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Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
DESCRIPTION
The MC3410 series are 10-bit Multiplying Digital-to-Analog Converters. They are capable of high-speed performance, and are used as general-purpose building blocks in cost-effective D/A systems. The Philips Semiconductors design provides complete 10-bit accuracy without laser trimming, and guaranteed monotonicity over temperature. Segmented current sources, in conjunction with an R-2R DAC provides the binary weighted currents. The output buffer amplifier and voltage reference have been omitted to allow greater speed, lower cost, and maximum user flexibility.
PIN CONFIGURATION
F Package
VEE 1 GND 2 OUTPUT 3 D1 MSB 4 D2 5 D3 6 D4 7 16 VREF + 15 VREF - 14 VCC 13 D10 (LSB) 12 D9 11 D8
10 D7 9 TOP VIEW D6
FEATURES
D5 8
* 10-bit resolution and accuracy (0.05%) * Guaranteed monotonicity over temperature * Fast settling time--250ns typical * Digital inputs are TTL and CMOS compatible * Wide output voltage compliance range * High-speed multiplying input slew rate--20mA/s * Reference amplifier internally-compensated * Standard supply voltages +5V and -15V
APPLICATIONS
BLOCK DIAGRAM
MSB LSB D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 4 5 6 7 89 10 11 12 13 3 CURRENT SWITCHES I0
* Successive approximation A/D converters * High-speed, automatic test equipment * High-speed modems * Waveform generators * CRT displays * Strip CHART and X-Y plotters * Programmable power supplies * Programmable gain and attenuation
LADDER TERMINATORS
R-2R LADDER
VREF(+) VREF(-)
16 15 BIAS CIRCUITRY REFERENCE CURRENT AMPLIFIER 1 VEE 2 GND 14 VCC
ORDERING INFORMATION
DESCRIPTION 16-Pin Ceramic Dual In-Line Package (CERDIP) 16-Pin Ceramic Dual In-Line Package (CERDIP) TEMPERATURE RANGE 0 to +70C 0 to +70C ORDER CODE MC3410F MC3410CF DWG # 0582B 0582B
August 31, 1994
743
853-0936 13721
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
ABSOLUTE MAXIMUM RATINGS
TA=+25C unless otherwise noted SYMBOL VCC VEE VI VO IREF(16) VREF VREF(D) TA TJ PD Digital input voltage Applied output voltage Reference current Reference amplifier inputs Reference amplifier differential inputs Operating ambient temperature range MC3410, 3410C Junction temperature, ceramic package Maximum power dissipation, TA=25C (still-air)1 F package NOTES: 1. Derate above 25C, at the following rates: F package at 9.5mW/C 1190 mW Power supply PARAMETER RATING +7.0 -18 +15 0.5, -5.0 2.5 VCC, VEE 0.7 0 to +70 UNIT VDC VDC VDC VDC mA VDC VDC C C
+150
August 31, 1994
744
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
ELECTRICAL CHARACTERISTICS
VCC=+5.0VDC, VEE=-15DC, SYMBOL Er TCEr V REF =2.0mA, all digital inputs at high logic level. MC3410 Series: TA=0C to +70C, unless otherwise noted. R16 TEST CONDITIONS TA=25C MC3410 Min Typ Max 0.05 1/4 2.5 Over temperature TA=25C TA=25C 10 250 35 20 60 10 250 35 20 70 2.5 Min MC3410C Typ Max 0.1 1/2 UNIT % LSB ppm/C Bits ns ns ppm/C VDC 0.8 +.04 -0.4 -5.0 5.0 4.2 4.0 -2.5 +0.2 20 2.0 0.01 0.003 25 4.0 +18 -20 +5.25 -15.75 380 +4.75 -14.25 +18 -20 +5.25 -15.75 380 0.02 mA A mA mA A VDC mA/s s %/% pF pF mA VDC
PARAMETER Relative accuracy (error relative to full-scale IO) Relative accuracy drift (relative to full-scale IO) Monotonicity Settling time to within LSB (all bits LOW-to-HIGH) Propagation delay time Output full scale current drift Digital input logic levels (all bits) HIGH-level, Logic "1" LOW-level, Logic "0" Digital input current (all bits) HIGH-level, VIH=5.5V LOW-level, VIL=0.8V Reference input bias current (Pin 15) Output current range Output current (all bits high) Output current (all bits low) Output voltage compliance Reference amplifier slew rate Reference amplifier settling time Output current power supply sensitivity Output capacitance Digital input capacitance (all bits high) Power supply current (all bits low) Power supply voltage range Power consumption (all bits low) (all bits high)
tS tPLH tPHL TCIO VIH
2.0
0.8 +.04 -0.4 -5.0 5.0 4.2 2.0 -2.5 +0.2 20
2.0
IIH IIL IREF(15) IOR IOH IOL VO SR IREF ST IREF PSRR(-) CO CI ICC IEE VCC VEE
-0.05 -1.0 4.0 VREF=2.000V, R16=1000 TA=25C TA=25C 3.8 3.996 0
-0.05 -1.0 4.0 3.8 3.996 0
0 to 4.0mA, 0.1% VO=0
2.0 0.003 25 4.0
-11.4 TA=25C +4.75 -14.25 +5.0 -15 220 200
-11.4 +5.0 -15 220 200
mW
August 31, 1994
745
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
4.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0 -2.0 -4.0 -6.0 -8.0 -10 -12 0.1 OUTPUT CFURRENT (mA) B CURVE R15 = R16 = 1.0k VREF (-) = 0V
2.0
RELATIVE OUTPUT (dB)
3.0
VCC = +5.0V VEE = -15.0V TA = 25oC IREF = 2mA
SMALL SIGNAL BW ro = 100 VREF (+) = 50 mV p-p
CENTERED AT + 200mV
1.0
A CURVE
0
-1.0 -5
LARGE SIGNAL BW ro = 200 VREF (+) = 2 Vp-p
CENTERED AT + 1.0V 0.2 0.3 0.5 1.0 2.0 3.0 5.0 10 I, FREQUENCY (MHz)
-3
-1
0
1
3
5
COMPLIANCE VOLTAGE (VOLTS)
Figure 1. Output Current vs Output Compliance Voltage
OUTPUT COMPLIANCE VOLTAGE (VOLTS)
Figure 4. Reference Amplifier Frequency Response
4.0 3.0 2.0 1.0 0 -1.0 -2.0 -3.0 -4.0 -75 -50 -25 0 25 50 75 100 125 +VCC = +5V -VEE = -15V IREF = 2mA
CIRCUIT DESCRIPTION
The MC3410 consists of four segment current sources which generate the two most significant bits (MSBs), and an R-2R DAC implemented with ion-implanted resistors for scaling the remaining eight least significant bits (LSBs) (See Figure 5). This approach provides complete 10-bit accuracy without trimming. The individual bit currents are switched ON or OFF by fully differential current switches. The switches use current steering for speed. An on-chip high-slew reference current amplifier drives the R-2R ladder and segment decoder. The currents are scaled in such a way that, with all bits on, the maximum output current is two times 1023/1024 of the reference amplifier current, or nominally 3.996mA for a 2.000mA reference input current. The reference amplifier allows the user to provide a voltage input. Out-board resistor R16 (see Figure 6) converts this voltage to a usable current. A current mirror doubles this reference current and feeds it to the segment decoder and resistor ladder. Thus, for a reference voltage of 2.0V and a 1k resistor tied to Pin 16, the full-scale current is approximately 4.0mA. This relationship will remain regardless of the reference voltage polarity. Connections for a positive reference voltage are shown in Figure 6a. For negative reference voltage inputs, or for bipolar reference voltage inputs in the multiplying mode, R15 can be tied to a negative voltage corresponding to the minimum input level. For a negative reference input, R16 should be grounded (Figure 6b). In addition, the negative voltage reference must be at least 3V above the VEE supply voltage for best operation. Bipolar input signals may be handled by connecting R16 to a positive voltage equal to the peak positive input level at Pin 15.
TA = (oC)
Figure 2. Maximum Output Compliance Voltage vs Temperature
I CC POWER SUPPLY CURRENT (mA) ,
13 12 11 10 4 3 2 1 0 -75 -50 -25 0 25 50 TA (oC) 75 100 125 +ICC +VCC = +5V -VEE = -15V IREF = 2mA IEE
Figure 3. Power Supply Current vs Temperature
August 31, 1994
746
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
When a DC reference voltage is used, capacitive bypass to ground is recommended. The 5V logic supply is not recommended as a reference voltage. If a well regulated 5.0V supply, which drives logic, is to be used as the reference, R16 should be decoupled by connecting it to the +5.0V logic supply through another resistor and bypassing the junction of the two resistors with a 0.1F capacitor to ground. The reference amplifier is internally-compensated with a 10pF feed-forward capacitor, which gives it its high slew rate and fast settling time. Proper phase margin is maintained with all possible values of R16 and reference voltages which supply 2.0mA reference current into Pin 16. The reference current can also be supplied by a high impedance current source of 2.0mA. As R16 increases, the bandwidth of the amplifier decreases slightly and settling time increases. For a current source with a dynamic output impedance of 1.0M, the bandwidth of the reference amplifier is approximately half what it is in the case of R16=1.0k, and settling time is 10s. The reference amplifier phase margin decreases as the current source value decreases in the case of a current source reference, so that the minimum reference current supplied from a current source is 0.5mA for stability.
(4) MSB D1 (5) D2 (6) D3 (7) D4
OUTPUT VOLTAGE COMPLIANCE
The output voltage compliance ranges from -2.5 to +0.2V. As shown in Figure 2, this compliance range is nearly constant over temperature. At the temperature extremes, however, the compliance voltage may be reduced if VEE>-15V.
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 MC3410 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 MC3410 has a low full-scale current drift with temperature. The MC3410 are accurate to within 0.05% at 25C with a reference current of 2.0mA on Pin 16.
(13) LSB D10 GND (2)
(8) D5
(9) D6
(10) D7
(11) D8
(12) D9
IOUT (3) SEGMENT DECODER
VBIAS (INTERNAL)
2R
2R
2R
2R
2R
2R
2R
2R
R
R
R
R
R
R
(16) + VREF + CODE SELECTED 0111110011 (15) - - 2R1 R1 R1 R1 R1
VEE (1)
Figure 5. MC3410 Equivalent Circuit
August 31, 1994
747
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
VR (+)
RT VCC 14 D1 THROUGH D10 1 VEE a. Positive Reference Voltage R16 16 R15 15 IO 3410 3 NOTES: R16 + RT = R15 = RREF RT < 2
RT VR (-) VCC R16 13 R15 15 IO D1 THROUGH D10 1 VEE a. Negative Reference Voltage 3410 NOTES: R15 + RT = R16 RT < 2
Figure 6. Basic Connections
MONOTONICITY
The MC3410 and MC3410C 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.
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 is connected to ground, allowing the output to swing to -2.5V, the settling time increases to 1.5s. 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, 100F 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 load resistor RL.
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.
August 31, 1994
748
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
VCC 0.1F
+2VDC 14 4 5 6 7 8 9 10 11 12 13 VI 50 1 0.1F 2 MC3410 3 VO CO 25pF VO 0 tS -- 250ns TYPICAL TO 1/2 LSB USE RL TO GND FOR TURN-OFF MEASUREMENT FOR SETTLING TIME MEASUREMENT. (ALL BIT SWITCHED LOW TO HIGH) 500 15 1k RL 0.1F VI 0.4V 0.5V 16 1k 2.4V 1.4V RISE AND FALL TIMES 10ns
VEE
Figure 7. Settling Time
VCC 0.1F
14 4 5 6 7 8 9 10 11 12 13 VI 50 1 0.1F 2 RL 20 MC3410 3 VO VO 0V 15 1k 0.1F 16 1k +2VDC VI 0.4V 2.4V
RISE AND FALL TIMES 10ns
-80mV TO 1/2 LSB tPLH FOR PROPAGATION DELAY TIME tPHL
VEE
Figure 8. Propagation Delay Time
August 31, 1994
749
Philips Semiconductors Linear Products
Product specification
10-Bit high-speed multiplying D/A converter
MC3410, MC3410C
VCC 0.1F
VREF (+) 14 4 5 6 7 8 9 10 11 12 13 1 0.1F 2 25pF MC3410 3 15 1k RL 500 VO 0.1F 16 1k
2V 0 2.0V VREF (+) 0 0.5V VO 0 tS = 2s TYPICAL TO 0.1% NOTE: Use RL = 20 to GND for slew rate measurement. SLEW RATE
VEE
Figure 9. Reference Amplifier Settling Time and Slew Rate
P BUS
7 6 5 4 3 2 1 0 E2 E1 2-BIT Q0 LATCH 1/2 LS375 Q2 E0-2
OE
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1
8-BIT LATCH LS373
10-BIT DAC (MC3410)
OUTPUT
CONTROL SIGNAL FROM P
E2-3 Q2 2-BIT LATCH Q3 1/2 LS375
E1
E2
DATA
D1 - D2
D3 - D10
Figure 10. Interfacing 10-Bit DAC With 8-Bit Microprocessor
August 31, 1994
750
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