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DAC8734SPFBR
Public Made by Adomby adom
Texas Instruments Digital To Analog Converters (DACs), TQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownDAC8734SPFBR
Texas Instruments · Digital To Analog Converters (DACs) · TQFP-48(7x7)
DAC8734SPFBR from Texas Instruments, in a TQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | Not connected. |
| 2 | CS | input | SPI chip select input (active low); data are not clocked into the SPI shift register unless CS is low, and SDO is high-impedance when CS is high. |
| 3 | SCLK | input | SPI bus clock input, up to 50MHz. |
| 4 | SDI | input | SPI bus serial data input. |
| 5 | SDO | output | SPI serial data output, high-impedance when CS is high; used for daisy-chaining. |
| 6 | LDAC | input | Load DAC latch control input (active low); when low the DAC latch is transparent and Input Data Register contents are transferred to it. |
| 7 | RST | input | Reset input (active low); resets input registers and DACs to values defined by the UNI/BIP pins and sets Gain and Zero Registers to defaults. |
| 8 | GPIO-0 | bidirectional | General-purpose digital input/output 0 with open-drain output; needs a 10kΩ pull-up resistor to IOVDD when used as an output. |
| 9 | GPIO-1 | bidirectional | General-purpose digital input/output 1 with open-drain output; needs a 10kΩ pull-up resistor to IOVDD when used as an output. |
| 10 | UNI/BIP-A | input | Output mode select for group A (DAC-0, DAC-1): tied to IOVDD for unipolar (straight binary), tied to DGND for bipolar (twos complement). |
| 11 | DGND | power_in | Digital ground. |
| 12 | NC | unconnected | Not connected. |
| 13 | IOVDD | power_in | Interface power supply (1.8V to DVDD). |
| 14 | DVDD | power_in | Digital power supply (5V nominal in the specifications). |
| 15 | VOUT-0 | output | DAC-0 output. |
| 16 | RFB2-0 | passive | DAC-0 RFB2 feedback; connect to VOUT-0 for gain 2, leave open for gain 4. |
| 17 | RFB1-0 | passive | DAC-0 RFB1 feedback; connect to VOUT-0 for gain 2 or 4. |
| 18 | SGND-0 | power_in | DAC-0 signal ground, connected to REFGND-A. |
| 19 | NC | unconnected | Not connected. |
| 20 | SGND-1 | power_in | DAC-1 signal ground, connected to REFGND-A. |
| 21 | RFB1-1 | passive | DAC-1 RFB1 feedback; connect to VOUT-1 for gain 2 or 4. |
| 22 | RFB2-1 | passive | DAC-1 RFB2 feedback; connect to VOUT-1 for gain 2, leave open for gain 4. |
| 23 | VOUT-1 | output | DAC-1 output. |
| 24 | NC | unconnected | Not connected. |
| 25 | NC | unconnected | Not connected. |
| 26 | AVDD | power_in | Positive analog power supply (not above 24V, not below 4.75V). |
| 27 | AGND | power_in | Analog ground. |
| 28 | AVSS | power_in | Negative analog power supply (not above -4.75V, not below -18V). |
| 29 | REFGND-A | power_in | Reference REF-A ground; connect to AGND. |
| 30 | REF-A | input | Group A (DAC-0, DAC-1) reference input. |
| 31 | REF-B | input | Group B (DAC-2, DAC-3) reference input. |
| 32 | REFGND-B | power_in | Reference REF-B ground; connect to AGND. |
| 33 | AVSS | power_in | Negative analog power supply (not above -4.75V, not below -18V). |
| 34 | VMON | output | Analog monitor output, Hi-Z or connected to one of the four DAC outputs or AIN depending on the Monitor Register. |
| 35 | AVDD | power_in | Positive analog power supply (not above 24V, not below 4.75V). |
| 36 | NC | unconnected | Not connected. |
| 37 | NC | unconnected | Not connected. |
| 38 | VOUT-3 | output | DAC-3 output. |
| 39 | RFB2-3 | passive | DAC-3 RFB2 feedback; connect to VOUT-3 for gain 2, leave open for gain 4. |
| 40 | RFB1-3 | passive | DAC-3 RFB1 feedback; connect to VOUT-3 for gain 2 or 4. |
| 41 | SGND-3 | power_in | DAC-3 signal ground, connected to REFGND-B. |
| 42 | NC | unconnected | Not connected. |
| 43 | SGND-2 | power_in | DAC-2 signal ground, connected to REFGND-B. |
| 44 | RFB1-2 | passive | DAC-2 RFB1 feedback; connect to VOUT-2 for gain 2 or 4. |
| 45 | RFB2-2 | passive | DAC-2 RFB2 feedback; connect to VOUT-2 for gain 2, leave open for gain 4. |
| 46 | VOUT-2 | output | DAC-2 output. |
| 47 | AIN | input | Auxiliary analog input, connected to the analog monitor mux. |
| 48 | UNI/BIP-B | input | Output mode select for group B (DAC-2, DAC-3): tied to IOVDD for unipolar (straight binary), tied to DGND for bipolar (twos complement). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TQFP-48(7x7) |
| Category | ADC/DAC/Data Conversion |
| Pins | 48 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Bipolar linearity error | INL | -1 | 1 | LSB | Bipolar output | 3 | |
| Bipolar differential linearity error | DNL | -1 | 1 | LSB | Bipolar output | 3 | |
| Bipolar zero error before calibration | -4 | 4 | LSB | TA = +25°C, before user calibration | 3 | ||
| Bipolar zero error after calibration | -0.125 | 0.125 | LSB | TA = +25°C, after user calibration | 3 | ||
| Bipolar zero error TC | -0.5 | 0.5 | ppm FSR/°C | 3 | |||
| Bipolar gain error before calibration | -4 | 4 | LSB | TA = +25°C, before user calibration | 3 | ||
| Bipolar gain error after calibration | -1 | 1 | LSB | TA = +25°C, after user calibration | 3 | ||
| Bipolar gain error TC | -0.5 | 0.5 | ppm FSR/°C | 3 | |||
| Bipolar DC crosstalk | -0.2 | 0.2 | LSB | Output unloaded | 3 | ||
| Unipolar linearity error | INL | -1 | 1 | LSB | AVDD = +21V, AVSS = -11V | 3 | |
| Unipolar differential linearity error | DNL | -1 | 1 | LSB | AVDD = +21V, AVSS = -11V | 3 | |
| Unipolar zero error before calibration | -4 | 4 | LSB | AVDD = +21V, AVSS = -11V, TA = +25°C, before user calibration | 3 | ||
| Unipolar zero error after calibration | -0.125 | 0.125 | LSB | AVDD = +21V, AVSS = -11V, TA = +25°C, after user calibration | 3 | ||
| Unipolar zero error TC | -0.2 | 0.2 | ppm FSR/°C | AVDD = +21V, AVSS = -11V | 3 | ||
| Unipolar gain error before calibration | -4 | 4 | LSB | AVDD = +21V, AVSS = -11V, TA = +25°C, before user calibration | 3 | ||
| Unipolar gain error after calibration | -1 | 1 | LSB | AVDD = +21V, AVSS = -11V, TA = +25°C, after user calibration | 3 | ||
| Unipolar gain error TC | -0.5 | 0.5 | ppm FSR/°C | AVDD = +21V, AVSS = -11V | 3 | ||
| Unipolar DC crosstalk | -0.2 | 0.2 | LSB | AVDD = +21V, AVSS = -11V, output unloaded | 3 | ||
| Bipolar voltage output | -15 | 15 | V | AVDD = +16.5V, AVSS = -16.5V, VREF = +7.5V, gain = 4 | 3 | ||
| Bipolar voltage output | -10 | 10 | V | VREF = +5V, gain = 4 | 3 | ||
| Unipolar voltage output | 0 | 20 | V | AVDD = +21V, AVSS = -11V, VREF = +5V, gain = 4 | 3 | ||
| Load current | -3 | 3 | mA | Output changes no more than ±1 LSB | 3 | ||
| Power-supply rejection | -0.3 | 0.3 | LSB | AVDD = +5V to +18V, AVSS = -5V to -18V, DVDD = 5V ±10%, VREF = 2V | 3 | ||
| Reference input voltage range | 1 | 8 | V | 4 | |||
| High-level input voltage | VIH | 2.5 | V | IOVDD = 4.5V to 5.5V | 5 | ||
| High-level input voltage | VIH | 2.1 | V | IOVDD = 2.7V to 3.3V | 5 | ||
| High-level input voltage | VIH | 1.6 | V | IOVDD = +1.8V | 5 | ||
| Low-level input voltage | VIL | 0.8 | V | IOVDD = 4.5V to 5.5V | 5 | ||
| Low-level input voltage | VIL | 0.6 | V | IOVDD = 2.7V to 3.3V | 5 | ||
| Low-level input voltage | VIL | 0.2 | V | IOVDD = +1.8V | 5 | ||
| SDO high-level output voltage | VOH | 1.6 | V | IOVDD = +1.8V, sourcing 200µA | 5 | ||
| SDO low-level output voltage | VOL | 0.4 | V | IOVDD = 2.7V to 5.5V, sinking 1mA | 5 | ||
| SDO low-level output voltage | VOL | 0.2 | V | IOVDD = +1.8V, sinking 200µA | 5 | ||
| GPIO low-level output voltage | VOL | 0 | 0.4 | V | IOVDD = 2.7V to 5.5V, sinking 1mA | 5 | |
| AVDD supply voltage | AVDD | 4.75 | 24 | V | 5 | ||
| AVSS supply voltage | AVSS | -18 | -4.75 | V | 5 | ||
| DVDD supply voltage | DVDD | 2.7 | 5.5 | V | 5 | ||
| IOVDD supply voltage | IOVDD | 1.7 | V | upper limit DVDD | 5 | ||
| AIDD normal operation | AIDD | 2.7 | 3.4 | mA/Channel | ±10V output range, no loading current, VOUT = 0V | 5 | |
| AISS normal operation | AISS | 3.3 | 4 | mA/Channel | ±10V output range, no loading current, VOUT = 0V | 5 | |
| DVDD static current | DIDD | 25 | 50 | µA | VIH = IOVDD and VIL = DGND | 5 | |
| Specified temperature range | -40 | 105 | °C | Specified performance | 5 | ||
| AVDD to AVSS | -0.3 | 38 | V | 2 | |||
| AVDD to AGND | -0.3 | 25 | V | 2 | |||
| AVSS to AGND, DGND | -19 | 0.3 | V | 2 | |||
| DVDD to DGND | -0.3 | 6 | V | 2 | |||
| GPIO-x to DGND | -0.3 | 6 | V | 2 | |||
| GPIO-x input current | 5 | mA | 2 | ||||
| Operating temperature range | -40 | 105 | °C | 2 | |||
| Storage temperature range | -65 | 150 | °C | 2 | |||
| Maximum junction temperature | TJ max | 150 | °C | 2 | |||
| Junction-to-ambient thermal impedance | θJA | 57 | °C/W | TQFP | 2 | ||
| Junction-to-case thermal impedance | θJC | 35 | °C/W | TQFP | 2 | ||
| Settling time to 0.03% of FS | 6 | µs | CL = 200pF, RL = 10kΩ, output changes from -10V to +10V or +10V to -10V | 4 | |||
| Slew rate | 5 | V/µs | CL = 200pF, RL = 10kΩ | 4 |
CAD (KiCad official)
- Symbol:
DAC8734SPFBR - Footprint:
Package_QFP:TQFP-48_7x7mm_P0.5mm - 3D model: TQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files:
dac8734spfbr-etched.step/dac8734spfbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);dac8734spfbr.step/dac8734spfbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (44 pp, sha256
03221e6c5bcf7ad4, retrieved 2026-10-31, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).