges of the clock. This high impedance
pin requires a pull-up resistor or current source to V
CA0 (Pin 2): Chip Address Bit 0. Tie this pin to V
or leave it floating to select an I
part (see Table 1).
REF (Pin 3): Reference Voltage Input or Output. When
external reference mode is selected, REF is an input (1V ≤
V
DAC output voltage. When internal reference is selected,
the 10ppm/°C 1.25V (LTC2633-L) or 2.048V (LTC2633-H)
internal reference (half full-scale) is available at the pin.
This output may be bypassed to GND with up to 10µF
14
REF
–10
–12
–14
–16
–18
–2
–4
–6
–8
2
0
≤ V
1k
Multiplying Bandwidth
0.1Hz to 10Hz Voltage Noise
V
CODE = MID-SCALE
INTERNAL REFERENCE
V
V
V
CODE = FULL-SCALE
CC
CC
REF(DC)
REF(AC)
CC
= 5V, V
= 5V
) where the voltage supplied sets the full-scale
= 0.2V
= 2V
FS
10k
= 2.5V
FREQUENCY (Hz)
P-P
1s/DIV
100k
2
2632 G34
2633 G31
C slave address for the
1M
SWITCH 0-FS
2mV/DIV
5V/DIV
2V/DIV
1 DAC
V
500
400
300
200
100
SCL
OUT
0
100
Noise Voltage vs Frequency
DAC to DAC Crosstalk (Dynamic)
V
CODE = MID-SCALE
INTERNAL REFERENCE
CC
CC
= 5V
, GND
CC
LTC2633-L
1k
.
LTC2633-H
FREQUENCY (Hz)
9TH CLOCK OF
3RD DATA BYTE
2µs/DIV
LTC2633-H12, V
6.7nV•s TYP
(0.1µF is recommended) and must be buffered when
driving external DC load current.
GND (Pin 4): Ground.
V
V
(LTC2633-L) or 4.5V ≤ V
to GND with a 0.1µF capacitor.
SDA (Pin 8): Serial Data Bidirectional Pin. Data is shifted
into the SDA pin and acknowledged by the SDA pin. This
pin is high impedance while data is shifted in. Open drain
N-channel output during acknowledgement. SDA requires
a pull-up resistor or current source to V
10k
OUTA
CC
(Pin 7): Supply Voltage Input. 2.7V ≤ V
, V
100k
OUTB
CC
= 5V
2633 G32
2633 G35
(Pins 5,6): DAC Analog Voltage Output.
T
1M
A
= 25°C unless otherwise noted.
–0.2
–0.4
–0.6
–0.8
–0.5
–1.0
0.8
0.6
0.4
0.2
1.0
0.5
0
0
–50
CC
1
Gain Error vs Reference Input
Gain Error vs Temperature
V
GAIN ERROR OF 2 CHANNELS
CC
1.5
≤ 5.5V (LTC2633-H). Bypass
–25
= 5.5V
2
REFERENCE VOLTAGE (V)
0
TEMPERATURE (°C)
2.5
25
3
50
CC
3.5
.
75
4
CC
100
4.5
≤ 5.5V
125
5
2633 G33
2633 G36
2633fb
5.5
150