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CS3318-CQZR

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Cirrus Logic Audio Interface ICs, LQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

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CS3318-CQZR

Cirrus Logic · Audio Interface ICs · LQFP-48(7x7)

CS3318-CQZR from Cirrus Logic, in a LQFP-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 IN1 input Analog input for channel 1, with full-scale level given in the Analog Characteristics table.
2 REFI1 input Analog reference input for channel 1.
3 RESET input Reset input; the device enters a low-power mode when this pin is driven low.
4 MUTE input Mute input that defaults to active low and can be configured as active high.
5 SCL/CCLK input Serial clock for the serial control port (I²C SCL / SPI CCLK).
6 SDA/MOSI bidirectional SDA is the data I/O line of the control port in I²C mode; MOSI is the control port input data line in SPI mode.
7 AD0/CS input AD0 sets the LSB of the default chip address in I²C mode; CS is the control port chip-select in SPI mode.
8 ENOut output Enable output signal for multi-device serial control chain configuration.
9 DGND power_in Digital ground reference for the internal digital section.
10 VD power_in Positive power for the internal digital section, 3.1 V to 3.5 V (3.3 V nominal).
11 REFI8 input Analog reference input for channel 8.
12 IN8 input Analog input for channel 8, with full-scale level given in the Analog Characteristics table.
13 REFO8 output Analog reference output for channel 8.
14 OUT8 output Analog output for channel 8, with full-scale output level given in the Analog Characteristics table.
15 VA+ power_in Positive analog power for the internal analog section, 7.6 V to 9.45 V (9.0 V nominal).
16 VA- power_in Negative analog power for the internal analog section, -9.45 V to -7.6 V (-9.0 V nominal).
17 OUT7 output Analog output for channel 7, with full-scale output level given in the Analog Characteristics table.
18 REFO7 output Analog reference output for channel 7.
19 IN7 input Analog input for channel 7, with full-scale level given in the Analog Characteristics table.
20 REFI7 input Analog reference input for channel 7.
21 REFI6 input Analog reference input for channel 6.
22 IN6 input Analog input for channel 6, with full-scale level given in the Analog Characteristics table.
23 REFO6 output Analog reference output for channel 6.
24 OUT6 output Analog output for channel 6, with full-scale output level given in the Analog Characteristics table.
25 VA+ power_in Positive analog power for the internal analog section, 7.6 V to 9.45 V (9.0 V nominal).
26 VA- power_in Negative analog power for the internal analog section, -9.45 V to -7.6 V (-9.0 V nominal).
27 OUT5 output Analog output for channel 5, with full-scale output level given in the Analog Characteristics table.
28 REFO5 output Analog reference output for channel 5.
29 IN5 input Analog input for channel 5, with full-scale level given in the Analog Characteristics table.
30 REFI5 input Analog reference input for channel 5.
31 REFI4 input Analog reference input for channel 4.
32 IN4 input Analog input for channel 4, with full-scale level given in the Analog Characteristics table.
33 REFO4 output Analog reference output for channel 4.
34 OUT4 output Analog output for channel 4, with full-scale output level given in the Analog Characteristics table.
35 VA+ power_in Positive analog power for the internal analog section, 7.6 V to 9.45 V (9.0 V nominal).
36 VA- power_in Negative analog power for the internal analog section, -9.45 V to -7.6 V (-9.0 V nominal).
37 OUT3 output Analog output for channel 3, with full-scale output level given in the Analog Characteristics table.
38 REFO3 output Analog reference output for channel 3.
39 IN3 input Analog input for channel 3, with full-scale level given in the Analog Characteristics table.
40 REFI3 input Analog reference input for channel 3.
41 REFI2 input Analog reference input for channel 2.
42 IN2 input Analog input for channel 2, with full-scale level given in the Analog Characteristics table.
43 REFO2 output Analog reference output for channel 2.
44 OUT2 output Analog output for channel 2, with full-scale output level given in the Analog Characteristics table.
45 VA+ power_in Positive analog power for the internal analog section, 7.6 V to 9.45 V (9.0 V nominal).
46 VA- power_in Negative analog power for the internal analog section, -9.45 V to -7.6 V (-9.0 V nominal).
47 OUT1 output Analog output for channel 1, with full-scale output level given in the Analog Characteristics table.
48 REFO1 output Analog reference output for channel 1.

Key specifications

Parameter Value
Manufacturer Cirrus Logic
Package LQFP-48(7x7)
Category Communication Interface Chip/UART/485/232
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
Positive Analog Supply VA+ 7.6 9 9.45 V DGND = 0 V 7
Negative Analog Supply VA- -9.45 -9 -7.6 V DGND = 0 V 7
Digital Supply VD 3.1 3.3 3.5 V DGND = 0 V 7
Ambient Operating Temperature TA -10 70 °C Power applied 7
Positive Analog Supply VA+ -0.3 10.5 V DGND = 0 V 7
Negative Analog Supply VA- -10.5 0.3 V DGND = 0 V 7
Digital Supply VD -0.3 3.63 V DGND = 0 V 7
Input Current Iin -10 10 mA Any pin except supplies 7
Ambient Operating Temperature TA -55 125 °C Power applied 7
Storage Temperature Tstg -65 150 °C 7
Input Resistance RIN 8 10 kΩ 8
THD+N THD+N 0.00025 0.00063 % Vin = [(VFS Max - VFS Min) - 1.6 V] Vp-p, 1 kHz, Volume = 0 dB 8
Dynamic Range 121 127 dB 8
Output Noise 1.8 3.6 μVrms Input grounded, volume = 0 dB 8
Offset Voltage VOS 0.75 5 mV Input grounded, volume = 0 dB 8
AC Load Resistance RLOAD 2 kΩ 8
Load Capacitance 100 pF 8
Supply Current VA+ IVA+ 36 50 mA No load, Vin = 0 V, normal operation 8
Supply Current VA- IVA- 36 50 mA No load, Vin = 0 V, normal operation 8
Supply Current VD IVD 0.6 1.07 mA No load, Vin = 0 V, normal operation 8
Power Consumption, Normal Operation 650 904 mW 8
Low-Level Output Voltage VOL 0.4 V Io = 2 mA 9
Input Leakage Current Iin -10 10 μA 9
MUTE Active Pulse Width 2 ms 9
SCL Clock Frequency fscl 100 kHz I²C format 10
Bus Free Time Between Transmissions tbuf 4.7 µs I²C format 10
Start Condition Hold Time thdst 4 µs I²C format 10
Clock Low Time tlow 4.7 µs I²C format 10
Clock High Time thigh 4 µs I²C format 10
SDA Setup Time to SCL Rising tsud 250 ns I²C format 10
CCLK Clock Frequency fsck 0 6 MHz SPI format 11
CCLK Low Time tscl 66 ns SPI format 11
CCLK High Time tsch 66 ns SPI format 11
Junction-to-Ambient Thermal Resistance θJA 48 °C/Watt 48-LQFP, JEDEC multi-layer PCB 43
Junction-to-Case Thermal Resistance θJC 15 °C/Watt 48-LQFP 43
Allowable Junction Temperature 125 °C 43
Step Size 0.25 dB 8
Gain Error 0.5 dB Vol = +22 dB; printed ±0.5 in Typ column 8
Gain Matching Between Channels 0.1 dB Vol = +22 dB; printed ±0.1 in Typ column 8
Input Capacitance CIN 10 pF 8
Interchannel Isolation -120 dB 1 kHz 8
Output Resistance ROUT 100 Ω 8
Short Circuit Current 20 mA 8
Unity Gain Bandwidth, Small Signal 5 MHz 8
Power-Down Supply Current IPD 60 μA All supplies, RESET = low, clock and data lines static, no analog input 8
Power Consumption, Power Down 540 μW RESET = low, clock and data lines static, no analog input 8
Power Supply Rejection Ratio PSRR 80 dB 250 Hz 8
Digital Input Capacitance 8 pF 9

CAD (KiCad official)

  • Symbol: CS3318-CQZR
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: cs3318-cqzr-etched.step / cs3318-cqzr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cs3318-cqzr.step / cs3318-cqzr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Cirrus Logic datasheet (44 pp, sha256 7308f05875494a5c, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF