8
2704fd
TYPICAL PERFORMANCE CHARACTERISTICS
V– (Pins 1, 8, 15, 22, 31, 36): Analog Negative Supply,
Typically –15V. –4.5V to –16.5V Range.
REFG1 (Pin 2): Reference 1 Ground. High impedance
input, does not carry supply currents. Tie to clean analog
ground.
AGNDA (Pin 3): DAC A Signal Ground. High impedance
input, does not carry supply currents. Tie to clean analog
ground.
VOSA (Pin 4): Offset Adjust for DAC A. Nominal input
range is ±5V. VOS(DAC A) = –0.01 V(VOSA) [0V to 5V,
±2.5V modes]. See Operation section.
C1A (Pin 5): Feedback Capacitor Connection for DAC A
Output. This pin provides direct access to the negative
input of the channel A output amplier.
OUTA (Pin 6): DAC A Voltage Output Pin. For best load
regulation, this open-loop amplier output is connected
to RFBA as close to the load as possible.
RFBA (Pin 7): DAC A Output Feedback Resistor Pin.
LDAC(Pin9):AsynchronousDACLoadInput.WhenLDAC
is a logic low, all DACs are updated.
0.1Hz to 10Hz Noise
VCC Supply Current
vs Logic Voltage
1s/DIV
1μV/DIV
2704 G16
V+/V– = ±15V
VREF = 5V
0V TO 5V RANGE
CODE = 0
LOGIC VOLTAGE (V)
0
I CC
(mA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
2.5
3.5
2704 G17
2.0
4.5 5.0
1.0 1.5
3.0
4.0
VDD = 5V
SCK, SDI, CS/LD, LDAC
CLR TIED TOGETHER
PIN FUNCTIONS
LTC2704-16/LTC2704-14/LTC2704-12
Positive Slew
Negative Slew
2.5μs/DIV
5V/DIV
2704 G13
V+/V– = ±15V
VREF = 5V
±10V RANGE
20V STEP
2.5μs/DIV
5V/DIV
2704 G14
V+/V– = ±15V
VREF = 5V
±10V RANGE
20V STEP
2.5μs/DIV
CS/LD
5V/DIV
VOUT
2mV/DIV
2704 G15
Midscale Glitch