Philips Semiconductors Linear Products

Product specification

NE/SE5410

10-Bit high-speed multiplying D/A converter

August 31, 1994

771

Figure 6. Basic Connections

a. Positive Reference Voltage

b. Negative Reference Voltage

NOTES:

R16 + RT = R15 = RREF

RT < <R16

IO F.S. = 2 IR = VREF/RREF

NOTES:

R15 + RT = R16

RT < <R15

IVREF ≥ RVEE + 3V

14

16

15

3

2

1

5410

D1 THROUGH D10

VR (+)

VCC

VEE

RT

R15

R16

IO

15

13

2

1

5410

D1 THROUGH D10

VR (–)

VCC

VEE

RT

R15

R16

IO

OUTPUT VOLTAGE COMPLIANCE

The output voltage compliance ranges from -2.5 to +2.5V. As shown

in Figure 2, this compliance range is nearly constant over

temperature. At the temperature extremes, however, the compliance

ACCURACY

Absolute accuracy is a measure of each output current level with

respect to its intended value. It is dependent upon relative accuracy

and full-scale current drift. Relative accuracy, or linearity, is the

measure of each output current with respect to its intended fraction

of the full-scale current. The relative accuracy of the NE5410 is fairly

constant over temperature due to the excellent temperature tracking,

of the implanted resistors. The full-scale current from the reference

amplifier may drift with temperature causing a change in the

absolute accuracy. However, the NE5410 has a low full-scale

current drift with temperature.

The SE5410 and the NE5410 are accurate to within

± LSB at 25°C

with a reference current of 2.0mA on Pin 16.

MONOTONICITY

The NE5410 and SE5410 are guaranteed monotonic over

temperature. This means that for every increase in the input digital

code, the output current either remains the same or increases but

never decreases. In the multiplying mode, where reference input

current will vary, monotonicity can be assured if the reference input

current remains above 0.5mA.

SETTLING TIME

The worst-case switching condition occurs when all bits are

switched “on,” which corresponds to a LOW-to-HIGH transition for

all bits. This time is typically 250ns for the output to settle to within

±

1/2LSB for 10-bit accuracy, and 200ns for 8-bit accuracy. The

turn-off time is typically 120ns. These times apply when the output

swing is limited to a small (<0.7V) swing and the external output

capacitance is under 25pF.

The major carry (MSB off-to-on, all others on-to-off) settles in

approximately the same time as when all bits are switched off-to-on.

If a load resistor of 625

Ω is connected to ground, allowing the output

to swing to -2.5V, the settling time increases to 1.5

µs.

Extra care must be taken in board layout as this is usually the

dominant factor in satisfactory test results when measuring settling

time. Short leads, 100

µF supply bypassing, and minimum scope

lead length are all necessary.

A typical test setup for measuring settling time is shown in Figure 7.

The same setup for the most part can be used to measure the slew

rate of the reference amplifier (Figure 9) by tying all data bits high,

pulsing the voltage reference input between 0 and 2V, and using a

500