LTC2640HTS8-LM8#TRMPBF Linear Technology, LTC2640HTS8-LM8#TRMPBF Datasheet - Page 14

• Manufacturer Part Number: LTC2640HTS8-LM8#TRMPBF
• Description: IC DAC 8BIT VOUT W/REF TSOT23-8
• Manufacturer: Linear Technology

Specifications of LTC2640HTS8-LM8#TRMPBF

• Settling Time: 3.2µs
• Number Of Bits: 8
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 450µW
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-8, TSOT-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC2640
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2640
PIN FUNCTIONS
CS/LD (Pin 1): Serial Interface Chip Select/Load Input.
When CS/LD is low, SCK is enabled for shifting data on
SDI into the register. When CS/LD is taken high, SCK
is disabled and the specifi ed command (see Table 1) is
executed.
SCK (Pin 2): Serial Interface Clock Input. CMOS and TTL
compatible.
SDI (Pin 3): Serial Interface Data Input. Data on SDI is
clocked into the DAC on the rising edge of SCK. The LTC2640
accepts input word lengths of either 24- or 32-bits.
GND (Pin 4): Ground.
V
(LTC2640-L) or 4.5V ≤ V
to GND with a 0.1μF capacitor.
REF (Pin 6): Reference Voltage Input or Output. When
External Reference mode is selected, REF is an input
(0V ≤ V
14
CC
–10
–12
–14
–16
–18
–2
–4
–6
–8
(Pin 5): Supply Voltage Input. 2.7V ≤ V
0
1k
Multiplying Bandwidth
V
V
V
CODE = FULL SCALE
CC
REF(DC)
REF(AC)
REF
= 5V
≤ V
= 2V
= 0.2V
10k
CC
FREQUENCY (Hz)
P-P
) where the voltage supplied sets the
100k
CC
≤ 5.5V (LTC2640-H). Bypass
2640 G33
1000k
500
400
300
200
100
0
100
Noise Voltage vs Frequency
CC
INTERNAL REF .
CODE = MIDSCALE
≤ 5.5V
1k
FREQUENCY (Hz)
LTC2640-H
(V
LTC2640-L
(V
CC
CC
10k
full-scale voltage. When Internal Reference is selected,
the 10ppm/°C 1.25V (LTC2640-L) or 2.048V (LTC2640-H)
internal reference is available at the pin. This output may
be bypassed to GND with up to 10μF (0.33μF is recom-
mended), and must be buffered when driving external DC
load current.
V
CLR (Pin 8, LTC2640-Z): Asynchronous Clear Input. A
logic low at this level-triggered input clears all registers
and causes the DAC voltage output to reset to Zero. CMOS
and TTL compatible.
REF_SEL (Pin 8, LTC2640-M): Selects default Reference
at power-up. Tie to V
or GND to select an External Reference. After power-up,
the logic state at this pin is ignored and the reference may
be changed only by software command.
= 5V)
= 4V)
OUT
(Pin 7): DAC Analog Voltage Output.
100k
2640 G34
T
A
1M
= 25°C, unless otherwise noted.
10μV/DIV
CC
to select the Internal Reference,
0.1Hz to 10Hz Voltage Noise
LTC2640-L, V
INTERNAL REF .
CODE = MIDSCALE
CC
= 4V
1s/DIV
2640 G35
2640fb